ADAPTIVE TUNING OF AN IMPEDANCE MATCHING CIRCUIT IN A WIRELESS DEVICE
First Claim
1. An apparatus comprising:
- a memory configured to store information for a plurality of settings of an impedance matching circuit; and
a control unit configured to select one of the plurality of settings of the impedance matching circuit based on the information for the plurality of settings and measurements for the impedance matching circuit.
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Abstract
Techniques for adaptively tuning an impedance matching circuit are disclosed. In an aspect, the impedance matching circuit is pre-characterized. The performance of the impedance matching circuit is determined for multiple settings of the impedance matching circuit, stored in memory, and used to tune the impedance matching circuit. In another aspect, the impedance matching circuit is tuned based on measurements for one or more parameters such as delivered power, return loss, power amplifier current, antenna/load impedance, etc. In an exemplary design, an apparatus includes a memory and a control unit. The memory stores information for multiple settings of an impedance matching circuit. The control unit selects one of the multiple settings of the impedance matching circuit based on the information for the multiple settings and measurements for the impedance matching circuit. The impedance matching circuit performs impedance matching for a load circuit (e.g., an antenna) based on the selected setting.
60 Citations
26 Claims
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1. An apparatus comprising:
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a memory configured to store information for a plurality of settings of an impedance matching circuit; and a control unit configured to select one of the plurality of settings of the impedance matching circuit based on the information for the plurality of settings and measurements for the impedance matching circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus comprising:
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a load circuit; and an impedance matching circuit configured to perform impedance matching for the load circuit based on one of a plurality of settings selected for the impedance matching circuit based on information for the plurality of settings and measurements for the impedance matching circuit. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method of performing impedance matching, comprising:
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obtaining measurements for an impedance matching circuit; and selecting one of a plurality of settings of the impedance matching circuit based on information for the plurality of settings and the measurements for the impedance matching circuit. - View Dependent Claims (16, 17, 18, 19, 20)
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21. An apparatus comprising:
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means for obtaining measurements for an impedance matching circuit; and means for selecting one of a plurality of settings of the impedance matching circuit based on information for the plurality of settings and the measurements for the impedance matching circuit. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification