Silicon Laboratories Inc.

Kenneth Alan Berringer

Axel Thomsen

Kenneth Wilson Fernald

Scott Willingham

Jinwen Xiao

Paul Zavalney

Brent Wilson

Pedro Pachuca

A metering circuit includes a comparator including a first input to receive an input signal, and including a second input and an output. The metering circuit further includes a reference source to provide a time-varying reference signal to the second input during a peak counting operation.

Metering circuit including a time-varying reference and method

A motor control apparatus to control a motor external to the motor control apparatus includes a microcontroller unit (MCU). The MCU includes mixed signal motor control circuitry adapted to perform back electromotive force (EMF) motor control in a first mode of operation. The mixed signal motor control circuitry is further adapted to perform field oriented control (FOC) in a second mode of operation.

Apparatus for motor control system and associated methods

A processor for controlling a sensorless, brushless DC motor is disclosed comprising a first output for providing a control signal to a potentiometer controlling the speed and voltage of the DC motor. The processor also includes a second input for receiving a back-EMF voltage from an open phase of a three phase winding. The processor determines a digital error signal from the back-EMF voltage and generates a control signal responsive to the digital error signal. The control signal decreases the speed of the motor when the digital error signal is in a first range. The processor decreases both the speed and voltage of the motor when the digital error signal is in a second range. The processor increases the speed of the motor when the digital error signal is in a third range. The processor increases both the speed and voltage of the motor when the digital error signal is in a fourth range.

MCU control for brushless DC motor

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Austin, TX, United States of America

Kenneth Alan Berringer