Patent ID: 9282269
Filing Date: 2016-03-08
CPC Classification: H03M,H04N

Claim Text:
1. An A/D conversion device comprising: a reading unit that is configured to include analog digital (A/D) conversion that compares a level of an input analog signal with reference signals that respectively have different slopes and that is configured to make an output signal into digital data on the basis of a period when the input analog signal and a respective one of the reference signals attain a predetermined relationship, wherein the reading unit includes: a comparator configured to compare the input analog signal with the reference signals to provide comparator output; counter latch circuitry configured for AD conversion based on the comparator output to provide the digital data; and bit shift circuitry configured to bit-shift the digital data, and wherein when digital Correlated Double Sampling (CDS) is performed with a first signal and a second signal having different bit precisions obtained from the comparison with the reference signals respectively having different slopes, the bit shift circuitry bit-shifts the first signal or the second signal.