Slater Matsil, LLP
Advanced load current monitoring circuit and method for a class-AB amplifier
In an embodiment, a class-AB amplifier includes: an output stage that includes a pair of half-bridges configured to be coupled to a load; and a current sensing circuit coupled to a first half-bridge of the pair of half-bridges. The current sensing circuit includes a resistive element and is configured to sense a load current flowing through the load by: mirroring a current flowing through a first transistor of the first half-bridge to generate a mirrored current, flowing the mirrored current through the resistive element, and sensing the load current based on a voltage of the resistive element.
STMICROELECTRONICS (SHENZHEN) R&D CO. LTD
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Ru Feng XiangSheng
Du Li