A high-frequency electronically tunable quadrature oscillator

Author

Verhoeven, C.J.M.

Author_Institution

Dept. of Electr. Eng., Delft Univ. of Technol., Netherlands

Volume

27

Issue

7

fYear

1992

fDate

7/1/1992 12:00:00 AM

Firstpage

1097

Lastpage

1100

Abstract

An architecture composed of mutually regenerative oscillators is introduced. It has been used to design a low-noise high-frequency voltage-controlled oscillator (VCO) capable of producing two output signals in quadrature with essentially identical properties. The phase relation between the quadrature outputs is frequency dependent and extremely stable. A novel way of coupling the regenerative oscillators is suggested in order to improve the frequency stability of the coupled oscillator system. Results obtained from a test chip have verified the viability of the oscillator concept. The oscillator circuit has been realized in a medium-frequency bipolar process. The tuning range extends to 500 MHz. At an oscillation frequency of 200 MHz, measured phase noise was -121 dBc/Hz at 1-MHz distance from the carrier.

Keywords

bipolar integrated circuits; coupled circuits; frequency stability; variable-frequency oscillators; coupled oscillator system; electronically tunable quadrature oscillator; frequency stability; medium-frequency bipolar process; mutually regenerative oscillators; phase noise; phase relation; quadrature outputs; tuning range; voltage-controlled oscillator; Circuit optimization; Circuit stability; Circuit testing; Coupling circuits; Frequency dependence; Frequency measurement; Signal design; Tunable circuits and devices; Tuning; Voltage-controlled oscillators;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.142608

Filename

142608