Patents Examined by John Kominski
  • Patent number: 4188590
    Abstract: The specification describes a solid state microwave power combiner wherein a plurality of solid state power generating devices are mounted between adjacent conical support and housing structures. These structures define the microwave electrical circuits for these devices, and also as provide a waveguiding region for propagating energy from these devices to a common output line. Both the support and housing structures have their apexes integrally joined, respectively, to input and output conductors of a common output coaxial line used for coupling power out of the combiner. This novel geometrical configuration minimizes the electrical distance between the power generating devices and the coaxial output line, maximizes the packing density of the structure and optimizes the electrical performance of RF termination elements for these devices.
    Type: Grant
    Filed: November 25, 1977
    Date of Patent: February 12, 1980
    Assignee: Hughes Aircraft Company
    Inventors: Robert S. Harp, Kenneth J. Russell
  • Patent number: 4162459
    Abstract: A circuit for the modulation of the frequency of radiation produced by a magnetron includes a directional coupler connected to the output port of the magnetron, a circulator coupled between the output port and a load, and a phase shifter connected between the directional coupler and the circulator.
    Type: Grant
    Filed: September 18, 1978
    Date of Patent: July 24, 1979
    Assignee: Raytheon Company
    Inventor: Howard Scharfman
  • Patent number: 4160957
    Abstract: Jamming arrangements comprising an oscillator including a number of circuits each comprising a surface acoustic wave filter feeding an amplifier responsive only to signals above a predetermined threshold level, the filter characteristics being chosen so that each circuit is responsive to a different range of frequencies, the circuits being connected mutually in parallel and a switch being provided via which the output circuits of the terminals are coupled to the input terminals to define a feedback loop when the switch is closed, the arrangement being such that when the switch is closed and a signal to be jammed is injected into the loop at a frequency within the pass band of at least one of the filters so as to produce a signal which is fed to its associated amplifier above the threshold, oscillation is maintained around the loop at the frequency of the signal to be jammed.
    Type: Grant
    Filed: January 3, 1978
    Date of Patent: July 10, 1979
    Assignee: Plessey Handel und Investments AG
    Inventor: David W. Jesinger
  • Patent number: 4160958
    Abstract: A sampling linearizer including a phase shifter for use in improving the accuracy of an FM generated waveform with respect to a desired frequency rate of change is disclosed. The sampling linearizer comprises an oscillator for generating a reference frequency signal; a mixer governed by the generated FM waveform signal and the reference frequency signal to generate a first signal which is sampled at predetermined sampling times; and a linearizing servo controller which is governed by the sampled signal to reduce the inaccuracies in the genereated FM waveform with respect to the desired frequency rate of change. The sampling linearizer further includes a phase shifter disposed between the oscillator and mixer thereof and operative upon the reference frequency signal to generate another signal, the phase shifter being operative to shift the phase of the another signal with respect to the reference frequency signal as governed by a sequence of control signals representative of predetermined phase shift values.
    Type: Grant
    Filed: August 21, 1978
    Date of Patent: July 10, 1979
    Assignee: Westinghouse Electric Corp.
    Inventors: James H. Mims, Francis W. Hopwood
  • Patent number: 4158182
    Abstract: A low noise, high frequency oscillator (50) is disclosed which includes a JFET (100) having a tuned circuit (102) connected in a feedback arrangement with it. The JFET is operated in a self-biasing mode and includes a gate biasing circuit (104) comprised of a capacitor (114) and a resistor (116). The capacitor (114) and resistor (116) are selected such that the gate bias circuit (104) represents a low impedance path to low frequency noise components. These low frequency noise components are therefore shunted to ground, and do not modulate the operation of the JFET (100). This significantly reduces noise in the oscillator output signal. A hot carrier diode (118) is connected across the gate-to-source junction of the JFET (100) to reduce loading on the tuned circuit (102) by the JFET (100).
    Type: Grant
    Filed: July 31, 1978
    Date of Patent: June 12, 1979
    Assignee: Harris Corporation
    Inventor: Clyde Washburn
  • Patent number: 4157514
    Abstract: An incoming signal including the object signal and plurality of noise signals dispersed about the object signal is fully masked with white noise and applied to a phase synchronization loop wide in loop band width and including a local oscillator repeatedly swept by a sweep generator. During the repeated sweep a control signal generator successively decreases the level of the white noise until the oscillator is locked in the phase of the object signal. At that time the signal control generator is operated to suspend the sweeping operation and prevent the white noise from being added to the incoming signal.
    Type: Grant
    Filed: May 31, 1978
    Date of Patent: June 5, 1979
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yushi Naito, Yoichi Moritani, Yoshinori Uchida
  • Patent number: 4156211
    Abstract: A microwave oscillator including a tuning varactor and a transistor in a thin film series resonant circuit.
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: May 22, 1979
    Assignee: Watkins-Johnson Company
    Inventors: Ronald N. Buswell, Willem A. Evers, William D. Heichel
  • Patent number: 4155050
    Abstract: A loop phase detector circuit in which the phase offset error arising from imperfections in the circuit parameters, inter alia, temperature and power supply voltage, is reduced to a minimum by the circuit arrangement disclosed herein. The phase comparator circuit compares the phase of the output frequency of a voltage to frequency converter with an input reference signal, and provides, in complementary form, a phase comparison error signal and the complement of a phase comparison error signal. Due to temperature and supply voltage fluctuation of the circuit, the phase comparison error signal and the complementary phase comparison error signal may not be symmetrical in amplitude and may contain offset errors not directly related to phase errors.
    Type: Grant
    Filed: October 17, 1978
    Date of Patent: May 15, 1979
    Assignee: Rockwell International Corporation
    Inventor: Richard A. Nichols
  • Patent number: 4153835
    Abstract: Described is a temperature compensation circuit comprising a transistor, a device (to which compensated voltage is to be applied) connected to the collector, and a plurality of resistors forming a voltage divider. A node separates the resistors into two branches and is connected to the base, and a temperature sensor having a negative temperature coefficient of resistance is located in one of the branches. The branches are mutually adapted so that the ratio of the resistance of the branch containing the sensor to the sum of the resistances of both branches is a linear function of temperature. An application of this circuit to the control of the bias voltage supplied to an avalanche photodiode is specifically described.
    Type: Grant
    Filed: August 25, 1977
    Date of Patent: May 8, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Chun-Lim Lau, Richard G. Smith
  • Patent number: 4152670
    Abstract: A circuit arrangement for feeding a sinusoidal signal current to a wide range of loads, such as ringing current transmitted over subscriber lines from a telephone exchange, comprises a modulator which converts a rectified sine wave into a sequence of unipolar constant-amplitude pulses of varying width controlling, through a logic network, the energization of a load impedance via a resonant circuit from a d-c source. A switchover unit, including a transistor bridge having a diagonal connected across the d-c source, receives command signals from the logic network in response to the control pulses and to the outputs of two sensors determining the instant polarities of the load voltage and the load current in the output of the resonant circuit. The switchover unit produces a train of bipolar driving pulses, of constant amplitude and synchronized with the control pulses, whose polarity changes with alternate half-cycles of the sine wave fed in rectified form to the modulator.
    Type: Grant
    Filed: February 14, 1978
    Date of Patent: May 1, 1979
    Assignee: Societa Italiana Telecomunicazioni Siemens S.p.A.
    Inventors: Augusto Rimondini, Giuseppe Balzarini
  • Patent number: 4152671
    Abstract: A radio frequency oscillator-modulator for use in a video game includes a folded metal shield box having a slot on one of its ends in which a similarly slotted printed circuit board containing the oscillator and modulator is mated with. Circuitry of the oscillator and modulator provides for great linearity and low R.F. radiation. The slot arrangement provides for effective grounding of the ground metallization of the external portion of the printed circuit board which contains the radio frequency output terminal along with the various input terminals. This portion contains ground metallization which makes very effective electrical contact with the slot of the shield box thus again containing R.F. radiation.
    Type: Grant
    Filed: July 25, 1977
    Date of Patent: May 1, 1979
    Assignee: Atari, Inc.
    Inventors: Wade B. Tuma, Niles E. Strohl
  • Patent number: 4152588
    Abstract: A scanning mirror position sensor operable from the back side of a scanning mirror which utilizes the front side of the mirror for scanning a scene to be interrogated or displayed. A rectangular uniformly distributed light source is reflected from the back surface of the scanning mirror across a grating consisting of alternate transparent and opaque regions placed in the focal plane in front of a single large area photodetector. As the light from the light source sweeps across the grating, the detector is alternately energized and deenergized to form a serial pulse train which is coupled to a pulse counter which accumulates the pulse count to thereby provide a continual and accurate measure of the mirror position.
    Type: Grant
    Filed: October 28, 1977
    Date of Patent: May 1, 1979
    Assignee: Hughes Aircraft Company
    Inventors: Robert W. Klatt, A. Stevens Halsted
  • Patent number: 4151488
    Abstract: An improved pulsed power supply for a solid state diode oscillator is shown. In the preferred embodiment a voltage equal to the threshold voltage of a negative resistance diode oscillator is applied continuously through an appropriately sized resistor and at least one normally nonconducting transistor is connected in parallel with such resistor, the transistor being arranged to be turned to its conducting state when a driver produces a control pulse, thereby to cause the negative resistance diode oscillator to oscillate.
    Type: Grant
    Filed: February 22, 1978
    Date of Patent: April 24, 1979
    Assignee: Raytheon Company
    Inventor: Ronald M. Wallace
  • Patent number: 4150344
    Abstract: A tunable microwave oscillator including a transistor with a tuning diode which form an oscillating circuit particularly for use in television tuners and which does not require an inductor. A novel combination of an oscillator and mixer is also provided and the oscillator and mixer are designed to cover broad tuning ranges.
    Type: Grant
    Filed: February 10, 1977
    Date of Patent: April 17, 1979
    Assignee: Siemens Aktiengesellschaft
    Inventor: Josef Fenk
  • Patent number: 4150316
    Abstract: An incandescent projection lamp which includes a reflector located within the lamp's envelope at an established distance from a biplanar filament structure. The lamp provides bidirectional light output with the reflector having an opening therein for defining the light output in one of the directions.
    Type: Grant
    Filed: January 13, 1977
    Date of Patent: April 17, 1979
    Assignee: GTE Sylvania Incorporated
    Inventors: Robert E. Levin, Robert P. Bonazoli
  • Patent number: 4150338
    Abstract: An input signal comprising a carrier wave whose frequency may vary is applied to two complementary conductivity type transistors. Two resonant circuits, one tuned to a frequency slightly higher than and the other tuned to a frequency slightly lower than that of the nominal center frequency of the carrier wave are coupled between the respective drain electrodes of these transistors and a circuit node. The voltages developed across these resonant circuits are detected and the detection components subtracted from one another to obtain the circuit output signal.
    Type: Grant
    Filed: April 17, 1978
    Date of Patent: April 17, 1979
    Assignee: RCA Corporation
    Inventor: Merle V. Hoover
  • Patent number: 4149126
    Abstract: A microwave oscillator in which the power supplied by 2N microwave diodes such as avalanche or Gunn effect diodes is added. The diodes are connected together in two by sections of strip lines which enables magnetic coupling between these diodes and a dielectric resonator, with the diodes in each couple operating in phase opposition.
    Type: Grant
    Filed: December 27, 1977
    Date of Patent: April 10, 1979
    Assignee: Thomson-CSF
    Inventors: Yves Archambault, Didier Kaminsky
  • Patent number: 4147994
    Abstract: A power combiner for solid state oscillator circuits is shown to be the combination of a central cavity and a plurality of subcavities, each one of the latter being dimensioned to operate in the TM.sub.010 mode to synchronize a plurality of solid state oscillator circuits. The central cavity and each one of the plurality of subcavities are coupled together through coaxial lines so that the central cavity in turn synchronizes the plurality of subcavities.
    Type: Grant
    Filed: July 31, 1978
    Date of Patent: April 3, 1979
    Assignee: Raytheon Company
    Inventors: Glenn R. Thoren, James L. Lampen, George Jerinic
  • Patent number: 4147993
    Abstract: An electrical signal generator for generating signals at specific frequencies includes means for producing an adjustable frequency output, adjusting means for causing changes in the output frequency, and control means for adjustably pre-selecting the sizes of the frequency changes. In this way, the operator can be provided with a frequency changing control which, when operated, causes the output frequency to change in predetermined steps.
    Type: Grant
    Filed: November 28, 1977
    Date of Patent: April 3, 1979
    Assignee: Racal-Dana Instruments Limited
    Inventors: Malcolm F. Sizmur, David Brewerton, Brian W. Mason
  • Patent number: 4147996
    Abstract: A pulsing oscillator employs a capacitor that is charged through a diode from a current-source circuit and repeatedly discharges through a PNP and an NPN transistor when the capacitor voltage reaches a predetermined voltage. Another transistor is connected in shunt with a diode and capacitor, and is turned on only when the first mentioned transistors turn on so as to divert the frequency controlling current from the current source away from the capacitor during the time of discharge. The output pulse width remains constant for all values of control current and large control currents may be used without risking the "latching-on" by large control currents of the transistors intended to carry the discharge current from the capacitor.
    Type: Grant
    Filed: April 7, 1978
    Date of Patent: April 3, 1979
    Assignee: Sprague Electric Company
    Inventor: Walter S. Gontowski, Jr.