Title :
High-speed voltage-controlled oscillator with quadrature outputs
Author :
Buchwald, A.W. ; Martin, K.W.
Author_Institution :
California Univ., Los Angeles, CA, USA
Abstract :
A voltage-controlled oscillator topology is described that combines a fully-differential four-stage ring oscillator with a balanced exclusive NOR gate frequency doubler, and provides both inphase and quadrature output signals at twice the ring oscillator frequency. These quadrature signals have a period of only four gate delays, which implies high frequency operation.
Keywords :
digital circuits; network topology; variable-frequency oscillators; balanced exclusive NOR gate; digital output; four-stage ring oscillator; frequency doubler; fully-differential; high frequency operation; high speed VCO; inphase output signals; oscillator topology; quadrature outputs; voltage-controlled oscillator;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19910195
