Other

Dolpan Audio, LLC

Thomas Peter Bushey

Jade H Alberkrack

Robert Alan Brannen

David Cave

A method of operating a direct current motor fan assembly is provided in which a motor controller operates to apply full power to kick-start a motor to overcome static forces. As soon as a sensor determines that the motor has begun to rotate, the motor controller changes the motor drive level from full power to a predetermined lower level to maintain a desired rotational speed.

DC motor variable kick-start

A method and apparatus is provided for processing signals from a Hall-effect device arrangement coupled to a monolithic brushless DC motor where the motor is driven by a PWM circuit providing PWM drive signals.

Noise suppression for hall sensor arrangements

In accordance with the principles of the invention, an integrated circuit comprises a substrate having a first FET formed on the substrate. The first FET has a first terminal coupleable to a load, a second terminal and a control terminal. The second terminal is connected to the substrate. The substrate comprises a parasitic body diode coupled between the first terminal and the substrate. The body diode is disposed such that it becomes conductive when a reverse voltage across the FET first terminal and the substrate is at least a first diode forward voltage. A voltage detector is formed on the substrate. The voltage detector has a first input coupled to the FET first terminal, a second input coupled to the substrate, and an output coupled to the FET control terminal. The voltage detector is responsive to a reverse voltage level at the FET first terminal that is less than the first diode forward voltage to turn the FET on for the duration of a reverse voltage having at least said reverse voltage level. The parasitic body diode is thereby prevented from injecting current into the substrate.

Synchronous substrate injection clamp

A method and apparatus is provided for processing signals from a Hall effect device arrangement coupled to a monolithic brushless DC motor where the motor is driven by a PWM circuit providing PWM drive signals.

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Mesa, AZ, United States of America

Thomas Peter Bushey