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:
Jul. 21, 2009
Filed:
Feb. 04, 2008
Giovanni Stochino, 1-00176 Roma, IT;
Secondo Porra′, 08048 Nuoro, IT;
Giovanni Stochino, 1-00176 Roma, IT;
Secondo Porra′, 08048 Nuoro, IT;
Other;
Abstract
The invention concerns an audio power amplifier apparatus capable of providing at low manufacturing cost extremely low non-linear distortion, even lower than −120 dB, comprising a main power amplifying section the output of which is series connected to a secondary of a coupling transformer T, in turn connected to the apparatus output, the apparatus being characterized in that the amplifying section provides an output signal Vma having a negative feed-back loop non-inverting gain, and in that it further comprises a cascade of one or more sections, the inputs of which are connected to the output of the input section and to the output of the amplifying section, and the output of which is constituted of a secondary winding of the transformer T, the cascade being capable to very accurately extract the error signal Ve with respect to the amplified signal Vi from the signal at the output of the amplifying section and to to provide to its output an exact, but anti-phase, copy thereof in a predetermined very wide frequency band, so as to carry out a feed-forward error correction function that, for the first time, is particularly effective in cancelling the error of the amplifying section without interactions with the same and in a very wide frequency band, and in avoiding in a very stable and reliable way, any risk of stress and overload for the transformer T
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile