A Low-Voltage Low-Power CMOS Weak Inversion Log Domain Auto Gain Control Module

Author

Han, Dong ; Zheng, Yuanjin

Author_Institution

Inst. of Microelectron., Singapore

fYear

2007

fDate

26-28 Sept. 2007

Firstpage

485

Lastpage

488

Abstract

This paper presents a novel scheme for low voltage low power (LVLP) log domain auto gain control (AGC) system. The AGC principle is based on proportionally biasing a CMOS weak inversion log compressor with the input signal strength. Due to the log domain processing, this AGC achieves a large dynamic range reduction (DRR) under low voltage and low power. Simulated results at 1-V supply voltage for 0.18-mum CMOS process validate the principle. The total quiescent drain current of the AGC core is 0.3 muA. The AGC bandwidth is 1 KHz. It is suitable for LVLP bio-medical application such as electrocardiogram (ECG) signal adapting.

Keywords

CMOS integrated circuits; automatic gain control; bandwidth allocation; low-power electronics; signal processing; AGC bandwidth; CMOS weak inversion log compressor; auto gain control module; biomedical application; dynamic range reduction; electrocardiogram signal adapting; input signal strength; log domain processing; low-voltage low-power CMOS weak inversion log domain; quiescent drain current; supply voltage; Biomedical signal processing; Bipolar transistors; CMOS process; Dynamic range; Frequency; Gain control; Integrated circuit modeling; Low voltage; MOSFETs; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Integrated Circuits, 2007. ISIC '07. International Symposium on

Conference_Location

Singapore

Print_ISBN

978-1-4244-0797-2

Electronic_ISBN

978-1-4244-0797-2

Type

conf

DOI

10.1109/ISICIR.2007.4441904

Filename

4441904