公开(公告)号：US20210020238A1

公开(公告)日：2021-01-21

申请号：US16980211

申请日：2018-03-23

Applicant: NEC Corporation

Inventor： Xu BAI ,  Toshitsugu SAKAMOTO ,  Yukihide TSUJI ,  Makoto MIYAMURA ,  Ryusuke NEBASHI ,  Ayuka TADA

IPC: G11C13/00 ,  H03M5/02 ,  H03K19/1776

Abstract: A reconfigurable circuit includes: a complementary resistive switch including a first resistive switch, a second resistive switch and a selection transistor, wherein a first terminal of the first resistive switch is connected to a first terminal of the second resistive switch and connected to a first terminal of the selection transistor; a first current source having a first terminal connected to a second terminal of the first resistive switch and a second terminal connected to a ground voltage line; a second current source having a first terminal connected to a second terminal of the second resistive switch and a second terminal connected to the ground voltage line; and a resistor having a first terminal connected to a second terminal of the selection transistor and a second terminal connected to a power voltage line.

公开(公告)号：US20200295764A1

公开(公告)日：2020-09-17

申请号：US16083965

申请日：2017-04-06

Applicant: NEC Corporation

Inventor： Xu BAI ,  Toshitsugu SAKAMOTO ,  Yukihide TSUJI ,  Makoto MIYAMURA ,  Ayuka TADA ,  Ryusuke NEBASHI

IPC: H03K19/17736 ,  H03K19/17796 ,  H03K19/17704 ,  H03K19/17784 ,  H03K19/173

Abstract: A reconfigurable circuit includes: a first line; a first switch element disposed between the first line and a first power source line of first voltage; a second line; a second switch element disposed between the second line and a second power source line of second voltage which is different from the first voltage; and a resistive switch assembly disposed between the first line and the second line. The resistive switch assembly includes: a first non-volatile resistive switch; and a second non-volatile resistive switch whose first end is coupled to a first end of the first non-volatile resistive switch. The second end of the first non-volatile resistive switch is coupled to the first line, and the second end of the second non-volatile resistive switch is coupled to the second line.

公开(公告)号：US20190180818A1

公开(公告)日：2019-06-13

申请号：US16324782

申请日：2017-09-11

Applicant: NEC Corporation

Inventor： Makoto MIYAMURA ,  Ryusuke NEBASHI ,  Toshitsugu SAKAMOTO ,  Yukihide TSUJI ,  Xu BAI ,  Ayuka TADA

IPC: G11C13/00

Abstract: In order to provide a highly reliable crossbar circuit that enables salvation of reversal of a resistive state of a variable resistance element, the semiconductor device has a configuration obtained by parallelly arranging two unit elements, each including variable-resistance two-terminal elements connected in series, the semiconductor device being provided with: a unit element group being connected to a first wiring and a second wiring; a first programming driver that changes, via the first wiring, a resistive state of the two-terminal element constituting the unit element group; a first selection transistor being connected to the first wiring and the first programming driver; a second programming driver that changes, via the second wiring, a resistive state of the two-terminal element constituting the unit element group; and a second selection transistor being connected to the second wiring and the second programming driver.

公开(公告)号：US20190052273A1

公开(公告)日：2019-02-14

申请号：US15752330

申请日：2016-08-31

Applicant: NEC Corporation

Inventor： Ayuka TADA ,  Noboru SAKIMURA ,  Makoto MIYAMURA ,  Yukihide TSUJI ,  Ryusuke NEBASHI ,  Xu BAI ,  Toshitsugu SAKAMOTO

IPC: H03K19/177 ,  G06F17/50 ,  H01L27/24 ,  H01L45/00

Abstract: An object of the present invention is to provide a method for effectively performing characterization for circuit verification by static timing analysis, of a programmable logic integrated circuit including a crossbar switch including a resistance-variable element, and a logic circuit logically configured with the crossbar switch, wherein: the programmable logic integrated circuit is divided into a plurality of leaf cells including a plurality of load circuits including a part of the crossbar switch, and a power supply element input to the crossbar switch; the leaf cell is divided into delay paths each including a base leaf cell and a correction leaf cell; and circuit verification is performed based on a delay information library in which a delay time for the base leaf cell and a correction delay for the correction leaf cell are integrated into a delay time for the leaf cell.

公开(公告)号：US20180157779A1

公开(公告)日：2018-06-07

申请号：US15576947

申请日：2016-05-23

Applicant: NEC Corporation

Inventor： Noboru SAKIMURA ,  Yukihide TSUJI ,  Ayuka TADA ,  Xu BAI ,  Makoto MIYAMURA ,  Ryusuke NEBASHI

IPC: G06F17/50 ,  H03K19/003 ,  G11C7/22

Abstract: Provided is a programmable logic integrated circuit wherein even if a failure occurs in any resistance-variable element, remedy would be possible and hence the improvement of reliability has been achieved. In a programmable logic integrated circuit comprising resistance-variable elements, when the states of the resistance-variable elements are to be changed according to externally inputted configuration information, a control means uses a reading means to read the states of the respective resistance-variable elements, and then uses a writing means to change only the states of resistance-changing elements that are different from a state indicated by the configuration information.