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:
Mar. 19, 1991
Filed:
Aug. 25, 1989
Franz Ohms, Oberrot-Hausen, DE;
ANT Nachrichtentechnik GmbH, Backnang, DE;
Abstract
A switching regulator including a direct voltage source for producing an input voltage, an electronic switch connected between the voltage source and an output for switching the input voltage to the output, a pulse width modulator connected for controlling the electronic switch, a sawtooth signal generator connected for feeding the pulse width modulator a sawtooth signal of constant maximum amplitude, and a proportional signal circuit connected for feeding the pulse width modulator a signal proportional to current through the electronic switch. In order to suppress interference components on the direct input voltage, the switching regulator additionally includes a further signal circuit connected for feeding the pulse width modulator a further signal having an amplitude which is a function of the magnitude of the input voltage of the voltage source, and controllable signal circuitry for selectively choosing the amplitudes of the signals fed to the pulse width modulator in such a way that the arithmetic mean of the current through the inductance of the switching regulator is maintained constant.