Patent ID: 6653908
Filing Date: 2003-11-25
Classification: H03B,H03L

Abstract:
An apparatus including an oscillator with an oscillation signal amplitude that is automatically controlled for a selectively minimized oscillation signal phase noise, comprising:oscillator circuitry including first and second circuit terminals and an active circuit portion coupled between said first and second circuit terminals that, responsive to an amplitude control signal, generates an oscillator signal between said first and second circuit terminals, wherein said first and second circuit terminals are at first and second DC bias potentials, respectively, and said first DC bias potential is higher than said second DC bias potential; and voltage control circuitry, coupled to said oscillator circuitry, that, responsive to a comparison of a minimum signal voltage at said first circuit terminal and a maximum signal voltage at said second circuit terminal, generates said amplitude control signal such that a difference between said minimum and maximum signal voltages is maintained at a predetermined voltage amplitude.