Patent ID: 6690244
Filing Date: 2004-02-10
Classification: H03B

Abstract:
A variable frequency oscillator circuit comprising a resonator circuit part and an amplifier circuit part, the resonator circuit part having a first and a second end, the resonator circuit part comprising:a: a parallel connected inductor-capacitance pair, the amplifier circuit part comprising; b: first and second transistors having a collector, base, and emitter, where c: the collector of the first transistor is connected to the first end of the resonator circuit part, while the collector of the second transistor is connected to the second end of the resonator circuit part, d: the base of the first transistor is cross-connected to the second end of the resonator circuit part and to the collector of the second transistor, and the base of the second transistor is cross-connected to the first end of the resonator circuit part and to the collector of the first transistor, the amplifier circuit part further comprising; e: a first impedance matching element connected between the base of the second transistor and the first end of the resonator circuit part, and a second impedance matching element connected between the base of the first transistor and the second end of the resonator circuit part.