| 摘要 |
PROBLEM TO BE SOLVED: To provide a constant current driving circuit which can supply a constant current corresponding to an inputted signal without increasing cost. SOLUTION: A resistance 3 is connected to an input terminal 1. Further, a transistor(TR) 4 has its drain and gate connected to the resistance 3. A switching TR 6 has one end connected to the drain and gate of the TR 4. A control terminal 2 inputting an address signal for ON/OFF control over the switching TR 6 is connected to the gate of the switching TR 6. One electrode of a charge holding capacity element 7 is connected to the other end of the switching TR 6. The other electrode of the charge holding capacity element 7 is connected to a ground terminal 11. Further, a TR 5 has its gate connected to the other end of the switching TR 6. A load 8 is connected to the drain of the TR 5. |
