Patent ID: 7046096

Claim:
An oscillator circuit comprising: a plurality of amplifiers, which also function as impedance buffers; a first phase-shift circuit connected between the amplifiers, the first phase-shift circuit being capable of adjusting the phase of an oscillator loop; a feedback circuit, an input side of the feedback circuit being connected to an output terminal of the amplifier that is connected to an output side of the first phase-shift circuit, an output side of the feedback circuit being connected to an input terminal of the amplifier that is connected to an input side of the first phase-shift circuit; a second phase-shift circuit provided in the feedback circuit, the second phase-shift circuit being capable of adjusting the phase and gain of the oscillator loop; and a piezoelectric vibrator provided in the feedback circuit, wherein the second phase-shift circuit and the piezoelectric vibrator are connected in series with each other.