Automatic tuning apparatus for filter and communication...

Details Automatic tuning apparatus for filter and communication... Automatic tuning apparatus for filter and communication...

2008-07-15

2008-07-15

Urban, Edward (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S175100, C455S154100, C455S178100, C333S017100, C333S017300, C333S174000

Reexamination Certificate

active

11007620

ABSTRACT:
An automatic tuning apparatus for a filter includes a mode wherein a switching part is controlled so that a reference signal is inputted to the filter, a plural number of control signals are successively input to a control terminal of the filter, a tentative value of the control signal is determined based on respective amplitudes detected by an amplitude detection part as a “coarse tuning step”, a plural number of control signals are successively input in the vicinity of the tentatively determined value to a control terminal, and the value of the control signal is determined to be used in a mode as a “fine tuning step” based on respective phase differences detected by a phase comparator part”.

REFERENCES:
patent: 4127819 (1978-11-01), Keane
patent: 4395779 (1983-07-01), Fujino et al.
patent: 4539566 (1985-09-01), Sharpe et al.
patent: 5179727 (1993-01-01), Imagawa
patent: 5369793 (1994-11-01), Vincent
patent: 5438304 (1995-08-01), Jennings
patent: 5499396 (1996-03-01), Reime
patent: 6058148 (2000-05-01), Whikehart et al.
patent: 6122496 (2000-09-01), Yoshioka
patent: 6178314 (2001-01-01), Whikehart et al.
patent: 6307443 (2001-10-01), Gabara
patent: 6983136 (2006-01-01), Mason et al.
patent: 2004/0246056 (2004-12-01), Behzad et al.
patent: 09083294 (1997-03-01), None

Affiliated with

Also associated with

Rating

Automatic tuning apparatus for filter and communication... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic tuning apparatus for filter and communication..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic tuning apparatus for filter and communication... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3955617