Title :
A compact low-power linear-in-dB CMOS AGC
Author :
Kui Zhang ; Sheng-Xu Wang ; Jun-Yu Shi ; Yong Liu ; Li-Ming Si ; Xin Lv
Author_Institution :
Dept. of Electron. Eng., Beijing Inst. of Technol., Beijing, China
Abstract :
This paper presents a low-power and compact automatic gain control circuit which consumes only 1.3 mW and occupies only 0.008 mm2 fabricated in TSMC 0.18-μm CMOS technology. The core of the proposed AGC is a variable gain amplifier (VGA) implemented by Gilbert cells and an exponential function circuit for dB linearity of gain control. The dynamic range of the AGC is from -10 dB to 50 dB. The operation frequency is only 10 MHz, but the AGC maintains 3 dB bandwidth wider than 35 MHz throughout its gain range. The constant time of the AGC loop is 5 μs.
Keywords :
CMOS integrated circuits; amplifiers; automatic gain control; low-power electronics; Gilbert cells; TSMC CMOS technology; VGA; compact automatic gain control circuit; exponential function circuit; gain -10 dB to 50 dB; low-power automatic gain control circuit; power 1.3 mW; size 0.008 mm; size 0.18 mum; time 5 mus; variable gain amplifier; Abstracts; CMOS integrated circuits; Gain control; Mobile communication; Multiaccess communication; Spread spectrum communication;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2014 12th IEEE International Conference on
Conference_Location :
Guilin
Print_ISBN :
978-1-4799-3296-2
DOI :
10.1109/ICSICT.2014.7021473
