D/A conversion circuit and semiconductor device

Details D/A conversion circuit and semiconductor device D/A conversion circuit and semiconductor device

2007-02-22

2009-06-23

Dang, Phuc T (Department: 2892)

Active solid-state devices (e.g., transistors, solid-state diode

Gate arrays

With particular signal path connections

C257S208000, C257S211000, C257S202000, C257S203000, C257S206000, C438S142000, C438S309000, C438S478000

Reexamination Certificate

active

07550790

ABSTRACT:
A D/A conversion circuit with a small area is provided. In the D/A conversion circuit, according to a digital signal transmitted from address lines of an address decoder, one of four gradation voltage lines is selected. A circuit including two N-channel TFTs is connected in series to a circuit including two P-channel TFT, and a circuit including the circuits connected in series to each other is connected in parallel to each of the gradation voltage lines. Further, an arrangement of the circuit including the two N-channel TFTs and the circuit including the two P-channel TFTs is reversed for every gradation voltage line. By this, the crossings of wiring lines in the D/A conversion circuit becomes small and the area can be made small.

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