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A Baschirotto - One of the best experts on this subject based on the ideXlab platform.

  • A Low-Power Analog Baseband Section for 60-GHz Receivers in 90-nm CMOS
    IEEE Transactions on Microwave Theory and Techniques, 2014
    Co-Authors: Stefano D'amico, Annachiara Spagnolo, Piet Wambacq, A. Donno, V. Chironi, A Baschirotto
    Abstract:

    A low-power Analog Baseband section suitable for 60-GHz receivers using orthogonal frequency-division multiplexing (OFDM) with 16 quadrature amplitude modulation (16-QAM) modulation is presented in this paper. Power efficiency is achieved by combining active-RC with source-follower-based topologies in order to synthesize a custom sixth-order transfer function. The complete chain consists of the cascade of a first-order transimpedance amplifier with finely programmable gain, a fourth-order source-follower-based filter, and a coarse gain first-order programmable gain amplifier. The prototype is implemented in 90-nm CMOS. It achieves a 1-GHz cutoff frequency and programmable gain from 0 to 20 dB with 1-dB step control, drawing 9.5 mA (0-9 dB gain range) or 10.8 mA (10-20 dB gain range) from a 1-V supply. An 8.2-dBm third-order input intercept point and a -145-dBm/Hz input-referred noise power density are measured at 0- and 20-dB gain, respectively. The entire circuit occupies an area of 400 × 390 μm 2 .

  • A 9.5mW Analog Baseband RX section for 60GHz communications in 90nm CMOS
    2011 IEEE Radio Frequency Integrated Circuits Symposium, 2011
    Co-Authors: Stefano D'amico, Annachiara Spagnolo, Piet Wambacq, A. Donno, A Baschirotto
    Abstract:

    The Analog Baseband section of a receiver for high data-rate 60GHz wireless communications is implemented in 90nm CMOS. It consists of the cascade of a 1st-order transimpedance amplifier with finely programmable gain, a 4th-order source-follower based filter and a coarse gain 1st-order programmable gain amplifier, resulting in an overall 6th-order selectivity and a 1GHz cut-off frequency. Gain can be programmed from 0dB up to 20dB with 1dB step control, drawing 9.5mA (0–9dB gain range) or 10.8mA (10–20dB gain range) from a 1V supply. A 8.2dBm IIP3 and a −145dBm/Hz IRN are measured respectively at 0dB and 20dB gain. The entire Baseband section occupies 400×390µm2 die area.

  • A CMOS-90nm 15.6mW 20dBm-in-band-IIP3 Analog Baseband chain for UWB receivers
    2008 Ph.D. Research in Microelectronics and Electronics, 2008
    Co-Authors: A. Cito, Stefano D'amico, A Baschirotto, M. De Matteis, P. Delizia, R. Reis, Wen-hu Zhao, C. Azeredo-leme, A. Tavares
    Abstract:

    In this paper the design of the Analog Baseband chain for UWB receivers in a standard 90 nm CMOS technology is presented. The Baseband chain is composed by the 5th order elliptic Analog low-pass filter and a programmable gain amplifier (with up to 60 dB gain). Due to the large UWB signal bandwidth (250 MHz), the design has been carried-out using a MATLAB model taking into account the capacitance parasitics effect and the opamp finite bandwidth impact on the filter transfer function. From a single 1.2 V supply voltage, the total power consumption is 13 mA per channel, the in-band and out-of-band IIP3 is 20 dBm and the maximum IRN for G>15 dB is 9 nV/radicHz.

  • a 1 2 v 30 4 dbm oip3 reconfigurable Analog Baseband channel for umts wlan transmitters
    IEEE Transactions on Circuits and Systems, 2006
    Co-Authors: N Ghittori, A Vigna, P Malcovati, S Damico, A Baschirotto
    Abstract:

    This paper presents a reconfigurable universal mobile telecommunication systems [(UMTS) and wireless local area network (WLAN) mode)] Analog Baseband transmitter channel composed of a current steering digital-Analog converter (DAC), a transimpedance stage, and a low-pass reconstruction filter. The device operates from a single 1.2-V supply voltage while guaranteeing the high-linearity UMTS/WLAN standard requirements. It can be digitally programmed to process WLAN 802.11a/b/g and UMTS signals, by adjusting the DAC conversion frequency and the low-pass filter cutoff frequency. For the WLAN mode, the DAC operating frequency and the filter bandwidth are set to 100 and 11 MHz, respectively, while for the UMTS mode, they are equal to 50 and 2.11 MHz. The device is realized in a 1.2-V 0.13-mum standard CMOS technology. The die area occupation, equal to 0.9mm2, has been minimized by optimizing the component sharing for the two operation modes. The proposed circuit achieves a 30.4 dBm third-order output referred intermodulation intercept point (OIP3) for the WLAN mode, and a 31.5 dBm-OIP3 when configured for the UMTS mode, while the spurious-free dynamic range is 58 dB for WLAN mode, and 60 dB for UMTS mode. The power consumption is optimized according to the operation mode and is 19.44 mW in WLAN mode and 16.8 mW in UMTS mode

  • Analog Baseband channel for gsm umts wlan bluetooth reconfigurable multistandard terminals
    International Symposium on Circuits and Systems, 2006
    Co-Authors: N Ghittori, A Vigna, P Malcovati, S Damico, A Baschirotto
    Abstract:

    This paper presents a reconfigurable Analog Baseband channel for multistandard receivers. The circuit, consisting of two variable gain amplifiers and a low-pass filter, fulfills the requirements of GSM, WCDMA (UMTS), WLAN (IEEE 802.11a/b/g), and Bluetooth. The gain, bandwidth and power consumption of the circuit are changed through a digital control word depending on the selected standard. Simulation results, including all of the tests prescribed by the different standards, confirm the validity of the proposed solution. The in-band IIP3 evaluated with maximum gain (68dB/39dB) is 5dBm/1dBm for UMTS/WLAN respectively, while the power consumption is 51.7mW/55mW in the two cases.

N Ghittori - One of the best experts on this subject based on the ideXlab platform.

  • a 1 2 v 30 4 dbm oip3 reconfigurable Analog Baseband channel for umts wlan transmitters
    IEEE Transactions on Circuits and Systems, 2006
    Co-Authors: N Ghittori, A Vigna, P Malcovati, S Damico, A Baschirotto
    Abstract:

    This paper presents a reconfigurable universal mobile telecommunication systems [(UMTS) and wireless local area network (WLAN) mode)] Analog Baseband transmitter channel composed of a current steering digital-Analog converter (DAC), a transimpedance stage, and a low-pass reconstruction filter. The device operates from a single 1.2-V supply voltage while guaranteeing the high-linearity UMTS/WLAN standard requirements. It can be digitally programmed to process WLAN 802.11a/b/g and UMTS signals, by adjusting the DAC conversion frequency and the low-pass filter cutoff frequency. For the WLAN mode, the DAC operating frequency and the filter bandwidth are set to 100 and 11 MHz, respectively, while for the UMTS mode, they are equal to 50 and 2.11 MHz. The device is realized in a 1.2-V 0.13-mum standard CMOS technology. The die area occupation, equal to 0.9mm2, has been minimized by optimizing the component sharing for the two operation modes. The proposed circuit achieves a 30.4 dBm third-order output referred intermodulation intercept point (OIP3) for the WLAN mode, and a 31.5 dBm-OIP3 when configured for the UMTS mode, while the spurious-free dynamic range is 58 dB for WLAN mode, and 60 dB for UMTS mode. The power consumption is optimized according to the operation mode and is 19.44 mW in WLAN mode and 16.8 mW in UMTS mode

  • Analog Baseband channel for gsm umts wlan bluetooth reconfigurable multistandard terminals
    International Symposium on Circuits and Systems, 2006
    Co-Authors: N Ghittori, A Vigna, P Malcovati, S Damico, A Baschirotto
    Abstract:

    This paper presents a reconfigurable Analog Baseband channel for multistandard receivers. The circuit, consisting of two variable gain amplifiers and a low-pass filter, fulfills the requirements of GSM, WCDMA (UMTS), WLAN (IEEE 802.11a/b/g), and Bluetooth. The gain, bandwidth and power consumption of the circuit are changed through a digital control word depending on the selected standard. Simulation results, including all of the tests prescribed by the different standards, confirm the validity of the proposed solution. The in-band IIP3 evaluated with maximum gain (68dB/39dB) is 5dBm/1dBm for UMTS/WLAN respectively, while the power consumption is 51.7mW/55mW in the two cases.

  • A 1.2- V 30.4-dBm OIP3 Reconfigurable Analog Baseband Channel for UMTS/WLAN Transmitters
    IEEE Transactions on Circuits and Systems I: Regular Papers, 2006
    Co-Authors: N Ghittori, Stefano D'amico, A Vigna, P Malcovati, A Baschirotto
    Abstract:

    This paper presents a reconfigurable universal mobile telecommunication systems [(UMTS) and wireless local area network (WLAN) mode)] Analog Baseband transmitter channel composed of a current steering digital-Analog converter (DAC), a transimpedance stage, and a low-pass reconstruction filter. The device operates from a single 1.2-V supply voltage while guaranteeing the high-linearity UMTS/WLAN standard requirements. It can be digitally programmed to process WLAN 802.11a/b/g and UMTS signals, by adjusting the DAC conversion frequency and the low-pass filter cutoff frequency. For the WLAN mode, the DAC operating frequency and the filter bandwidth are set to 100 and 11 MHz, respectively, while for the UMTS mode, they are equal to 50 and 2.11 MHz. The device is realized in a 1.2-V 0.13-mum standard CMOS technology. The die area occupation, equal to 0.9mm2, has been minimized by optimizing the component sharing for the two operation modes. The proposed circuit achieves a 30.4 dBm third-order output referred intermodulation intercept point (OIP3) for the WLAN mode, and a 31.5 dBm-OIP3 when configured for the UMTS mode, while the spurious-free dynamic range is 58 dB for WLAN mode, and 60 dB for UMTS mode. The power consumption is optimized according to the operation mode and is 19.44 mW in WLAN mode and 16.8 mW in UMTS mode

  • ISCAS - Analog Baseband channel for GSM/UMTS/WLAN/Bluetooth reconfigurable multistandard terminals
    2006 IEEE International Symposium on Circuits and Systems, 1
    Co-Authors: N Ghittori, Stefano D'amico, A Vigna, P Malcovati, A Baschirotto
    Abstract:

    This paper presents a reconfigurable Analog Baseband channel for multistandard receivers. The circuit, consisting of two variable gain amplifiers and a low-pass filter, fulfills the requirements of GSM, WCDMA (UMTS), WLAN (IEEE 802.11a/b/g), and Bluetooth. The gain, bandwidth and power consumption of the circuit are changed through a digital control word depending on the selected standard. Simulation results, including all of the tests prescribed by the different standards, confirm the validity of the proposed solution. The in-band IIP3 evaluated with maximum gain (68dB/39dB) is 5dBm/1dBm for UMTS/WLAN respectively, while the power consumption is 51.7mW/55mW in the two cases.

A Vigna - One of the best experts on this subject based on the ideXlab platform.

  • a 1 2 v 30 4 dbm oip3 reconfigurable Analog Baseband channel for umts wlan transmitters
    IEEE Transactions on Circuits and Systems, 2006
    Co-Authors: N Ghittori, A Vigna, P Malcovati, S Damico, A Baschirotto
    Abstract:

    This paper presents a reconfigurable universal mobile telecommunication systems [(UMTS) and wireless local area network (WLAN) mode)] Analog Baseband transmitter channel composed of a current steering digital-Analog converter (DAC), a transimpedance stage, and a low-pass reconstruction filter. The device operates from a single 1.2-V supply voltage while guaranteeing the high-linearity UMTS/WLAN standard requirements. It can be digitally programmed to process WLAN 802.11a/b/g and UMTS signals, by adjusting the DAC conversion frequency and the low-pass filter cutoff frequency. For the WLAN mode, the DAC operating frequency and the filter bandwidth are set to 100 and 11 MHz, respectively, while for the UMTS mode, they are equal to 50 and 2.11 MHz. The device is realized in a 1.2-V 0.13-mum standard CMOS technology. The die area occupation, equal to 0.9mm2, has been minimized by optimizing the component sharing for the two operation modes. The proposed circuit achieves a 30.4 dBm third-order output referred intermodulation intercept point (OIP3) for the WLAN mode, and a 31.5 dBm-OIP3 when configured for the UMTS mode, while the spurious-free dynamic range is 58 dB for WLAN mode, and 60 dB for UMTS mode. The power consumption is optimized according to the operation mode and is 19.44 mW in WLAN mode and 16.8 mW in UMTS mode

  • Analog Baseband channel for gsm umts wlan bluetooth reconfigurable multistandard terminals
    International Symposium on Circuits and Systems, 2006
    Co-Authors: N Ghittori, A Vigna, P Malcovati, S Damico, A Baschirotto
    Abstract:

    This paper presents a reconfigurable Analog Baseband channel for multistandard receivers. The circuit, consisting of two variable gain amplifiers and a low-pass filter, fulfills the requirements of GSM, WCDMA (UMTS), WLAN (IEEE 802.11a/b/g), and Bluetooth. The gain, bandwidth and power consumption of the circuit are changed through a digital control word depending on the selected standard. Simulation results, including all of the tests prescribed by the different standards, confirm the validity of the proposed solution. The in-band IIP3 evaluated with maximum gain (68dB/39dB) is 5dBm/1dBm for UMTS/WLAN respectively, while the power consumption is 51.7mW/55mW in the two cases.

  • A 1.2- V 30.4-dBm OIP3 Reconfigurable Analog Baseband Channel for UMTS/WLAN Transmitters
    IEEE Transactions on Circuits and Systems I: Regular Papers, 2006
    Co-Authors: N Ghittori, Stefano D'amico, A Vigna, P Malcovati, A Baschirotto
    Abstract:

    This paper presents a reconfigurable universal mobile telecommunication systems [(UMTS) and wireless local area network (WLAN) mode)] Analog Baseband transmitter channel composed of a current steering digital-Analog converter (DAC), a transimpedance stage, and a low-pass reconstruction filter. The device operates from a single 1.2-V supply voltage while guaranteeing the high-linearity UMTS/WLAN standard requirements. It can be digitally programmed to process WLAN 802.11a/b/g and UMTS signals, by adjusting the DAC conversion frequency and the low-pass filter cutoff frequency. For the WLAN mode, the DAC operating frequency and the filter bandwidth are set to 100 and 11 MHz, respectively, while for the UMTS mode, they are equal to 50 and 2.11 MHz. The device is realized in a 1.2-V 0.13-mum standard CMOS technology. The die area occupation, equal to 0.9mm2, has been minimized by optimizing the component sharing for the two operation modes. The proposed circuit achieves a 30.4 dBm third-order output referred intermodulation intercept point (OIP3) for the WLAN mode, and a 31.5 dBm-OIP3 when configured for the UMTS mode, while the spurious-free dynamic range is 58 dB for WLAN mode, and 60 dB for UMTS mode. The power consumption is optimized according to the operation mode and is 19.44 mW in WLAN mode and 16.8 mW in UMTS mode

  • ISCAS - Analog Baseband channel for GSM/UMTS/WLAN/Bluetooth reconfigurable multistandard terminals
    2006 IEEE International Symposium on Circuits and Systems, 1
    Co-Authors: N Ghittori, Stefano D'amico, A Vigna, P Malcovati, A Baschirotto
    Abstract:

    This paper presents a reconfigurable Analog Baseband channel for multistandard receivers. The circuit, consisting of two variable gain amplifiers and a low-pass filter, fulfills the requirements of GSM, WCDMA (UMTS), WLAN (IEEE 802.11a/b/g), and Bluetooth. The gain, bandwidth and power consumption of the circuit are changed through a digital control word depending on the selected standard. Simulation results, including all of the tests prescribed by the different standards, confirm the validity of the proposed solution. The in-band IIP3 evaluated with maximum gain (68dB/39dB) is 5dBm/1dBm for UMTS/WLAN respectively, while the power consumption is 51.7mW/55mW in the two cases.

P Malcovati - One of the best experts on this subject based on the ideXlab platform.

  • a 1 2 v 30 4 dbm oip3 reconfigurable Analog Baseband channel for umts wlan transmitters
    IEEE Transactions on Circuits and Systems, 2006
    Co-Authors: N Ghittori, A Vigna, P Malcovati, S Damico, A Baschirotto
    Abstract:

    This paper presents a reconfigurable universal mobile telecommunication systems [(UMTS) and wireless local area network (WLAN) mode)] Analog Baseband transmitter channel composed of a current steering digital-Analog converter (DAC), a transimpedance stage, and a low-pass reconstruction filter. The device operates from a single 1.2-V supply voltage while guaranteeing the high-linearity UMTS/WLAN standard requirements. It can be digitally programmed to process WLAN 802.11a/b/g and UMTS signals, by adjusting the DAC conversion frequency and the low-pass filter cutoff frequency. For the WLAN mode, the DAC operating frequency and the filter bandwidth are set to 100 and 11 MHz, respectively, while for the UMTS mode, they are equal to 50 and 2.11 MHz. The device is realized in a 1.2-V 0.13-mum standard CMOS technology. The die area occupation, equal to 0.9mm2, has been minimized by optimizing the component sharing for the two operation modes. The proposed circuit achieves a 30.4 dBm third-order output referred intermodulation intercept point (OIP3) for the WLAN mode, and a 31.5 dBm-OIP3 when configured for the UMTS mode, while the spurious-free dynamic range is 58 dB for WLAN mode, and 60 dB for UMTS mode. The power consumption is optimized according to the operation mode and is 19.44 mW in WLAN mode and 16.8 mW in UMTS mode

  • Analog Baseband channel for gsm umts wlan bluetooth reconfigurable multistandard terminals
    International Symposium on Circuits and Systems, 2006
    Co-Authors: N Ghittori, A Vigna, P Malcovati, S Damico, A Baschirotto
    Abstract:

    This paper presents a reconfigurable Analog Baseband channel for multistandard receivers. The circuit, consisting of two variable gain amplifiers and a low-pass filter, fulfills the requirements of GSM, WCDMA (UMTS), WLAN (IEEE 802.11a/b/g), and Bluetooth. The gain, bandwidth and power consumption of the circuit are changed through a digital control word depending on the selected standard. Simulation results, including all of the tests prescribed by the different standards, confirm the validity of the proposed solution. The in-band IIP3 evaluated with maximum gain (68dB/39dB) is 5dBm/1dBm for UMTS/WLAN respectively, while the power consumption is 51.7mW/55mW in the two cases.

  • A 1.2- V 30.4-dBm OIP3 Reconfigurable Analog Baseband Channel for UMTS/WLAN Transmitters
    IEEE Transactions on Circuits and Systems I: Regular Papers, 2006
    Co-Authors: N Ghittori, Stefano D'amico, A Vigna, P Malcovati, A Baschirotto
    Abstract:

    This paper presents a reconfigurable universal mobile telecommunication systems [(UMTS) and wireless local area network (WLAN) mode)] Analog Baseband transmitter channel composed of a current steering digital-Analog converter (DAC), a transimpedance stage, and a low-pass reconstruction filter. The device operates from a single 1.2-V supply voltage while guaranteeing the high-linearity UMTS/WLAN standard requirements. It can be digitally programmed to process WLAN 802.11a/b/g and UMTS signals, by adjusting the DAC conversion frequency and the low-pass filter cutoff frequency. For the WLAN mode, the DAC operating frequency and the filter bandwidth are set to 100 and 11 MHz, respectively, while for the UMTS mode, they are equal to 50 and 2.11 MHz. The device is realized in a 1.2-V 0.13-mum standard CMOS technology. The die area occupation, equal to 0.9mm2, has been minimized by optimizing the component sharing for the two operation modes. The proposed circuit achieves a 30.4 dBm third-order output referred intermodulation intercept point (OIP3) for the WLAN mode, and a 31.5 dBm-OIP3 when configured for the UMTS mode, while the spurious-free dynamic range is 58 dB for WLAN mode, and 60 dB for UMTS mode. The power consumption is optimized according to the operation mode and is 19.44 mW in WLAN mode and 16.8 mW in UMTS mode

  • ISCAS - Analog Baseband channel for GSM/UMTS/WLAN/Bluetooth reconfigurable multistandard terminals
    2006 IEEE International Symposium on Circuits and Systems, 1
    Co-Authors: N Ghittori, Stefano D'amico, A Vigna, P Malcovati, A Baschirotto
    Abstract:

    This paper presents a reconfigurable Analog Baseband channel for multistandard receivers. The circuit, consisting of two variable gain amplifiers and a low-pass filter, fulfills the requirements of GSM, WCDMA (UMTS), WLAN (IEEE 802.11a/b/g), and Bluetooth. The gain, bandwidth and power consumption of the circuit are changed through a digital control word depending on the selected standard. Simulation results, including all of the tests prescribed by the different standards, confirm the validity of the proposed solution. The in-band IIP3 evaluated with maximum gain (68dB/39dB) is 5dBm/1dBm for UMTS/WLAN respectively, while the power consumption is 51.7mW/55mW in the two cases.

Stefano D'amico - One of the best experts on this subject based on the ideXlab platform.

  • A Low-Power Analog Baseband Section for 60-GHz Receivers in 90-nm CMOS
    IEEE Transactions on Microwave Theory and Techniques, 2014
    Co-Authors: Stefano D'amico, Annachiara Spagnolo, Piet Wambacq, A. Donno, V. Chironi, A Baschirotto
    Abstract:

    A low-power Analog Baseband section suitable for 60-GHz receivers using orthogonal frequency-division multiplexing (OFDM) with 16 quadrature amplitude modulation (16-QAM) modulation is presented in this paper. Power efficiency is achieved by combining active-RC with source-follower-based topologies in order to synthesize a custom sixth-order transfer function. The complete chain consists of the cascade of a first-order transimpedance amplifier with finely programmable gain, a fourth-order source-follower-based filter, and a coarse gain first-order programmable gain amplifier. The prototype is implemented in 90-nm CMOS. It achieves a 1-GHz cutoff frequency and programmable gain from 0 to 20 dB with 1-dB step control, drawing 9.5 mA (0-9 dB gain range) or 10.8 mA (10-20 dB gain range) from a 1-V supply. An 8.2-dBm third-order input intercept point and a -145-dBm/Hz input-referred noise power density are measured at 0- and 20-dB gain, respectively. The entire circuit occupies an area of 400 × 390 μm 2 .

  • A four-path 60GHz phased-array receiver with injection-locked LO, hybrid beamforming and Analog Baseband section in 90nm CMOS
    Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium, 2012
    Co-Authors: Kuba Raczkowski, Giovanni Mangraviti, Viki Szortyka, Annachiara Spagnolo, Roeland Vandebriel, Vojkan Vidojkovic, B. Parvais, Charlotte Soens, Stefano D'amico, Piet Wambacq
    Abstract:

    We present a 60 GHz four-antenna phased-array direct conversion receiver in 90 nm RF CMOS with an LO based on subharmonic injection locking, beamforming that is partially in the LO path and partially at Analog Baseband, and an Analog Baseband section. The LO system features a set of four 60 GHz oscillators, locked to the fifth harmonic of a central oscillator, improving the phase noise performance and robustness. Phase shifting is realized in two steps and two domains, which reduces the complexity of phase shifters and signal degradation at Analog Baseband. Signal combination is performed at Analog Baseband, followed by a variable-gain amplifier and a Baseband filter, which together allow for 6-th order filtering with 880 MHz bandwidth and 20 dB of gain adjustment with 1 dB steps. The system provides a maximum conversion gain of 42 dB with a total power consumption of 450 mW and chip area of 3.15 × 1.9 mm.

  • A 9.5mW Analog Baseband RX section for 60GHz communications in 90nm CMOS
    2011 IEEE Radio Frequency Integrated Circuits Symposium, 2011
    Co-Authors: Stefano D'amico, Annachiara Spagnolo, Piet Wambacq, A. Donno, A Baschirotto
    Abstract:

    The Analog Baseband section of a receiver for high data-rate 60GHz wireless communications is implemented in 90nm CMOS. It consists of the cascade of a 1st-order transimpedance amplifier with finely programmable gain, a 4th-order source-follower based filter and a coarse gain 1st-order programmable gain amplifier, resulting in an overall 6th-order selectivity and a 1GHz cut-off frequency. Gain can be programmed from 0dB up to 20dB with 1dB step control, drawing 9.5mA (0–9dB gain range) or 10.8mA (10–20dB gain range) from a 1V supply. A 8.2dBm IIP3 and a −145dBm/Hz IRN are measured respectively at 0dB and 20dB gain. The entire Baseband section occupies 400×390µm2 die area.

  • A CMOS-90nm 15.6mW 20dBm-in-band-IIP3 Analog Baseband chain for UWB receivers
    2008 Ph.D. Research in Microelectronics and Electronics, 2008
    Co-Authors: A. Cito, Stefano D'amico, A Baschirotto, M. De Matteis, P. Delizia, R. Reis, Wen-hu Zhao, C. Azeredo-leme, A. Tavares
    Abstract:

    In this paper the design of the Analog Baseband chain for UWB receivers in a standard 90 nm CMOS technology is presented. The Baseband chain is composed by the 5th order elliptic Analog low-pass filter and a programmable gain amplifier (with up to 60 dB gain). Due to the large UWB signal bandwidth (250 MHz), the design has been carried-out using a MATLAB model taking into account the capacitance parasitics effect and the opamp finite bandwidth impact on the filter transfer function. From a single 1.2 V supply voltage, the total power consumption is 13 mA per channel, the in-band and out-of-band IIP3 is 20 dBm and the maximum IRN for G>15 dB is 9 nV/radicHz.

  • A 1.2- V 30.4-dBm OIP3 Reconfigurable Analog Baseband Channel for UMTS/WLAN Transmitters
    IEEE Transactions on Circuits and Systems I: Regular Papers, 2006
    Co-Authors: N Ghittori, Stefano D'amico, A Vigna, P Malcovati, A Baschirotto
    Abstract:

    This paper presents a reconfigurable universal mobile telecommunication systems [(UMTS) and wireless local area network (WLAN) mode)] Analog Baseband transmitter channel composed of a current steering digital-Analog converter (DAC), a transimpedance stage, and a low-pass reconstruction filter. The device operates from a single 1.2-V supply voltage while guaranteeing the high-linearity UMTS/WLAN standard requirements. It can be digitally programmed to process WLAN 802.11a/b/g and UMTS signals, by adjusting the DAC conversion frequency and the low-pass filter cutoff frequency. For the WLAN mode, the DAC operating frequency and the filter bandwidth are set to 100 and 11 MHz, respectively, while for the UMTS mode, they are equal to 50 and 2.11 MHz. The device is realized in a 1.2-V 0.13-mum standard CMOS technology. The die area occupation, equal to 0.9mm2, has been minimized by optimizing the component sharing for the two operation modes. The proposed circuit achieves a 30.4 dBm third-order output referred intermodulation intercept point (OIP3) for the WLAN mode, and a 31.5 dBm-OIP3 when configured for the UMTS mode, while the spurious-free dynamic range is 58 dB for WLAN mode, and 60 dB for UMTS mode. The power consumption is optimized according to the operation mode and is 19.44 mW in WLAN mode and 16.8 mW in UMTS mode