Title :
A Sub 1-V Constant Gm– C Switched-Capacitor Current Source
Author :
Gregoire, B. Robert ; Moon, Un-Ku
Author_Institution :
Oregon State Univ., Corvallis, OR
fDate :
3/1/2007 12:00:00 AM
Abstract :
A switched-capacitor bias that provides a constant Gm-C characteristic over process and temperature variation is presented. The bias can be adapted for use with subthreshold circuits, or circuits in strong inversion. It uses eight transistors, five switches, and three capacitors, and performs with supply voltages less than 0.9 V. Theoretical output current is derived, and stability analysis is performed. Simulated results showing an op-amp with very consistent pulse response are presented
Keywords :
constant current sources; operational amplifiers; switched capacitor networks; switches; transistors; 1 V; Gm-C filters; constant transconductance; op-amp; stability analysis; subthreshold circuits; switched-capacitor current source; transistors; Bandwidth; Capacitance; Capacitors; Circuit simulation; Moon; Operational amplifiers; Resistors; Temperature; Transconductance; Voltage; $G_{m}$–$C$ filters; Constant $G_{m}$– $C$; constant transconductance; switched-capacitor current source;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2006.889446
