Patents by Inventor Sam Kang

Sam Kang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Transient voltage suppressor
    Patent number: 9025296
    Abstract: A transient voltage suppressor may include a silicon controlled rectifier (SCR) having an anode coupled to Vcc. The SCR may include a PNP transistor (Q2) and an NPN transistor (Q3), the PNP transistor having a base in common with a collector of the NPN transistor and the PNP transistor having a collector in common with a base of the NPN transistor. The TVS may further include a Zener diode having an anode and cathode, wherein the anode is directly coupled to the base of the NPN transistor and/or the cathode is directly coupled to the base of the PNP transistor, and an additional NPN transistor (Q1). The cathode of the SCR may be directly coupled to a base of the additional NPN transistor, and a collector and emitter of the additional NPN transistor may be directly coupled in series between VCC and ground.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: May 5, 2015
    Assignee: Littelfuse, Inc.
    Inventors: John M. Jorgensen, Sam Kang, Chad N. Marak, James Lu
  • TRANSIENT VOLTAGE SUPPRESSOR
    Publication number: 20120176718
    Abstract: A transient voltage suppressor may include a silicon controlled rectifier (SCR) having an anode coupled to Vcc. The SCR may include a PNP transistor (Q2) and an NPN transistor (Q3), the PNP transistor having a base in common with a collector of the NPN transistor and the PNP transistor having a collector in common with a base of the NPN transistor. The TVS may further include a Zener diode having an anode and cathode, wherein the anode is directly coupled to the base of the NPN transistor and/or the cathode is directly coupled to the base of the PNP transistor, and an additional NPN transistor (Q1). The cathode of the SCR may be directly coupled to a base of the additional NPN transistor, and a collector and emitter of the additional NPN transistor may be directly coupled in series between VCC and ground.
    Type: Application
    Filed: January 5, 2012
    Publication date: July 12, 2012
    Applicant: Littelfuse, Inc.
    Inventors: John M. Jorgensen, Sam Kang, Chad N. Marak, James Lu