An HBT MMIC wideband VCO

Author

Adar, A. ; Ramachandran, R.

Author_Institution

Pacific Monolithics, Sunnyvale, CA, USA

fYear

1991

fDate

10-14 July 1991

Firstpage

247

Abstract

A wideband monolithic microwave integrated circuit (MMIC) voltage controlled oscillator (VCO) has been developed using AlGaAs/GaAs heterojunction bipolar transistors (HBTs). Test results indicate a very wide tuning range of 7 to 15 GHz, with a minimum output power of 9 dBm. This MMIC also exhibits low power dissipation (5 V and 25 mA) and excellent phase noise (75 dBc/Hz at 100 kHz) for a broadband VCO. In addition to the basic oscillator, this MMIC includes a buffer amplifier to provide better load isolation and power output stability. All the required biasing and matching circuitry except for the resonator is contained within the chip, which measures 30 mil*40 mil (0.8 mm*1 mm).<>

Keywords

III-V semiconductors; MMIC; aluminium compounds; bipolar integrated circuits; gallium arsenide; heterojunction bipolar transistors; microwave oscillators; variable-frequency oscillators; 7 to 15 GHz; AlGaAs-GaAs; MMIC; buffer amplifier; heterojunction bipolar transistors; load isolation; matching circuitry; minimum output power; monolithic microwave integrated circuit; phase noise; power dissipation; power output stability; tuning range; voltage controlled oscillator; Bipolar integrated circuits; Circuit testing; Gallium arsenide; Heterojunction bipolar transistors; MMICs; Microwave integrated circuits; Monolithic integrated circuits; Power amplifiers; Voltage-controlled oscillators; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1991., IEEE MTT-S International

Conference_Location

Boston, MA, USA

ISSN

0149-645X

Print_ISBN

0-87942-591-1

Type

conf

DOI

10.1109/MWSYM.1991.146974

Filename

146974