公开(公告)号：US20170346401A1

公开(公告)日：2017-11-30

申请号：US15677913

申请日：2017-08-15

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Keisuke KURODA ,  Takashi RYU

IPC: H02M3/158 ,  H02M1/08

CPC classification number: H02M3/1582 ,  H02M1/08 ,  H02M3/158 ,  H02M3/1588 ,  H02M2001/0003 ,  Y02B70/1466

Abstract: A controller controls a bi-directional converter which includes: a first input/output terminal and a second input/output terminal for receiving and outputting a voltage stepped up by a step-up operation and a voltage stepped down by a step-down operation; a first switching element; a second switching element; and an inductor. The controller includes: a first driver which controls the first switching element via a first resistance circuit; a second driver which controls the second switching element via a second resistance circuit; and an operation mode setter which selects one of the step-up operation and the step-down operation, wherein at least one of the first resistance circuit and the second resistance circuit is a variable resistance circuit which has a resistance value that varies for the step-up operation and the step-down operation, in accordance with selection made by the operation mode setter.

公开(公告)号：US20220155334A1

公开(公告)日：2022-05-19

申请号：US17442272

申请日：2020-01-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Keisuke KURODA ,  Takuya KAJIWARA ,  Junji NAKATSUKA ,  Masaaki NAGAI

IPC: G01P15/125 ,  G01P15/18

Abstract: A signal processing device includes a detection circuit, a correction circuit, and a comparator circuit. The detection circuit generates a first detection signal, based on an output signal of a capacitive detection element that detects inertial force. The correction circuit corrects non-linearity of the first detection signal and outputs a second detection signal thus corrected. The comparator circuit compares the first detection signal and the second detection signal with each other and outputs a comparison signal representing a result of comparison.

公开(公告)号：US20180203035A1

公开(公告)日：2018-07-19

申请号：US15921296

申请日：2018-03-14

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Keisuke KURODA ,  Takeshi MORI

IPC: G01P21/00 ,  G01C25/00 ,  H03L7/06

Abstract: A sensor is provided including: an element outputting detection signals according to magnitude of physical quantity; a drive circuit outputting a driving signal to the element and receiving a monitor signal from the element; a detection circuit that includes amplifiers amplifying the detection signals and a first synchronous demodulation circuit performing synchronous demodulation on a signal from the amplifier, receives the detection signals, and outputs a physical quantity signal according to the physical quantity; a processing circuit processing a signal from the first synchronous demodulation circuit; a first diagnostic circuit that receives a signal into the processing circuit and a signal from the processing circuit, and outputs a first error signal when abnormalities occur in the processing circuit; and a second diagnostic circuit that outputs a diagnostic signal to the first diagnostic circuit, instead of the signal into the processing circuit or instead of the signal from the processing circuit.

公开(公告)号：US20220155337A1

公开(公告)日：2022-05-19

申请号：US17442300

申请日：2020-01-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Keisuke KURODA ,  Takuya KAJIWARA ,  Junji NAKATSUKA ,  Masaaki NAGAI

IPC: G01P21/00 ,  G01P15/125 ,  G01P15/18

Abstract: A signal processing device includes detection circuitry and correction circuitry. The detection circuitry includes a first detection unit and a second detection unit. The first detection unit generates at least one detection signal based on an associated one of output signals corresponding to each of at least two directions. The second detection unit has a broader detection range than the first detection unit and generates at least one correction signal based on the associated one of the output signals corresponding to each of the at least two directions. The correction circuitry corrects an associated one of the detection signals corresponding to each of the at least two directions with at least an associated one of the correction signals corresponding to at least one direction, other than one direction subjected to correction, out of the at least two directions.

公开(公告)号：US20190120655A1

公开(公告)日：2019-04-25

申请号：US16163184

申请日：2018-10-17

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Keisuke KURODA ,  Takeshi MORI

IPC: G01C25/00

Abstract: A sensor includes a detection element that outputs a detection signal corresponding to a physical quantity, a detection circuit that outputs a physical quantity signal corresponding to the physical quantity, first to third diagnosis circuits. The first diagnosis circuit is configured to receive a signal input to the detection circuit and a signal output from the detection circuit, to output an error signal in a case where the detection circuit is abnormal. The second diagnosis circuit is configured to input a diagnosis signal to the first diagnosis circuit. The second diagnosis circuit is configured to input, to the first diagnosis circuit, another of the signal input to the detection circuit and the signal output from the detection circuit. The third diagnosis circuit monitors whether or not the diagnosis signal is input from the second diagnosis circuit to the first diagnosis circuit.