Title :
Class-AB large-swing CMOS buffer amplifier with controlled bias current
Author :
Joongsik Kih ; Deog-Kyoon Jeong
Author_Institution :
Dept. of Electron. Eng., Seoul Nat. Univ.
fDate :
12/1/1993 12:00:00 AM
Abstract :
A class-AB large swing CMOS buffer amplifier with new error amplifier circuits is presented. The error amplifier accurately controls the quiescent current through the output transistors, thereby reducing the variation of the quiescent power dissipation due to process and temperature variations. The buffer amplifier fabricated using 1.2-μm CMOS technology occupies an area of 103 mil2 and dissipates an average of 4.7 mW under the quiescent condition with the standard deviation of only 3.2% of the average value. It has -63.6 dB THD with 3.5 Vpp output swing into a 300 Ω/150 pF load at 5 kHz
Keywords :
CMOS integrated circuits; audio-frequency amplifiers; buffer circuits; differential amplifiers; linear integrated circuits; 1.2 micron; 1.2-μm CMOS technology; 4.7 mW; 5 kHz; THD; class-AB large swing CMOS buffer amplifier; controlled bias current; error amplifier circuits; output swing; quiescent current; quiescent power dissipation; standard deviation; CMOS technology; Circuits; Differential amplifiers; Error correction; MOSFETs; Power amplifiers; Power dissipation; Telephony; Temperature control; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
