Patent · US Expired

Voltage supply circuit

US5015870A · kind A · utility

2Cited by

3References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Wolfgang Drobny · Heilbronn, DE
Bernhard Mattes · Sachsenheim, DE
Werner Nitschke · Ditzingen, DE
Peter Taufer · Renningen, DE
Hugo Weller · Oberriexingen, DE

Key dates

Filing date	Aug 3, 1989
Grant date	May 14, 1991
Priority date	—
Expiry date	Aug 3, 2009

Classification

Technology area (CPC H)Electricity
CPC primaryH02J9/061
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A voltage supply circuit has an energy reserve, which is charged by a voltage transformer, and a comparator circuit, which controls switching circuit components. When the supply voltage is at its nominal value, a first switching circuit component is closed, with the result, that the energy reserve is operated in open circuit and is charged by the voltage transformer. When the supply voltage drops below a threshold, the comparator circuit opens the first switching circuit component and closes a second switching circuit component with the result that, at this point, the charged energy reserve is available for the voltage supply to the circuit configuration normally supplied with voltage from the supply voltage and the voltage transformer is disconnected from the supply voltage.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.