Title:
SYSTEM AND METHOD FOR MAINTAINING AN ACCURATE FREQUENCY ON A VOLTAGE CONTROLLED OSCILLATOR
Document Type and Number:
WIPO Patent Application WO2004032597
Kind Code:
A3
Abstract:
A method for phase-locking a voltage controlled oscillator (210) is disclosed. The method comprises receiving, at a phase detector (202), a phase input signal (216) and a phase feedback signal (213) from the voltage controlled oscillator (210); measuring (204) a pulse width property of an error signal (218) output from the phase detector (202) to obtain a pulse width property measurement; storing the pulse width property measurement in a memory (220); and generating (214) a new signal (226) from the stored pulse width property measurement to phase-lock the voltage controlled oscillator (210). The method of the present invention may be used to calibrate a clock, in clock holdover and in qualification of clock sources.
Inventors:
SKERRITT MICHAEL (US)
Application Number:
PCT/US2003/032158
Publication Date:
December 23, 2004
Filing Date:
October 09, 2003
Export Citation:
Assignee:
ACORN PACKET SOLUTIONS LLC (US)
SKERRITT MICHAEL (US)
SKERRITT MICHAEL (US)
International Classes:
H03L7/08; H03L7/085; H03L7/10; H03L7/14; H03L7/18; (IPC1-7): H03L7/08; H03L7/14
Foreign References:
| US3883817A | 1975-05-13 |
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