The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 21, 2000
Filed:
Feb. 25, 1998
Gunter Fendt, Schrobenhausen, DE;
Norbert Muller, Schrobenhausen, DE;
Temic Telefunken microelectronic GmbH, Heilbronn, DE;
Abstract
The invention describes a circuit layout for generating a supply DC voltage in a dependent relationship to a non-constant input DC voltage in three voltage intervals, with the supply voltage being maintained at a constant nominal value in the intermediate voltage interval, and with the supply voltage being reduced by constant differential values in the other two voltage intervals in order to allow emergency functions to the maintained; implementation is effected by means of a diode arrangement for the first differential value, by means of a first Zener diode arrangement for maintaining the constant value, and by means of a second Zener diode arrangement for bridging the diode arrangement. In addition, a process will be described for generating an output voltage with superimposed current pulses for a signal generator unit which process will feed in such a supply voltage via a control circuit. The circuit layout according to this invention is particularly suitable for implementing this process.