Apparatus, system, and method for measuring power delivered to a load
First Claim
1. An apparatus, comprising:
- a first circuit comprising a first element having an electrical impedance and having an input node to receive a signal and an output node to couple to a load;
a sensing circuit coupled to said input node and said output node to sense a differential voltage between said input and output nodes and to sense a detected voltage at said input node; and
a multiplier circuit to receive said differential voltage and to receive said detected voltage, said multiplier circuit to provide an output voltage proportional to an instantaneous power delivered to said load based on said differential voltage, said detected voltage, and said impedance of said first element of said first circuit.
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Accused Products
Abstract
Apparatus, system, and method including a circuit including an element having an electrical impedance, an input node to receive a signal, and an output node to couple to a load; a sensing circuit coupled to the input node and the output node to sense a differential voltage between the input and output nodes and to sense a detected voltage at the input node; and a multiplier circuit to receive the differential voltage and to receive the detected voltage. The multiplier circuit provides an output voltage proportional to the instantaneous power delivered to the load based on the differential voltage, the detected voltage, and the impedance of the element. A system may further include a radio frequency (RF) power amplifier (PA). A method may further include controlling a gain of the RF PA to maintain the power delivered to the load at a predetermined level based on the output voltage of the multiplier circuit.
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Citations
24 Claims
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1. An apparatus, comprising:
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a first circuit comprising a first element having an electrical impedance and having an input node to receive a signal and an output node to couple to a load;
a sensing circuit coupled to said input node and said output node to sense a differential voltage between said input and output nodes and to sense a detected voltage at said input node; and
a multiplier circuit to receive said differential voltage and to receive said detected voltage, said multiplier circuit to provide an output voltage proportional to an instantaneous power delivered to said load based on said differential voltage, said detected voltage, and said impedance of said first element of said first circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system, comprising:
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a radio frequency (RF) power amplifier (PA); and
a circuit, wherein said circuit comprises;
a first circuit comprising a first element having an electrical impedance and having an input node to receive a signal and an output node to couple to a load;
a sensing circuit coupled to said input node and said output node to sense a differential voltage between said input and output nodes and to sense a detected voltage at said input node; and
a multiplier circuit to receive said differential voltage and to receive said detected voltage, said multiplier circuit to provide an output voltage proportional to an instantaneous power delivered to said load based on said differential voltage, said detected voltage, and said impedance of said first element of said first circuit. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method, comprising:
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sensing a differential voltage across an element between an input node and a load;
sensing a detected voltage at said input node;
multiplying said differential voltage and said detected voltage;
determining power delivered to said load based on said multiplied differential and detected voltages and an impedance of said element; and
providing an output voltage that is proportional to said power. - View Dependent Claims (22, 23, 24)
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Specification