公开(公告)号：US20210294476A1

公开(公告)日：2021-09-23

申请号：US17331218

申请日：2021-05-26

Applicant: Alps Alpine Co., Ltd.

Inventor： Kiyoshi SASAI ,  Kazufumi NAGANUMA

IPC: G06F3/041 ,  G06F3/044

Abstract: An electrostatic capacitance sensor includes: at least one detection electrode; drive electrodes, capacitors being respectively formed between the drive electrodes and the at least one detection electrode; a driver capable of causing voltages of the drive electrodes to change independently from each other; a reference voltage generator that generates a reference voltage; a detection signal generator that transfers charge so that a voltage of the at least one detection electrode approaches the reference voltage and that generates a detection signal according to the transfer of the charge; and a controller that controls the driver. The driver is capable of applying the reference voltage to each of the drive electrodes. When the driver causes a voltage of one or more of the drive electrodes to change, the controller controls the driver so as to apply the reference voltage to the remaining drive electrodes.

公开(公告)号：US20250164583A1

公开(公告)日：2025-05-22

申请号：US19024160

申请日：2025-01-16

Applicant: Alps Alpine Co., Ltd.

Inventor： Eiji UMETSU ,  Kanta KIKUCHI ,  Tomoyuki SAWATAISHI ,  Kazufumi NAGANUMA

IPC: G01R33/00 ,  G01R33/09 ,  H10N50/10

Abstract: A magnetic sensor includes a magnetic detection unit including a magnetoresistance effect element having a pinned magnetic layer, a free magnetic layer, and an intermediate layer formed between the pinned magnetic layer and the free magnetic layer, a magnetic field calculation unit configured to calculate a measurement magnetic field based on an output of the magnetic detection unit, and a saturation magnetic field application unit configured to apply a magnetic field to the free magnetic layer in a direction of the measurement magnetic field to magnetically saturate the free magnetic layer. The magnetic field calculation unit calculates the measurement magnetic field based on a first output of the magnetic detection unit when the measurement magnetic field is applied to the free magnetic layer, and a second output of the magnetic detection unit when the free magnetic layer is magnetically saturated.