Designing an ultra low phase noise 4.5 GHz VCO using multiple coupled resonators and MOS devices

Author

Rohde, Ulrich L.

Author_Institution

Synergy Microwave Corp., Paterson, NJ, USA

fYear

2005

Firstpage

395

Lastpage

398

Abstract

This paper shows a 4.5 GHz center frequency push-pull oscillator based on the use of NMOS and PMOS transistors, the use of multiple-coupled resonators as tuned elements, and source RF feedback for improved phase noise. Two MOS transistors are used as varactors. At 5 GHz and 1 MHz offset, the phase noise is -118 dBc/Hz. This paper gives detailed insight into the design procedure of the oscillator, including the device selection.

Keywords

MOSFET circuits; circuit tuning; coupled circuits; feedback oscillators; microwave oscillators; phase noise; strip line resonators; varactors; voltage-controlled oscillators; 4.5 GHz; 5 GHz; NMOS transistors; PMOS transistors; multiple coupled resonators; push-pull oscillator; source RF feedback; tuned elements; ultra low phase noise VCO; varactors; Capacitance; Coupling circuits; Feedback; Frequency; MOS devices; MOSFETs; Phase noise; Spirals; Transconductance; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency integrated Circuits (RFIC) Symposium, 2005. Digest of Papers. 2005 IEEE

ISSN

1529-2517

Print_ISBN

0-7803-8983-2

Type

conf

DOI

10.1109/RFIC.2005.1489823

Filename

1489823

Link To Document

https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1588884