Amplifier capable of canceling leakage components

A driver amplifier comprising:

• a plurality of unit amplifiers connected in parallel to each other through an input node and an output node, and configured to output differential output signals to the output node, and
• wherein at least one unit amplifier of the plurality of unit amplifiers comprises:
• a first-first (1-1) transistor and a first-second (1-2) transistor to which differential input signals are applied to gate terminals thereof through the input node, respectively;
• a second-first (2-1) transistor comprising:
• one end connected to the 1-1 transistor,
• a gate terminal configured to receive an operating signal, and
• the other end configured to output one of the differential output signals;
• a second-second (2-2) transistor comprising:
• one end connected to the 1-2 transistor,
• a gate terminal configured to receive the operating signal, and
• the other end configured to output the other one of the differential output signals;
• and
• a switch connected to one end of the 1-1 transistor and one end of the 1-2 transistor, and
• wherein the switch is configured to turn on based on the at least one unit amplifier being turned off.

An electronic device comprising:

• a processor;
• and
• a radio frequency (RF) chip configured to:
• generate an RF signal based on a baseband signal received from the processor, and
• adjust and output a gain of the RF signal through a driver amplifier comprising a plurality of unit amplifiers, and
• wherein at least one unit amplifier of the plurality of unit amplifiers comprises:
• a first-first (1-1) transistor and a first-second (1-2) transistor to which the RF signal is applied to respective gate terminals;
• a second-first (2-1) transistor comprising:
• one end connected to the 1-1 transistor,
• a gate terminal configured to receive an operating signal, and
• the other end configured to output one of differential output signals;
• a second-second (2-2) transistor comprising:
• one end connected to the 1-2 transistor,
• a gate terminal configured to receive the operating signal, and
• the other end configured to output the other one of the differential output signals;
• and
• a switch connected to one end of the 1-1 transistor and one end of the 1-2 transistor, and
• wherein the switch is configured to turn on based on the at least one unit amplifier being turned off.