An Inductorless CMOS 0.1-1GHz Automatic Gain Control Circuit

Author

Park, Hangue ; Lee, Sungho ; Nam, Sangwook

Author_Institution

Telecommun. R&D Center, Samsung Electron. Co. Ltd., Suwon

fYear

2008

fDate

27-31 Oct. 2008

Firstpage

456

Lastpage

459

Abstract

This paper presents an inductorless 0.1-1 GHz automatic gain control (AGC) circuit comprised of a variable gain amplifier (VGA), power detector (PD), and comparator. The VGA has a gain control range of -28~23 dB with a 1 GHz 3-dB gain bandwidth using a cascode amplifier with negative capacitance. The PD shows an input power range of -30~20 dBm using an improved unbalanced source coupled pair, which incorporates an output differential amplifier and sink current steering. The AGC circuit produces constant output power for an input power range of -48 dBm~8 dBm over 0.1~1 GHz without an inductor. The overall current consumption is 7.7 mA under 1.5 V supply. The prototype is fabricated with a 0.18-mum standard CMOS technology.

Keywords

CMOS integrated circuits; automatic gain control; comparators (circuits); differential amplifiers; CMOS technology; VGA; comparator; differential amplifier; frequency 0.1 GHz to 1 GHz; gain -28 dB to 23 dB; gain bandwidth; inductorless CMOS automatic gain control circuit; power detector; sink current steering; size 0.18 mum; source coupled pair; variable gain amplifier; Bandwidth; CMOS technology; Capacitance; Coupling circuits; Detectors; Differential amplifiers; Gain control; Inductors; Power amplifiers; Power generation;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2008. EuMC 2008. 38th European

Conference_Location

Amsterdam

Print_ISBN

978-2-87487-006-4

Type

conf

DOI

10.1109/EUMC.2008.4751487

Filename

4751487