Patent ID: 6600376
Filing Date: 2003-07-29
Classification: H03F

Abstract:
A high efficiency amplifier system comprising:a signal producer for generating a synchronized sine-wave reference signal and input signal; a pulse-width-modulation (PWM) signal producer for receiving a D.C. reference potential and generating a first PWM signal according to the D.C. reference potential, and generating a second PWM signal and a logic control signal according to the sine-wave reference signal; a power circuit for receiving an input power and modulating the input power to a pair of a stable D.C. powers according to the first PWM signal, and modulating the pair of the stable D.C. power to a quasi-sine wave power with a same phase as the sine-wave reference signal according to the second PWM signal and the logic control signal generated; a feedback circuit for receiving the quasi-sine wave power and generating a first feedback signal, wherein the first feedback signal is sent to said PWM signal producer for comparison with the sine-wave reference signal to generate the second PWM signal, the second PWM signal is sent to said power circuit to tune the quasi-sine wave power, said feedback circuit also receives the pair of the stable D.C. powers and generates a second feedback signal, and the second feedback signal is sent to said PWM signal producer for comparison with the D.C. reference potential for generating the first PWM signal to send to said power circuit to tune the pair of the stable D.C. powers; and an amplifier circuit for receiving the quasi-sine wave power as the supply power and amplifying the input signal.