Patent ID: 7579920

Claim:
An oscillator circuit comprising: a first negative transconductance circuit comprising: a first control input adapted to receive a first control signal; a second control input adapted to receive a second control signal; a first common input adapted to receive a first current signal; a first output adapted to provide a first output signal based on the first control signal and the first current signal; and a second output adapted to provide a second output signal based on the second control signal and the first current signal; a resonance circuit coupled between the first output and the second output and having a resonant frequency, such that the first output and the second output present a negative transconductance to the resonance circuit; and a first current source and direct current (DC) bias circuit: comprising: DC bias circuitry having a DC bias output adapted to provide a DC bias signal based on a first DC reference signal and a second DC reference signal; a first low side limiting and bias circuit coupled between the DC bias output and the first control input; and a second low side limiting and bias circuit coupled between the DC bias output and the second control input; and adapted to: provide the first control signal based on the second output signal and the DC bias signal; provide the second control signal based on the first output signal and the DC bias signal; and provide the first current signal based on the first DC reference signal and at least one of a group consisting of the first control signal and the second control signal.