Four-quadrant current-regulated energization of D.C. motor using

Frequency-comparing devices

Full wave motor control circuit

Full-wave bidirectional DC motor drive circuit

Furnace draft control with remote control feature

General purpose and optimal length controller for cyclic duty mo

Half and full wave energizing system for permanent magnet D.C. m

Helical scan recorder having capstan motor speed responsive to a

High frequency pulse width modulation

Hoist with overload safety protection

Image forming system

Inductive load current measuring circuit

Industrial robot

Inertia compensated static motor drive

Load actuating servomechanism with resonance equalization

Load drive apparatus

Load voltage clamping circuit for voltage turn-off chopper

Low vibration pulse drive device for an electric motor

Magnetic disc apparatus

Means for digital control