OUTPUT POTENTIAL HOLDING CIRCUIT AND INK JET PRINTER HEAD DRIVER CIRCUIT USING THIS HOLDING CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide an output potential holding circuit which reduces the circuit size, and performs stable potential holding.;SOLUTION: In this output potential holding circuit, a first switching transmission gate 2 which performs on/off operation the same as that of an output driver 1 is connected to the output signal line 6 of the output driver 1, high voltage outputting is performed via this gate 2, and a second switching transmission gate 4 which performs on/off operation reverse to that of the output driver 1 is connected to the signal line of the gate 2. The output signal line 6 of the output driver 1 is connected to the gate of an NMOS transistor 3, the signal line of the gate 4 is connected to the NMOS transistor 3, and the output voltage of the output signal line produced when the output driver 1 is in an off state is held at a voltage predetermined by the gate 4 and the NMOS transistor 3.;COPYRIGHT: (C)2004,JPO&NCIPI