Solid-state imaging device and camera
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorYUSUKE TOKUNAGA
Life of this patent
Estimating the term…
Abstract
A solid-state imaging device includes: a pixel unit that outputs a pixel signal corresponding to an amount of incident light; an A/D converter that performs A/D conversion on the pixel signal; and a D/A conversion circuit that generates a reference signal to be used by the A/D converter. The D/A conversion circuit includes a first buffer circuit that outputs a base voltage VTOP for generating the reference signal, and the first buffer circuit includes a differential pair circuit including a first transistor and a second transistor, and a suppression circuit that suppresses a variation in the base voltage by canceling out a characteristic difference between the first transistor and the second transistor.
Claims14
A solid-state imaging device comprising:
- a pixel unit that outputs a pixel signal corresponding to an amount of incident light;
- an analog-to-digital (A/D) converter that performs A/D conversion on the pixel signal;
- and
- a digital-to-analog (D/A) conversion circuit that generates a reference signal to be used by the A/D converter, wherein
- the D/A conversion circuit includes a first buffer circuit that outputs a base voltage for generating the reference signal, and
- the first buffer circuit includes
- a differential pair circuit including a first transistor and a second transistor, and
- a suppression circuit that suppresses a variation in the base voltage by canceling out a characteristic difference between the first transistor and the second transistor.
Dependencies are inferred from the claim text.