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| Number | Title | Issue Date |
| 5237398 | Color difference signal matrix and buffer circuit for television apparatus Two transistors are operated individually as emitter follower buffer amplifiers for R-Y and B-Y input signals and are operated together as an inverting summing matrix for deriving a G-Y output signal from the R-Y and B-Y input signals. All three output si... | 08/17/1993 |
| 4868892 | Tuning system with provisions for calculating the local oscillator frequency from an aft characteristic A television tuning system includes control apparatus for changing the frequency of a local oscillator signal during a search and a comparator arrangement for determining when an AFT signal traverses first and second threshold values corresponding to firs... | 09/19/1989 |
| 4866780 | Loudspeaker unit A frame for a loudspeaker unit used, for example, in a television receiver, has provisions for optionally fastening one type of loudspeaker to the frame by a positively-locking fastening arrangement or another type of loudspeaker by screw fastening. Speci... | 09/12/1989 |
| 4866434 | Multi-brand universal remote control A multi-brand universal remote control handunit stores compressed device control codes to make efficient use of the available memory space. In addition to storing data pointers to pairs of pulse off and pulse burst components of a transmission, the memory... | 09/12/1989 |
| 4862271 | Video signal interpolator with peaking In a video signal expanding/compressing system including a video signal interpolator, video signals are peaked prior to interpolation. The amount of peaking is controlled in response to a signal representative of the distance between a pixel of an expande... | 08/29/1989 |
| 4855811 | Apparatus for processing auxiliary information in an extended definition widescreen television system An NTSC compatible, single broadcast channel, widescreen EDTV system encodes and decodes a television signal comprising: (1) a main, standard formal NTSC signal component with low frequency side panel image information compressed into the overscan regions... | 08/08/1989 |
| 4855730 | Component audio/video system with timed control of plural peripheral devices A component audio/video system includes a system controller having an input/output port adapted for connection via a bidirectional data bus to a plurality of peripheral audio/video devices. At times determined by a system master clock the controller trans... | 08/08/1989 |
| 4855824 | Compatible television system with companding of auxiliary signal encoding information An NTSC compatible, single channel widescreen EDTV system encodes and decodes a television signal comprising (1) a main, standard format NTSC signal wth auxiliary low frequency side panel image information compressed into an overscan region thereof; (2) a... | 08/08/1989 |
| 4851798 | Unitary tuning structure A unitary tuning structure of a UHF tuner includes an inductance loop, an inductance adjustment element attached to a top portion of the inductance loop so as to be foldable with respect to the inductance loop about an axis parallel to the printed circuit... | 07/25/1989 |
| 4837627 | Programmable operating-parameter control appatatus for a television receiver A programmable auxiliary control unit for a television receiver has switch selectable features which enable it the receiver to interface more easily to a variety of signal sources, by controlling the operating parameters of the television receiver. The co... | 06/06/1989 |
| 4823387 | Television tuning system with provisions for tuning RF signals with scrambled video information A tuning system for tuning non-standard frequency RF signals which utilizes searches for non-standard RF signals by examining both a synchronization component and an AFT signal at each of a successive number of search frequencies. If the AFT signal indica... | 04/18/1989 |
| 4816899 | Compatible widescreen television system A widescreen television signal having left side, right side and center panel information is converted into a signal compatible with a standard television system, such as NTSC. In the compatible signal, center panel information is expanded to occupy the st... | 03/28/1989 |
| 4808992 | Component audio/video system with automatic turn-off of peripheral devices A component audio/video system includes a system controller coupled to supply selection and control commands to a plurality of peripheral audio/video devices and to receive status messages therefrom. The devices may be selected to form a number of differe... | 02/28/1989 |
| 4802114 | Programmable remote control transmitter A programmable remote control transmitter receives, in a learning mode, remote control codes for remote-controlling various devices and remote-controls the devices according to the received remote control codes by emulating their respective transmitters. ... | 01/31/1989 |
| 4799107 | Auxiliary gain control apparatus for a television receiver In a television receiver, an output signal from a binary rate multiplier (BRM) is used to control the amplitude of a video signal and thereby the contrast of a displayed image. Contrast control in response to ambient lighting conditions is accomplished by... | 01/17/1989 |
| 4796019 | Input device for a display system The invention relates to a display system using a remote control transmitter handunit having both a "pointing function" capability for moving a cursor displayed on a display screen by changing the angular position of the remote control handunit, and the c... | 01/03/1989 |
| 4792990 | Audio amplifier with programmed volume control In a programmed audio amplifier system, the volume setting when the system is turned on is conditionally related to the last volume setting, i.e., immediately before the amplifier was turned off. At turn-on the system remains at the last volume setting as... | 12/20/1988 |
| 4790030 | Tuner with insertable antenna coupler Antenna coupling components including a coil and a static discharge resistor are mounted on a separate printed circuit board within a tuner that is positioned by means of projecting tabs on each end so as to self-center the coil with the inductor. A first... | 12/06/1988 |
| 4783849 | FET tuner The RF stage and local oscillator stage of a tuner both include respective cascode connected dual gate field effect transistors as the amplifying device and similarly configured tuned circuits coupled to the first gate electrodes of the field effect trans... | 11/08/1988 |
| 4782383 | Apparatus for processing high frequency edge information in a widescreen television system In a system for encoding a widescreen video signal containing left side, right side and center panel image components and luminance (Y) and chrominance (I,Q) information, first and second encoded signals containing side panel high frequency components ("h... | 11/01/1988 |
| 4775842 | Multi-output feedback amplifier A feedback amplifier for providing an amplified signal to first and second utilization networks includes first and second feedback paths. The amplifier output is coupled via a first coupling resistor to a first terminal to which the first utilization netw... | 10/04/1988 |
| 4776038 | Automatic air/cable mode selection apparatus for a television tuner A television receiver cable of tuning either "air" channels in an "air" tuning mode or "cable" channels in a "cable" tuning mode includes apparatus for automatically selecting the tuning mode. The auto-tuning mode apparatus operates in conjunction with ap... | 10/04/1988 |
| 4769708 | Manual and automatic ambient light sensitive picture control for a television receiver In a television receiver, a contrast control signal for controlling the amplitude of a video signal is a function of a manual contrast control component provided by a viewer, and an automatic contrast control component provided by a light sensitive circui... | 09/06/1988 |
| 4769703 | Apparatus for aligning an image display device in a video signal processing and display system Apparatus to permit service adjustment of a television receiver includes a microprocessor which normally controls parameters of a video signal processed by the receiver. The microprocessor also automatically establishes a desired video signal reference co... | 09/06/1988 |
| 4769643 | Transmitter driver for programmable remote control transmitter A transmitter driver of this invention is applied to a programmable remote control transmitter for receiving remote control codes for remote-controlling various electric devices in the learning mode and for remote-controlling the electric devices accordin... | 09/06/1988 |
| 4769714 | Noise and arc suppression filter for a display driver stage A low pass filter is placed between an input pre-driver amplifier and an output driver amplifier of a display driver stage, e.g., forming a cascode amplifier. The filter suppresses noise components present in the signal from the pre-driver to prevent the ... | 09/06/1988 |
| 4763195 | Television tuning system with provisions for quickly locating active cable channels A tuning system for tuning non-standard frequency RF television signals provided by cable distribution networks and television accessories conducts first and second consecutive searches by changing the local oscillator frequency. The first search is limit... | 08/09/1988 |
| 4761687 | Automatic gain control delay circuit for a video signal processor In an automatic gain control (AGC) network in a video signal processing system, a comparator responds to an input control signal for providing an output control signal to an RF tuner amplifier for decreasing its gain below a normal maximum level when the ... | 08/02/1988 |
| 4760597 | Technician set-up unit for and method of cable television converter installation and address assignment A technician set-up unit is described for cable television converter installation and address assignment, and a method for using the unit with an addressable television converter. The set-up unit and method permits address assignments to be made in a conv... | 07/26/1988 |
| 4760391 | Tri-state on-screen display system An on-screen character display system includes a tri-state character generator for generating a tri-state character signal having black portions corresponding to the leading and trailing edging portions of the character and a white portion corresponding t... | 07/26/1988 |
| 4755822 | Antenna mounting A low cost antenna mount is disclosed for mechanically securing an antenna to an electronic device and simultaneously providing assurance of good electrical contact with the input circuitry of the device. An antenna base (1) with a machined groove (2) is ... | 07/05/1988 |
| 4749889 | Temperature compensation apparatus A so-called "VBE multiplier" circuit is used to temperature compensate a semiconductor device with respect to both short term self-heating effects and long term ambient temperature effects. The compensation circuit includes a transistor with a ... | 06/07/1988 |
| 4746919 | Remote control system with key function display provisions A transmitter unit of a remote control system includes a key function display unit for identifying the function of key elements of the transmitter unit at various steps of a control sequence for one or more controlled devices. The memory for storing chara... | 05/24/1988 |
| 4743866 | Wide range oscillator A local oscillator is arranged in a Colpitts type configuration in which an amplifying device such as a bipolar transistor or field effect transistor having a control electrode (base or gate electrode) is coupled to a first electrode (emitter or source el... | 05/10/1988 |
| 4742249 | RF switch with diode network and control latch sharing common element A diode network includes a series branch coupled between two signal ports and a shunt branch coupled between a node in the series branch and ground and connected in parallel with a transistor of a latching circuit that is further coupled to supply forward... | 05/03/1988 |
| 4739193 | Drive circuit with limited signal transition rate for RFI reduction An amplifier applies turn-on bias to the gate electrode of an output field-effect transistor in response to a first level of an input signal applied to the amplifier. A switched power source supplies operating current to the amplifier for developing the t... | 04/19/1988 |
| 4737993 | Cable broadcast TV receiver with automatic channel search responsive to mode change A "cable-ready" receiver includes a controller for selecting broadcast ("air") and cable channels tuned by a tuner. When switching between air and cable tuning modes the controller stores the number of the channel tuned in the previous mode and retunes th... | 04/12/1988 |
| 4737720 | DTMF generation using pre-summed tables A technique for generating predefined dual tone, multiple frequency signals composed of two non-harmonically related frequency components according to industry standards is disclosed. The frequencies of each tone pair are adjusted within a predetermined t... | 04/12/1988 |
| 4731656 | Solid state imager with transfer smear suppression for moving and stationary images A field transfer imager is erased after every field transfer, prior to a new field of pixels-descriptive charge packet being accumulated in the successive charge transfer stages of the charge transfer channels of the image register. The image register is ... | 03/15/1988 |
| 4730215 | Compatible wide screen television system with variable image compression/expansion A compressor compresses the edges of a wide screen image to provide a compressed wide screen video signal which may be displayed on a conventional 4:3 aspect ratio receiver with the compressed edge portions largely hidden from view because of receiver ove... | 03/08/1988 |
