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:
Nov. 05, 2013
Filed:
Mar. 15, 2010
Applicant:
Jimes Lei, Milpitas, CA (US);
Inventor:
Jimes Lei, Milpitas, CA (US);
Assignee:
Supertex, Inc., Sunnyvale, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04M 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A 5 Ringer Equivalent Number (REN) ringer circuit has a wave generator. A flip-flop is coupled to the wave generator and has a non-inverting and an inverting output. A high voltage level translator is coupled to each of the non-inverting and the inverting outputs of the flip-flop. A source follower buffer is coupled to an output of each of the high voltage level translators.