Patent Number: 6,310,369

Title: Charge-to-voltage converter with adjustable conversion factor

Abstract: In a floating diffusion output type or a floating gate output type charge-to-voltage converter, the floating diffusion or the floating gate is coupled to one or more diffusion regions by means of one or more switch elements, and such elements are selectively turned on or off in such a manner that the the charge-to-voltage conversion factor is raised to obtain a great voltage amplitude when a small quantity of signal charge is input, or the conversion factor is lowered to obtain a small voltage amplitude when a large quantity of signal charge is input.

Inventors: Narabu; Tadakuni (Kanagawa, JP), Sato; Maki (Kanagawa, JP), Maki; Yasuhito (Kanagawa, JP)

Assignee: Sony Corporation

International Classification: H01L 29/66 (20060101); G11C 19/28 (20060101); G11C 19/00 (20060101); H01L 29/768 (20060101); H01L 024/148 (); H01L 029/768 ()

Expiration Date: 10/30/2018