Photoelectric conversion device, electronic device, and substrate

1. A photoelectric conversion device comprising:

a pixel portion in which a plurality of pixels, each including a photoelectric conversion element, are arranged in a matrix;

a sample-and-hold unit configured to sample a signal generated in the photoelectric conversion element via a vertical signal line from the pixel portion and hold the signal; and

a conversion unit configured to perform an analog-to-digital conversion on a signal outputted from the sample-and-hold unit,

wherein in the sample-and-hold unit, a first sample-and-hold circuit that samples a signal for when the photoelectric conversion element is reset and a second sample-and-hold circuit that samples a signal for when a photoelectric conversion operation is performed in the photoelectric conversion element are connected to one vertical signal line,

wherein the pixel portion is arranged on a first substrate,

wherein a part of a group, the group being configured by the sample-and-hold unit and the conversion unit, and a first current source configured to provide a current to the sample and hold unit, are arranged on a second substrate,

wherein another part of the group and a second current source configured to provide a current to the conversion unit are arranged on a third substrate,

wherein in the sample-and-hold unit, a third sample-and-hold circuit is connected to a vertical signal line different from the one vertical signal line, and

wherein a distance between a capacitive element included in the first sample-and-hold circuit and a capacitive element included in the second sample-and-hold circuit is shorter than a distance between the capacitive element included in the first sample-and-hold circuit and a capacitive element included in the third sample-and-hold circuit.

2. The photoelectric conversion device according to claim 1 , wherein a third current source configured to provide a current to the sample-and-hold unit is arranged on the second substrate.

3. The photoelectric conversion device according to claim 2 , wherein a fourth current source configured to provide a current to the conversion unit is arranged on the second substrate.

4. The photoelectric conversion device according to claim 2 , wherein a fourth current source configured to provide a current to the conversion unit is arranged on the third substrate.

5. The photoelectric conversion device according to claim 1 , wherein a third current source configured to provide a current to the sample-and-hold unit and a fourth current source configured to provide a current to the conversion unit are arranged on the third substrate.

6. The photoelectric conversion device according to claim 1 , wherein the sample-and-hold unit is arranged on the second substrate.

7. The photoelectric conversion device according to claim 6 , wherein a signal outputted from the first sample-and-hold circuit and the second sample-and-hold circuit is transferred to the conversion unit via the same via connecting the second substrate on which the sample-and-hold unit is arranged and the third substrate on which the sample-and-hold unit is not arranged and the conversion unit is arranged.

8. The photoelectric conversion device according to claim 6 , wherein a portion of the conversion unit is arranged on the second substrate on which the sample-and-hold unit is arranged.

9. The photoelectric conversion device according to claim 8 , wherein in the conversion unit, an analog-to-digital conversion circuit is connected to the one vertical signal line, and

wherein a portion of the analog-to-digital conversion circuit is arranged on the second substrate on which the sample-and-hold unit is arranged.

10. The photoelectric conversion device according to claim 1 , wherein the sample-and-hold unit is arranged on the second substrate, and

wherein the conversion unit is arranged on the third substrate.

11. The photoelectric conversion device according to claim 1 , wherein the conversion unit is arranged on the third substrate.

12. The photoelectric conversion device according to claim 11 , wherein a portion of the sample-and-hold unit is arranged on the third substrate on which the conversion unit is arranged.

13. The photoelectric conversion device according to claim 12 , wherein either the first sample-and-hold circuit or the second sample-and-hold circuit is arranged on the second substrate and the other is arranged on the third substrate.

14. The photoelectric conversion device according to claim 1 , wherein the conversion unit includes a 42 analog-to-digital conversion circuit.

15. The photoelectric conversion device according to claim 1 , wherein the conversion unit includes a slope analog-to-digital conversion circuit.

16. The photoelectric conversion device according to claim 1 , wherein substrates on which the group is arranged are arranged in a stack.

17. The photoelectric conversion device according to claim 1 , wherein the second substrate is stacked between the first substrate and the third substrate.

18. The photoelectric conversion device according to claim 1 , wherein the conversion unit is a ΔΣ analog-to-digital conversion unit.

19. An electronic device comprising:

the photoelectric conversion device according to claim 1 ; and

a control device configured to control an operation of the photoelectric conversion device.