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US 2021/0194477 A1Published application
Opamp overload power limit circuit, system, and a method thereof
AssigneeTexas Instruments Incorporated
InventorsSudarshan UDAYASHANKAR, Martijn Fridus SNOEIJ
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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 method for limiting power to a bipolar junction transistor (BJT) amplifier, comprising:
- monitoring a current gain of a BJT of the BJT amplifier;
- comparing the current gain with a preset value;
- and
- limiting a base current to the BJT based on the comparison.
1 more element
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,
- wherein the current detector is configured to detect a current gain of the BJT and enable or disable the limiting circuit based on the current gain, and the limiting circuit configured to limit the base current supply to the BJT based on the current gain when enabled.
2 more elements
Dependencies are inferred from the claim text.