Method and apparatus for supplying voltage to amplifier using multiple linear regulators

An electronic device comprising:

• an antenna;
• an envelope-tracking (ET) modulator comprising at least one switching regulator;
• a first communication chip comprising a first amplifier, a first linear regulator operably connected to the first amplifier and the at least one switching regulator and configured to be supplied with a first voltage from the at least one switching regulator, and a second linear regulator operably connected to the first amplifier and the at least one switching regulator and configured to be supplied with a second voltage higher than the first voltage from the at least one switching regulator, the first communication chip configured to transmit a radio-frequency signal outside of the electronic device through the antenna;
• a second communication chip comprising a second amplifier, a third linear regulator operably connected to the second amplifier and the at least one switching regulator and configured to be supplied with a fifth voltage from the at least one switching regulator, and a fourth linear regulator operably connected to the second amplifier and the at least one switching regulator and configured to be supplied with a sixth voltage higher than the fifth voltage from the at least one switching regulator;
• and
• a control circuit,
• wherein the control circuit is configured to produce an envelope of an input signal input to the first amplifier in connection with the radio-frequency signal and to provide the produced envelope to at least one of the first linear regulator or the second linear regulator,
• wherein the first linear regulator is configured to provide a third voltage corresponding to the envelope to the first amplifier using the first voltage, based on the envelope having a voltage in a first range,
• wherein the second linear regulator is configured to provide a fourth voltage higher than the third voltage to the first amplifier using the second voltage, based on the envelope having a voltage in a second range comprising values greater than values included in the first range, and
• wherein the first amplifier, the first linear regulator, the second linear regulator are disposed inside the first communication chip, the second amplifier, the third linear regulator, and the fourth linear regulator are disposed inside the second communication chip, and the ET modulator is disposed outside the first and second communication chips.