Integrated current supply circuit

US4174535A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Ruediger Mueller · Munich, DE
• Michael Pomper · Schliersee, DE
• Ludwig Leipold · Munich, DE

Key dates

• Filing date: Aug 10, 1978
• Grant date: Nov 13, 1979
• Expiry date: Aug 10, 1998

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10D89/213
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

An integrated current supply circuit is disclosed which utilizes a sub-circuit having a lambda-like current-voltage curve. Such a sub-circuit comprises a first field effect transistor whose source-drain path is connected to a series circuit formed from a load element and a second field effect transistor. The gate of the first field effect transistor is connected to the connection point of the load element and the second field effect transistor. A gate of the second FET leads either directly or via a voltage divider to the drain-side terminal of the series circuit. A capacitor is provided which is connected across output terminals of the circuit. The series circuit of the lambda sub-circuit is connected in parallel with input terminals, and the first FET connects between one of the input terminals and one of the output terminals.