Wide Tuning Range Voltage-Controlled Ring Oscillator

Retdian A. NICODIMUS  Shigetaka TAKAGI  Nobuo FUJII  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E86-C   No.6   pp.1085-1088
Publication Date: 2003/06/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Issue on Devices and Circuits for Next Generation Multi-Media Communication Systems)
Category: 
Keyword: 
ring oscillator,  voltage-controlled oscillator,  RC delay,  

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Summary: 
A voltage-controlled ring oscillator with an RC delay as an additional delay to vary the oscillation frequency is proposed. The use of MOS resistors provides a wide range tuning ability from 40 Hz to 366 MHz. The proposed circuit also enables implementation of a low frequency voltage-controlled ring oscillator with relatively smaller devices than the conventional one.