Signal transmission circuit, solid-state imaging device, camera and liquid crystal display

摘要

A signal transmission circuit that can be operated stably even when a power supply of the circuit has a reduced voltage is provided as a shift register. A positive-side terminal (a node N11) of a bootstrap capacitor (C1) is connected to a gate of a charge transistor (T21) in a unit circuit of a subsequent stage. Consequently, the gate of the charge transistor in the unit circuit of the subsequent stage always is supplied with a high voltage of the positive-side terminal of the bootstrap capacitor in the unit circuit of its preceding stage, and therefore, a bootstrap capacitor (C2) in the unit circuit of the subsequent stage can be charged reliably up to a power supply voltage VDD even when the power supply voltage VDD is lowered.