The Experts below are selected from a list of 258 Experts worldwide ranked by ideXlab platform
O. Shoaei - One of the best experts on this subject based on the ideXlab platform.
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Digital background calibration of pipeline ADC with Open-Loop Gain stage
2006 IEEE International Symposium on Circuits and Systems, 2006Co-Authors: B. Tavassoli, O. ShoaeiAbstract:In this work, a digital background calibration method for pipelined ADC is proposed which can compensate for the nonlinearity in amplifier Gain. The proposed scheme is based on input statistical distribution property which is assumed to be known. The error correction is completely performed in digital domain. In analog domain it is only necessary to add two comparators for generating calibration threshold. Results show an improvement of 16 dB in SNDR for a nonlinear Gain stage designed in a 1.5 V supply and 0.35 mum CMOS technology
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ISCAS - Digital background calibration of pipeline ADC with Open-Loop Gain stage
2006 IEEE International Symposium on Circuits and Systems, 2006Co-Authors: B. Tavassoli, O. ShoaeiAbstract:In this work, a digital background calibration method for pipelined ADC is proposed which can compensate for the nonlinearity in amplifier Gain. The proposed scheme is based on input statistical distribution property which is assumed to be known. The error correction is completely performed in digital domain. In analog domain it is only necessary to add two comparators for generating calibration threshold. Results show an improvement of 16 dB in SNDR for a nonlinear Gain stage designed in a 1.5 V supply and 0.35 /spl mu/m CMOS technology.
Gerhard Tröster - One of the best experts on this subject based on the ideXlab platform.
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A-SSCC - 22.5 dB Open-Loop Gain, 31 kHz GBW pseudo-CMOS based operational amplifier with a-IGZO TFTs on a flexible film
2014 IEEE Asian Solid-State Circuits Conference (A-SSCC), 2014Co-Authors: Koich Ishida, Reza Shabanpour, Bahman K. Boroujeni, Tilo Meister, Corrado Carta, Frank. Ellinger, Luisa Petti, Niko S. Münzenrieder, Giovanni A. Salvatore, Gerhard TrösterAbstract:This paper presents an operational amplifier based on pseudo-CMOS blocks and integrated in a flexible a-IGZO TFT technology. The circuit consists of only nMOS transistors, and the pair of active loads is in a pseudo-CMOS configuration. These active loads allow various kinds of common mode feedback schemes or cross-coupled connection, typical for CMOS operational amplifiers. The proposed amplifier is fabricated on a flexible film, and characterized with 5 V supply voltage and an output load capacitance of 15 pF. The measured Open-Loop Gain is 22.5 dB, which is the highest reported for operational amplifiers in metal-oxide TFT technology. The measured bandwidth and Gain bandwidth products are 5.6 kHz, and 31 kHz, respectively with 160 μW power consumption, which is lowest among flexible operational amplifies.
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22.5 dB Open-Loop Gain, 31 kHz GBW pseudo-CMOS based operational amplifier with a-IGZO TFTs on a flexible film
2014 IEEE Asian Solid-State Circuits Conference (A-SSCC), 2014Co-Authors: Koich Ishida, Reza Shabanpour, Bahman K. Boroujeni, Tilo Meister, Corrado Carta, Frank. Ellinger, Luisa Petti, Niko S. Münzenrieder, Giovanni A. Salvatore, Gerhard TrösterAbstract:This paper presents an operational amplifier based on pseudo-CMOS blocks and integrated in a flexible a-IGZO TFT technology. The circuit consists of only nMOS transistors, and the pair of active loads is in a pseudo-CMOS configuration. These active loads allow various kinds of common mode feedback schemes or cross-coupled connection, typical for CMOS operational amplifiers. The proposed amplifier is fabricated on a flexible film, and characterized with 5 V supply voltage and an output load capacitance of 15 pF. The measured Open-Loop Gain is 22.5 dB, which is the highest reported for operational amplifiers in metal-oxide TFT technology. The measured bandwidth and Gain bandwidth products are 5.6 kHz, and 31 kHz, respectively with 160 μW power consumption, which is lowest among flexible operational amplifies.
B. Tavassoli - One of the best experts on this subject based on the ideXlab platform.
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Digital background calibration of pipeline ADC with Open-Loop Gain stage
2006 IEEE International Symposium on Circuits and Systems, 2006Co-Authors: B. Tavassoli, O. ShoaeiAbstract:In this work, a digital background calibration method for pipelined ADC is proposed which can compensate for the nonlinearity in amplifier Gain. The proposed scheme is based on input statistical distribution property which is assumed to be known. The error correction is completely performed in digital domain. In analog domain it is only necessary to add two comparators for generating calibration threshold. Results show an improvement of 16 dB in SNDR for a nonlinear Gain stage designed in a 1.5 V supply and 0.35 mum CMOS technology
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ISCAS - Digital background calibration of pipeline ADC with Open-Loop Gain stage
2006 IEEE International Symposium on Circuits and Systems, 2006Co-Authors: B. Tavassoli, O. ShoaeiAbstract:In this work, a digital background calibration method for pipelined ADC is proposed which can compensate for the nonlinearity in amplifier Gain. The proposed scheme is based on input statistical distribution property which is assumed to be known. The error correction is completely performed in digital domain. In analog domain it is only necessary to add two comparators for generating calibration threshold. Results show an improvement of 16 dB in SNDR for a nonlinear Gain stage designed in a 1.5 V supply and 0.35 /spl mu/m CMOS technology.
Maurits Ortmanns - One of the best experts on this subject based on the ideXlab platform.
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A high open loop Gain common mode feedback technique for fully differential amplifiers
2014 IEEE 12th International New Circuits and Systems Conference (NEWCAS), 2014Co-Authors: Rudolf Ritter, Matthias Lorenz, Maurits OrtmannsAbstract:Fully differential amplifiers usually need a common mode feedback circuit to stabilize its common mode voltage. The open loop common mode feedback circuit needs to fulfill certain conditions to guarantee fast settling and stability. If these conditions are not met with an applied feedback circuit, commonly the Gain of the feedback circuit is reduced and therefore also the speed, which may enable stability. This results in smoother settling behavior, but at the cost of worse accuracy. The proposed technique just reduces the speed, but not the open loop Gain. This is possible with nested feedback capacitors, offering the possibility to stabilize the common mode and differential loop independently, enabling stability and smooth settling without decreased accuracy. An amplifier with a unity Gain bandwidth of 3.5 GHz applying this technique has been manufactured in a 250 nm BiCMOS technology and measurement results prove the theory.
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NEWCAS - A high open loop Gain common mode feedback technique for fully differential amplifiers
2014 IEEE 12th International New Circuits and Systems Conference (NEWCAS), 2014Co-Authors: Rudolf Ritter, Matthias Lorenz, Maurits OrtmannsAbstract:Fully differential amplifiers usually need a common mode feedback circuit to stabilize its common mode voltage. The open loop common mode feedback circuit needs to fulfill certain conditions to guarantee fast settling and stability. If these conditions are not met with an applied feedback circuit, commonly the Gain of the feedback circuit is reduced and therefore also the speed, which may enable stability. This results in smoother settling behavior, but at the cost of worse accuracy. The proposed technique just reduces the speed, but not the open loop Gain. This is possible with nested feedback capacitors, offering the possibility to stabilize the common mode and differential loop independently, enabling stability and smooth settling without decreased accuracy. An amplifier with a unity Gain bandwidth of 3.5GHz applying this technique has been manufactured in a 250nm BiCMOS technology and measurement results prove the theory.
Koich Ishida - One of the best experts on this subject based on the ideXlab platform.
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A-SSCC - 22.5 dB Open-Loop Gain, 31 kHz GBW pseudo-CMOS based operational amplifier with a-IGZO TFTs on a flexible film
2014 IEEE Asian Solid-State Circuits Conference (A-SSCC), 2014Co-Authors: Koich Ishida, Reza Shabanpour, Bahman K. Boroujeni, Tilo Meister, Corrado Carta, Frank. Ellinger, Luisa Petti, Niko S. Münzenrieder, Giovanni A. Salvatore, Gerhard TrösterAbstract:This paper presents an operational amplifier based on pseudo-CMOS blocks and integrated in a flexible a-IGZO TFT technology. The circuit consists of only nMOS transistors, and the pair of active loads is in a pseudo-CMOS configuration. These active loads allow various kinds of common mode feedback schemes or cross-coupled connection, typical for CMOS operational amplifiers. The proposed amplifier is fabricated on a flexible film, and characterized with 5 V supply voltage and an output load capacitance of 15 pF. The measured Open-Loop Gain is 22.5 dB, which is the highest reported for operational amplifiers in metal-oxide TFT technology. The measured bandwidth and Gain bandwidth products are 5.6 kHz, and 31 kHz, respectively with 160 μW power consumption, which is lowest among flexible operational amplifies.
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22.5 dB Open-Loop Gain, 31 kHz GBW pseudo-CMOS based operational amplifier with a-IGZO TFTs on a flexible film
2014 IEEE Asian Solid-State Circuits Conference (A-SSCC), 2014Co-Authors: Koich Ishida, Reza Shabanpour, Bahman K. Boroujeni, Tilo Meister, Corrado Carta, Frank. Ellinger, Luisa Petti, Niko S. Münzenrieder, Giovanni A. Salvatore, Gerhard TrösterAbstract:This paper presents an operational amplifier based on pseudo-CMOS blocks and integrated in a flexible a-IGZO TFT technology. The circuit consists of only nMOS transistors, and the pair of active loads is in a pseudo-CMOS configuration. These active loads allow various kinds of common mode feedback schemes or cross-coupled connection, typical for CMOS operational amplifiers. The proposed amplifier is fabricated on a flexible film, and characterized with 5 V supply voltage and an output load capacitance of 15 pF. The measured Open-Loop Gain is 22.5 dB, which is the highest reported for operational amplifiers in metal-oxide TFT technology. The measured bandwidth and Gain bandwidth products are 5.6 kHz, and 31 kHz, respectively with 160 μW power consumption, which is lowest among flexible operational amplifies.
