Circuit for producing direct voltages from pulses

US4087813A · kind A · utility

Assignee

• Licentia Patent-Verwaltungs-GmbH · DE

Inventors

• Willy Minner · Schwaigern, DE
• Bernhard Rall · Ulm, DE

Key dates

• Filing date: Jul 19, 1976
• Grant date: May 2, 1978
• Expiry date: Jul 19, 1996

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03M1/827
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

A circuit, for producing direct voltages, for example the tuning voltages for a television or radio receiver, lying within a direct voltage range from pulses fed to an integrating circuit at whose output the direct voltages appear. A plurality of pulses (I) are fed to the integrating circuit, at whose output the direct voltage (U.sub.I) appears, within a period duration (T) assigned to the desired direct voltage range, with the period duration (T) being at least of the magnitude T = (U.sub.max - U.sub.min) .multidot..DELTA..tau./.DELTA.U.sub.I, where (U.sub.max - U.sub.min) is the desired direct voltage range, .DELTA..tau. is the shortest time duration of a pulse (I) and .DELTA.U.sub.I is the smallest voltage step width associated with the shortest pulse duration .DELTA..tau. by which two different direct voltages (U.sub.I) at least differ from one another.