High frequency circuit using high output amplifier cell block and low output amplifier cell block
AssigneeKabushiki Kaisha Toshiba
InventorKeiichi Yamaguchi
Life of this patent
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Abstract
A high frequency circuit capable of realizing a power amplifier with a wide dynamic range in which it is hard to degrade the power addition efficiency at low output is formed by using a high output amplifier cell block configured to amplify input signals at a time of high output power, in which a DC power source voltage is supplied in parallel to first amplifier cells that are connected in parallel AC-wise with respect to input/output signals, and a low output amplifier cell block configured to amplify input signals at a time of low output power, in which a DC power source voltage is supplied in series to second amplifier cells that are connected in parallel AC-wise with respect to input/output signals.
Claims14
A high frequency circuit, comprising:
- a high output amplifier cell block configured to amplify input signals at a time of high output power, in which a DC power source voltage is supplied in parallel to first amplifier cells that are connected in parallel AC-wise with respect to input/output signals;
- a low output amplifier cell block configured to amplify the input signals at a time of low output power, in which the DC power source voltage is supplied in series to second amplifier cells that are connected in parallel AC-wise with respect to the input/output signals;
- a first connection unit configured to connect input sides of the high output amplifier cell block and the low output amplifier cell block with an input terminal from which the input signals are entered;
- and
- a second connection unit configured to connect output sides of the high output amplifier cell block and the low output amplifier cell block with an output terminal to which output signals are outputted.
A communication device, comprising:
- at least one antenna configured to transmit or receive radio signals;
- at least one power amplifier configured to amplify the radio signals to be transmitted or received by the at least one antenna, including a high frequency circuit formed by:
- a high output amplifier cell block configured to amplify input signals at a time of high output power, in which a DC power source voltage is supplied in parallel to first amplifier cells that are connected in parallel AC-wise with respect to input/output signal;
- a low output amplifier cell block configured to amplify the input signals at a time of low output power, in which the DC power source voltage is supplied in series to second amplifier cells that are connected in parallel AC-wise with respect to the input/output signals;
- a first connection unit configured to connect input sides of the high output amplifier cell block and the low output amplifier cell block with an input terminal from which the input signals are entered;
- and
- a second connection unit configured to connect output sides of the high output amplifier cell block and the low output amplifier cell block with an output terminal to which output signals are outputted;
- and
- a control unit configured to control the high output amplifier cell block and the low output amplifier cell block by putting either one of the high output amplifier cell block and the low output amplifier cell block in an amplification operation state and another one of the high output amplifier cell block and the low output amplifier cell block in a high impedance state.
Dependencies are inferred from the claim text.