In this article, we first point out a missing active-device while providing its theoretical definition and impact on electronics. This type of active devices has an inverse functionality of transistors, and is suggested to be called trancitor rather than transistor because it directly transfers an input signal into a voltage output. It is expected that a trancitor coupled with a transistor can provide a minimal circuit configuration, i.e., low circuit complexity, helping virtually to meet the Moore's law. And this may also lead to a lower power-consumption and higher speed of circuits compared to a transistor-only circuit. These are supported with a circuit simulation and simple Tetris-like block analysis. In this regards, in the future, it should be required to find a trancitor to be another foundation of electronics along with transistors.