Patent ID: 7385425

Claim:
A printed circuit unit, comprising: a signal input circuit, comprising N serially connected organic transistors, each of the organic transistors having a first source/drain, a second source/drain and a gate, wherein each of the second sources/drains of the 1 st to the N−1 th organic transistors is respectively connected to the first source/drain of an immediately adjacent serially connected organic transistor, and the gates of the organic transistors are connected together to receive an input signal, and the first source/drain of the 1 st organic transistor is connected to a first voltage, and wherein N is an integer greater than 1; a load circuit, connected to the second source/drain of the N th organic transistor for providing a load; and a level shifter circuit, connected to the signal input circuit, for adjusting an output voltage of the second source/drain of the N th organic transistor to shift to a predetermined level.