Oscillators – Automatic frequency stabilization using a phase or frequency... – Tuning compensation
Reexamination Certificate
2011-07-12
2011-07-12
Kinkead, Arnold (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Tuning compensation
C331S017000, C331S034000, C331S17700V, C331S00100A, C331S111000, C331S143000
Reexamination Certificate
active
07978013
ABSTRACT:
A constant determination unit (90) determines various constants, that are the magnitude of a charge current outputted from a charge pump circuit (30), the time constant of a loop filter (40), and the gain of a voltage controlled oscillator (50), so as to make the proportionality constant of a natural frequency of a phase locked loop circuit for the input frequency of the phase locked loop circuit and the damping factor to be predetermined values, and outputs various control signals based on the determined constants. The charge pump circuit (30), the loop filter (40), and the voltage controlled oscillator (50) modify the magnitude of the charge current, the time constant, and the gain, respectively, in accordance with control signals outputted from the constant determination unit (90).
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Japanese Notice of Reasons for Rejection, w/ English translation thereof, issued in Japanese Patent Application No. JP 2007-551861 dated Sep. 7, 2010.
Dosho Shiro
Sogawa Kazuaki
Yamada Yuji
Yanagisawa Naoshi
Kinkead Arnold
McDermott Will & Emery LLP
Panasonic Corporation
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