Abstract: A low power oscillator having fast start-up times. The low power fast starting oscillator uses an oscillator circuit having an input and an output for generating a signal of a desired frequency. A start-up detect circuit is coupled to the output of the oscillator circuit for detecting when the oscillator circuit has reached steady state operation and for generating a start-up circuit output signal which adjusts the gain of the oscillator circuit when steady state operation has been reached by the oscillator circuit. A noise generator is coupled to the input of the oscillator circuit and to the start-up detect circuit for inputting a noise pulse into the oscillator circuit. The noise pulse is used for biasing the input of the oscillator circuit to approximately an optimal bias voltage level. The noise generator is further used for sending an enable start-up detect signal to the start-up detect circuit to activate the start-up detect circuit.

Abstract: A fast start-up oscillator has an oscillator for generating a signal having a desired frequency. A prestress biasing circuit is coupled to the oscillator. The prestress biasing circuit is used for prestressing a piezoelectric resonator of the oscillator and for placing a bias voltage on the oscillator after the piezoelectric resonator of the oscillator has been prestressed.