Clock circuit with programmable load capacitors

Details Clock circuit with programmable load capacitors Clock circuit with programmable load capacitors

2008-07-15

2008-07-15

Pascal, Robert J. (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular frequency control means

C331S10800D, C331S185000

Reexamination Certificate

active

07400206

ABSTRACT:
In one embodiment, the present invention includes methods and apparatus for providing initial control values to programmable load capacitors of an oscillator, such as that of a real time clock circuit. Using the initial values, the real time clock circuit may begin operation, enabling additional circuitry within an integrated circuit to begin operation. This additional circuitry may cause operating values to program the load capacitors to provide a desired reference clock based on a given system's requirements.

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patent: WO 00/38338 (2000-06-01), None
patent: WO 02/073562 (2002-09-01), None
U.S. Appl. No. 60/608,966, filed Sep. 30, 2004 entitled “Controlling the Frequency of an Oscillator” by James P. Maligeorgos and Donald A. Kerth.
PCT/US2006/010472 International Search Report with Written Opinion of the International Searching Authority, mailed Nov. 24, 2006.

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