Patent ID: 6768388
Filing Date: 2004-07-27
Classification: H03K

Abstract:
A voltage-controlled piezoelectric oscillator, comprising:an inverter having an input and output; a feedback resistor connected between said input and output; a first capacitor inserted between said input and a ground potential; a second capacitor inserted between said output and said ground potential; a series circuit which is composed of a piezoelectric vibrator, two variable-voltage capacitance elements, and a third capacitor, each of said variable-voltage capacitance elements having a first terminal and a second terminal, said first terminals being connected to each other; a control terminal for applying a control voltage by way of a resistor to a common connection point of said first terminals of said variable-voltage capacitance elements; and a return resistors inserted between said second terminal of each of said variable-voltage capacitance elements and said ground potential.