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:
Jun. 25, 2019
Filed:
Apr. 26, 2018
Synaptics Incorporated, San Jose, CA (US);
SYNAPTICS INCORPORATED, San Jose, CA (US);
Abstract
Systems and methods are provided for improved stability of audio amplifiers that incorporate external speaker connectivity. In one example, a system includes an audio amplifier circuit comprising two or more amplifier stages and a stability resistor and configured to receive an audio input signal, the audio amplifier circuit configured for at least two modes of operation, a first mode having a high input transconductance and the stability resistor is coupled to an output of the audio amplifier circuit, and a second mode having a lower input transconductance and the stability resistor is decoupled from the output of the audio amplifier circuit. The system further includes an amplitude detection circuit configured to provide a signal mode detection signal, an amplifier switching circuit configured to adjust a variable input transconductance of at least one of the amplifier stages, and a load switching circuit configured to couple and decouple the stability resistor at the output of the audio amplifier circuit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile