Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1974-11-18
1976-06-29
Griffin, Robert L.
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 950
Patent
active
039673120
ABSTRACT:
A silicon monolithic integrated circuit comprising a DC biasing network and three sets of full wave, synchronous, gated, transistor demodulators to demodulate the red, blue and green color different signals which are present in a composite television signal. The DC biasing network includes; a voltage regulator for providing a direct current voltage independent of variations in the magnitude of a power supply voltage the variations may be caused by voltage transients or varients in the temperature of the monolithic chip, and a direct current bias amplifier connected to the voltage regulator for providing a zero differential temperature coefficient direct current bias voltage to the outputs of the three sets of demodulators. Also disclosed is a blanking amplifier to facilitate direct current restoring at each of the outputs of the demodulators, the blanking amplifier being responsive to a blanking input signal. As a result, variations in the direct current voltage level at the output of the demodulators are severely attenuated. Moreover, a background adjust which is suitable for use with new unitized gun cathode ray tubes is disclosed whereby the TV manufacturer is allowed to perform the background adjustment or gray scale tracking adjustment. Furthermore, the chroma demodulator circuit includes three sets of demodulators for direct demodulating of the three color signals in place of a matrix for demodulation of the green difference signal.
REFERENCES:
patent: 3513256 (1970-05-01), Bilotti
patent: 3595989 (1971-07-01), Hoke, Jr.
patent: 3624275 (1971-11-01), Lunn
Bingham Michael D.
Griffin Robert L.
Motorola Inc.
Saffian Mitchell
Weiss Harry M.
LandOfFree
Color television chroma demodulator circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Color television chroma demodulator circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color television chroma demodulator circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1282445