Supply modulator and communication device including the same
AssigneeSamsung Electronics Co., Ltd.
InventorsDong-su KIM, Ji-seon PAEK
Life of this patent
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Abstract
A supply modulator includes: a voltage generator including output terminals respectively outputting voltages having different levels, and configured to select, in response to a selection control signal corresponding to an envelope signal, at least one of the voltages as a selection supply voltage and to generate the selection supply voltage by performing DC-DC conversion on a power supply voltage; and a switch unit configured to connect an output terminal through which the selection supply voltage is output to a power amplifier, in response to a connection control signal corresponding to the envelope signal.
Claims20
A supply modulator comprising:
- a voltage generator, which includes a plurality of output terminals configured to respectively output voltages having different levels, and is configured to select, in response to a first selection control signal corresponding to a first envelope signal, at least one of the voltages as a first selection supply voltage and generate the first selection supply voltage by performing DC-DC conversion on a supply voltage input from a power supply;
- and
- a switch unit configured to connect an output terminal, of the plurality of output terminals, through which the first selection supply voltage is output to a first power amplifier, in response to a first connection control signal corresponding to the first envelope signal.
A communication device comprising:
- a modem configured to generate a transmission signal and an envelope signal corresponding to the transmission signal;
- a radio frequency (RF) signal generator configured to receive the transmission signal and generate an RF input signal based on the transmission signal;
- a supply modulator comprising voltage generation circuits respectively generating voltages having different levels, and configured to select one of the voltage generation circuits as a first selection voltage generation circuit based on the envelope signal at a first supply voltage selection timing, and generate a supply voltage by using the first selection voltage circuit;
- and
- a power amplifier configured to generate an RF output signal by amplifying the RF input signal based on the generated supply voltage.
A supply modulator comprising:
- a voltage generator including:
- voltage generation circuits, each of the voltage generating circuits configured to generate a supply voltage of a different level based on respective envelope signals of received transmission signals, and
- output terminals, each of the output terminals connected to a respective voltage generating circuit to output the generated supply voltage;
- and
- a switch unit comprising switches, each of the switches configured to connect a power amplifier to a respective output terminal and provide, to the power amplifier, the generated supply voltage from the respective voltage generating circuit in correspondence to the respective envelope signals.
Dependencies are inferred from the claim text.