Multi mode power amplifier and communication unit
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMasaaki Nishijima, Taketo Kunihisa, Osamu Ishikawa
Life of this patent
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Abstract
A power amplifier including: a first amplifier PA2 having an input terminal and an output terminal; a passive circuit PC3 having an input terminal and an output terminal; and a first switch SW2 having a single-pole terminal and two multi-throw terminals, one of the multi-throw terminals of the first switch SW2 being connected to the input terminal of the first amplifier PA2 and the other of the multi-throw terminals of the first switch SW2 being connected to the input terminal of the passive circuit PC3. This makes it possible to provide a power amplifier and a communication unit which can be operated with different frequencies, output powers or modulation types.
Claims47
A power amplifier comprising:
- a first amplifier having an input terminal and an output terminal;
- a passive circuit having an input terminal and an output terminal;
- and
- a first switch having a single-pole terminal and two multi-throw terminals,
- wherein one of the multi-throw terminals of the first switch is connected to the input terminal of the first amplifier and the other of the multi-throw terminals of the first switch is connected to the input terminal of the passive circuit, the first switch is configured to be switched selectively based on at least one of a frequency of a signal input the single-pole terminal, a desired output power of the signal, and a modulation type of the signal, and the first amplifier and the passive circuit are configured to have different operating characteristics with respect to the at least one of a frequency of a signal input to the single-pole terminal, a desired output power of the signal, and a modulation type of the signal.
A power amplifier comprising:
- a first amplifier having an input terminal and an output terminal;
- a second amplifier having an input terminal and an output terminal;
- and
- a first switch having a single-pole terminal and two multi-throw terminals,
- wherein one of the multi-throw terminals of the first switch is connected to the input terminal of the first amplifier and the other of the multi-throw terminals of the first switch is connected to the input terminal of the second amplifier, the first switch is configured to be switched selectively based on at least one of a frequency of a signal input to the single-pole terminal, a desired output power of the signal, and a modulation type of the signal, and the first amplifier and the second amplifier are configured to have different operating characteristics with respect to the at least one of a frequency of a signal input to the signal pole terminal, a desired output power of the signal, and a modulation type of the signal.
A power amplifier comprising:
- a first passive circuit having an input terminal and an output terminal;
- a second passive circuit having an input terminal and an output terminal;
- a first switch having a single-pole terminal and two multi-throw terminals;
- and
- an amplifier having an input terminal and an output terminal;
- wherein one of the multi-throw terminals of the first switch is connected to the input terminal of the first passive circuit, the other of the multi-throw terminals of the first switch is connected to the input terminal of the second passive circuit and the output terminal of the amplifier is connected to the single-pole terminal of the first switch, the first switch is configured to be switched selectively based on at least one of a frequency of a signal input to the single-pole terminal, a desired output power of the signal, and a modulation type of the signal, and the first passive circuit and the second passive circuit are configured to have different operating characteristics with respect to the at least one of a frequency of a signal input to the single-pole terminal, a desired output power of the signal, and a modulation type of the signal.
Dependencies are inferred from the claim text.