Inverted doherty-type amplifier device
AssigneeInfineon Technologies AG
InventorsRüdiger Bauder, Mikhail Shirokov
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Abstract
An inverted Doherty-type amplifier comprises a distribution network having a first input port; a main signal path coupled to a first output port of the distribution network, the main signal path comprising a main amplifier; a first peak signal path coupled to a second output port of the distribution network, the first peak signal path comprising a first phase adjustment network, a first peak amplifier having an input coupled to an output of the first phase adjustment network, and a second phase adjustment network having an input coupled to an output of the first peak amplifier; and a combining network coupled to an output of the main amplifier and an output of the second phase adjustment network.
Claims20
An inverted Doherty-type amplifier comprising:
- a distribution network comprising a first signal port configured to provide a first signal to a main path of the inverted Doherty-type amplifier from a received input signal, and a second signal port configured to provide a second signal to a peak path of the inverted Doherty-type amplifier from the received input signal;
- a first amplifier coupled to the first signal port and configured to amplify the first signal to obtain a first amplified signal;
- a first phase correction network coupled to the second signal port and configured to adjust a phase of a second signal to obtain a phase corrected second signal;
- a second amplifier, coupled to an output of the first phase correction network and configured to amplify the second phase corrected signal to obtain a second amplified signal;
- a second phase correction network coupled to an output of the second amplifier and configured to adjust a phase of the second amplified signal to obtain a phase corrected second amplified signal;
- a driver circuit in the peak path, wherein the first phase correction network is configured to at least partially compensate for a phase shift caused by the driver circuit;
- and
- a signal combiner having a first input coupled to an output of the first amplifier, and a second input coupled to an output of the second phase correction network, the signal combiner configured to combine a signal based on the first amplified signal and a signal based on the phase corrected second amplified signal to obtain a combined signal.
A method for amplifying a signal, the method comprising:
- providing a first signal for a main path of an inverted Doherty-type amplifier from a received input signal;
- and providing a second signal for a peak path of the inverted Doherty-type amplifier from the received input signal;
- amplifying a signal based on the first signal to obtain a first amplified signal;
- adjusting a phase of a signal based on the second signal to obtain a phase corrected second signal;
- amplifying a signal based on the phase corrected second signal to obtain a second amplified signal;
- adjusting a phase of a signal based on the second amplified signal to obtain a phase corrected second amplified signal;
- and
- at least partially compensating a phase shift caused by a driver circuit in the peak path using a phase correction network;
- and
- combining a signal based on the first amplified signal and a signal based on the phase corrected second amplified signal to obtain a combined signal.
An inverted Doherty-type amplifier, comprising:
- a distribution network having a first input port;
- a main signal path coupled to a first output port of the distribution network, the main signal path comprising a main amplifier;
- a first peak signal path coupled to a second output port of the distribution network, the first peak signal path comprising a first phase adjustment network, a first peak amplifier having an input coupled to an output of the first phase adjustment network, and a second phase adjustment network having an input coupled to an output of the first peak amplifier;
- and
- a combining network coupled to an output of the main amplifier and an output of the second phase adjustment network.
Dependencies are inferred from the claim text.