Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Reexamination Certificate
2007-07-11
2009-10-20
Cox, Cassandra (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
C327S148000
Reexamination Certificate
active
07605621
ABSTRACT:
An oscillating apparatus is provided that includes: a filter circuit that includes a capacitor and outputs a control signal based on an amount of charge accumulated in the capacitor; an oscillator that outputs an oscillation signal of a frequency that is based on the control signal; a phase comparator that compares the oscillation signal with a reference signal of a predetermined frequency, to detect a phase difference between the oscillation signal and the reference signal; a switch circuit that controls whether to charge the capacitor according to a predetermined charge current or to discharge the capacitor according to a predetermined discharge current, based on the phase difference; and a current stabilizing current that defines each of the charge current and the discharge current based on a predetermined reference current or a reference voltage.
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Kimura Hiroki
Miyaji Yuichi
Advantest Corporation
Cox Cassandra
Osha • Liang LLP
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