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.
Claims44
A power amplifier comprising:
- a first amplifier;
- a first switch having a single-pole node and two or more multi-throw nodes, the single-pole node being connected to an output side of the first amplifier,
- a second amplifier which is connected to at least one of the multi-throw nodes of the first switch;
- and
- an output matching circuit which is connected to at least another multi-throw node of the first switch,
- wherein the second amplifier receives and outputs a signal having a first frequency and the output matching circuit receives and outputs a signal having a second frequency, the first frequency and the second frequency being different from each other.
A power amplifier comprising:
- a first amplifier;
- a first switch having a single-pole node and two or more multi-throw nodes, the single-pole node being connected to an output side of the first amplifier;
- a second amplifier which is connected to at least one of the multi-throw nodes of the first switch;
- and
- a third amplifier which is connected to at least another multi-throw node of the first switch,
- wherein the second amplifier receives and outputs a signal having a first frequency and the third amplifier receives and outputs a signal having a second frequency, the first frequency and the second frequency being different from each other.
A power amplifier comprising:
- an amplifier;
- a first switch having a single-pole node and two or more multi-throw nodes, the single-pole node being connected to an output side of the amplifier;
- and
- a first output matching circuit which is connected to at least one of the multi-throw nodes of the first switch;
- and
- a second output matching circuit which is connected to at least another multi-throw node of the first switch,
- wherein the first output matching circuit receives and outputs a signal having a first frequency and the second output matching circuit receives and outputs a signal having a second frequency, the first frequency and the second frequency being different from each other.
A power amplifier comprising:
- a first amplifier;
- a first switch having a single-pole node and two or more multi-throw nodes, the single-pole node being connected to an output side of the first amplifier,
- a second amplifier which is connected to at least one of the multi-throw nodes of the first switch;
- an output matching circuit which is connected to at least another multi-throw node of the first switch;
- a second switch having a single-pole node and two or more multi-throw nodes, wherein an output side of the second amplifier is connected to one of the multi-throw nodes of the second switch and an output side of the output matching circuit is connected to another multi-throw node of the second switch;
- and
- a power supply controller for controlling a power to be supplied to the second amplifier in response to switching of the first switch.
A power amplifier comprising:
- a first amplifier;
- a first switch having a single-pole node and two or more multi-throw nodes, the single-pole node being connected to an output side of the first amplifier;
- a second amplifier which is connected to at least one of the multi-throw nodes of the first switch;
- a third amplifier which is connected to at least another multi-throw node of the first switch;
- a second switch having a single-pole node and two or more multi-throw nodes, wherein an output side of the second amplifier is connected to one of the multi-throw nodes of the second switch and an output side of the third amplifier is connected to another multi-throw node of the second switch;
- and
- a power supply controller for controlling a power to be supplied to at least one of the second amplifier and the third amplifier in response to switching of the first switch.
Dependencies are inferred from the claim text.