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:
Oct. 16, 2001
Filed:
Mar. 17, 2000
Applicant:
Inventor:
Nicky M. Johnson, Los Altos, CA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/45 ; H03F 3/68 ;
U.S. Cl.
CPC ...
H03F 3/45 ; H03F 3/68 ;
Abstract
An audio-frequency power bridged amplifier operates without a negative rail when responding to non-negative input signals, e.g. input signals ranging from zero to five volts. The amplifier also eliminates the problem of one differential rail being clipped before the other differential rail. When combined with a tracking circuit to form a Class H amplifier, the Class H amplifier operates with two positive rails rather than the two positive and two negative rails conventionally used with Class H amplifiers.