CMOS VCO and LNA Using Tuned-Input Tuned-Output Circuits

Author

Shekhar, Sudip ; Walling, Jeffery S. ; Aniruddhan, Sankaran ; Allstot, David J.

Author_Institution

Univ. of Washington, Seattle

Volume

43

Issue

5

fYear

2008

fDate

5/1/2008 12:00:00 AM

Firstpage

1177

Lastpage

1186

Abstract

A tuned-input tuned-output (TITO) VCO utilizes two resonant-tanks to achieve a low measured phase noise of 130.5 dBc/Hz @ 1 MHz offset from 2.5 GHz center frequency. Improvement in phase noise is achieved with comparable power consumption and tuning range compared to a cross-coupled VCO topology. A TITO cell similar to that in the VCO is used as a common-source amplifier in a current-reuse configuration cascaded with a -boosted common-gate amplifier to realize a high gain (20 dB), low power (2.7 mW) LNA. A technique to improve the linearity of the current-reuse LNA is also presented.

Keywords

CMOS analogue integrated circuits; low noise amplifiers; voltage-controlled oscillators; CMOS VCO; low noise amplifier; tuned-input tuned-output circuit; Circuit optimization; Energy consumption; Frequency measurement; High power amplifiers; Noise measurement; Phase measurement; Phase noise; Resonance; Tuned circuits; Voltage-controlled oscillators; Current reuse; TITO; linearity; low-noise amplifier; noise figure; phase noise; tuned-input tuned-output; voltage-controlled oscillator;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2008.920360

Filename

4494670