SYSTEM AND METHOD FOR SENSING AN AMPLIFIER LOAD CURRENT
First Claim
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1. A method for sensing a load current that flows from an amplifier into a load of the amplifier, the method comprising:
- obtaining a voltage drop across internal impedance of the amplifier; and
computing the load current using the internal impedance and the voltage drop across the internal impedance.
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Abstract
A system and method for sensing a load current that flows from an amplifier into a load of the amplifier involves obtaining a voltage drop across internal impedance of the amplifier and computing the load current using the internal impedance and the voltage drop across the internal impedance.
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Citations
20 Claims
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1. A method for sensing a load current that flows from an amplifier into a load of the amplifier, the method comprising:
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obtaining a voltage drop across internal impedance of the amplifier; and computing the load current using the internal impedance and the voltage drop across the internal impedance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for sensing a load current that flows from an amplifier into a load of the amplifier, the system comprising:
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a voltage obtaining unit configured to obtain a voltage drop across internal impedance of the amplifier; and a computing unit configured to compute the load current using the internal impedance and the voltage drop across the internal impedance. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A system for sensing a load current that flows from an amplifier into a load of the amplifier, the system comprising:
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a digital signal source configured to generate a digital input voltage; a digital-to-analog converter configured to convert the digital input voltage into an analog input voltage, wherein the analog input voltage is applied to the amplifier to generate an analog output voltage; an analog-to-digital converter configured to convert the analog output voltage into a digital output voltage; and a digital signal processing module configured to multiply the digital input voltage by a gain factor of the amplifier to produce a voltage product, to calculate a voltage drop across internal impedance of the amplifier as a voltage difference between the digital output voltage and the voltage product, and to compute the load current using the voltage drop across the internal impedance and the internal impedance. - View Dependent Claims (18, 19, 20)
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Specification