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US 2022/0231680 A1Published application
Opamp overload power limit circuit, system, and a method thereof
AssigneeTexas Instruments Incorporated
InventorsSudarshan UDAYASHANKAR, Martijn Fridus SNOEIJ
Life of this patent
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Abstract
An amplifier overload power limit circuit, system, and a method thereof comprising a monitoring of a current gain of a BJT based on a current detector and limiting power to the BJT based on the monitored current gain to prevent the BJT from driven into a saturation mode and the amplifier overdrive.
Claims18
A BJT amplifier system comprising,
- a BJT amplifier with a BJT;
- a current detector coupled to the BJT amplifier;
- and
- a limiting circuit coupled to the BJT amplifier and the current detector.
1 more element
A BJT amplifier system comprising,
- a BJT amplifier with a BJT;
- a current detector coupled to the BJT amplifier;
- a limiting circuit coupled to the BJT amplifier and the current detector, and
- a comparator;
- wherein the current detector comprising,
- a base current sensor coupled to a base node of the BJT;
- an emitter current sensor coupled to an emitter node of the BJT;
- and
- a comparator coupled to the base current sensor, the emitter current sensor, and the limiting circuit.
6 more elements
Dependencies are inferred from the claim text.