Oscillating apparatus

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing

Reexamination Certificate

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Details

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.

REFERENCES:
patent: 5404250 (1995-04-01), Hase et al.
patent: 6163184 (2000-12-01), Larsson
patent: 6163187 (2000-12-01), Sano
patent: 6229362 (2001-05-01), Choi
patent: 6859108 (2005-02-01), Abbasi et al.
patent: 7459964 (2008-12-01), Dosho et al.
patent: 02-041026 (1990-02-01), None
patent: 04-081018 (1992-03-01), None
patent: 04-262618 (1992-09-01), None
patent: 10-190455 (1998-07-01), None
patent: 2005-252438 (2005-09-01), None

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