Power amplifier and radio communication device using the amplifier
First Claim
Patent Images
1. A power amplifier comprising:
- a first amplifier element configured to amplify a first input signal of a first frequency, the first amplifier element including a first input terminal which receives the first input signal, and a first output terminal which outputs a first output signal obtained by amplifying the first input signal;
a second amplifier element configured to amplify a second input signal of a second frequency, the second amplifier element including a second input terminal which receives the second input signal, and a second output terminal which outputs a signal obtained by amplifying the second input signal;
a power supply input terminal connected to a direct-current power supply;
a common power supply path including an end connected to the power supply input terminal, and another end;
a first individual power supply path including an end connected to the another end of the common power supply path, and another end connected to the first output terminal, the first individual power supply path having a first impedance; and
a second individual power supply path including an end connected to the another end of the common power supply path, and another end connected to the second output terminal, the second individual power supply path having a second impedance.
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Abstract
A power amplifier includes amplifier elements to amplify input signals of different frequencies. The amplifier also includes a power supply circuit that includes a common power supply path including an end connected to a power supply input terminal connected to a DC power supply. The amplifier further includes individual power supply paths each including an end connected to the other end of the common power supply path, and the other end connected to the main electrode of a corresponding one of the amplifier elements. The individual power supply paths have different impedances.
19 Citations
16 Claims
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1. A power amplifier comprising:
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a first amplifier element configured to amplify a first input signal of a first frequency, the first amplifier element including a first input terminal which receives the first input signal, and a first output terminal which outputs a first output signal obtained by amplifying the first input signal;
a second amplifier element configured to amplify a second input signal of a second frequency, the second amplifier element including a second input terminal which receives the second input signal, and a second output terminal which outputs a signal obtained by amplifying the second input signal;
a power supply input terminal connected to a direct-current power supply;
a common power supply path including an end connected to the power supply input terminal, and another end;
a first individual power supply path including an end connected to the another end of the common power supply path, and another end connected to the first output terminal, the first individual power supply path having a first impedance; and
a second individual power supply path including an end connected to the another end of the common power supply path, and another end connected to the second output terminal, the second individual power supply path having a second impedance. - View Dependent Claims (2, 3, 4, 5, 6, 15)
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7. A power amplifier comprising:
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a first amplifier element configured to amplify a first input signal of a first frequency, the first amplifier element including a first input terminal which receives the first input signal, and a first output terminal which outputs a first output signal obtained by amplifying the first input signal;
a second amplifier element configured to amplify a second input signal of a second frequency, the second amplifier element including a second input terminal which receives the second input signal, and a second output terminal which outputs a signal obtained by amplifying the second input signal;
a power supply input terminal connected to a direct-current power supply;
a common power supply path including an end connected to the power supply input terminal, and another end;
a first individual power supply path including an end connected to the another end of the common power supply path, and another end connected to the first output terminal, the first individual power supply path having a first impedance;
a second individual power supply path including an end connected to the another end of the common power supply path, and another end connected to the second output terminal, the second individual power supply path having a second impedance;
a first output matching circuit connected to the first output terminal of the first amplifier element; and
a second output matching circuit connected to the second output terminal of the second amplifier element. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 16)
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Specification
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Current AssigneeKabushiki Kaisha Toshiba (Toshiba Corporation)
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Original AssigneeKabushiki Kaisha Toshiba (Toshiba Corporation)
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InventorsKayano, Hiroyuki, Yamaguchi, Keiichi, Araki, Yuta
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Application NumberUS10/807,244Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current330/126CPC Class CodesH03F 1/0277 Selecting one or more ampli...H03F 2200/294 the amplifier being a low n...H03F 2200/372 Noise reduction and elimina...H03F 2200/429 Two or more amplifiers or o...H03F 3/68 Combinations of amplifiers,...H05K 1/0265 characterized by the lay-ou...H05K 1/165 incorporating printed induc...H05K 2201/09254 Branched layoutH05K 2201/09263 Meander
