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:
Dec. 01, 2020
Filed:
Oct. 07, 2019
Cirrus Logic International Semiconductor Ltd., Edinburgh, GB;
Gary Robertson, Edinburgh, GB;
Hamed Sadati, Edinburgh, GB;
Rupesh Khare, Edinburgh, GB;
Sameer Baveja, Edinburgh, GB;
Cirrus Logic, Inc., Austin, TX (US);
Abstract
This application relates to methods and apparatus for voltage control, and in particular to maintain safe voltages for components of audio driving circuits that are operable in a high voltage mode. An audio driving circuit () may include a power supply module () and may be operable such that, in use, a voltage magnitude at a source terminal of at least a first transistor () of the audio driving circuit can exceed its gate-source voltage tolerance. A voltage generator (P) is configured to output a first intermediate voltage (V) to an intermediate voltage path for use as a gate control voltage for at least the first transistor, to maintain its gate-source voltage below tolerance. An intermediate path voltage clamp (P) is provided for selectively clamping the intermediate voltage path to a voltage level, so as to maintain the magnitude of the gate-source voltage of the first transistor below tolerance. The voltage clamp (P) is enabled by a reset condition (RST) for the audio driving circuit.