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:
Feb. 14, 2012
Filed:
Jul. 07, 2011
Chiang Pu, San Jose, CA (US);
Ming-chieh Huang, San Jose, CA (US);
Chan-hong Chern, Palo Alto, CA (US);
Tien-chun Yang, San Jose, CA (US);
Chiang Pu, San Jose, CA (US);
Ming-Chieh Huang, San Jose, CA (US);
Chan-Hong Chern, Palo Alto, CA (US);
Tien-Chun Yang, San Jose, CA (US);
Abstract
Some embodiments regard a circuit comprising: a high voltage transistor providing a resistance; an amplifier configured to receive a current and to convert the current to a first voltage that is used in a loop creating the current; and an automatic level control circuit that, based on an AC amplitude of the first voltage, adjusts a second voltage at a gate of the high voltage transistor and thereby adjusts the resistance and the first voltage; wherein the automatic level control circuit is configured to adjust the first voltage toward the first reference voltage if the first voltage differs from a first reference voltage.