| 摘要 |
PURPOSE:To hold a bootstrapping function by recovering an output level up to a level before the minute noises of input are inputted after the output level drops due to the noises and input noises are extinguished. CONSTITUTION:When the minute noises are inputted to an input terminal IN2, pulses corresponding to the input noises are generated at a node N23, and the potential of a node OUT2 drops. The level of a gate terminal is inhibited by a transistor Q25 connected to the node OUT2 in a node N22, and the potential of the node N22 does not rise when the potential of the node OUT2 does not drop sufficiently. Accordingly, the potential of nodes N25, N26 does not drop. The potential of line voltage or higher rising by capacitive feedback by a capacitor C22 is held by a potential holding circuit formed by transistors Q21, Q22, the capacitor C22 and a pulse generator 11 in the potential of the nodes N25, N26. |
