Self-biased transconductance amplifier

Gilles Amendola; Yves Blanchard; Anne Exertier; Serge Spirkovitch; Guo Neng Lu; George Alquie

doi:10.1117/12.364455

29 September 1999 Self-biased transconductance amplifier

Gilles Amendola, Yves Blanchard, Anne Exertier, Serge Spirkovitch, Guo Neng Lu, George Alquie

Proceedings Volume 3891, Electronics and Structures for MEMS; (1999) https://doi.org/10.1117/12.364455
Event: Asia Pacific Symposium on Microelectronics and MEMS, 1999, Gold Coast, Australia

Abstract

A CMOS, self-biased transconductance amplifier has been designed to be associated and integrated with a silicon capacitive microphone. To meet requirements especially on gain sensitivity, power consumption, and minimization of parasite capacitance effect, we have proposed a cascode structure with the cascode transistor source used as signa input. Switched-capacitor techniques have been applied for realizing self-bias for the amplifier and ensuring its high- gain operation. The proposed amplifier has been designed and fabricated in a 0.8 micrometers CMOS process. It has a surface area of 210 micrometers by 170 micrometers . Experimental results obtained from measuring the fabricated chip show a high-gain sensitivity and a low power dissipation for the amplifier. Results of simulations and measurements have been discussed.

Citation Download Citation

Gilles Amendola, Yves Blanchard, Anne Exertier, Serge Spirkovitch, Guo Neng Lu, and George Alquie "Self-biased transconductance amplifier", Proc. SPIE 3891, Electronics and Structures for MEMS, (29 September 1999); https://doi.org/10.1117/12.364455

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