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:
Jan. 15, 2008
Filed:
Jul. 11, 2001
Applicants:
Jeevan G. Bank, San Diego, CA (US);
James J. Croft, Iii, Poway, CA (US);
Inventors:
Jeevan G. Bank, San Diego, CA (US);
James J. Croft, III, Poway, CA (US);
Assignee:
American Technology Corporation, San Diego, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 3/00 (2006.01); H04B 5/00 (2006.01); H04R 27/00 (2006.01); H03F 3/38 (2006.01); H03F 1/04 (2006.01); H03F 3/217 (2006.01);
U.S. Cl.
CPC ...
Abstract
A power amplifier for a parametric loudspeaker system which utilizes switch-mode power conversion to increase efficiency. The power amplifier is configured to coordinate the switching frequency of the amplifier with the carrier frequency of the parametric loudspeaker system, so a lower switching frequency may be used even though the power amplifier must amplify ultrasonic signals. The amplifier can be further optimized to counteract the reactance of the transducer load at the carrier frequency.