Image signal processing device and solid-state imaging device

A solid-state imaging device comprising:

• a CMOS sensor that outputs an image signal;
• and
• an image signal processing unit that processes the image signal read out from the CMOS sensor, wherein
• the CMOS sensor includes
• an effective pixel unit in which effective pixels are arrayed,
• an OB pixel unit in which OB pixels are arrayed,
• a column ADC circuit that digitalizes a signal component read out from the effective pixels based on a comparison result with a reference voltage, and
• a reference voltage generating unit that generates the reference voltage, and
• the image signal processing unit includes
• a feedback clamp circuit that increases or decreases a clamp parameter that sets a black level so that the black level approaches a target value while controlling a change amount of the clamp parameter based on the black level read out from the OB pixels, and
• an OB clamp circuit that clamps an image signal read out from the effective pixels and calculates a clamp parameter correction coefficient that controls the change amount of the clamp parameter based on the black level read out from the OB pixels.