Title :
Single Miller capacitor compensated multistage amplifiers for low dropout regulator
Author :
Jinwen, Yang ; Quanyuan, Feng
Author_Institution :
Inst. of Microelectron., Southwest Jiaotong Univ., Chengdu, China
Abstract :
A high performance CMOS two-stage operational amplifier with high open loop, high PSRR and nested Miller frequency compensation is presented on the basis of the analysis of traditional circuits. With the normal loads, an open-loop gain (Av) of 87dB, a unity gain bandwidth (GB) of 12MHz, a phase margin ( O ) of 63°, and a power supply rejection ratio (PSRR) 72.6dB have been achieved for a VDD of 3V.
Keywords :
CMOS analogue integrated circuits; compensation; operational amplifiers; voltage regulators; 12 MHz; 3 V; 87 dB; CMOS two-stage operational amplifier; Miller capacitor compensation; low dropout regulator; multistage amplifiers; nested Miller frequency compensation; Capacitors; Circuits; Differential amplifiers; Frequency; Operational amplifiers; Poles and zeros; Regulators; Resistors; Transconductance; Voltage;
Conference_Titel :
Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings
Print_ISBN :
0-7803-9433-X
DOI :
10.1109/APMC.2005.1607108
