Patent ID: 6967540
Filing Date: 2005-11-22
Classification: H03B

Abstract:
1. A synthesizer incorporating voltage tunable capacitors, comprising: at least one resonator coupled into a base circuit of a bipolar transistor, said at least one resonator including at least one voltage tunable capacitor; said bipolar transistor including a collector which terminates in a radial micro strip stub and an emitter which produces an output via an impedance matching circuit, a buffer amplifier and an RF filter, a frequency divider, programmable phase locked loop and loop filter receiving said output of said RF filter and providing an input to a controller; an integral switch mode power supply providing power to said base circuit via a first power supply filter, and said controller via a second power supply filter; and said controller scales a user-selected control voltage range to levels required by said at least one voltage tunable capacitors associated with said at least one resonator.