Semiconductor circuit and semiconductor device

Abstract

A semiconductor device includes a power source line connected in series to a plurality of power source supply portions; a semiconductor chip including a first communication circuit connected to a lower stage semiconductor chip, a second communication circuit connected to a higher stage semiconductor chip, and a terminal connected to the second communication circuit; and a connecting line directly connected to the power source line and the terminal of the semiconductor chip without disposing any grounded circuitry element in parallel to the terminal and the power source line.

What is claimed is: 
     
         1 . A semiconductor device comprising:
 a power source line connected in series to a plurality of power source supply portions;   a semiconductor chip including a first communication circuit connected to a lower stage semiconductor chip, a second communication circuit connected to a higher stage semiconductor chip, and a terminal connected to the second communication circuit; and   a connecting line directly connected to the power source line and the terminal of the semiconductor chip without disposing any grounded circuitry element in parallel to the terminal and the power source line.   
     
     
         2 . The semiconductor device according to  claim 1 , wherein said first communication circuit and said second communication circuit are configured to operate according to a differential signal. 
     
     
         3 . The semiconductor device according to  claim 1 , further comprising a selection circuit connected to each of the power source supply portions through a filter for selecting one of the power source supply portions.