论文信息 - A high-accuracy, low-power consumption switched-capacitor interface of differential capacitance transducers

A high-accuracy, low-power consumption switched-capacitor interface of differential capacitance transducers

A high-accuracy and low-power consumption interface of differential capacitance transducer based on switched-capacitor (SC) sample/hold (S/H) circuit including a fully-differential subtractor is presented. This interface reduces the nonlinear error by means of double sampling and does not require component matching. Performances of the proposed interface are simulated by HSPICE using a 0.35µm n-well CMOS process parameter. The results have demonstrated that the proposed interface offers increased linearity and lower power consumption.

Satomi Ogawa

[1] Larry K. Baxter,et al. Capacitive Sensors: Design and Applications , 1996 .

[2] Phillip E Allen,et al. CMOS Analog Circuit Design , 1987 .

[3] Kenzo Watanabe,et al. An interface circuit for high-accuracy signal processing of differential-capacitance transducers , 1998, IEEE Trans. Instrum. Meas..

[4] Kenzo Watanabe,et al. Spike-free switched-capacitor circuits , 1987 .

[5] Kenzo Watanabe,et al. A switched-capacitor interface for differential capacitance transducers , 2001, IEEE Trans. Instrum. Meas..

[6] R. Jacob Baker,et al. CMOS Circuit Design, Layout, and Simulation , 1997 .

[7] T. R. Viswanathan,et al. Switched-capacitor circuits with reduced sensitivity to amplifier gain , 1987 .

[8] Gabor C. Temes,et al. High-accuracy circuits for on-chip capacitance ratio testing or sensor readout , 1994 .

[9] Kenzo Watanabe,et al. A switched-capacitor charge-balancing analog-to-digital converter and its application to capacitance measurement , 1987, IEEE Transactions on Instrumentation and Measurement.

[10] Kenzo Watanabe,et al. A high-accuracy high-speed signal processing circuit of differential-capacitance transducers , 1998, IEEE Trans. Instrum. Meas..