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公开(公告)号：US20230247316A1
公开(公告)日：2023-08-03
申请号：US18003417
申请日：2021-06-28
发明人： TERUKAZU TANAKA , ATSUMI NIWA
IPC分类号： H04N25/57 , H03G3/30 , H04N25/778 , H04N25/51
CPC分类号： H04N25/57 , H03G3/30 , H04N25/778 , H04N25/51 , H03G2201/103
摘要： A solid-state imaging device according to an embodiment includes: pixel circuits, each of the pixel circuits including: a generation unit (31) generating a voltage corresponding to a logarithmic value of a photocurrent; a capacitor (C1) having a first electrode to which the voltage generated by the generation unit is applied; a first amplifier (40a) having a first input terminal, which is connected to a second electrode of the capacitor, and a second input terminal, to which a first reference voltage (VbA0) is applied to, to output a comparison result obtained by comparing the voltage applied to the first input terminal with the voltage applied to the second input terminal; a switch unit (43) controlling a connection between the output of the first amplifier and the first input terminal; and a second amplifier (40b) having a third input terminal, to which the output of the first amplifier is connected, and a fourth input terminal, to which a second reference voltage (VbA1) is applied, to output a comparison result obtained by comparing the voltage applied to the third input terminal with the voltage applied to the fourth input terminal, in which a first gain of the first amplifier is lower than a second gain of the second amplifier.
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公开(公告)号：US20190208152A1
公开(公告)日：2019-07-04
申请号：US16323674
申请日：2017-08-17
发明人： TERUKAZU TANAKA , MASAKI SAKAKIBARA
IPC分类号： H04N5/3745 , H04N5/378
摘要： The present technology relates to an image sensor capable of suppressing the power consumption, and an electronic device. A reference signal output unit configured to output a reference signal of which a level is changed, includes a plurality of DACs including a plurality of current sources, and a plurality of switches controlling a current flowing from the current source, and a load resistance for outputting the reference signal. Further, the reference signal output unit is connected to three or more power sources, and in combinations of two power sources in the three or more power sources, each of two or more types of combinations of the power sources includes a first path through which the current controlled by the switch, flows, and a second path through which a current in the same direction, flows to the load resistance. The present technology, for example, can be applied to an image sensor or the like, performing reference signal comparison type AD conversion.
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