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.

Date of Patent:
Aug. 05, 2025

Filed:

Sep. 22, 2023
Applicant:

Kinetic Technologies International Holdings Lp, Toronto, CA;

Inventors:

Hiu Fai Leung, Hong Kong, CN;

Chi Kin Wong, Hong Kong, CN;

King Chun Fung, Hong Kong, CN;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 9/00 (2006.01); H02H 9/04 (2006.01); H03K 17/06 (2006.01); H03K 17/081 (2006.01);
U.S. Cl.
CPC ...
H02H 9/005 (2013.01); H02H 9/046 (2013.01); H03K 17/063 (2013.01); H03K 17/08104 (2013.01);
Abstract

A transient voltage surge protection circuit includes a discharge transistor having a drain coupled to a first point of a voltage input bus, and a source coupled to ground; an RC string having a first capacitor and a first resistor coupled in series; a first charge transistor having a drain coupled to the drain of the discharge transistor, a source coupled to the gate of the discharge transistor, and a gate coupled to a mid-point between the first capacitor and the first resistor; a second charge transistor having a drain coupled to the drain of the discharge transistor and a gate coupled to the gate of the first charge transistor; a Zener diode string coupled to a second point of the voltage input bus and coupled to a third and fourth resistors in series. A midpoint between the third and fourth resistors is coupled to the second resistor.


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