1
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 ...


2
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 ...


3
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 ...


4
Roger A Levinson, Sang T Ngo: Pipelined analog to digital converter. Exar Corporation, Henry K Woodward, Townsend and Townsend Khourie and Crew, November 5, 1996: US05572212 (11 worldwide citation)

A pipelined analog to digital converter in which data samples ripple down through the pipeline of comparator stages. Each stage of the pipeline includes switch capacitor amplifiers for comparing an analog signal to a first reference voltage, to a second reference voltage, and to an average of the fi ...