U.S. Philips Corporation

J&uuml;rgen Kordts

Ralf Beier

Axel N&auml;the

In an arrangement for coupling out an output current from a load current by a load ( ), particularly a deflection coil of a cathode ray tube by means of an output resistor ( ), which arrangement comprises an output current mirror ( ), in which a control value in the form of the difference between two voltages dropping across two resistors ( ) for controlling the load current is generated and in which a reference current bank ( ) is provided with a current mirror circuit whose input receives a constant current for generating constant currents, a minimal temperature dependence is obtained in that the output current is coupled to the emitter of at least a first output transistor ( ) and at least a second output transistor ( ) of the output current mirror, in that the reference current bank ( ) supplies a first reference current which, together with the output current, is coupled to the emitter of the first output transistor ( ) and the second output transistor ( ) of the output current mirror, in that the current through the collector of the first output transistor ( ) of the output current mirror is coupled to the input of a first current mirror ( ), in that the output current of the first current mirror ( ) is coupled to the collector of at least one input transistor ( ) of the output current mirror, in that a second current mirror ( ) is provided to whose input the current through the collector of the second output transistor ( ) of the output current mirror is coupled and whose output current is coupled to a first resistor ( ), in that a third current mirror ( ) is provided to whose input a second reference current from the reference current bank ( ) is coupled and whose output current is coupled to a second resistor ( ), in that the input transistor ( ) of the output current mirror has the same emitter area as that of the first output transistor ( ), and in that the difference between the voltages dropping across the first resistor ( ) and the second resistor ( ) represents the control value.

Growing community of inventors

Buxtehude, Germany

Jürgen Kordts

Growing community of inventors

Buxtehude, Germany

J&uuml;rgen Kordts

Jürgen Kordts