| 摘要 |
PROBLEM TO BE SOLVED: To provide a bias generation device to generate a bias voltage for resetting a CCD solid state imaging device, etc., having a bias circuit capable of widely adjusting the bias voltage. SOLUTION: The bias generation circuit of this invention comprises a first MOS transistor 1 whose drain is connected to a power terminal VDD and source and gate are connected to a bias voltage output node N, a second MOS transistor whose drain and gate are connected to the bias voltage output node N, a MOS circuit 3 connected between the bias voltage output node N and a ground GRD and including one or a plurality of a third MOS transistors 3-1 to 3-4 whose gates are connected to their own sources, fuse elements 4-1 to 4-4 for substantially keeping alive or killing the third MOS transistors 3-1 to 3-4 by being fusion-cut and voltage apply terminals for the fusion cut to apply the voltage to the fuse elements for fusion cutting.
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