DC-to-5-GHz variable gain amplifier for high speed DSO

Author

Yu-Lee Yen ; Chien-Nan Kuo ; Ching-Feng Lee ; Chen, Kevin

Author_Institution

Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

fYear

2015

fDate

27-29 April 2015

Firstpage

1

Lastpage

4

Abstract

This paper presents the design of a variable gain amplifier for the frontend circuitry of 5-GHz high-speed digital storage oscilloscopes. The design challenge includes wide bandwidth and low distortion over the frequency range from dc to 5 GHz. The Cherry-Hooper amplifier configuration is used to tackle the issue. The designed variable gain covers the specified range from -2 to 38 dB. The gain flatness carries out ripples less than 1 dB. To verify our approach, two versions of the amplifier circuits are fabricated. With four cascaded stages, the maximum gain achieves larger than 40 dB. The circuits are designed in 0.35 μm SiGe technology.

Keywords

amplifiers; digital storage oscilloscopes; integrated circuit design; Cherry-Hooper amplifier configuration; SiGe; SiGe technology; amplifier circuits; frequency 5 GHz; frontend circuitry; gain -2 dB to 38 dB; high-speed digital storage oscilloscopes; size 0.35 mum; variable gain amplifier; Bandwidth; Gain; Gain control; Linearity; Radio frequency; Resistors; Silicon germanium;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Design, Automation and Test (VLSI-DAT), 2015 International Symposium on

Conference_Location

Hsinchu

Type

conf

DOI

10.1109/VLSI-DAT.2015.7114522

Filename

7114522