Patent ID: 6744318
Filing Date: 2004-06-01
Classification: H03F

Abstract:
A digital power amplifier comprising:four switches SW1, SW2, SW3 and SW4 connected in a bridge arrangement; a load connecting section provided between a connection point of adjacent switches SW1 and SW2 and a connection point of adjacent switches SW3 and SW4 to connect a load; a power source connecting section provided between a connection point of adjacent switches SW1 and SW4 and a connection point of adjacent switches SW2 and SW3 to apply a voltage; a grounding section grounding the connection point of the adjacent switches SW3 and SW4; signal processing unit for converting an input signal into a 4-line digital signal; driving unit for controlling opening-and-closing drive of the switches SW1, SW2, SW3 and SW4 according to a digital signal supplied from the signal processing unit; isolating unit for electrically isolating between the signal processing unit and the driving unit; and feed-back unit for feeding back a signal at the connection point of the adjacent switches SW1 and SW2 to the signal processing unit.