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:
Dec. 05, 2017
Filed:
Apr. 28, 2015
Applicant:
Alfred E. Mann Foundation for Scientific Research, Santa Clarita, CA (US);
Inventor:
Edward K. F. Lee, Fullerton, CA (US);
Assignee:
The Alfred E. Mann Foundation For Scientific Research, Santa Clarita, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 27/42 (2006.01); H01F 37/00 (2006.01); H01F 38/00 (2006.01); H02J 5/00 (2016.01); H02M 3/335 (2006.01); H02J 17/00 (2006.01); H01F 38/14 (2006.01);
U.S. Cl.
CPC ...
H02J 5/005 (2013.01); H02J 17/00 (2013.01); H02M 3/33507 (2013.01); H01F 38/14 (2013.01);
Abstract
A feedback controlled coil driver with ASK modulation is disclosed. A class E coil driver drives an LC circuit to generate a magnetic signal via the inductor. A modulation capacitor is coupled to the LC circuit to modulate the coil driver signal. The voltage across the coil driver switch is sampled. The difference between the sampled voltage and a reference voltage is integrated and compared to a ramp voltage to obtain an optimal on time for the coil driver switch such that coil current is maximized.