Patent ID: 6184737
Filing Date: 2001-02-06
Classification: H04L

Abstract:
A signal-transmission system comprising:signal-transmission lines including termination resistances which are connected to a terminal voltage;open-drain-type transistors;branch lines branching from said signal-transmission lines to connect said open-drain-type transistors with said signal-transmission lines;insertion resistances inserted in said branch lines at locations where said branch lines are connected to said signal-transmission lines; andan input buffer circuit connected to one of the branch lines to receive an input signal from said signal-transmission lines, the input signal having a voltage which deviates from a power voltage by a predetermined amount, said power voltage for driving said input buffer circuit, said input buffer circuit comprisinga level-shift circuit shifting voltage levels of said input signal and a reference voltage to produce a level-shifted signal voltage and a level-shifted reference voltage;a level adjustment circuit, connected to said level-shift circuit, and controlling said level-shift circuit such that said level-shifted reference voltage is adjusted to a predetermined target voltage; anda differential-amplifier circuit connected to said level-shift circuit and amplifying a difference between said level-shifted signal voltage and said level-shifted reference voltage.