The invention provides a differential current output unit that has a least number of capacitors and a minimized chip area on one hand, and on the other hand that is capable of providing a smoothly varying output current across a zero-crossing point in accord with an inputted difference input voltage. This label has good workability in printing, cutting and blanking even in a low-humidity environment. The preferred embodiment comprises 93. The first gate is connected to the second gate to become a second signal node receiving a second signal as an input signal.