Amplifier circuit

An amplifier circuit comprising:

• an input terminal configured to receive an input signal;
• an output terminal configured to output an output signal;
• an amplification unit comprising:
• an input terminal coupled to the input terminal of the amplifier circuit;
• an output terminal coupled to the output terminal of the amplifier circuit;
• a first terminal coupled to a first voltage terminal, wherein the first voltage terminal provides an operating voltage;
• and
• a second terminal coupled to a second voltage terminal;
• a first phase adjustment unit comprising a variable impedance component, a first terminal and a second terminal;
• and
• a third phase adjustment unit comprising a variable capacitor, a first terminal and a second terminal;
• wherein the first terminal of the first phase adjustment unit is coupled to the first terminal of the amplification unit, and the second terminal of the first phase adjustment unit is coupled to the input terminal of the amplification unit;
• wherein the first terminal of the third phase adjustment unit is coupled to the input terminal of the amplification unit, and the second terminal of the third phase adjustment unit is coupled to the second terminal of the amplification unit;
• wherein when the amplifier circuit is operated in a first mode, the output signal has a first phase,
• when the amplifier circuit is operated in a second mode, the output signal has a second phase;
• and
• a difference between the first phase and the second phase is within a predetermined range.

An amplifier circuit comprising:

• an input terminal configured to receive an input signal;
• an output terminal configured to output an output signal;
• an amplification unit comprising:
• an input terminal coupled to the input terminal of the amplifier circuit;
• an output terminal coupled to the output terminal of the amplifier circuit;
• a first terminal coupled to a first voltage terminal, wherein the first voltage terminal provides an operating voltage;
• a second terminal coupled to a second voltage terminal;
• a fourth transistor comprising a first terminal, a second terminal coupled to the second terminal of the amplification unit, and a control terminal coupled to the input terminal of the amplification unit;
• a fifth transistor comprising a first terminal coupled to the first terminal of the fourth transistor, a second terminal coupled to the second terminal of the fourth transistor, and a control terminal coupled to the control terminal of the fourth transistor;
• and
• a sixth transistor comprising a first terminal coupled to the first terminal and the output terminal of the amplification unit, a second terminal coupled to the first terminal of the fourth transistor, and a control terminal;
• and
• a first phase adjustment unit comprising a variable impedance component, a first terminal and a second terminal;
• wherein the first terminal of the first phase adjustment unit is coupled to the first terminal of the amplification unit, and the second terminal of the first phase adjustment unit is coupled to the input terminal of the amplification unit;
• wherein when the amplifier circuit is operated in a first mode, the output signal has a first phase, and when the amplifier circuit is operated in a second mode, the output signal has a second phase;
• and
• a difference between the first phase and the second phase is within a predetermined range.