Circuit arrangement for the controlled supply to a load

US4464619A · kind A · utility

Assignee

• The Braun Corporation · DE

Inventors

• Gerhard Schwarz · Altentreptow, DE
• Gunther Bergk · Niedernhausen, DE

Key dates

• Filing date: Jan 11, 1982
• Grant date: Aug 7, 1984
• Expiry date: Jan 11, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S320/19
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A supply circuit for supplying an electrical load with a relatively constant current from a variable voltage input source, the supply circuit including a blocking oscillator including a transformer with primary and secondary windings and a switching transistor, the load terminals of the switching transistor being connected in series with the primary winding across the voltage input source, a resistor-capacitor circuit connected between the secondary winding and a control terminal of the switching transistor, a diode connected between the secondary winding and a first terminal of the electrical load, a voltage feedback connection for applying to a first load terminal of the switching transistor a portion of the secondary winding voltage, and a reference voltage source connected to the control terminal of the switching transistor.