A transistor video amplifier employs coupling from a collector load potentiometer to an emitter common terminal. The variable arm of the potentiometer is coupled to a peaking capacitor and is further coupled to the emitter electrode through selective networks. At one setting of the potentiometer maximum peaking is obtained by an AC ground provided for the selective networks, and at a second setting the capacitor shunts the collector to depeak the response. The emitter circuit of a transistor vid...

A wide bandwidth, low power dissipation, cascode video output amplifier suitable for driving an in-line gun color picture tube or the like. The cascode amplifier includes a low voltage, small signal, common emitter amplifier transistor and a high voltage common base transistor. An active load circuit comprising a transistor of like conductivity with respect to the common base and common emitter transistors is coupled between the collector of the common base stage and a source of operating voltag...

A high frequency component detector and a limiter or clipper are provided in a video amplifier, detecting a high frequency component in an incoming video signal, responsive to the detection and clipping only the high frequency component in excess of a predetermined voltage.

This invention concerns a circuit arrangement for visually representing a horizontal frequency coupled input signal on the picture screen of a video display device such as a domestic television receiver. This is achieved by comparing the input signal to be represented in visual form with a vertical frequency sawtooth signal, the comparison being effected in such manner that a further signal is produced which identifies the moments when the two compared signals are equal. The further signal is th...

A video data store including at least one storage device containing a plurality of storage elements together with input and output data latches. A queueing control receives write and read store commands and temporarily holds the command if a store cycle is in progress. Timing means receive the write and read commands from the queueing control and produces timing signals required for accessing the storage devices. The store may thus be operated in an asynchronous manner.

A clamp circuit that reduces low frequency noise on a wideband signal such as a video signal by more than 50 dB is disclosed and includes an input amplifier for obtaining a difference signal that is the algebraic summation between an input signal having periodically spaced synchronization pulses and a reference signal. The reference signal is generated by sampled data techniques and includes a means for removing the synchronization pulses from the signal. After passing the synchronization pulse ...

The art of building construction, and more particularly with the design and implementation of a specialized room addition to a typical single family residence wherein the addition contains not only the room construction, but also a suite of entertainment systems integrally constructed therein. The primary system included is a large screen projection television and its associated audio systems. Ancillary entertainment systems are included, as desired by the consumer.

A video clamp for removing a DC offset voltage component from a video signal to simplify video processing circuitry in an image capture data system includes an input signal having an AC data component on a DC offset voltage and a device for periodically accumulating the DC offset voltage. This offset voltage is maintained on the accumulator by a periodic switching device and an apparatus which also reproduces its input DC voltage at its output. The apparatus is electrically biased with a require...

An apparatus and method are provided for transmitting video data over telephone lines. The apparatus is particularly applicable for transmitting and receiving images of persons speaking to each other. In one form, a portable self-contained unit is provided at each end of a conventional telephone circuit wherein the transducers of the mouthpiece and earpiece of each telephone are respectively acoustically coupled to respective acoustic output and input electrical-to-sound and sound-to-electrical ...

A videocassette storage case for accommodating either Beta or VHS type videocassettes. The case has a generally rectangular shape and includes a hinged cover on its top. The interior of the case generally conforms in size to a VHS cassette, and the videocassette is held securely within the case by the hinged cover. An insert having an L-shaped surface may be positioned within the case to define a space which generally conforms in size to a Beta type videocassette. By using the insert, a Beta vid...