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US 2022/0103957 A1Published application
Monitoring circuitry
AssigneeCirrus Logic International Semiconductor Ltd.
InventorJohn P. LESSO
Life of this patent
Estimating the term…
Abstract
Monitoring circuitry, comprising: a current monitoring unit operable to monitor a speaker current flowing through a speaker and generate a monitor signal indicative of that current; and a controller operable, based on a control signal, to control the current monitoring unit to control whether the monitor signal is generated and/or a property of the monitor signal.
Claims22
Monitoring circuitry, comprising:
- a current monitoring unit operable to monitor a speaker current flowing through a speaker and generate a monitor signal indicative of that current;
- and
- a controller operable, based on a control signal, to control the current monitoring unit to control whether the monitor signal is generated and/or a property of the monitor signal;
- wherein:
- the current monitoring unit comprises a current mirror operable to generate a mirror current which mirrors said speaker current, a magnitude of the mirror current dependent on a magnitude of the speaker current due to current mirroring;
- the monitor signal is, or is generated from, the mirror current;
- and
- the controller is operable, based on the control signal, to control the current mirror and/or generation of the monitor signal from the mirror current to control whether the monitor signal is generated and/or a property of the monitor signal.
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Dependencies are inferred from the claim text.