Calibration technique of a BEMF detector

Circuit and process for regulating the speed of universal...

Circuit arrangement for power supply of a fan and/or battery by

Circuit arrangement for starting a DC motor

Circuit arrangement for the timed control of semiconductor switc

Circuit for controlling rotation speed of computer fan

Circuit for controlling the speed of a subfractional horsepower

Circuit for generating a dual purpose control signal in a disk a

Circuit for speed control for a one-phase or three-phase motor

Closed-loop feedback control system having an adaptive filter

Coil load driving circuit and optical disc device

Cold therapy system with intermittent fluid pumping for temperat

Compensated field current control for a separately excited DC mo

Compensation for input voltage variation in an electric motor dr

Compressor drive system

Computer monitoring unit and power window system

Control apparatus for a variable speed motor

Control circuit for a DC motor

Control circuit for a dc motor

Control circuit for a permanent magnet or constant excitation di