Patent ID: 7692493

Claim:
A high-efficiency single-to-differential amplifier comprising: a first transistor having a first terminal for receiving an input signal, a second terminal, and a third terminal coupled to a second power supply; a second transistor having a first terminal, a second terminal for providing a first differential output signal, and a third terminal; a third transistor having a first terminal coupled to AC ground, a second terminal for providing a second differential output signal, and a third terminal coupled to the third terminal of the second transistor; a first choke coupled between the second terminal of the second transistor and a first power supply voltage; a second choke coupled between the second terminal of the third transistor and the first power supply voltage; a power coupling module coupled between the first terminal of the second transistor and the second terminal of the first transistor; and a tank coupled between the second terminal of the first transistor and the third terminal of the second transistor.