push-pull電路有什麼用途??

                    
                   VDD  
                   |   
            ____|/-|
           |    |\->
   in  ____|       |____ out
           |       |
           |____|/<-
                |\-|
                   |
                   GND

        如圖所示....當放大器用嗎??還有什麼好處呢??
            
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* Origin: 中山大學-美麗之島BBS * From: 218.168.212.128