| Patent Number |
Title Of Patent |
Date Issued |
| 5473390 |
Component to composite video signal converter circuit |
December 5, 1995 |
| A bias source (R7,R8,C24) connected to a summing amplifier (Q1) produces a first DC bias at the amplifier input (emitter) and a second DC bias at the amplifier output (collector). A first circuit node (B) is AC coupled (22) to a luminance signal source (Y1, 18), DC coupled via a first re |
| 4583121 |
Backporch gating pulse generator subject to disabling during vertical sync interval |
April 15, 1986 |
| In a TV receiver, a line-rate gating pulse generator includes a source of line-rate timing pulses of "backporch" timing relative to the horizontal blanking intervals of received TV signals. Normally, the time constant of a capacitor charging circuit, enabled by the leading edge of each t |
| 4581630 |
Constant width burst gate keying pulse generator |
April 8, 1986 |
| A keying pulse generator for a color television burst gate provides a gating pulse in response to horizontal synchronizing pulses when present and in response to horizontal retrace pulses when sync pulses are absent. A timing circuit is provided to maintain a constant width keying pulse |
| 4554577 |
Keyed DC stabilization system with protection from error introduction during vertical sync inter |
November 19, 1985 |
| DC stabilization system for a color TV receiver includes three control loops, each including a keyed comparator for comparing a respectively different one of a set of blue, green and red color signals with a common reference voltage during keying periods determined by line rate keying of |
| 4400733 |
Synchronizing pulse separator |
August 23, 1983 |
| A synchronizing pulse separator providing output having reduced dependence upon the average signal amplitude level of the composite video signal input comprises a low pass filter coupled to the source of composite video signals. The low pass filter removes high frequency noise components |
| 4371891 |
Chrominance signal processor |
February 1, 1983 |
| A frequency selective chrominance signal translating circuit for use in a color television receiver employing a comb filter is disclosed. The comb filter responds to switching signals for providing separate outputs from which the luminance and chrominance television signal components are |
| 4316214 |
Keying signal generator with input control for false output immunity |
February 16, 1982 |
| A source of keying signals for use by keyed circuits in a television receiver comprises a keyed transistor, an input coupling circuit including a timing control circuit responsive to video sync signals for timing the operation of the keyed transistor to normally produce keying signals |
| 4313130 |
Keying signal generator with false output immunity |
January 26, 1982 |
| A circuit for generating a composite keying signal comprises a gate pulse generating circuit and a voltage translating network in a television receiver also including keyed video signal processing circuits. The composite keying signal comprises a first pulse developed by the translat |
| 4207590 |
Combined phase shift filter network in a color video signal processing system employing dynamic |
June 10, 1980 |
| A combined phase shift and bandpass filter circuit in a color television receiver including color signal demodulators, and an automatic flesh tone correction network which provides a reference signal for the color demodulators, is disclosed. The circuit comprises an integral bandpass |
