公开(公告)号：US20230145662A1

公开(公告)日：2023-05-11

申请号：US17965308

申请日：2022-10-13

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Koichi TAKEDA ,  Takahiro SHIMOI ,  Masaya NAKANO ,  Hidenori MITANI ,  Yoshinobu KANEDA

IPC: H03F3/45

CPC classification number: H03F3/45744 ,  H03F3/45497 ,  H03F3/45511

Abstract: Speed enhancement of data reading is achieved while suppressing an influence of an offset voltage of a differential amplifier. The differential amplifier includes: a current source that is connected to a first power supply in which a suppliable current is a first current; an active element pair that is connected to the current source, and amplifies a signal input to an input terminal pair to output an output signal pair; a load element pair that is connected to a second power supply different in power supply voltage from the first power supply, the load element pair serving for outputting the output signal pair to an output terminal pair; and a capacitance element pair that is inserted between an external input terminal pair and the input terminal pair; a switching element pair that charges the capacitance element pair to generate a voltage, which is obtained by converting an offset voltage of the input terminal pair into an input voltage, in the capacitance element pair by short-circuiting corresponding terminals between the output terminal pair and the input terminal pair; and a current control circuit that controls a current suppliable by the current source to a second current larger than the first current at a time of performing the charge.

公开(公告)号：US20230402080A1

公开(公告)日：2023-12-14

申请号：US18317382

申请日：2023-05-15

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Koichi TAKEDA ,  Akihiko KANDA ,  Takahiro SHIMOI

IPC: G11C11/16 ,  G11C7/08

CPC classification number: G11C11/1673 ,  G11C11/1675 ,  G11C7/08

Abstract: A clamp element 46 applies a fixed potential to a bit line BL at a time of a readout operation. A reference current source RCS generates a reference current Iref. An offset current source OCS1 is activated at a time of a readout operation for an OTP cell OTPC, and at a time of being activated, generates an offset current Iof1 to be subtracted from a cell current Icel. At the time of the readout operation for the OTP cell OTPC, the sense amplifier SA detects a magnitude relationship between the reference current Iref and a readout current Ird obtained by subtracting the offset current Iof1 from the cell current Icel.

公开(公告)号：US20230025357A1

公开(公告)日：2023-01-26

申请号：US17847967

申请日：2022-06-23

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Genta WATANABE ,  Ken MATSUBARA ,  Tomoya SAITO ,  Akihiko KANDA ,  Koichi TAKEDA ,  Takahiro SHIMOI

IPC: G11C11/16

Abstract: A semiconductor device capable of changing a data programming process in a simple manner according to a situation is provided. The semiconductor device includes a plurality of memory cells, a programming circuit for supplying a programming current to the memory cell, and a power supply circuit for supplying power to the programming circuit. The power supply circuit includes a charge pump circuit for boosting the external power supply, a voltage of the external power supply according to the selection indication, and a selectable circuit capable of switching the boosted voltage boosted by the charge pump circuit. The control circuit further includes a control circuit for executing data programming processing by the programming circuit by switching the selection indication.