A 125 MHz-86 dB IM3 programmable-gain amplifier

Author

Cheng-Chung Hsu ; Jieh-Tsorng Wu

Author_Institution

Dept. of Electron. Eng., Nat. Chiao-Tung Univ., Hsin-Chu, Taiwan

fYear

2002

fDate

13-15 June 2002

Firstpage

32

Lastpage

35

Abstract

A digitally programmable-gain amplifier (PGA) is realized using a 0.35 /spl mu/m CMOS technology. Constant bandwidth and high linearity are achieved by using a current-mode amplifier with resistor-network feedback. The PGA has a voltage gain varying from 0 dB to 19 dB with a bandwidth of 125 MHz. With 1 Vpp output, the third-order intermodulation (IM3) of the PGA is -86 dB at 10 MHz and -59 dB at 80 MHz. The distortion is also insensitive to the gain change. The circuit dissipates 21 mW from a 3.3 V supply.

Keywords

CMOS analogue integrated circuits; current-mode circuits; feedback amplifiers; gain control; programmable circuits; wideband amplifiers; 0 to 19 dB; 0.35 micron; 125 MHz; 21 mW; 3.3 V; CMOS technology; constant bandwidth; current-mode amplifier; digitally programmable-gain amplifier; high linearity; resistor-network feedback; voltage gain variation; Artificial intelligence; Bandwidth; CMOS technology; Circuits; Electronics packaging; Feedback; Linearity; Operational amplifiers; Resistors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Circuits Digest of Technical Papers, 2002. Symposium on

Conference_Location

Honolulu, HI, USA

Print_ISBN

0-7803-7310-3

Type

conf

DOI

10.1109/VLSIC.2002.1015035

Filename

1015035