Multi-mode bypass driver amplifier with tunable load matching

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 tu...

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Bibliographic Details
Main Authors PLETCHER NATHAN M, ZHAO YU
Format Patent
LanguageEnglish
Published 04.03.2014
Subjects
AMPLIFIERS
ANTENNAS, i.e. RADIO AERIALS
BASIC ELECTRIC ELEMENTS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
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Summary: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.
Bibliography:Application Number: US201213356492