Bridge-stabilized oscillator circuit and method

Details Bridge-stabilized oscillator circuit and method Bridge-stabilized oscillator circuit and method

H - Electricity

03

L

H03L 7/02 (2006.01) H03B 5/38 (2006.01) H03L 5/00 (2006.01) H03B 1/00 (2006.01)

Patent

CA 2253586

An apparatus and method are disclosed for improving the stability of the frequency of vibration of an oscillator signal produced by an oscillator circuit. In a preferred embodiment of the present invention, a quartz crystal resonator is one arm of a bridge which generates a bridge signal which varies in accordance with the vibrating frequency of the resonator. A synchronous demodulator responds to the bridge signal for producing an error signal. A control circuit receives the error signal and changes its reactance when the resonator is no longer vibrating at its unperturbed resonance frequency so that the vibration frequency of the resonator connected to the control circuit is returned to its resonant frequency. An automatic level control circuit is also included for controlling the drive level of the signal exciting the resonator.

L'invention concerne un appareil et un procédé pour améliorer la stabilité de la fréquence de vibration d'un signal d'oscillateur produit par un circuit oscillateur. Dans un mode préféré de réalisation de la présente invention, un résonateur à cristal de quartz constitue une branche d'un pont qui génère un signal variant en fonction de la fréquence vibratoire du résonateur. Un démodulateur synchrone réagit au signal de pont pour produire un signal d'erreur. Un circuit de commande reçoit ce signal d'erreur et modifie sa réactance lorsque le résonateur ne vibre plus à sa fréquence de résonance non perturbée, de sorte que la fréquence vibratoire du résonateur relié au circuit de commande est rétablie à sa fréquence de résonance. Un circuit de régulation de niveau automatique est également incorporé en vue de réguler le niveau d'excitation du signal excitant le résonateur.

Affiliated with

Also associated with

Rating

Bridge-stabilized oscillator circuit and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bridge-stabilized oscillator circuit and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bridge-stabilized oscillator circuit and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1874823