Multi-mode bypass driver amplifier with tunable load matching
First Claim
1. An apparatus comprising:
- a driver amplifier in a multi-mode bypass transmit path configured to amplify an input radio frequency (RF) signal and provide an amplified RF signal, the multi-mode bypass transmit path exclusive of a power amplifier; and
a tunable impedance matching circuit coupled to the driver amplifier and configured to match an output impedance of the driver amplifier for each of a plurality of modes of the driver amplifier.
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Accused Products
Abstract
A multi-mode driver amplifier with tunable load matching is disclosed. In an exemplary design, an apparatus includes a multi-mode driver amplifier and a tunable impedance matching circuit. The driver amplifier amplifies an input radio frequency (RF) signal and provides an amplified RF signal. The tunable impedance matching circuit matches an output impedance of the driver amplifier. The apparatus may include a main transmit path and a bypass transmit path. The bypass transmit path may include the driver amplifier and the tunable impedance matching circuit and no power amplifier. The main transmit path may include a second driver amplifier and a power amplifier. The main transmit path may be selected for transmit power levels higher than a threshold level, and the bypass transmit path may be selected for transmit power levels lower than the threshold level.
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Citations
20 Claims
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1. An apparatus comprising:
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a driver amplifier in a multi-mode bypass transmit path configured to amplify an input radio frequency (RF) signal and provide an amplified RF signal, the multi-mode bypass transmit path exclusive of a power amplifier; and a tunable impedance matching circuit coupled to the driver amplifier and configured to match an output impedance of the driver amplifier for each of a plurality of modes of the driver amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method comprising:
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amplifying an input radio frequency (RF) signal with a driver amplifier in a multi-mode bypass transmit path to obtain an amplified RF signal, the multi-mode bypass transmit path exclusive of a power amplifier; and matching an output impedance of the driver amplifier with a tunable impedance matching circuit coupled to the driver amplifier for each of a plurality of modes of the driver amplifier. - View Dependent Claims (16, 17, 18)
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19. An apparatus comprising:
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means for amplifying an input radio frequency (RF) signal in a multi-mode bypass transmit path to obtain an amplified RF signal, the multi-mode bypass transmit path exclusive of a power amplifying means; and means for matching an output impedance of the means for amplifying, the means for matching the output impedance coupled to the means for amplifying for each of a plurality of modes of the means for amplifying. - View Dependent Claims (20)
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Specification