A new high-performance OPA based VCO for microwave applications

Author

Ulansky, V.V. ; Kolesnik, A.A. ; Elsherif, H.M.

Author_Institution

Dept. of Electron., Nat. Aviation Univ., Kiev, Ukraine

fYear

2014

fDate

23-25 Sept. 2014

Firstpage

50

Lastpage

53

Abstract

This paper describes a novel operational amplifier (OPA) voltage-controlled oscillator (VCO) for microwave applications. The VCO circuit is based on a wideband OPA unity gain buffer and can be used in frequency range exceeding the unity gain bandwidth. The mathematical model of the proposed VCO is developed. The designed VCO uses an ultra low noise wideband OPA LMH6624 and covers the frequency band between 1.955 GHz and 2.673 GHz, exhibits a maximum in-band phase noise of - 154.2 dBc/Hz at 1 MHz offset from carrier frequency. Power consumption of the VCO core is 57 mW from a ± 2.5 V power supply. The designed VCO achieves one of the best figure of merit value of - 204dBc/Hz at 2 - GHz band. The implemented oscillator generates low-noise signal confirming the simulation results.

Keywords

UHF oscillators; microwave oscillators; operational amplifiers; phase noise; voltage-controlled oscillators; carrier frequency; frequency 1.955 GHz to 2.673 GHz; high-performance OPA based VCO; mathematical model; maximum in-band phase noise; microwave applications; operational amplifier; power 57 mW; power consumption; ultra low noise wideband OP LMH6624; voltage 2.5 V; voltage-controlled oscillator; wideband OPA unity gain buffer; Bandwidth; Integrated circuits; Microwave amplifiers; RNA; Topology; Voltage control; Voltage-controlled oscillators; figure of merit; operational amplifier; oscillator; phase-noise; power consumption; slew rate; varactor;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwaves, Radar and Remote Sensing Symposium (MRRS), 2014 IEEE

Conference_Location

Kiev

Print_ISBN

978-1-4799-6072-9

Type

conf

DOI

10.1109/MRRS.2014.6956663

Filename

6956663