A 40nm CMOS high PSRR differential difference amplifier for sensor applications
Chong, Chean Hwa
Date of Issue2017
School of Electrical and Electronic Engineering
PSRR is becoming increasingly crucial as higher integration demands for noisy digital circuitry to packed closely to sensitive analog blocks. A high PSRR and low power amplifier is needed to drive a resistive 100 kΩ and capacitive 50 pF load over low frequencies as analog surrounding do not react at a high rate. This project has presented a three-stage differential difference amplifier (DDA) with PSRR of -92 dB near DC and -64 dB at 1 kHz. The DDA utilised supply independent biasing circuit for stable current output, a level shift flipped voltage follower (LSFVF) structured low-dropout (LDO) regulator to stabilise the supply voltage and a low pass filter (LPF) to attenuate all AC power supply ripple.
DRNTU::Engineering::Electrical and electronic engineering
Final Year Project (FYP)
Nanyang Technological University