Title :
Linear-in-dB Variable Gain Amplifier with PWL exponential gain control
Author :
Moro-Frías, D. ; Sanz-Pascual, M.T. ; de la Cruz-Bias, C.A.
Author_Institution :
Electron. Dept., INAOE, Puebla, Mexico
fDate :
May 30 2010-June 2 2010
Abstract :
A Variable Gain Amplifier (VGA) based on the Gilbert Cell is presented in this paper. A Piecewise-Linear (PWL) circuit is employed to obtain a gain variation linear in dB. The PWL block is based on multiple cascaded simple current mirrors. The VGA was designed in a 0.35μm CMOS process with 3 V supply. The circuit presents 1.7V output swing, 33 dB gain variation (from 2.7 to 35.6 dB) and a bandwidth of 800 KHz.
Keywords :
CMOS analogue integrated circuits; current mirrors; integrated circuit design; piecewise linear techniques; CMOS; Gilbert cell; PWL; bandwidth 800 kHz; current mirrors; exponential gain control; gain 2.7 dB to 35.6 dB; linear-in-dB variable gain amplifier; piecewise-linear circuit; size 0.35 mum; voltage 1.7 V; voltage 3 V; Bandwidth; CMOS process; CMOS technology; Feedback circuits; Gain control; MOSFETs; Mirrors; Piecewise linear approximation; Piecewise linear techniques; Tactile sensors;
Conference_Titel :
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5308-5
Electronic_ISBN :
978-1-4244-5309-2
DOI :
10.1109/ISCAS.2010.5536984
