TH29457A - Stabilized bridged oscillator circuits and methods - Google Patents

Abstract

DC60 (17/04/40) Devices and methods will be revealed for improving the stability of the oscillation frequency. Of the oscillator signal Created by an oscillator circuit, in this invention the quartz resonator will be one arm of the bridge. This generates a bridge signal which changes with the resonator oscillation frequency. The consensus modulator will respond to the signal. Bridge for generating error signals Which will be converted to control signal The control circuit receives a control signal and changes its reactance when the resonator. Stop vibrating at resonant frequency Undisturbed Where the resonator oscillation frequency connected to the control circuit is returned to the resonant frequency, the automatic level control circuit is also included. For controlling the level of absorbency of the signal That stimulates the resonator Devices and methods will be disclosed for improving the stability of the oscillation frequency of the oscillator signal generated by the oscillator circuit in the desired form of this invention. The quartz crystal resonator is one arm of the bridge, which generates a bridge signal, which changes with the resonator's oscillation frequency.The corresponding modulator responds to the bridge signal. For generating error signals Which will be converted to a control signal, the control loop will receive the control signal And change the reactance of It when resonator Eliminate oscillation at the undisturbed resonant frequency, the resonator oscillation frequency connected to the condensing circuit. The regulator will be returned to the resonant frequency. An automatic level control circuit is also included. For control The output level of the signal that excites the resonator.

Claims (1)

1. Oscillator circuits for stabilizing oscillator signals with variable frequency consist of Resonators for operation at various frequencies that include Resonant frequency And has an impedance resonator An isolation bridge circuit built with a resonator as one arm. And there are points one and two Bridge circuits respond to the frequency of Change the resonator to be built at point one as First bridge signal Bridge circuits are built and arranged in In which the phase shift leads or follows the phase of the first bridge signal. By moving the phase t tag: