Injection Locked Oscillator Automatic Frequency Centering Method And Apparatus

Ron D. Katznelson, Broadband Innovations, Inc.
Brani A. Petrovic, Broadband Innovations, Inc.

Abstract

An apparatus for centering the frequency of an injection locked oscillator (ILO) measures the difference of the phase (or a parameter related to the phase) between ILO output signals in response to alternate high level and low level RF drive signals, and can tune the center frequency of the ILO in accordance with the measurements to minimize the phase difference