Title :
Transconductance with capacitances feedback compensation for multistage amplifiers
Author :
Peng, Xiaohong ; Sansen, Willy
Author_Institution :
ESAT-MICAS, Katholieke Univ. Leuven, Leuven-Heverlee, Belgium
Abstract :
A new performance-boosting frequency compensation technique is presented in this paper, named transconductance with capacitances feedback compensation (TCFC). A transconductance stage and two capacitors introduce negative feedback to a three-stage amplifier, which significantly improves performances such as gain-bandwidth product, slew rate, stability and sensitivity. A TCFC amplifier, with optimized circuits structure, has been implemented, and fabricated in a 0.35 μm CMOS process. The TCFC amplifier, driving a 150 pF load capacitor, achieved 2.9 MHz gain-bandwidth product, dissipating only 45 μW power with a 1.5 V supply, which shows a significant improvement on multistage amplifiers.
Keywords :
CMOS analogue integrated circuits; UHF amplifiers; circuit stability; error compensation; feedback amplifiers; low-power electronics; 0.35 micron; 1.5 V; 150 pF; 45 muW; CMOS; TCFC; amplifier load capacitor; capacitive feedback compensation; frequency compensation; gain-bandwidth product; multistage amplifiers; negative feedback; sensitivity; slew rate; stability; transconductance; Capacitance; Capacitors; Circuits; Frequency; Negative feedback; Operational amplifiers; Power amplifiers; Stability; Topology; Transconductance;
Conference_Titel :
Solid-State Circuits Conference, 2004. ESSCIRC 2004. Proceeding of the 30th European
Print_ISBN :
0-7803-8480-6
DOI :
10.1109/ESSCIR.2004.1356638
