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Donald E Alfano, Joseph J Judkins III, Quoi V Huynh, Sang T Ngo: Intelligent power management for a variable speed fan. TelCom Semiconductor, Thomas E Law Offices of Thomas E Schatzel A Prof Corp Schatzel, March 14, 2000: US06037732 (50 worldwide citation)

A method for controlling the operation of a brushless DC fan for cooling heat generating components of a system is provided. The method includes providing a system temperature signal indicative of a system temperature and providing an intelligent shutdown enable signal. The system temperature signal ...


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Quoi V Huynh, Sang T Ngo, Joseph James Judkins III, Donald E Alfano: Monolithic fan controller. TelCom Semiconductor, Thomas E Law Offices of Thomas E Schatzel A Prof Corporation Schatzel, March 21, 2000: US06040668 (49 worldwide citation)

Disclosed herein is a monolithic fan controller circuit which provides the following features: a special start-up routine for the fan; a fan fault detector; a thermal fault detector; an automatic speed controller; a minimum speed controller; a routine for attempting to clear temporary fan faults; an ...


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Donald E Alfano, Brett Etter, Timothy Dupuis: Multiplexed RF isolator circuit. Silicon Laboratories, Howison & Arnott L, August 18, 2009: US07577223 (43 worldwide citation)

An integrated circuit isolator for providing data transfer of digital data signals across a voltage isolation barrier includes an integrated circuit package having a first plurality of input data pins on one side of the isolation barrier and a corresponding plurality of output data pins on the other ...


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Ka Y Leung, Donald E Alfano, David P Bresemann: MCU with integrated voltage isolator to provide a galvanic isolation between input and output. Silicon Laboratories, Howison & Arnott L, June 15, 2010: US07737871 (37 worldwide citation)

An integrated circuit comprises a first microcontroller unit located on a first die. The first microcontroller unit includes a first processing core for providing a parallel stream of data. A second microcontroller unit is located on a second die and includes a second processing core for receiving t ...


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Jerry Collings, Chuong Nguyen, Joseph James Judkins III, Donald E Alfano, Ali Tasdighi, Quoi V Huynh, Sang T Ngo: Verification of fan operation. Telcom Semiconductor, Thomas E Law Offices of Thomas E Schatzel A Prof Corp Schatzel, April 25, 2000: US06054823 (36 worldwide citation)

An apparatus for sensing the rotation of a brushless DC fan includes the fan and a sense/driver circuit and a capacitance. The sense/driver circuit is coupled to the fan to receive a sense input signal including a fluctuating electrical effect caused by fan commutation events. The sense/driver circu ...


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Ka Y Leung, Donald E Alfano, David P Bresemann: MCU with integrated voltage isolator and integrated galvanically isolated asynchronous serial data link. Silicon Laboratories, Howison & Arnott L, October 26, 2010: US07821428 (33 worldwide citation)

An integrated circuit comprises a first microcontroller unit for executing instructions in accordance with a first clock frequency. The microcontroller located on a first die and includes a first processing core for providing a parallel stream of data in accordance with the first clock frequency. A ...


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Donald E Alfano, Brett Etter, Timothy Dupuis: Multiplexed RF isolator. Silicon Laboratories, Howison & Arnott L, June 15, 2010: US07738568 (31 worldwide citation)

A system for providing multiple communication channels over a single voltage isolation link includes first circuitry for multiplexing a plurality of digital data inputs from a plurality of communication channels onto the single voltage isolation link. Second circuitry de-multiplexes the plurality of ...


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Donald E Alfano, Brett Etter, Timothy Dupuis: Bidirectional multiplexed RF isolator. Silicon Laboratories, Trop Pruner & Hu P C, November 1, 2011: US08049573 (25 worldwide citation)

An isolator provides bidirectional data transfer for a plurality of communications channels. First and second dies are located on first and second sides of a voltage isolation barrier and have a first and second plurality of digital data input/output pins associated therewith. First circuitry on the ...


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Donald E Alfano, Danny Allred, Douglas S Piasecki, Kenneth W Fernald, Ka Y Leung, Brian Caloway, Alvin Storvik, Paul Highley, Douglas R Holberg: Reconfigurable interface for coupling functional input/output blocks to limited number of i/o pins. Silicon Labs CP, Howison & Arnott, January 30, 2007: US07171542 (25 worldwide citation)

A reconfigurable processor system n an intergrated circuit includes a processor core that operates on a set of instructions to carry out predefined processes. A plurality of input/output pins are provided for interfacing with external signals. A reconfigurable interface interfaces between the proces ...