Oscillators – Automatic frequency stabilization using a phase or frequency... – Tuning compensation
Reexamination Certificate
2011-01-25
2011-01-25
Kinkead, Arnold (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Tuning compensation
C331S034000, C331S175000, C331S185000
Reexamination Certificate
active
07876163
ABSTRACT:
To set a best oscillation state of a voltage-controlled oscillator (VCO) circuit, it is necessary to evaluate variability of manufactured ICs to specify set values based on the variability. Provided is an oscillator including: a terminal receiving a first signal; a VCO coupled to the terminal, the VCO oscillating to generate a second signal and to change a frequency of the second signal in response to an amplitude of the first signal, and revealing gain-slope characteristics in the frequency of the second signal versus the amplitude of the first signal; and a control circuit coupled to the VCO to alter the gain-slope characteristics in response to the amplitude of the first signal, the VCO having so-called self regulating characteristics in which the VCO is locked up based on the variability of the manufactured ICs without depending on external control.
REFERENCES:
patent: 7616067 (2009-11-01), Matsumoto et al.
patent: 7646253 (2010-01-01), Kwan et al.
patent: 7659782 (2010-02-01), Cong
patent: 06-152401 (1996-01-01), None
Kinkead Arnold
McGinn IP Law Group PLLC
Renesas Electronics Corporation
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