| 摘要 |
PROBLEM TO BE SOLVED: To provide a display drive circuit which less degrades image quality, even if steady-state current is reduced. SOLUTION: When a control signal TP given with a timing when an input signal IN changes goes to "H", TGs 9 and 12 and an NMOS 11N are turned on, and NMOSs 13N and 14N are turned on, whereby a differential amplifier part and an output part are disconnected from each other and a capacitor 8 is discharged. When the control signal TP goes to "L" with a timing when the input signal IN is stabilized, a potential of a pad 10 is applied to a gate of an NMOS 6N by coupling by the capacitor 8, whereby the NMOS 6N quickly becomes a very low on-resistance, independently of the steady current of the differential amplifier part at the moment that output of an output signal OUT is started after the control signal TP goes to "L", and a charge of a load circuit LD connected to the pad 10 is charged/discharged. Consequently, the output signal OUT quickly approximates the potential of the input signal. COPYRIGHT: (C)2007,JPO&INPIT
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