Patent ID: 7224221
Filing Date: 2007-05-29
Classification: H03F,H03G,H04B

Abstract:
1. A power amplification apparatus comprising: a first amplification element for amplifying an input signal; a second amplification element for further amplifying the input signal amplified in the first amplification element and supplying to a first output terminal; a first switch element performing on/off operation based on a control signal for setting the second amplification element in an operating condition by supplying the input signal from the first amplification element when on operation, and setting the second amplification element in a non-operating condition by not supplying the input signal from the first amplification element when off operation; and a second switch element performing on/off operation based on a control signal but opposite to the operation of the first switch element for supplying the input signal from the first amplification element to a second output terminal when on operation, and for stopping the supply of the input signal to the second output terminal when off operation.