Rudolf Schierjott

Illuminated sign for traffic control and method for functional monitoring of such a sign

Switched power supply comprising a free-running flow converter and electrically separated control loop

Current monitor for switching regulators

Heating mechanism for warming the ink in the write head of an ink printer means

Switch-mode power supply having a free-running forward converter

Secondary switch controller circuit for power supply

Arrangement for interference suppression of electromagnetic circuits

High efficiency push-pull saturation converter

Control circuit for an electric step-motor

Power supply with free oscillating forward converter and electrically insolated control loop