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Jose Silva-martinez - One of the best experts on this subject based on the ideXlab platform.

  • ISCAS - A programmable switched-Capacitor Filter
    Proceedings of IEEE International Symposium on Circuits and Systems - ISCAS '94, 1
    Co-Authors: Jose Silva-martinez
    Abstract:

    A switched-Capacitor Filter with independent programmable gain at either low frequency, passband frequency and high frequency band is presented. The gain at each of these frequency bands is controlled by a Capacitor bank. This universal second order switched-Capacitor Filter employs 3 operational amplifiers, 3 Capacitor banks and some additional Capacitors. Experimental results, from a breadboard, are in good agreement with the simulated and theoretical ones. >

  • ISCAS (4) - A high-Q, switched-Capacitor Filter with reduced capacitance spread using a randomized nonuniform sampling technique
    2002 IEEE International Symposium on Circuits and Systems. Proceedings (Cat. No.02CH37353), 1
    Co-Authors: J. Adut, Jose Silva-martinez
    Abstract:

    In high-Q, low-sampling rate switched-Capacitor Filters the main limitation comes from the capacitance spread. A secondary clock, that averages at an integer fraction of the main clock signal, is used to reduce the capacitance spread by a factor of N, relaxing the operational transconductance amplifier (OTA) requirements. The secondary clock is pulse position modulated to reduce the power of alias components. Experimental results obtained from a second-order bandpass switched-Capacitor Filter breadboard prototype are shown.

Cheng-ming Ying - One of the best experts on this subject based on the ideXlab platform.

Antonio Liscidini - One of the best experts on this subject based on the ideXlab platform.

  • a third order integrated passive switched Capacitor Filter obtained with a continuous time design approach
    IEEE Transactions on Circuits and Systems I-regular Papers, 2019
    Co-Authors: Sevil Zeynep Lulec, D A Johns, Antonio Liscidini
    Abstract:

    A third-order passive switched-Capacitor low-pass Filter is presented together with experimental results. The current input-voltage output Filter structure realizes complex-conjugate poles although it is composed of switches and Capacitors. The results are verified with measurements performed on the Filter prototype integrated in a 0.13- $\mu \text{m}$ CMOS technology. The prototype has a cut-off frequency of 470 kHz, 150- $\mu \text{W}$ power consumption from 1.2-V power supply, 92-dB SFDR, and an active area of 0.06 mm2. The switch-Capacitor Filter was obtained using a continuous-time model that is also described here and is useful for design, analysis, and simulation of oversampled switched-Capacitor circuits. The model is applicable to a variety of topologies including multi-phase passive switched-Capacitor Filters, switched-Capacitor integrators, as well as switched-Capacitor dc/dc converters.

  • a 150 μw 3 rd order butterworth passive switched Capacitor Filter with 92 db sfdr
    Symposium on VLSI Circuits, 2017
    Co-Authors: Zeynep S Lulec, D A Johns, Antonio Liscidini
    Abstract:

    For the first time, complex conjugate poles are integrated on silicon by using only switches and Capacitors. A general design methodology is proposed to implement low-pass transfer functions with sharper frequency profile compared to the passive-switched-Capacitor topologies present in the literature. Theory and simulation results are validated through the measurements of a 0.13μm prototype Filter. The 3rd-order Filter has a cut-off frequency of 540 kHz, an integrated input referred noise of 17μV and out-of-band IIP3 of 55dBm, while consuming 150μW in the phase clock generator.

Paul J. Hurst - One of the best experts on this subject based on the ideXlab platform.

  • Shifting the frequency response of switched-Capacitor Filters by nonuniform sampling
    IEEE Transactions on Circuits and Systems, 1991
    Co-Authors: Paul J. Hurst
    Abstract:

    A clock with nonuniformly spaced sampling times can be used to shift the frequency response of switched-Capacitor Filters. By using such a clock, which deviates only slightly from a uniform sampling clock, small shifts in the frequency response of a switched-Capacitor Filter can be realized. The nonuniform sampling generates undesired modulation sidebands which are small if the deviation from uniform sampling is small. Computer simulations and measured data are presented to support equations that predict the frequency response shift and the amplitude of the undesired sidebands. This technique can be used to correct frequency response errors in monolithic switched-Capacitor Filters caused by Capacitor ratio inaccuracies. It may also be useful in applications such as spectrum analyzers and tone generators. >

Jen-shiun Chiang - One of the best experts on this subject based on the ideXlab platform.