Oscillators – Automatic frequency stabilization using a phase or frequency... – Amplitude compensation
Reexamination Certificate
2009-02-17
2010-12-21
Chang, Joseph (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Amplitude compensation
C331S109000, C331S160000, C331S182000, C331S183000
Reexamination Certificate
active
07855606
ABSTRACT:
An oscillator device having an oscillation system including an oscillator and a resilient supporting member, a driving member configured to supply a driving force to the oscillation system based on a driving signal, a detecting member configured to detect at least an oscillation amplitude of the oscillator, a driving amplitude control unit configured to control at least a driving amplitude of the driving signal, and a driving frequency control unit configured to control a driving frequency of the driving signal to be supplied to the driving member, wherein, in a state in which the driving amplitude control unit controls the driving amplitude of a driving signal so that the oscillation amplitude to be detected becomes equal to a target value, and on the basis of information including driving frequencies in different driving states being driven with driving signals of these driving frequencies as well as the controlled driving amplitude, the driving frequency control unit acquires, as a resonance frequency of the oscillation system, a driving frequency with which the driving amplitude of the driving signal becomes minimal.
REFERENCES:
patent: 6569109 (2003-05-01), Sakurai et al.
patent: 6838661 (2005-01-01), Klement
patent: 7085030 (2006-08-01), Sakai
patent: 7446921 (2008-11-01), Suzuki et al.
patent: 4-301727 (1992-10-01), None
patent: 2005-241482 (2005-09-01), None
patent: 2005-292627 (2005-10-01), None
Canon Kabushiki Kaisha
Chang Joseph
Fitzpatrick ,Cella, Harper & Scinto
Shin Jeffrey
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