公开(公告)号：US20190280707A1

公开(公告)日：2019-09-12

申请号：US16415067

申请日：2019-05-17

Applicant: OLYMPUS CORPORATION

Inventor： Shuzo HIRAIDE ,  Yasunari HARADA ,  Masato OSAWA

IPC: H03M1/38 ,  A61B1/045 ,  H03M1/10 ,  H04N5/378

Abstract: A disclosed analog-to-digital converter includes; a sampling circuit to sample a pair of analog signals as a differential input signal; a binary capacitance holding the sampled pair of analog signals and reflecting a level of a reference signal to the analog signals through the binary capacitance to generate a pair of voltage signals; a comparator including a transistor to which the voltage signals are input, to compare one of the voltage signals with the other; a correction circuit provided previously to the comparator, to output to the comparator the pair of voltage signals in which voltage dependency of stray capacitance in the input transistor is cancelled; and a controller that successively determines a value of each bit of a digital signal corresponding to the binary capacitance based on a comparison by the comparison circuit, and reflects the value of each bit of the digital signal to the reference signal.

公开(公告)号：US20190373197A1

公开(公告)日：2019-12-05

申请号：US16442666

申请日：2019-06-17

Applicant: OLYMPUS CORPORATION

Inventor： Yasunari HARADA ,  Shuzo HIRAIDE ,  Masato OSAWA ,  Satoru ADACHI

IPC: H04N5/378 ,  H04N5/365 ,  A61B1/00 ,  A61B1/045

Abstract: An imaging element includes: a plurality of pixels where each pixel is configured to generate an imaging signal; a noise eliminating circuit configured to eliminate a noise component included in the imaging signal; a plurality of column source follower buffers where each column source follower buffer is configured to amplify the imaging signal from which the noise component has been eliminated by the noise eliminating circuit, and output the amplified signal; a horizontal scanning circuit configured to sequentially select the column source follower buffer and output the imaging signal; and a buffer circuit which is connected with the column source follower buffer sequentially selected by the horizontal scanning circuit to form a voltage follower circuit, the buffer circuit being configured to perform impedance conversion on a voltage of the imaging signal output from the column source follower buffer, and output the converted signal to an outside.