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| Number | Title | Issue Date |
| 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 |
| 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 |
| 4839728 | Picture-in-picture video signal generator A picture-in-picture video signal generator includes a source of an auxiliary video signal, and a producer of successive samples representing the auxiliary video signals. A self-sequencing memory includes a data input terminal coupled to the producer of a... | 06/13/1989 |
| 4823100 | Deflection distortion correction device A deflection yoke field modifying device corrects N-S pincushion distortion without increasing A-zone convergence errors. The device may be of the form of a ferrite ring which is located near the electron beam exit end of the deflection yoke. The ring may... | 04/18/1989 |
| 4823302 | Block oriented random access memory able to perform a data read, a data write and a data refresh operation in one block-access time A video memory system which uses dynamic digital data storage elements allows random access to blocks of 32 pixel values. The pixel values to be stored in a block are applied sequentially to the memory system and the pixel values provided by the memory sy... | 04/18/1989 |
| 4821226 | Dual port video memory system having a bit-serial address input port A dual port digital memory system, which includes integral memory sequencing circuitry, is controlled by a bit-serial address and control signal. The address and control signal, which includes a data read address, a data write address and a control value,... | 04/11/1989 |
| 4821122 | TV receiver with automatic RF/baseband signal A receiver includes a video switch operated by a controller for selecting antenna or auxiliary (baseband) video signals for display. When placed in a "VCR" operating mode the controller first selects the auxiliary input for display. If a video signal is n... | 04/11/1989 |
| 4816913 | Pixel interpolation circuitry as for a video signal processor A processor for expanding a compressed video signal includes a pixel interpolator which interpolates between input pixel values in two dimensions. This interpolator calculates and stores intermediate pixel values which are interpolated in the vertical dir... | 03/28/1989 |
| 4814879 | Signal phase alignment circuitry Circuitry for aligning the transition of a clock signal to transitions of a horizontal line synchronizing signal includes a series of delay elements which provide a plurality of clock signal phases. The longest phase delay provided by this circuitry is gr... | 03/21/1989 |
| 4814860 | Television picture zoom system having chroma phase restoration circuit In a TV receiver having a zoom system, the chroma signal is vertically and horizontally expanded by repeating the successive lines and pixels. The polarity of the vertically and horizontally chroma signal is selectively inverted in a manner restoring the ... | 03/21/1989 |
| 4811103 | Interlace inversion corrector for a picture-in-picture video signal generator A picture-in-picture video signal generator includes a source of an auxiliary video signal, and a producer of successive samples representing the auxiliary video signal. A self-sequencing memory includes a data input terminal coupled to the producer of au... | 03/07/1989 |
| 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 |
| 4803647 | Sampled data audio tone control apparatus A sampled data tone control circuit is implemented using a two pole canonic recursive/non-recursive filter. The filter is programmed with predetermined sets of sample weighting coefficients to selectively cut or boost either the base or treble band of fre... | 02/07/1989 |
| 4802000 | Video switching apparatus having interference prevention feature A Y/C selector switch is coupled to receive a first pair of internally-separated component signals Y1, C1 in addition to a second and a third pair of externally-supplied wideband component signals Y2, C2 and Y | 01/31/1989 |
| 4802009 | Digitally controlled phase locked loop system A phase locked loop system for generating a line-locked clock signal for a television signal processing system includes an analog phase-locked loop nested within a digital phase locked loop. The analog phase-locked loop is synchronized to a reference sign... | 01/31/1989 |
| 4796079 | Chip component providing rf suppression A ferrite shield component for suppressing high frequency signals in electrical circuits, such as tuners for television receivers, is formed by surrounding an electrical conductor with ferrite material. The shield component is formed in the shape of a lea... | 01/03/1989 |
| 4791594 | Random-access psuedo random number generator A system for generating a series of psuedo random numbers so that numbers in the sequence may be randomly accessed. The system includes apparatus for scrambling the bits of a plurality of seed numbers. The pattern of bit scrambling is governed by the cont... | 12/13/1988 |
| 4787056 | Apparatus for estimating the square of digital samples Apparatus for estimating the square of a multi-bit digital sample having a value (A+B) segments the sample into a most significantf bit (MSB) portion having the value A, and a least significant bit (LSB) portion having a value B. The LSB portion is added ... | 11/22/1988 |
| 4786963 | Adaptive Y/C separation apparatus for TV signals An adaptive luma/chroma separation apparatus is herein disclosed. Means, including delay elements and bandpass filters, are employed to generate a set of three bandpassed signals Bb, Mb and Tb, which are delayed with respe... | 11/22/1988 |
| 4785352 | Sampled data amplitude detector as for an AGC multiplier A sampled data signal amplitude detector for use in PLL's, for example, includes an absolute value detector to generate the magnitudes of the signal samples to be measured. The magnitudes of pairs of successive samples are compared and the larger magnitud... | 11/15/1988 |
| 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 |
| 4783756 | Sampled data tone control system A sampled data treble control system, requiring a single multiplier element, includes the cascade connection of a first adder, the multiplier, and a second adder coupled between the system input and output terminals. A subtracter develops the differences ... | 11/08/1988 |
| 4783698 | Interpolator for compressed video data A simplified-in-structure vertical interpolator for compressed video data down-loaded from image memory to an odd-line line storage memory and an even-line line storage memory is followed in cascade by a horizontal interpolator. The horizontal interpolato... | 11/08/1988 |
| 4782389 | Adaptive M-tile sample producer Apparatus is disclosed for adaptively producing a sample having a desired M-tile value, and includes a source of a set of input samples and a source of a control signal. Means are provided for adaptively masking or replacing a subset of the input samples ... | 11/01/1988 |
| 4777851 | Automatic fastener attachment system A three-stage system movable in three orthogonal directions includes a pair of cam rods and a screw insertion device secured to one of the stages for displacement in three orthogonal directions. A cabinet has a screw receiving aperture pedestal with apert... | 10/18/1988 |
| 4777385 | Signal transient improvement circuit A transition enhancing circuit includes a tapped delay line which provides successively delayed replicas of the signal to be processed. A multiplexer, responsive to a signal transition, sequentially couples delayed signal from the center tap and taps more... | 10/11/1988 |
| 4777481 | Display processor for image data with non-constant pixel size for chromatic values The invention is embodied in a system comprising image memory and a display processor that automatically processes video data which alternate between having chrominance pixels of greater area than luminance pixels and having chrominance pixels of the same... | 10/11/1988 |
| 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 |
| 4774686 | Serial digital signal processing circuitry A serial-bit digital processing system uses registers and latches to synchronize samples and justify sign-bits. Nominally each processing block in the system includes a sign extend register preceding an arithmetic element and an output register following ... | 09/27/1988 |
| 4767949 | Multibit digital threshold comparator A multibit digital threshold comparator is disclosed which comprises a source of a multibit digital input signal representing a signed arithmetic value, and a source of a threshold signal. Means are provided for producing a magnitude representative signal... | 08/30/1988 |
| 4764967 | Tone control system for sampled data signals A sampled data tone control system, applicable for providing audio bass cut and boost control, includes a single variable multiplying circuit for determining the system variable response characteristics. Input samples are coupled to the multiplier which h... | 08/16/1988 |
| 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 |
| 4760489 | Video display degaussing apparatus A degaussing apparatus for a video display includes a degaussing coil and a source of degaussing current. A switching means is coupled to the degaussing coil and to the source for providing a path for degaussing current between the source and coil during ... | 07/26/1988 |
| 4760457 | Self-fixtured kinescope A pair of locating washers are applied over the holes in the bottom mounting lugs of the kinescope. The washers have apertures which are precisely referenced with respect to the position of the kinescope screen by using a pair of oppositely-disposed scree... | 07/26/1988 |
| 4760602 | Variable preemphasis/deemphasis network A variable preemphasis/deemphasis network is disclosed which is coupled between audio input and output terminals. The network exhibits a family of transfer function response characteristics which vary between a full deemphasis characteristic H(f) and a fu... | 07/26/1988 |
| 4757467 | Apparatus for estimating the square root of digital samples Circuitry for calculating the square root of a binary number iterates the equation E(K+1)=E(K)+(S-E(K)2) where E(K+1) is the current estimate of the square root of the sample S and E(K) is the previous estimate. The value E(K)2 is es... | 07/12/1988 |
| 4751580 | Television receiver standby power supply In a standby power supply for a television receiver, a rectifier arrangement, electrically nonisolated from a source of AC mains supply voltage, develops a first, nonisolated direct voltage that is present during both the on-state and the standby state of... | 06/14/1988 |
| 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 |
| 4739495 | Solid-state imager defect corrector A defect corrector for a solid-state imager having a number of defective pixels less than the total number of pixels in the imager in which only defect correction signals associated with the defective pixels are generated. The defect correction signals ar... | 04/19/1988 |
