Comparator, light detection element, and electronic device
AssigneeSony Semiconductor Solutions Corporation
InventorHirokazu Ejiri
Life of this patent
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Abstract
Light detection with reduced noise is disclosed. In one example, a comparator compares a signal with a reference signal and outputs a comparison result. The comparator includes a differential circuit that outputs a differential voltage between the signal and the reference signal, and an active load circuit electrically connected to the differential circuit, in which the active load circuit includes first and second transistors provided on a surface of a substrate, and the first and second transistors have channel regions extending in a direction substantially perpendicular to the surface of the substrate.
Claims17
A comparator that compares a signal with a reference signal and outputs a comparison result, the comparator comprising:
- a differential circuit that outputs a differential voltage between the signal and the reference signal;
- and
- an active load circuit electrically connected to the differential circuit,
- wherein the active load circuit includes first and second transistors provided on a surface of a substrate, and
- the first and second transistors have channel regions extending in a direction substantially perpendicular to the surface of the substrate.
A light detection element comprising:
- a pixel portion including a photoelectric conversion element that photoelectrically converts incident light into a pixel signal;
- and
- a comparator that compares the pixel signal with a reference signal and outputs a comparison result,
- the comparator including:
- a differential circuit that outputs a differential voltage between the pixel signal and the reference signal;
- and
- an active load circuit electrically connected to the differential circuit,
- wherein the active load circuit includes first and second transistors provided on a surface of a substrate, and
- the first and second transistors have channel regions extending in a direction substantially perpendicular to the surface of the substrate.
Dependencies are inferred from the claim text.