| 摘要 |
PROBLEM TO BE SOLVED: To reduce the switching elements of the output stage of the scanning circuit or transfer driving circuit of a solid-state image pickup device and to reduce the scale of a logic circuit by constituting a circuit for outputting three or more voltage levels by the same number of the switching elements as the number of the levels. SOLUTION: In the output stage of a vertical circuit, the respective source electrodes of the switching elements NMOS1, NMOS2 and PMOS1 are respectively connected to power supply voltages VL, VM and VH, respective gate electrodes are connected to vertical scanning pulsesϕLN,ϕMN andϕHN and respective drain electrodes are connected to a common output terminal (t). The NMOS1 is turned to a conductive state in the case that the VL of a low level are outputted to scanning pulsesϕVm , the NMOS2 is turned to the conductive state in the case that an intermediate level VM is outputted and the PMOS1 is turned to the conductive state in the case that a high level VH is outputted. Thus, three is made sufficient for the number of output switching elements in the case that the output of the vertical scanning circuit is three values, the three kinds of pulse voltages are sufficient as well and the scale of the output stage and a pulse generation circuit is reduced.
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