High performance data tuner for video systems

Details High performance data tuner for video systems High performance data tuner for video systems

1994-05-25

1998-03-24

Peng, John K.

Television

Nonpictorial data packet in television format

Full field

348473, 348731, 348467, H04N 708

Patent

active

057318417

ABSTRACT:
A tuner specifically adapted for recovery of a data signal injected into a video signal and then subsequently transmitted over a television channel or cable is disclosed. The tuner includes an IF local oscillator that is phase locked to the input signal sync pulses and has filters that are designed to pass through only the data bandwidth. In addition, the circuit has a low noise figure of about 1.5 dB and a third order intercept point of +35 dBm.

REFERENCES:
patent: 5178637 (1993-01-01), Naimpally
patent: 5243423 (1993-09-01), DeJean et al.
patent: 5327237 (1994-07-01), Jungo et al.
patent: 5387941 (1995-02-01), Montgomery et al.
patent: 5410360 (1995-04-01), Montgomery
patent: 5461426 (1995-10-01), Limberg et al.
Replay Comments of Wavephore, Inc. before the Federal Communications Commission, received Mar. 28, 1994.
Letter datd Dec. 9, 1993 from David Deeds, WavePhore, Inc., to Roy J. Stewart, Federal Communications Commission with attached Declarations.

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