Patent ID: 6329884
Filing Date: 2001-12-11
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 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;a third load capacitor connected between an output side of said CMOS inverter and said one power-supply potential; anda fourth load capacitor connected between the output side of said CMOS inverter and said other power-supply potential;said oscillator circuit further comprising said first and third load capacitors and one power supply side of said CMOS inverter coupled to said one power-supply potential via a first current-limiting device, and said second and fourth load capacitors and the other power supply side of said CMOS inverter coupled to the other power-supply potential via a second current-limiting device.