Title :
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
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;
Conference_Titel :
Electronic Design, Test and Applications, 2006. DELTA 2006. Third IEEE International Workshop on
Print_ISBN :
0-7695-2500-8
DOI :
10.1109/DELTA.2006.7
