Patent ID: 7545229

Claim:
A voltage controlled oscillator, comprising: a transistor having a base, collector and emitter; a bias and temperature compensation network including an inductor connected in series with a first resistor between the base and collector of the transistor and a second resistor connected between the first resistor and the inductor; a feedback capacitor connected to the base of the transistor; a resistor operative to reduce thermal drift of the oscillator connected across the feedback capacitor and the emitter of the transistor; a two stage regenerative filter coupled to the emitter; and a resonator capacitively connected to the base of the transistor; wherein the absolute values of the first and second resistors are such that a select amount of phase noise is fed into the base of the transistor, the select amount of phase noise being out of phase with phase noise at the emitter; and wherein the two stage regenerative filter includes a first LC filter inductively coupled to a second RC filter.