An FVF-Based Gm-Enhanced fully balanced Preamplifier

A High-gain, fully balanced preamplifier is presented. The proposed structure advantages flipped voltage follower scheme to achieve a compact current conveyor with very low input impedance. The presented current conveyor then is used as a core element to realize a high-gain, gm-enhanced trans-conductance amplifier. The presented amplifier is suitable for application as a preamplifier. The high gain of amplifier makes it very suitable to be configured in a feedback form to deliver a high-precision predefined or programmable amplification gain. The proposed structure draws a very low power of ۱۵۰nW from a ۰.۶V supply voltage. The Spectre Post-layout simulations with TSMC ۱۸۰nm CMOS technology have been performed. The proposed amplifier exhibits an open-loop DC gain of ۱۴۱.۵dB and ۳-dB frequency bandwidth of ۲.۴kHz at ۶۰dB closed-loop configuration. The load capacitance is set to be ۵pF. The proposed structure also delivers high CMRR and PSRR values of ۱۴۸.۳dB and ۱۵۳.۷dB, respectively.

کلیدواژه ها:

FVF ، OTA ، low power ، low voltage ، CCII ، preamplifier