Patents Represented by Attorney V. L. Sewell
-
Patent number: 4712223Abstract: A digital phase locked loop to function as a stable reference clock given a gapped, or pulse stuffed, input clock signal which may have a frequency offset relative to the nominal specified frequency and a phase jitter relative to the average frequency of the input signal, the digital phase locked loop comprising an input synchronizer for synchronizing the input clock signal to a stable high frequency reference clock. The output of the input synchronizer increments a write counter and resets a phase counter to zero at the begininning of each cycle of the input clock signal. The outputs of the write counter and the phase counter are sampled by a sampling circuit which interprets the sampled data in two's complement form.Type: GrantFiled: October 9, 1986Date of Patent: December 8, 1987Assignee: Rockwell International CorporationInventor: Blaine J. Nelson
-
Patent number: 4707579Abstract: Circuitry for measuring the time between commencement of a flame-off arc and either the contact of the ball with the capillary tip during the flame-off process or the arc flame-off time as determined by a timer. Such information as to the length of time to contact is usable in troubleshooting quality control problems in the wire bonding process. By comparing the information presently obtained with past time checks, an alarm can be provided for significant deviations.Type: GrantFiled: February 24, 1987Date of Patent: November 17, 1987Assignee: Rockwell International CorporationInventor: Frank A. McKiel, Jr.
-
Patent number: 4702712Abstract: A device is disclosed for insulating and keying quick disconnect connectors. The device is wrapped around the quick disconnect connection with the wire already crimped in the quick disconnect connection and snaps on securely. It provides a multicombination key which prevents the insertion of a keyed insulator in the inappropriate mating connector slot.Type: GrantFiled: October 24, 1986Date of Patent: October 27, 1987Assignee: Rockwell International CorporationInventors: Ali Ghorbani, Gary M. Walker
-
Patent number: 4700084Abstract: A circuit for using a high speed clock and a counter to obtain a recovered clock with incoming data resetting the counter whenever a logic "1" of more than a predetermined number of high speed clocks is received. Further, the presence of a data out logic "1" inhibits the reaction of the circuit to any further input pulses during the time necessary to generate the retimed data output logic "1".Type: GrantFiled: August 26, 1985Date of Patent: October 13, 1987Assignee: Rockwell International CorporationInventor: Charles M. Honaker, Jr.
-
Patent number: 4696016Abstract: A digital clock recovery circuit is described which extracts the signal element timing from a return-to-zero data stream. A converter changes the bipolar digital data stream to at least one first return-to-zero data stream representing pulses in the bipolar digital data stream. In these streams, a logic one is typically represented by a pulse of undetermined width less than the bit period. A logic zero is typically represented by no pulse. A reference clock signal having a predetermined frequency is required by the circuitry. An edge detector detects the positive going edges of the pulses in the combined return-to-zero data stream, and generates load pulses to a counter which are synchronized to transitions of the reference clock signal. The counter receives the load pulses and utilizes reference clock signal to produce a recovered clock signal, skiping or repeating counter states to kepp the recovered clock signal aligned with the bipolar digital data stream.Type: GrantFiled: October 2, 1986Date of Patent: September 22, 1987Assignee: Rockwell International CorporationInventors: John G. Rozema, Kenneth A. Thompson
-
Patent number: 4694263Abstract: A method and apparatus for monitoring a frequency modulated signal including harmonically mixing the modulated signal with a significantly lower reference frequency, dividing the mixed signal, filtering out the reference frequency, rectifying and integrating the filtered frequency and then testing the integrated signal is disclosed. A correction signal responsive to the integrated signal is provided in one arrangement.Type: GrantFiled: June 9, 1986Date of Patent: September 15, 1987Assignee: Rockwell International CorporationInventor: Richard A. Cross
-
Patent number: 4687897Abstract: It has been ascertained that there is a momentary drop in the flame-off arc voltage used to produce a ball in a ball bonder when the ball contacts the tool tip. A part of the present invention comprises a circuit for detecting this voltage drop and terminating the arc voltage immediately after such contact is made.Type: GrantFiled: November 24, 1986Date of Patent: August 18, 1987Assignee: Rockwell International CorporationInventor: Frank A. McKiel, Jr.
-
Patent number: 4682181Abstract: A flush-mounted radiating antenna is disclosed which can be electronically switched to produce a rotating directional field with no moving parts in the antenna element itself or with the appropriate electronics in the entire mechanism. This is accomplished by utilizing pie-shaped sections on the flush surface which are capacitively coupled to a central feed element and shorting some of the pie-shaped capacitively coupled elements to a ground plane whereby the normally omnidirectional pattern is perturbed to a directional pattern.Type: GrantFiled: April 22, 1985Date of Patent: July 21, 1987Assignee: Rockwell International CorporationInventors: Theodore A. Dumas, Leslie V. Griffee
-
Patent number: 4678252Abstract: An electrical connector and an apparatus for providing staging of electrical connections between a motherboard and a daughterboard is disclosed. An angled insulator having first and second legs forms a pie-shaped cavity for receiving one edge of a printed circuit board. The first leg forms a fulcrum about which the printed circuit board is rotated until it abuts an alignment surface of an electrically insulating stiffener formed in the second leg. A second connector is used for providing staging of electrical connections. Protective end caps prevent the insertion of a printed circuit board until it is properly aligned.Type: GrantFiled: May 27, 1986Date of Patent: July 7, 1987Assignee: Rockwell International CorporationInventor: Larry V. Moore
-
Patent number: 4675618Abstract: A system for frequency modulation by a signal, the system including an oscillator having a known linearity distortion, a circuit for selecting one from a plurality of predetermined constants, a circuit for operating on the signal with the selected constant, and a digital to analog converter in an embodiment where the signal is digital, for converting the signal having been operated on to an analog signal for modulating the oscillator is disclosed. One embodiment includes a circuit for determining the magnitude of the input signal.Type: GrantFiled: June 9, 1986Date of Patent: June 23, 1987Assignee: Rockwell International CorporationInventor: Richard A. Cross
-
Patent number: 4648088Abstract: A time division multiplex ring comprising a plurality of nodes connected together by interchanged trunks (main and standby paths) in a ring type or closed loop configuration. Each node in the system includes transmitters and receivers on the main and standby paths along with bridging and switching circuits connected to data failure and other failure detection circuits for operating same arranged such that data and alarm signals are transmitted in the first direction on the main path around the closed loop and in an opposite direction on the standby path. The system is arranged such that if a failure occurs only on the main path and the standby path is unaffected, all communications are switched to the standby path.Type: GrantFiled: August 19, 1985Date of Patent: March 3, 1987Assignee: Rockwell International CorporationInventors: George C. Cagle, Steven J. Clendening
-
Broadband signal termination apparatus comprising series cascade of resistors and transmission lines
Patent number: 4647877Abstract: A signal termination device is illustrated using planar circuit technology for providing both broadband capabilities from DC to over ten gigahertz while maintaining small size and high power dissipation capabilities. This is accomplished by plating a series cascade of resistors and transmission lines such that the sum of the resistors is equal to the desired termination impedance and the impedance of the interconnecting transmission lines is equal to the sum of the remaining resistors between that point and ground. The use of the intervening transmission lines enhances the power handling capability of the resistor elements and enhances uniform power densities in the resistor elements.Type: GrantFiled: March 11, 1985Date of Patent: March 3, 1987Assignee: Rockwell International CorporationInventor: William J. Thompson -
Patent number: 4640575Abstract: A flexible flap, having an elastic memory, which flap is used to normally cover a lightwave connector so as to prevent laser radiation emissions from the connector. The flexible nature of the flap allows the forcible deflection thereof, so that a mating connector can be attached to the normally covered one, and yet when the mating connector is removed the flap will automatically return to the covering position. In addition to preventing the emission of laser radiations, the flap can reduce contamination materials, such as dust, from covering the end of the fiber optic material.Type: GrantFiled: January 13, 1986Date of Patent: February 3, 1987Assignee: Rockwell International CorporationInventor: Theodore A. Dumas
-
Patent number: 4635277Abstract: A digital circuit which ascertains the middle of a digital pulse by first determining its total length through digital logic means in combination with a digital signal delay means, and uses this information to operate a state machine (or sequencer), which will assume that data clocks occur at the time of the last received valid data pulse until new logic "1" data is received, and at this time can be resynchronized or phase-locked if there is a time discrepancy between recently received data and the status of the state machine.Type: GrantFiled: October 21, 1985Date of Patent: January 6, 1987Assignee: Rockwell International CorporationInventors: John K. Blake, Blaine J. Nelson
-
Patent number: 4631546Abstract: An antenna of the type having a central driven element and a plurality of surrounding parasitic elements is shown. Further, there is circuitry for modifying the basic omnidirectional pattern of said antenna to a directional pattern by normally capacitively coupling the parasitic elements to ground but on a selective basis changing some of the parasitic elements to be inductively coupled to ground whereby they act as reflectors and provide an eccentric signal radiation pattern. By cyclically altering the connection of various parasitic elements in their coupling to ground, a rotating directional signal is produced.Type: GrantFiled: January 14, 1985Date of Patent: December 23, 1986Assignee: Rockwell International CorporationInventors: Ted A. Dumas, Les V. Griffee
-
Patent number: 4630268Abstract: To perform a loopback condition for testing purposes, the present apparatus supplies a null signal from an end terminal on a communication link through a set of repeater stations to reinitialize the repeater stations. It then sends N+1 pulses of a frequency different than the data frequency through the repeater stations with each repeater station that receives more than two pulses disgarding one pulse and forwarding the rest. The repeater station or remote end terminal that receives only two pulses reconfigures itself to a loopback condition, returns a null signal back to the end terminal originally transmitting the N+1 pulses and then sends an acknowledgement pulse. Data signal testing can then be performed until a further null condition is sent thereby reinitializing the repeater stations to the data transmission configuration.Type: GrantFiled: August 30, 1984Date of Patent: December 16, 1986Assignee: Rockwell International CorporationInventor: Stephan M. Rodenbaugh
-
Patent number: 4625179Abstract: Space feedback comprising a shield over the tuning elements of a FET radio frequency amplifier provides positive feedback between the gate and drain terminals to raise the gain of the amplifier above what it would be without the space feedback, while simultaneously lowering the noise figure. Not only is the relative noise lowered, but the absolute amount of noise is lowered.Type: GrantFiled: October 7, 1985Date of Patent: November 25, 1986Assignee: Rockwell International CorporationInventor: Ben R. Hallford
-
Patent number: 4614906Abstract: Current regulating apparatus for connecting a plurality of different impedance loads in series across a high voltage power source with protection means in the event of the failure in the shorted or open condition of the series connected load portions.Type: GrantFiled: July 3, 1985Date of Patent: September 30, 1986Assignee: Rockwell International CorporationInventor: Kenneth Y. Maxham
-
Patent number: 4611097Abstract: This invention depicts a novel sine wave ring generator for use with a telephone circuit and an input voltage having a predetermined range, the generator comprising a switching power supply for providing a pre-determined DC output voltage from the input voltage range, an oscillator for providing a pseudo-sine wave output with a predetermined frequency, and an amplifier for amplifying the pseudo-sine wave and for receiving the predetermined DC voltage having a low output impedance thereby maintaining regulation of a circuit output voltage in a predetermined range and supplying a circuit output current.Type: GrantFiled: June 13, 1984Date of Patent: September 9, 1986Assignee: Rockwell InternationalInventor: Mark W. Grimes
-
Patent number: 4604585Abstract: A unitary component operating as a low noise amplifier incorporates several other tuning components in conjunction with an FET. By adjusting the tuning components, the overall amplification and impedance characteristics of the unit can be standardized in spite of typical variations in impedance and amplifying characteristics of the FET by itself. The incorporation of such a drop-in module in a microwave circuit, simplifies testing and repair of the remaining portions of the circuit, since the drop-in modules can easily be tested and adjusted for proper operation in a test jig separate from the actual operating circuit.Type: GrantFiled: October 7, 1985Date of Patent: August 5, 1986Assignee: Rockwell International CorporationInventor: Ben R. Hallford