A new design approach for variable-gain low noise amplifiers

Author

Pennisi, S. ; Scaccianoce, S. ; Palmisano, G.

Author_Institution

STMicroelectron., Catania, Italy

fYear

2000

fDate

10-13 June 2000

Firstpage

139

Lastpage

142

Abstract

A new approach to the design of variable-gain low noise amplifiers is presented in which input and output signals can be switched among circuit branches with different features. It can be arranged for high linearity performance and/or different frequency shapes. Moreover, it allows matching conditions for multi-band applications to be met. As a design example, a 900 MHz three-gain level low noise amplifier was designed in a 20 GHz bipolar technology. The circuit exhibits a maximum gain and a noise figure of 26 dB and 2.1 dB, respectively and provides accurate input and output matching.

Keywords

UHF amplifiers; UHF integrated circuits; bipolar analogue integrated circuits; impedance matching; integrated circuit design; integrated circuit noise; 2.1 dB; 20 GHz; 26 dB; 900 MHz; bipolar technology; circuit branches; high linearity performance; input matching; low noise amplifiers; matching conditions; multi-band applications; output matching; variable-gain LNA design; Circuit noise; Frequency; Linearity; Low-noise amplifiers; Multi-stage noise shaping; Noise figure; Noise level; Shape; Signal design; Switching circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency Integrated Circuits (RFIC) Symposium, 2000. Digest of Papers. 2000 IEEE

Conference_Location

Boston, MA, USA

ISSN

1529-2517

Print_ISBN

0-7803-6280-2

Type

conf

DOI

10.1109/RFIC.2000.854434

Filename

854434