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:
Jul. 11, 2017
Filed:
Nov. 30, 2015
Ixys Corporation, Milpitas, CA (US);
Anatoliy V. Tsyrganovich, Woodside, CA (US);
Leonid A. Neyman, Sunnyvale, CA (US);
IXYS Corporation, Milpitas, CA (US);
Abstract
A rectifier includes a larger Field Effect Transistor (FET) and a smaller FET (FET). A sense resistor is in series with FET's body diode between a cathode terminal and an anode terminal. If the cathode terminal voltage is greater than the voltage on the anode terminal, then body diodes of FETs are reverse biased, the FETs are controlled to be off, and there is no current flow through the rectifier. If, however, the voltage on the anode terminal becomes positive with respect to the cathode terminal, then the body diode of FETstarts to conduct and there is a voltage drop across the sense resistor. A comparator detects this condition and turns both FETs on. The rectifier is then conductive, so current can flow from the anode terminal, through the larger FET, and to the cathode terminal, with a small forward voltage drop and without passing across the sense resistor.