Title :
Gain and slew rate enhancement for amplifiers through current starving and feeding
Author :
Shi Bu ; Hing Wa Tse ; Ka Nang Leung ; Jianping Guo ; Ho, Marco
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Hong Kong, China
Abstract :
A gain and slew rate enhancement technique for amplifiers, based on starving current in static state and feeding excessive current during slewing, is proposed in this paper. Demonstrated in a current-mirror amplifier using a standard 0.18-μm CMOS process, the dc gain is boosted by 15 dB, and the slew rate is enhanced by over 600% compared with a conventional current mirror amplifier and 1100% compared with a current-starved amplifier. In the meanwhile, static power consumption is reduced by more than 2/3 without sacrificing unity-gain frequency, output swing or stability. The total power dissipation is only 63.4 μW under 1.8 V supply.
Keywords :
CMOS integrated circuits; current mirrors; CMOS process; current-mirror amplifier; gain enhancement; power 63.4 muW; size 0.18 mum; slew rate enhancement; static power consumption; voltage 1.8 V; Feeds; Gain; Mirrors; Modulation; Power demand; Regulators; Transistors;
Conference_Titel :
Circuits and Systems (ISCAS), 2015 IEEE International Symposium on
Conference_Location :
Lisbon
DOI :
10.1109/ISCAS.2015.7169086
