| CPC H04N 25/772 (2023.01) [H01L 27/14603 (2013.01); H01L 27/14612 (2013.01); H01L 27/14643 (2013.01); H04N 25/79 (2023.01)] | 14 Claims |
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1. A light detecting device, comprising:
a first pixel unit that includes:
a first photodiode;
a first transfer transistor coupled to the first photodiode;
a first amplification transistor having a gate terminal coupled to the first transfer transistor; and
a first selection transistor coupled to the first amplification transistor;
a second pixel unit that includes:
a second photodiode;
a second transfer transistor coupled to the second photodiode;
a second amplification transistor having a gate terminal coupled to the second transfer transistor; and
a second selection transistor coupled to the second amplification transistor; and
an analog to digital (AD) converter that includes a first metal oxide semiconductor (MOS) transistor to which a reference signal is input, wherein
the first pixel unit and the second pixel unit share the AD converter,
each of the first transfer transistor and the second transfer transistor is configured to enter into an ON state at a first timing,
the first selection transistor is configured to enter into an ON state at a second timing,
the second selection transistor is configured to enter into the ON state at a third timing, and
the AD converter further includes:
a second MOS transistor;
a third MOS transistor; and
a fourth MOS transistor, wherein
a gate terminal of the third MOS transistor and a gate terminal of the fourth MOS transistor are connected to each of a drain of the third MOS transistor and a drain of the first MOS transistor,
a source of the first MOS transistor is connected to a drain of the second MOS transistor, and
the first pixel unit and the second pixel unit are connected in parallel between the drain of the second MOS transistor and a drain of the fourth MOS transistor.
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