Title :
Fast-Settling Feedforward Automatic Gain Control Based on a New Gain Control Approach
Author :
Xin Cheng ; Guangjun Xie ; Zhang Zhang ; Yizhong Yang
Author_Institution :
Sch. of Electron. Sci. & Appl. Phys., Hefei Univ. of Technol., Hefei, China
Abstract :
This brief presents a feedforward automatic gain control (AGC) circuit with a short settling time. The proposed AGC combines a digital coarse gain setting and an analog fine gain setting, in which the fine gain setting is carried out by a one-step algorithm, which shortens the settling time drastically. The chip is fabricated in 0.13-μm CMOS technology and the measurement results show that the 48-dB AGC converges to the desired level within 1.2 μs.
Keywords :
CMOS integrated circuits; feedforward; gain control; CMOS technology; analog fine gain setting; digital coarse gain setting; fast settling feedforward automatic gain control; one step algorithm; short settling time; size 0.13 mum; Automatic generation control; CMOS integrated circuits; Detectors; Electronics packaging; Gain; Gain control; Receivers; Automatic gain control (AGC); fast-settling; feedforward; variable gain amplifier (VGA);
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2014.2331097
