A low-voltage, low-power current-mode automatic gain control (AGC) for battery-powered equipment

Author

Siripruchyanun, Montree

Author_Institution

Dept. of Teacher Training in Electr. Eng., King Mongkut´´s Inst. of Technol. North Bangkok, Thailand

fYear

2006

fDate

17-19 Jan. 2006

Abstract

In this paper, a current-mode automatic gain control (AGC) is presented. Due to operation in current-mode, the proposed circuit provides a wide frequency response, a low supply voltage, low power consumption and electronic controllability. Thus, it is very suitable for use in portable and battery-powered equipment such as hearing aid instrument and wireless radio device. The proposed AGC consists of current controlled exponential amplifier, current-mode precision rectifier, current-mode low pass filter and current-mode integrator. The performances of the proposed circuit are explored through HSPICE simulation program using BSIM3V3 model from MOSIS, they demonstrate good agreement to the theoretical anticipation. The proposed circuit works at ±1.5 V supply voltage, power consumption is merely 7.12mW.

Keywords

SPICE; amplifiers; automatic gain control; current-mode circuits; integrating circuits; low-pass filters; low-power electronics; rectifiers; 7.12 mW; BSIM3V3 model; HSPICE simulation; MOSIS; battery powered equipment; current controlled exponential amplifier; current mode automatic gain control; current mode integrator; current mode low pass filter; current mode precision rectifier; low power AGC; low voltage AGC; Auditory system; Circuits; Controllability; Energy consumption; Frequency response; Gain control; Instruments; Low voltage; Power supplies; Radiofrequency amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronic Design, Test and Applications, 2006. DELTA 2006. Third IEEE International Workshop on

Print_ISBN

0-7695-2500-8

Type

conf

DOI

10.1109/DELTA.2006.7

Filename

1581249