Title :
A digitally programmable VGA [variable gain amplifier]
Author :
Sanz, M. Teresa ; Calvo, Belén ; Celma, Santiago ; Morán, Carlos
Author_Institution :
Grupo de Diseno Electronico, Zaragoza Univ., Spain
Abstract :
This paper presents a digitally programmable MOST-only variable gain amplifier (VGA) built around a high-performance fully-differential operational amplifier with gain enhancement. Digital controllability is based on an inherent linear MOST-only current division technique. The system, built in 0.8 μm CMOS technology and supplied at 3.3 V, achieves gains between -34 dB and 54 dB with linearity better than -80 dB
Keywords :
CMOS integrated circuits; differential amplifiers; feedback amplifiers; mixed analogue-digital integrated circuits; operational amplifiers; programmable circuits; -34 to 54 dB; 0.8 micron; 3.3 V; CMOS technology; MOST-only amplifier; common mode feedback control; digitally programmable amplifier; folded cascode op amp; fully-differential operational amplifier; gain enhancement; gain-boosting opamp; high-performance fully-differential opamp; linear current division technique; mixed-signal circuits; variable gain amplifier; Boosting; CMOS technology; Circuits; Controllability; Digital control; Digital signal processing; Frequency response; Gain; Operational amplifiers; Voltage;
Conference_Titel :
Circuits and Systems, 2001. MWSCAS 2001. Proceedings of the 44th IEEE 2001 Midwest Symposium on
Conference_Location :
Dayton, OH
Print_ISBN :
0-7803-7150-X
DOI :
10.1109/MWSCAS.2001.986263
