Method and apparatus for setting a voltage controlled...

Details Method and apparatus for setting a voltage controlled... Method and apparatus for setting a voltage controlled...

2005-02-25

2010-06-15

Lee, M. (Department: 2622)

Television

Synchronization

Locking of video or audio to reference timebase

C348S536000, C375S376000

Reexamination Certificate

active

07738039

ABSTRACT:
The present invention concerns a method and apparatus for setting a frequency reference in an integrated receiver decoder (IRD). More specifically, the present invention discloses an electrical circuit arrangement in which the voltage controlled crystal oscillator (VCXO) is set to oscillate at the desired frequency prior to the initial use thereof and that frequency is stored in a non-volatile memory unit. Upon initial use, the IRD receives a data signal corresponding to a frequency reference. The IRD uses a threshold value to compare the frequency reference of the incoming data signal with the frequency stored in the non-volatile memory. If the frequencies differ by a predetermined value, the frequency from the incoming data signal is stored in the non-volatile memory and is used to set the VCXO.

REFERENCES:
patent: 4959715 (1990-09-01), Prodan
patent: 5612981 (1997-03-01), Huizer
patent: 5699392 (1997-12-01), Dokic
patent: 5742191 (1998-04-01), Romesburg et al.
patent: 5920572 (1999-07-01), Washington et al.
patent: 6356871 (2002-03-01), Hemkumar et al.
patent: 2003/0005348 (2003-01-01), Furukawa et al.
patent: 1 324 619 (2003-07-01), None
European Search Report Dated Aug. 29, 2005.

Affiliated with

Also associated with

Rating

Method and apparatus for setting a voltage controlled... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for setting a voltage controlled..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for setting a voltage controlled... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4162686