Solid-state imaging element and electronic equipment
AssigneeSony Semiconductor Solutions Corporation
InventorRyohei Kawasaki
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a solid-state imaging element and electronic equipment that make it possible to sufficiently secure a time width of a pulse signal. In an AD converter for each unit pixel, a pulse generation circuit feeds back a delay signal obtained by delaying an output signal of the comparator to the comparator and arithmetically operates the output signal and the delay signal to generate a pulse signal. A latch circuit latches the pulse signal generated by the pulse generation circuit. The present disclosure can be applied to a solid-state imaging element of a stacked type and a back side illumination type.
Claims9
A light detecting device, comprising:
- a first substrate that includes four pixels and a first part of a comparison circuit, wherein the first part of the comparison circuit is coupled to the four pixels;
- a second substrate laminated to the first substrate, wherein
- the second substrate includes a second part of the comparison circuit, and
- the second part of the comparison circuit is coupled to the first part of the comparison circuit;
- and
- an AD converter that includes the first part of the comparison circuit and the second part of the comparison circuit, wherein
- the AD converter is shared by the four pixels, and
- the AD converter further includes:
- a pulse generation circuit configured to:
- feed back a delay signal to a comparator circuit, wherein the delay signal represents an output signal of the comparison circuit with a specific delay;
- and
- generate a pulse signal;
- and
- a latch circuit configured to latch a data code based on the generated pulse signal.
Electronic equipment, comprising:
- a light detecting device including:
- a first substrate that includes four pixels and a first part of a comparison circuit, wherein the first part of the comparison circuit is coupled to the four pixels;
- a second substrate laminated to the first substrate, wherein
- the second substrate includes a second part of the comparison circuit, and
- the second part of the comparison circuit is coupled to the first part of the comparison circuit;
- and
- an AD converter that includes the first part of the comparison circuit and the second part of the comparison circuit, wherein
- the AD converter is shared by the four pixels, and
- the AD converter further includes:
- a pulse generation circuit configured to:
- feed back a delay signal to a comparator circuit, wherein the delay signal represents an output signal of the comparison circuit with a specific delay;
- and
- generate a pulse signal;
- and
- a latch circuit configured to latch a data code based on the generated pulse signal;
- a signal processing circuit configured to process the data code;
- and
- an optical system configured to enter incident light into the light detecting device.
Dependencies are inferred from the claim text.