Methods and apparatus to protect circuitry from overcurrent conditions
AssigneeTexas Instruments Incorporated
InventorsSupriyo Palit, Arthur Brown, Mohammad Atiqur Rahman
Life of this patent
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Abstract
An example apparatus includes: programmable circuitry configured to execute machine-readable instructions to: receive first voltages representative of an input signal; receive second voltages and currents, the second voltages and currents representative of voltages and currents of filter circuitry responsive to the first voltages; and determine a transfer function based on the first voltages and the second voltages and currents, the transfer function having coefficients representing the filter circuitry.
Claims18
An apparatus comprising:
- programmable circuitry configured to execute machine-readable instructions to:
- receive a first input signal having first voltages;
- receive second voltages and first currents, the second voltages and first currents representing voltages and currents of filter circuitry responsive to the first voltages;
- determine a transfer function based on the first voltages, second voltages, and first currents, the transfer function having coefficients representing the filter circuitry;
- and
- predict second currents based on third voltages and the coefficients of the transfer function, the third voltages representing a second input signal subsequent to the first input signal.
A system comprising:
- filter circuitry having an input and an output;
- an amplifier having an input and an output, the output of the amplifier coupled to the input of the filter circuitry;
- and
- protection circuitry having an input and an output, the input of the protection circuitry coupled to the output of the filter circuitry, the output of the protection circuitry coupled to the input of the amplifier, the protection circuitry configured to:
- receive a sense voltage responsive to supplying an input signal, the sense voltage representing a voltage of the filter circuitry;
- predict a sense current based on the sense voltage and coefficients of a transfer function that represents the filter circuitry;
- receive the sense current responsive to supplying the input signal to the filter circuitry;
- and
- adjust the coefficients based on differences between the predicted sense current and the sense current of the filter circuitry.
At least one non-transitory computer readable storage medium comprising instructions that, when executed, cause programmable circuitry to at least:
- receive a first input signal;
- receive first voltages and first currents responsive to supplying the input first signal to an amplifier, the first voltages and first currents representing voltages and currents of filter circuitry;
- determine coefficients based on the first input signal, first voltages, and first currents, the coefficients of a transfer function representing the filter circuitry;
- and
- receive second voltages and second currents of the filter circuitry responsive to supplying a second input signal to the amplifier.
Dependencies are inferred from the claim text.