COMMUNICATION TERMINAL AND COMMUNICATION SYSTEM

To provide a communication terminal and a communication system that can prevent voltage signal attenuation and are less susceptible to reflected waves in communication systems each having a plurality of communication terminals.SOLUTION: A communication terminal 100 transmits, via a signal line 60, a voltage signal in which a voltage is superimposed on a predetermined first reference voltage. The communication terminal 100 includes an impedance adjustment circuit 120 that switches an output impedance of the communication terminal 100 during a period T0 during which data is transmitted by the voltage signal in which the voltage is superimposed on the predetermined first reference voltage.SELECTED DRAWING: Figure 2 【課題】複数の通信端末を有する通信システムにおいて、電圧信号の減衰を防止でき、且つ反射波の影響を受けにくい通信端末、および通信システムを提供する。【解決手段】通信端末１００は、所定の第１の基準電圧に電圧が重畳された電圧信号を信号線６０を介して送信する。通信端末１００は、所定の第１の基準電圧に電圧が重畳された電圧信号によりデータを送信する期間Ｔ０の間、通信端末１００の出力インピーダンスを切替えるインピーダンス調整回路１２０を有する。【選択図】図２