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:
May. 10, 2016
Filed:
Jul. 05, 2005
Paolo Cusinato, Villeneuve Loubet, FR;
Christian Sorace, Antibes, FR;
Frederic Kubelec, Antibes, FR;
Paolo Cusinato, Villeneuve Loubet, FR;
Christian Sorace, Antibes, FR;
Frederic Kubelec, Antibes, FR;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An amplifier () for voice or audio signals, and particularly for headset applications, uses a low gamplifier () for initially charging an output node (OUT) at the beginning of a power-on phase. After charging the output node, a main amplifier () is enabled to amplify the voice or audio signal. At power-down, a sample-and-hold circuit () drives an output transistor to discharge an AC coupling capacitor (). Thus, spikes at the output node are eliminated and an external filtering capacitor is not needed.