Gigahertz-band high-gain low-noise AGC amplifiers in fine-line NMOS

Author

Jindal, Renuka P.

Volume

22

Issue

4

fYear

1987

fDate

8/1/1987 12:00:00 AM

Firstpage

512

Lastpage

521

Abstract

The design and test results of a single-chip NMOS automatic gain control (AGC) amplifier are described. The amplifier has a maximum flat gain of 50 dB, dynamic range of 70 dB, and a noise figure of 11 dB. The flat response from near DC to a 3-dB bandwidth of 1 GHz does not require tuning of any peaking circuits. The chip is also capable of operating at 3 GHz with unity gain delivering -8 dBm into a 50-Ω load. The global feedback scheme designed for this chip stabilizes it against large shifts in threshold voltage and ambient temperature variation of 170°C. This feedback scheme can provide stable DC feedback for a forward amplifier gain of at least 60 dB. Application of this application in the design of low-noise high-speed fibre-optic systems is envisaged.

Keywords

Automatic gain control; Feedback; Field effect integrated circuits; Optical communication equipment; Pulse amplifiers; automatic gain control; feedback; field effect integrated circuits; optical communication equipment; pulse amplifiers; Automatic testing; Bandwidth; Circuit optimization; Dynamic range; Feedback; Gain control; Low-noise amplifiers; MOS devices; Noise figure; Threshold voltage;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.1987.1052765

Filename

1052765