Cable modem tuner

Details Cable modem tuner Cable modem tuner

2008-04-22

2008-04-22

Kelley, Chris (Department: 2623)

Interactive video distribution systems

Video distribution system with upstream communication

Having link to external network

C370S463000, C331S042000, C331S043000, C375S320000

Reexamination Certificate

active

09782257

ABSTRACT:
An IF input signal corresponding to a selected reception channel is applied through an SAW filter to an IF-AGC circuit, the amplitude of the signal is adjusted to a prescribed level, and the signal is thereafter supplied to a down converter unit. The down converter unit selectively outputs a Low-IF signal provided by down-converting the IF input signal and the High-IF signal amplified without frequency conversion, in accordance with an external instruction. A filter circuit has its cut off frequency selectively set to pass the Low-IF signal only, or both the Low-IF and High-IF signals.

REFERENCES:
patent: 3278866 (1966-10-01), Bose
patent: 4499495 (1985-02-01), Strammello
patent: 5155453 (1992-10-01), Ruetz
patent: 5920236 (1999-07-01), Ishizaki
patent: 6124766 (2000-09-01), Matsuura
patent: 6131023 (2000-10-01), Matsuura
patent: 6160572 (2000-12-01), Matsuura
patent: 7289566 (2007-10-01), Matsuura
patent: 2004/0166799 (2004-08-01), Kral
patent: 0911962 (1999-04-01), None
patent: 0920121 (1999-06-01), None
patent: A5183906 (1993-07-01), None
patent: 6-133318 (1994-05-01), None
patent: A6189220 (1994-07-01), None
patent: A779390 (1995-03-01), None
patent: A8331474 (1996-12-01), None
patent: 9-93152 (1997-04-01), None
patent: 9-181631 (1997-07-01), None
patent: 10-32805 (1998-02-01), None
patent: 10-304261 (1998-11-01), None
patent: 11-127211 (1999-05-01), None
patent: 11-261980 (1999-09-01), None
patent: 2000-151272 (2000-05-01), None
patent: 2001-8179 (2001-01-01), None
Zverev, “Handbook of Filter Synthesis”, published by John Wiley & Sons, Inc. 1967.
Wikipedia Information about Colpitts Oscillator, 2001.
English Translation to Japanese Patent, JP 11127211 A.

Affiliated with

Also associated with

Rating

Cable modem tuner does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cable modem tuner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cable modem tuner will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3935178