Title :
Transconductance enhancement method for operational transconductance amplifiers
Author :
Li, Y.L. ; Han, K.F. ; Tan, Xiaobo ; Yan, N. ; Min, Hwang-Ki
Author_Institution :
State Key Lab. of ASIC & Syst., Fudan Univ., Shanghai, China
Abstract :
An improved recycling structure for an operational transconductance amplifier is proposed. The proposed structure separates the AC path from the DC path, and achieves a significant boost in transconductance under the same power and area budget. A folded-cascode amplifier employing the improved recycling structure was implemented in SMIC standard 0.13 m CMOS process. Simulation results show that the enhancement of transconductance leads to 230 improvement in gain-bandwidth product and 13 dB boost in gain compared with the conventional folded cascode.
Keywords :
CMOS integrated circuits; operational amplifiers; CMOS process; folded-cascode amplifier; operational transconductance amplifier; recycling structure; size 0.13 micron; transconductance enhancement;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2010.1575
