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| Number | Title | Issue Date |
| 4791632 | Compensated laser diode transmitter A compensated laser diode transmitter for high speed data transmission is provided with a pair of current switches, a novel current summing circuit and a novel current sink. The power output of the laser is sensed in real data time and employed to generat... | 12/13/1988 |
| 4791390 | MSE variable step adaptive filter A very rapidly converging adaptive filter which uses a variable scale factor for each weight of the filter. The value of the variable scale factor is chosen for each iteration and is based upon the sign changes of the incremental weight change. The variab... | 12/13/1988 |
| 4791559 | High-speed instruction control for vector processors with remapping An instruction flow control system includes an instruction buffer for receiving stored program instructions. A program address generator signals the instruction buffer for fetching the instructions. A translate RAM decodes the fetched instructions and a t... | 12/13/1988 |
| 4772890 | Multi-band planar antenna array A planar array of radiating elements which includes a plurality of radiating elements which are capable of operating upon electromagnetic signals of different frequency bands in a single planar array.... | 09/20/1988 |
| 4756627 | Optical temperature sensor using photoelastic waveguides An integrated-optic waveguide apparatus uses a photoelastic substrate for sensing temperature changes. Optical channels are formed in a photoelastic crystal substrate by depositing film stripes thereon to cause stress-induced changes in the relative refra... | 07/12/1988 |
| 4750631 | Anti-slosh apparatus for liquid containers In order to avoid the sloshing of liquid within a container caused by movement of the container, the single bulk volume of the liquid is retained in the form of a plurality of separated mini-volumes. This is accomplished by providing a chamber formed by u... | 06/14/1988 |
| 4734909 | Versatile interconnection bus A bus arbitration system comprising a plurality of bus lines and a clock which produces first and second phrases in which a drive generates a first logic state during the first phase to precharge the capacitance associated with the bus lines and generates... | 03/29/1988 |
| 4726025 | Generation and diagnostic verification of complex timing cycles A timing generator and verifier is provided in which a PROM stores the timing constants that are employed by the generator. An address counter, which is driven by a clock timer, cycles through an associated portion of the PROM to provide a sequence of out... | 02/16/1988 |
| 4723242 | Digital adaptive voting A digital system employing adaptive voting circuitry to improve its fault-tolerance receives an input data bit from each of a number of input data sources. The adaptive voting circuitry has a separate section for each of the input devices which has a weig... | 02/02/1988 |
| 4722596 | Acousto-optic analyzer with dynamic signal compression An acousto-optic spectrum analyzer in which the dynamic range is effectively extended by detecting the frequency bands wherein the photo-detectors are saturated and providing a filter to suppress those frequencies. With this pre-filter, the entire spectru... | 02/02/1988 |
| 4714837 | High speed flip-flop A high speed, edge-triggered, set/reset flip-flop of relatively simple circuit configuration which operates on small, narrow pulses.... | 12/22/1987 |
| 4713742 | Dual-inductor buck switching converter A DC-to-DC power converter is constructed by coupling two parallel-connected inductors in series with a DC input power source. A communication switch is connected in series of each of the inductors. One terminal of each of these switches is connected to o... | 12/15/1987 |
| 4712059 | Broadband optical processor for determination of frequency and time of arrival of multiple signals A real time, optical processor for the detection and separation of multiple frequency hop signals and which is capable of determining both the frequency and the time of arrival for all frequencies within a specified bandwidth.... | 12/08/1987 |
| 4712024 | Active balum star mixer A mixer circuit wherein transistors are used to drive Schottky diodes in a star configuration in order to avoid the disadvantages of transformer coupling.... | 12/08/1987 |
| 4696061 | Acousto-optic R-F receiver which is tunable and has adjustable bandwidth There is disclosed an acousto-optic filtering apparatus which includes Bragg cells in the signal path and in the local oscillator reference path of the apparatus in order to permit relatively high frequency signals to be detected by a relatively low frequ... | 09/22/1987 |
| 4692899 | Propagational control for Vertical Bloch Line memories Stabilization of the propagation of storage bits around the storage loops of a Vertical Bloch Line (VBL) memory is obtained by the vapor-deposition of a nickel-iron film over the VBL structure. The film has a composition range of 65-90% nickel and a thick... | 09/08/1987 |
| 4691973 | Superconducting connector A superconducting pin and socket conductor is formed with a cylindrical pin of superconducting material, such as niobium, which fits into a mating superconducting cylinder, such as niobium or titanium, which is open at the top. A superconducting wire is l... | 09/08/1987 |
| 4691303 | Refresh system for multi-bank semiconductor memory Refresh signals for a multiple semiconductor MOS bank memory are implemented with a refresh counter that supplies 15.6 microseconds refresh pulses so that one row of 128 row of memory bank, or of each of a group of memory banks, may be refreshed on a sequ... | 09/01/1987 |
| 4691126 | Redundant synchronous clock system A synchronous clock circuit is provided on each module of an electronic digital system formed of a plurality of modules. Each clock circuit has two control pins which are used by control logic to determine whether or not the clock on a particular module i... | 09/01/1987 |
| 4689559 | Apparatus and method to reduce the thermal response of SQUID sensors A SQUID, nominally of the "hybrid" type, wherein the normally superconducting modulation coil is modified to instead be a non-superconducting material, nominally manginin, exhibits reduced long-term, or d.c., thermal response. When an alternating current ... | 08/25/1987 |
| 4685106 | High rate multiplexer A high rate multiplexing system which is capable of operating on multiple channels while ensuring synchronization of the system operation. The system includes a basic timing network for synchronizing the system operation. Automatic phase adjusters are use... | 08/04/1987 |
| 4685132 | Bent sequence code generator A method and apparatus for generating a bent sequence code as a transform of an m-sequence code.... | 08/04/1987 |
| 4680759 | Standard/proportional multiplexer A multiplexer system which operates as a standard multiplexer as well as a proportional multiplexer by providing typical multiplexing operation by one circuit portion and proportional multiplexing operation by other portions of the circuit wherein the mul... | 07/14/1987 |
| 4678984 | Digital power converter input current control circuit A digital power converter input current control circuit is connected between a power converter and a power source. This circuit monitors, and controls if necessary, the current that flows between the power source and the power converter in a manner that p... | 07/07/1987 |
| 4679215 | Exceedance counting integrating photo-diode array The use of a comparator and counter associated, on-chip, with each photo-element of an array. Sensing each photo-element without discharging it and allowing each photo-element to accumulate a charge which is large relative to noise variations. These featu... | 07/07/1987 |
| 4663756 | Multiple-use priority network A multiple user priority network is provided by a double section priority PROM. One section of the PROM is accessed by a current priority code stored in a priority register, and new request signals that appear on lines that are coupled to the requesting c... | 05/05/1987 |
| 4663590 | Single frequency noise reduction circuit for squids A two-junction DC SQUID is supplied a single square-wave frequency signal that both biases the SQUID and provides modulation with a square-wave train that is 90° phase displaced with respect to the bias square-wave train in order to eliminate low frequen... | 05/05/1987 |
| 4661731 | Shield for fan motor for reducing structureborne noise and the external magnetic field A tubeaxial type electrical cooling fan is constructed with two or more fan struts that extend across the open back of the fan to a circular support ring that supports the shaft of the motor, which in turn supports the fan blades. In such a structure, ben... | 04/28/1987 |
| 4660061 | Intermediate normal metal layers in superconducting circuitry A thin, nominally 150 angstroms, normal metal layer, nominally the noble normal metal palladium, sandwiched intermediate between two superconducting layers, nominally niobium, supports totally superconducting current flow therethrough such normal metal la... | 04/21/1987 |
| 4658256 | Combined monopulse comparator and adaptive noise canceller for antennas This invention is directed to a modified monopulse comparator which includes two sum and difference hybrid junctions. The first hybrid junction produces a signal-free sample of any interference which is received by the datalink receiving antenna. The seco... | 04/14/1987 |
| 4656484 | Radar reflector and scanner with electromagnetic programmable drive Elements of a radar antenna are provided with one or more electromagnetic actuators capable of moving the elements (scanner or parabolic reflector), independently of the support system in response to electrical signals applied to the coils of the electrom... | 04/07/1987 |
| 4653074 | Bit sync generator A system for synchronizing information bits to any frequency signal chain with low jitter correction and adapted for gate array implementation.... | 03/24/1987 |
| 4648135 | Photo diode-array dynamic range for optical signal systems A signal handling system of improved dynamic range wherein a logarithmic circuit is interposed between a photo-diode array and other output circuitry.... | 03/03/1987 |
| 4644195 | Quad multi-channel synthesizer A synthesizer circuit which generates a family of independent clock signals from multiple input clock signal sources under microprocessor control.... | 02/17/1987 |
| 4638261 | Low noise amplifier with high intercept point A low noise amplifier (LNA) circuit including a linear amplifier which generates low noise in the presence of a high level signal and includes a field effect transistor with input and output matching networks and which retains linear operation in the pres... | 01/20/1987 |
| 4638417 | Power density spectrum controller A power density spectrum controller circuit which incorporates a programming element in conjunction with a voltage controlled oscillator and which uses spread spectrum techniques to provide a relatively clean output signal having little or no ripple, litt... | 01/20/1987 |
| 4638493 | Adaptive interference rejection for improved frequency hop detection Adaptive filters are used to separate frequency hop signals to improve the detection and estimation of the frequency hop signals. In preferred embodiments, two or more adaptive filters (which can be connected in series or in parallel) exhibit different co... | 01/20/1987 |
| 4636718 | Acousto-optical spectrum analyzer with expanded frequency resolution This invention is directed to a spectrum analyzer system which is laser-driven and which includes a standard Bragg cell and a standard photo-diode array as the output detector. In this system, the Bragg cell is driven by a bandwidth expansion circuit whic... | 01/13/1987 |
| 4590393 | High density gallium arsenide source driven logic circuit A novel high speed gallium arsenide depletion mode field effect transistor logic circuit is provided. One logic input is connected to the source electrode of the switching transistor and draws current when a low level input voltage is provided. Other logi... | 05/20/1986 |
| 4253125 | Head loading and unloading mechanism for magnetic flexible disk A loading-unloading mechanism for magnetic heads used with a double-sided, rotating, flexible, magnetic disk is disclosed wherein the mechanism raises or lowers the heads for respectively executing a read/write operation or non-operation.... | 02/24/1981 |
