Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-05-17
1993-04-06
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
3581951, 455315, 455316, H04N 544, H04B 126
Patent
active
052008266
ABSTRACT:
A TV signal receiving system, in order to tune a broadcasting frequency of a desired channel after receiving a TV signal, converts the TV signal into an intermediate frequency having a frequency higher than the maximum frequency in a TV broadcasting frequency band and then converts again the frequency of the signal into another intermediate frequency in conventional TV systems so as to improve the rejection characteristics of image and IF signals. The system comprises a first converter for tracking a desired channel frequency from a TV RF signal and converting the frequency into a first IF of 2 GHz, a band-pass filter of the 2 GHz IF for filtering only the first IF frequency signal in the first converter, and a second converter for converting the filtered first IF into 45 MHz of the conventional TV IF.
REFERENCES:
patent: 4340975 (1982-07-01), Onishi
patent: 4581643 (1986-08-01), Carlson
patent: 5010400 (1991-04-01), Oto
patent: 5014350 (1991-05-01), Nezu
Bushnell Robert E.
Chin Tommy P.
Samsung Electronics Co,. Ltd.
LandOfFree
TV signal receiving double conversion television tuner system ha does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with TV signal receiving double conversion television tuner system ha, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and TV signal receiving double conversion television tuner system ha will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-540555