Title:
SWITCHING IN AMPLIFIER WITH CONFIGURABLE FINAL OUTPUT STAGE
Document Type and Number:
WIPO Patent Application WO/2018/191119
Kind Code:
A3
Abstract:
An amplifier may include a final output stage switchable among a plurality of modes comprising a mode which is enabled by coupling an output driver to an output of the final output stage and a preconditioning circuit coupled to the output of the final output stage. The preconditioning circuit may be configured to precondition at least one of a voltage and a current of the output of the final output stage prior to coupling the output driver to the output of the final output stage to limit audio artifacts caused by switching the final output stage to the mode or may be configured to perform a switching sequence to switch between a first mode and a second mode of the plurality of modes, such that at all points of the switching sequence, output terminals of the output of the final output stage have a known impedance.
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Inventors:
ZHU LEI (US)
ZHAO XIN (US)
MORTON ALAN MARK (US)
DAS TEJASVI (US)
HE KU (US)
FEI XIAOFAN (US)
ZHAO XIN (US)
MORTON ALAN MARK (US)
DAS TEJASVI (US)
HE KU (US)
FEI XIAOFAN (US)
Application Number:
PCT/US2018/026486
Publication Date:
November 29, 2018
Filing Date:
April 06, 2018
Export Citation:
Assignee:
CIRRUS LOGIC INT SEMICONDUCTOR LTD (GB)
ZHU LEI (US)
ZHU LEI (US)
International Classes:
H03F1/02; H03F3/217; H03F3/30
Foreign References:
| US20070018719A1 | 2007-01-25 | |||
| US6366162B1 | 2002-04-02 |
Attorney, Agent or Firm:
PREWITT, Brian K. et al. (US)
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