Patent ID: 7652309

Claim:
A charge-coupled device (CCD) solid state imaging module, comprising: a CCD area sensor; a substrate bias voltage setting device formed on said CCD area sensor for outputting a voltage; and a substrate bias voltage outputting device fanned on a chip other than said CCD area sensor for outputting a substrate bias voltage of said CCD area sensor by selecting a voltage level from among a plurality of voltages based on the voltage output by said substrate bias voltage setting device, wherein said substrate bias voltage outputting device comprises: a bias modulation circuit for generating a modulation voltage, said circuit being connected to said voltage output by said substrate bias voltage setting device, and wherein said bias modulation circuit comprises: an operational amplifier having a non-inverted input terminal connected to an output voltage from said substrate bias voltage setting device; a feedback resistor formed between an inverted input terminal of said amplifier and an output terminal of said amplifier; and a switch having a terminal connected to said inverted input terminal and another terminal connected to a variable current source.