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Joseph A Bailey: Clock control technique and system for a microprocessor including a thermal sensor. Advanced Micro Devices, Conley Rose & Tayon, September 19, 1995: US05451892 (96 worldwide citation)

A clock control circuit is provided to control the frequency of a microprocessor clock signal and includes a clock management unit which controls the frequency of a timing signal applied to a clock generator and distribution unit, which correspondingly supplies an internal clock signal to a CPU core ...


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Gregory O Hill: Substation load distribution monitor system. Systems Analysis and Integration, Knobbe Martens Olson & Bear, April 11, 1995: US05406495 (95 worldwide citation)

The monitoring and control system of the present invention provides a distributed intelligence, data acquisition and control system which collects and analyzes large amounts of data representing power usage from a power distribution substation. Using a Discrete Fourier Transform, the system provides ...


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Herbert Brauns: Sampling phase detector. Robert Bosch, Michael J Striker, May 4, 1999: US05900747 (91 worldwide citation)

The sampling phase detector whose output signal (fd) has a very broad-band and a very even frequency response characteristic includes a step-recovery-diode (SRD) to which a series circuit including at least two diodes (D1,D2) is connected in parallel by means of coupling capacitors (Ck1,Ck2). An inp ...


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Paul C Hunt: System for detection of the phase of an electrical signal on an alternating circuit power line. National Rural Electric Cooperative Assn, Mark D Frederiksen, Zarley McKee Thomte Voorhees & Sease, November 14, 1995: US05467011 (68 worldwide citation)

A data transmission system for power line carriers includes a transmitter which generates a stable carrier frequency at a bandwidth of less than one hertz. The transmitter is connected to the power line to transmit the generated frequency over the power line to a receiver. The receiver implements fi ...


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Chul Oh Yoon, Yevgen Barsukov, Jong Hyun Kim: Method and apparatus for determining Characteristic parameters of a charge storage device. Korea Kumbho Petrochemical, Davidson Davidson & Kappel, December 12, 2000: US06160382 (67 worldwide citation)

A method and an apparatus for determining characteristic parameters of a charge storage device based on a wide frequency range of impedance measurement and a non-linear equivalent circuit model by which the parameters of the non-linear equivalent circuit model indicative of the characteristics of va ...


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Morita Akira, Yoshimura Hiroyuki: Phase difference measuring apparatus and mass flowmeter thereof. Fuji Electric, March 20, 1996: EP0702212-A2 (61 worldwide citation)

A phase difference measuring apparatus for accurately measuring the phase difference (fine time difference) of two signals with the same frequency with a reduced number of bits for A/D conversion is disclosed. In addition to output signals of an upstream side pickup and a downstream side pickup of a ...


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Gerald A Colman: Coriolis-type fluid mass flow rate measurement device and method employing a least-squares algorithm. Schlumberger, Sanford J Asman, July 4, 1995: US05429002 (59 worldwide citation)

A Coriolis-type fluid flow rate measuring system splits a fluid flow that is to be measured into two equal half flows and passes the same respectively through two physically similar conduits which are oscillated about respective parallel oscillation axes. Analog sinusoidal signals corresponding to r ...


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Scott Campbell: Digital speedometer. Fulwider Patton Rieber Lee & Utecht, July 24, 1979: US04162445 (59 worldwide citation)

A digital speedometer is provided for use in an automotive vehicle and includes a transducer for connection to a conventional speedometer cable driver. The transducer is equipped with an optical encoder that produces electrical pulses in response to rotational motion of the speedometer cable driver. ...


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Brian S Junk, Robert E Krocker, Tony J Wood: Fault detector for a three-phase alternating current supply. American Standard, William J Beres, David L Polsley, Robert J Harter, June 14, 1988: US04751653 (48 worldwide citation)

A microcomputer based fault detector for identifying a phase reversal, a phase loss, and a power loss in three-phase circuits. A microcomputer samples a pattern of timing signals generated in response to three current transformers associated with each of the three phases. The changing pattern of tim ...