Patent ID: 6191661
Filing Date: 2001-02-20
Classification: H03B

Abstract:
An oscillator circuit comprising:a CMOS inverter having input and output terminals;a piezoelectric device and a feedback resistor each connected between the input and output terminals of said CMOS inverter;a buffer circuit for receiving an output from the CMOS invertor via an AC coupling capacitor;a first load capacitor connected between an input side of said CMOS inverter and one power-supply potential;a second load capacitor connected between the input side of said CMOS inverter and the other power-supply potential; anda third load capacitor connected between an output side of said CMOS inverter and said one power-supply potential;a fourth load capacitor connected between the output side of said CMOS inverter and said other power-supply potential, wherein at least said AC coupling capacitor and said buffer circuit are formed on one chip.