Multi-stage impedance matching
First Claim
1. An apparatus comprising:
- a first matching circuit comprising multiple stages configured for selectively coupling in series;
a second matching circuit comprising multiple stages configured for selectively coupling in series;
an amplifier coupled to the first and second matching circuits, the first matching circuit provides input impedance matching for the amplifier, and the second matching circuit provides output impedance matching for the amplifier; and
a selectable signal path from within the first matching circuit to within the second matching circuit that bypasses the amplifier.
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Accused Products
Abstract
Exemplary techniques for performing impedance matching are described. In an exemplary embodiment, the apparatus may include an amplifier (e.g., a power amplifier) coupled to first and second matching circuits. The first matching circuit may include multiple stages coupled to a first node and may provide input impedance matching for the amplifier. The second matching circuit may include multiple stages coupled to a second node and may provide output impedance matching for the amplifier. At least one switch may be coupled between the first and second nodes and may bypass or select the amplifier. The first and second nodes may have a common impedance. The apparatus may further include a second amplifier coupled in parallel with the amplifier and further to the matching circuits. The second matching circuit may include a first input stage coupled to the amplifier, a second input stage coupled to the second amplifier, and a second stage coupled to the two input stages via switches.
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Citations
27 Claims
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1. An apparatus comprising:
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a first matching circuit comprising multiple stages configured for selectively coupling in series; a second matching circuit comprising multiple stages configured for selectively coupling in series; an amplifier coupled to the first and second matching circuits, the first matching circuit provides input impedance matching for the amplifier, and the second matching circuit provides output impedance matching for the amplifier; and a selectable signal path from within the first matching circuit to within the second matching circuit that bypasses the amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A wireless communication device comprising:
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a first matching circuit comprising multiple stages configured for selectively coupling in series and to a first node; a second matching circuit comprising multiple stages configured for selectively coupling in series and to a second node; a power amplifier coupled to the first and second matching circuits, the first matching circuit provides input impedance matching for the power amplifier, and the second matching circuit provides output impedance matching for the power amplifier; and at least one switch coupled between the first and second nodes and to bypass or select the power amplifier. - View Dependent Claims (20, 21, 22)
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23. A method of performing impedance matching, comprising:
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performing input impedance matching for an amplifier with a first matching circuit comprising multiple stages configured for selectively coupling in series; performing output impedance matching for the amplifier with a second matching circuit comprising multiple stages configured for selectively coupling in series; and selectively bypassing the amplifier from within the first matching circuit to within the second matching circuit. - View Dependent Claims (24, 25, 26)
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27. An apparatus comprising:
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means for performing input impedance matching for an amplifier with a first matching circuit comprising multiple stages configured for selectively coupling in series; means for performing output impedance matching for the amplifier with a second matching circuit comprising multiple stages configured for selectively coupling in series; and means for selectively bypassing the amplifier from within the first matching circuit to within the second matching circuit.
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Specification