Patents Represented by Attorney, Agent or Law Firm John L. DeAngelis, Jr.
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Patent number: 4720690Abstract: A sculptured stripline interface conductor for providing spaced apart access to the closely spaced conductors of a circuit element. The low impedance and crosstalk of stripline suggests the use thereof in high-frequency applications. In the sculptured stripline interface conductor of the present invention the circuit traces of the buried signal layer are closely spaced in a first section of the stripline interface conductor and spaced further apart in a second section thereof. In the area where the circuit traces are closely spaced, different-shaped rectangular holes are made in the upper and lower ground plane conductors to expose the inner circuit traces. The upper ground plane conductor also has holes in the second section for exposing a pad in the circuit traces. External connection to each conductor of the circuit element is then made to the circuit trace pad through the holes in the upper ground plane conductor.Type: GrantFiled: July 14, 1986Date of Patent: January 19, 1988Assignee: Harris CorporationInventors: Marc H. Popek, Kenneth D. Springer, William R. Beaudet, Ralph D. DiStefano
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Patent number: 4717918Abstract: An antenna feed network for forming and steering a phased array antenna beam. The feed network includes a plurality of dual parallel microwave transmission paths for each array element. To form and steer the beam at the correct spatial angle each pair of paths is shorted at the appropriate location to provide a time delay for the wave traversing the path. Each signal of the plurality of signals drives a different element of the antenna array with the proper phase to form and steer a beam from the array. The feed network is linear and reciprocal and can therefore be used in a transmit or receive antenna array. A ferrite circulator can be used to generate the time delayed signals on the short circuited transmission line. However, this antenna is not reciprocal and must be adjusted for either a particular receive or transmit beam position.Type: GrantFiled: August 23, 1985Date of Patent: January 5, 1988Assignee: Harris CorporationInventor: Kenneth R. Finken
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Patent number: 4715047Abstract: A differential phase shift keyed demodulator for demodulating a differential phase shift key modulated signal and synchronizing the clock thereof. To accomplish the demodulation, the differential phase shift keyed modulated signal is mixed with three reference signals offset by 120.degree.. This process creates three threshold boundaries in the XY vector phase plane and the three mixed signals are logically related to determine in which sector the instantaneous phase lies. The instantaneous phase at a first time is delayed for comparison with the instantaneous phase at a successive time. The result of this comparison process produces a signal representing the information. Synchronization of the data clock is accomplished by comparing the phase of the signal resulting from the demodulation at points midway between data decisions.Type: GrantFiled: April 4, 1986Date of Patent: December 22, 1987Assignee: Harris CorporationInventor: Allan R. Hambley
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Patent number: 4703484Abstract: An integrated circuit fault detection system. The integrated circuit fault detection system includes gate means associated with each functional input and functional output of the chip. The gate means are connected between the functional input and functional output terminals and the bonding pad and are controllable to allow the chip to operate in normal fashion using the input and output terminals thereof and the bonding pads associated therewith. The gate means are also controllable to read test data into a functional input terminal of the chip, write test data out of the functional output terminal of the chip, drive test data from chip functional circuitry through the bonding pad off chip, and accept test data from the outside world through a bonding pad and transfer the test data to chip functional circuitry. The test results can then be analyzed to determine if the chip is functioning properly.Type: GrantFiled: December 19, 1985Date of Patent: October 27, 1987Assignee: Harris CorporationInventors: Robert M. Rolfe, Lee J. Falkenstrom
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Patent number: 4675872Abstract: A Q-switch driver for controlling laser output pulses, so that the laser output pulses are of an approximately equal amplitude. Sequences of light request pulses, each such light request pulse for causing the laser to produce a laser output pulse, are input to the Q-switch driver. The Q-switch is controlled by an RF oscillating signal produced by the Q-switch driver such that when the RF signal is present there is no output signal from the laser, and when the RF signal is zero a laser output pulse is produced. If the time between sequences of light request pulses is greater than a predetermined value, the RF signal from the Q-switch driver is modified by leaving the RF partially on so that there is some Q-spoiling present. The amount of RF produced during each light request pulse is gradually diminished exponentially over a predetermined time so that eventually the RF goes to zero during each light request pulse.Type: GrantFiled: September 30, 1985Date of Patent: June 23, 1987Assignee: Harris CorporationInventors: Marc H. Popek, Kenneth D. Springer
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Patent number: 4675633Abstract: A waveguide expansion joint for connecting two circular waveguides operating in the TE.sub.01 mode while allowing for waveguide expansion and contraction due to temperature variations. The expansion joint includes first and second rings on the outside surface at one end thereof. When the expansion joint is inserted into a waveguide the rings are proximate to the inside diameter of the waveguide for absorbing undesired propagating modes, for pressurization of the expansion joint, and for coaxially aligning the waveguide and the expansion joint.Type: GrantFiled: August 5, 1985Date of Patent: June 23, 1987Assignee: Harris CorporationInventor: Lock R. Young
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Patent number: 4637064Abstract: A global network equalization system for equalizing all modem receivers and modem transmitters connected to a local area network. A calibration signal is injected over the local area network from a reference or common point and received by each of the receivers. A parameter of the received signal (e.g. amplitude, power, or spectral density) is compared to a reference value and the gain of the receiver is adjusted in response thereto. When each of the receivers has been equalized, each transmitter and the associated receiver is tuned to a common vacant frequency. The transmitter transmits a signal that is then received by the associated receiver via the reference point. The received signal is compared to another reference value and the transmitter gain is adjusted in response thereto. In this way each transmitter and each receiver is equalized to the reference point of the local area network, and completely equalized communications can occur between any transmitter and receiver connected thereto.Type: GrantFiled: April 10, 1985Date of Patent: January 13, 1987Assignee: Harris CorporationInventors: Richard D. Roberts, William D. Walker
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Patent number: 4635280Abstract: A bit synchronizer for Miller-encoded data includes a phase-locked loop for synchronizing the Miller-encoded data to the clock signal necessary for proper decoding thereof. The phase-locked loop includes a monostable multivibrator that is triggered on each transition of the Miller-encoded data. The monostable multivibrator controls the operation of two flip-flops that produce time-varying signals when the clock is leading or lagging the Miller-encoded data. The flip-flop output signals are constant when the clock is in phase with the Miller-encoded data. The flip-flop output signals are integrated, and the resultant signal controls a voltage-controlled oscillator so that the clock signal is phase coherent with the Miller-encoded data signal.Type: GrantFiled: May 28, 1985Date of Patent: January 6, 1987Assignee: Harris CorporationInventors: Donald E. Smith, Richard D. Roberts
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Patent number: 4628270Abstract: A frequency-agile synchronous demodulator for demodulating a carrier signal. The carrier signal is decomposed into in-phase and quadrature-phase components. Using the in-phase and quadrature-phase components, a first error signal is produced representing the phase difference between the carrier signal and a local oscillator signal. A reference signal, related to the frequency of the carrier signal by a factor N, is also input to the frequency-agile synchronous demodulator. The local oscillator signal is scaled by the factor N, and compared to the reference frequency signal in a phase detector. The phase detector produces a second error signal representing the phase difference between the reference signal and the local oscillator signal. The first error signal is integrated and summed with the second error signal. The resultant sum signal is integrated and input to the local oscillator for controlling the frequency and phase thereof.Type: GrantFiled: April 10, 1985Date of Patent: December 9, 1986Assignee: Harris CorporationInventor: Richard D. Roberts
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Patent number: 4617553Abstract: An encoded signal free of dc content is provided by modifying the Miller encoding scheme for digital data streams. The digital data stream is broken up into a sequence of blocks delineated by a one-to-zero transition at the beginning of each block. Each block is further subdivided such that the first half contains only zeros and the second half contains only ones. The number of zeros and ones are counted and novel encoding rules are applied depending on whether the number of ones and zeros is odd or even. If both the number of zeros and ones is even or odd, or the number of zeros is even and the number of ones is odd, encoding is accomplished using standard Miller rules. If the number of zeros is odd and the number of ones is even, Miller rules are used except the last one in the group is ignored. When both the number of zeros and ones is odd, special encoding rules are applied to the next block, dependent on the content of the next block.Type: GrantFiled: August 12, 1985Date of Patent: October 14, 1986Assignee: Harris CorporationInventors: Mark A. Webster, Richard D. Roberts
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Patent number: 4594082Abstract: A filtering apparatus for reducing problems due to water condensation in mobile or portable electronic instruments through the use of a controlled air path into an otherwise sealed enclosure. The apparatus includes a screen with a fine mesh for condensing water particles contained in the air that flows through the path with the screen positioned so that the condensed water flows out of the enclosure, and a dehydrating material located in series with the screen for absorbing additional moisture from the air. The apparatus is designed to fit almost entirely within the enclosure while being readily accessible for easy replacing of the filtering components.Type: GrantFiled: November 19, 1984Date of Patent: June 10, 1986Assignee: Harris CorporationInventor: Robert Catherwood, Sr.
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Patent number: 4575683Abstract: An offset compensator is disclosed. The offset compensator is suitable for use with any antipodal information signal distorted by an offset voltage. The offset compensator measures the positive and negative peak amplitudes, compares the magnitudes thereof, and produces a correction voltage based on that comparison. The correction voltage has a positive sign when the magnitude of the negative peak amplitude exceeds the magnitude of the positive peak amplitude, and the correction voltage has a negative sign when the magnitude of the positive peak amplitude exceeds the magnitude of the negative peak amplitude. The magnitude of the correction voltage represents the difference between the magnitudes of the positive and negative peak amplitudes, and is added to the antipodal information signal to remove the offset voltage.Type: GrantFiled: April 10, 1985Date of Patent: March 11, 1986Assignee: Harris CorporationInventors: Richard D. Roberts, Robert S. Padgett
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Patent number: 4398057Abstract: A covered distribution wire is provided with a clamp device having sufficient mass to provide conductor protection against damage from fault current arcs over a section of the conductor where the insulation cover is removed for interconnection or insulator support purposes. The clamp mass is at least a minimum value needed for practicality in usage and otherwise is based on the fault energy to be absorbed from fault arcs in the expected usage.Type: GrantFiled: March 30, 1981Date of Patent: August 9, 1983Assignee: Westinghouse Electric Corp.Inventors: Derrill F. Shankle, Jeffrey L. Maitlen
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Patent number: 4396794Abstract: A covered distribution wire is provided with a clamp device having sufficient mass to provide conductor protection against damage from fault current arcs over a section of the conductor where the insulation cover is removed for interconnection or insulator support purposes. The clamp comprises two members which are bolted together to surround the conductor section such that an enlarged disc-like end clamp portion is positioned about the conductor within one and a half centimeters of an end face of the adjacent wire cover. The two members are secured together such that a pair of slots exists between them along opposite sides of the conductor section with splatter barriers located on one end thereof. The slots are tapered with increasing width in the radially outward direction with the minimum width being great enough to avoid weldment and the maximum width being less than that which allows fault arc travel through the slot to the conductor section.Type: GrantFiled: March 30, 1981Date of Patent: August 2, 1983Assignee: Westinghouse Electric Corp.Inventor: Paul H. Stiller
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Patent number: 4396968Abstract: An insulated distribution conductor separated from the substation by one or more fuses is protected from arc damage by a clamp device having sufficient mass to absorb the arc energy and thereby prevent burndown and diameter reduction of the conductor at a point where the insulation covering has been removed. The clamp comprises two members which are bolted together to surround the bare section of the conductor and provide additional heat-absorbing mass at the point where the arc tends to dwell, i.e. at the end face of the insulation covering farthest from the power source.Type: GrantFiled: September 22, 1982Date of Patent: August 2, 1983Assignee: Westinghouse Electric Corp.Inventor: Paul H. Stiller
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Patent number: 4365211Abstract: An integrator and a voltage controlled oscillator produce a variable frequency output signal. A primary loop is locked to an input signal and has a narrow bandwidth allowing the output signal to precisely track the input signal. An initialization loop is locked to an internally generated reference signal and has a wide bandwidth for pulling the frequency of the output signal very close to the frequency of the reference signal. Since the frequency of the reference signal is approximately equal to the frequency of the input signal the initialization loop pulls the frequency of the output signal very close to the frequency of the input signal thus assuring locking of the primary loop. A switch selectively connects components of the primary loop to the integrator when the frequency difference between the reference signal and the output signal is small and connects components of the initialization loop to the integrator when the frequency difference between the reference signal and the output signal is large.Type: GrantFiled: October 31, 1980Date of Patent: December 21, 1982Assignee: Westinghouse Electric Corp.Inventor: Ronald L. Lee