A fast CMOS voltage-controlled ring oscillator

Author

Savaria, Yvon ; Chtchvyrkov, Dmitri ; Currie, John F.

Author_Institution

Electr. Eng. Dept., Ecole Polytech., Montreal, Que., Canada

Volume

4

fYear

1994

fDate

30 May-2 Jun 1994

Firstpage

359

Abstract

A voltage-controlled ring oscillator based on variable capacitive loading is described. A prototype, fabricated in a 1.2 μm CMOS-technology, has been tested. The results showed that it is capable to operate at a maximum frequency of 560 MHz. This design operates at 92% of the speed achievable by the same ring oscillator, but where the speed control circuits have been removed. An important feature of this oscillator is its tunability range, which goes from 277 to 560 MHz, or a factor of 2.0 between f_max and f_min. This paper presents the simulations performed to optimize the performance of the circuit

Keywords

CMOS analogue integrated circuits; circuit tuning; voltage-controlled oscillators; 1.2 micron; 277 to 560 MHz; fast CMOS ring VCO; high-speed operation; tunability range; variable capacitive loading; voltage-controlled ring oscillator; Added delay; CMOS technology; Circuits; Clocks; Frequency synchronization; MOS devices; Phase locked loops; Prototypes; Ring oscillators; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on

Conference_Location

London

Print_ISBN

0-7803-1915-X

Type

conf

DOI

10.1109/ISCAS.1994.409271

Filename

409271