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:
Apr. 19, 2005
Filed:
Oct. 29, 2003
Ordwin Haase, Taufkirchen, DE;
Ordwin Haase, Taufkirchen, DE;
Infineon Technologies AG, Munich, DE;
Abstract
A DC voltage chopper contains a power switch device with a drive circuit, an LC filter circuit connected in a main circuit of the power switch device, a commutating circuit connected in parallel to the LC filter circuit, and a comparison circuit with a hysteretic function and has an output connected to the drive circuit. A first input terminal of the comparison circuit is connected to an output terminal of the DC voltage chopper, and a second input terminal of the comparison circuit is connected to a reference voltage generator that generates a reference voltage. The drive circuit has a logic circuit with a first input receiving the output signal of the comparison signal of the comparison circuit, and a second input receiving a trigger clock signal with a fixed frequency. The DC voltage chopper combines the good attributes of hysteresis control with a fixed switching frequency.