CRYSTAL OSCILLATOR CIRCUIT HAVING LOW POWER CONSUMPTION, LOW JITTER AND WIDE OPERATING RANGE

摘要

A crystal oscillator circuit includes: a crystal resonator circuit, generating an oscillation signal; an inverting amplification circuit, whose first amplifier input end is coupled to receive the oscillation signal, in which an inverting amplifier outputs an inverting amplified output signal; a bias circuit, having a bias circuit input end and a bias circuit output end, in which the bias circuit output end generates a bias circuit output signal controlled by the bias circuit input end, and the bias circuit output signal is coupled to a second amplifier input end; and a peak detection circuit, comparing the inverting amplified output signal with a reference signal, regulating a peak detector output signal, and feeding the peak detector output signal into the bias circuit input end, in which the bias circuit includes a self-adjusting circuit, for isolating a power supply from a second input end of the inverting amplifier.

主权项

1. A crystal oscillator circuit, comprising:
a crystal resonator circuit, generating an oscillation signal having a predetermined oscillation frequency; an inverting amplification circuit, having a first amplifier input end, a second amplifier input end and an inverting amplifier output end, the first amplifier input end being coupled to an oscillator and receiving the oscillation signal, wherein an inverting amplifier outputs an inverting amplified output signal; a bias circuit, having a bias circuit input end and a bias circuit output end, wherein the bias circuit output end generates a bias circuit output signal controlled by the bias circuit input end, and the bias circuit output signal is coupled to the second amplifier input end; and a peak detection circuit, comparing the inverting amplified output signal with a reference signal, regulating a peak detector output signal, and feeding the peak detector output signal into the bias circuit input end, wherein the bias circuit comprises a self-adjusting circuit, for isolating a power supply from a second input end of the inverting amplifier.