Keiji Tanaka

Person

Yokohama, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Reception circuit for optical communication
- Patent number 12,316,281
- Issue date May 27, 2025
- Sumitomo Electric Industries, Ltd.
- Yoshiyuki Sugimoto
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Optical module assembly, optical module, package for optical module...
- Patent number 12,309,917
- Issue date May 20, 2025
- Sumitomo Electric Industries, Ltd.
- Taichi Misawa
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Output circuit with peak voltage detection
- Patent number 12,298,332
- Issue date May 13, 2025
- Sumitomo Electric Industries, Ltd.
- Hiroshi Uemura
- G01 - MEASURING TESTING
Information Patent Grant
Optical module assembly, optical module, package for optical module...
- Patent number 12,273,991
- Issue date Apr 8, 2025
- Sumitomo Electric Industries, Ltd.
- Taichi Misawa
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Optical module and manufacturing method of optical module for optic...
- Patent number 12,210,231
- Issue date Jan 28, 2025
- Sumitomo Electric Industries, Ltd.
- Keiji Tanaka
- G02 - OPTICS
Information Patent Grant
Variable gain amplifier circuit and semiconductor integrated circuit
- Patent number 12,119,792
- Issue date Oct 15, 2024
- Sumitomo Electric Industries, Ltd.
- Hiroshi Uemura
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Receiver circuit for optical communication
- Patent number 12,068,788
- Issue date Aug 20, 2024
- Sumitomo Electric Industries, Ltd.
- Seiji Kumagai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electrostatic protection circuit and semiconductor integrated circuit
- Patent number 11,990,747
- Issue date May 21, 2024
- Sumitomo Electric Industries, Ltd.
- Hiroshi Uemura
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Driving circuit and semiconductor integrated circuit for use in an...
- Patent number 11,869,399
- Issue date Jan 9, 2024
- Sumitomo Electric Industries, Ltd.
- Hiroshi Uemura
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Electrostatic protection circuit and semiconductor integrated circuit
- Patent number 11,799,288
- Issue date Oct 24, 2023
- Sumitomo Electric Industries, Ltd.
- Hiroshi Uemura
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Printed board and printed board assembly
- Patent number 11,744,008
- Issue date Aug 29, 2023
- Sumitomo Electric Industries, Ltd.
- Taichi Misawa
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Transimpedance amplifier for receiving burst optical signal
- Patent number 11,601,203
- Issue date Mar 7, 2023
- Sumitomo Electric Industries, Ltd.
- Keiji Tanaka
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Optical receiver and transimpedance amplifier circuit
- Patent number 11,595,010
- Issue date Feb 28, 2023
- Sumitomo Electric Industries, Ltd.
- Naoki Itabashi
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Amplitude modulation circuit and semiconductor integrated circuit f...
- Patent number 11,588,476
- Issue date Feb 21, 2023
- Sumitomo Electric Industries, Ltd.
- Hiroshi Uemura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Receiving circuit and optical receiving circuit
- Patent number 11,486,760
- Issue date Nov 1, 2022
- Sumitomo Electric Industries, Ltd.
- Seiji Kumagai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Differential amplifier circuit having variable gain
- Patent number 11,437,962
- Issue date Sep 6, 2022
- Sumitomo Electric Industries, Ltd.
- Naoki Itabashi
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Transimpedance amplifier circuit
- Patent number 11,411,542
- Issue date Aug 9, 2022
- Sumitomo Electric Industries, Ltd.
- Keiji Tanaka
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Optical semiconductor device, optical transmission module, and opti...
- Patent number 11,398,866
- Issue date Jul 26, 2022
- Sumitomo Electric Industries, Ltd.
- Taichi Misawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transimpedance amplifier circuit
- Patent number 11,394,352
- Issue date Jul 19, 2022
- Sumitomo Electric Industries, Ltd.
- Yoshiyuki Sugimoto
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Transimpedance amplifier circuit
- Patent number 11,362,629
- Issue date Jun 14, 2022
- Sumitomo Electric Industries, Ltd.
- Naoki Itabashi
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Transimpedance amplifier circuit
- Patent number 11,349,444
- Issue date May 31, 2022
- Sumitomo Electric Industries, Ltd.
- Keiji Tanaka
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Differential amplifier circuit having stable gain
- Patent number 11,228,293
- Issue date Jan 18, 2022
- Sumitomo Electric Industries, Ltd.
- Yoshiyuki Sugimoto
- G05 - CONTROLLING REGULATING
Information Patent Grant
Mover control system, mover system, mover control method, and non-t...
- Patent number 11,199,840
- Issue date Dec 14, 2021
- PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
- Hideo Morita
- G01 - MEASURING TESTING
Information Patent Grant
Transimpedance amplifier for receiving burst optical signal
- Patent number 10,819,425
- Issue date Oct 27, 2020
- Sumitomo Electric Industries, Ltd.
- Keiji Tanaka
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Driver circuit
- Patent number 10,666,013
- Issue date May 26, 2020
- Sumitomo Electric Industries, Ltd.
- Keiji Tanaka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical modulator
- Patent number 10,656,444
- Issue date May 19, 2020
- Sumitomo Electric Industries, Ltd.
- Keiji Tanaka
- G02 - OPTICS
Information Patent Grant
Laser driver circuit and optical transmitter using the same
- Patent number 10,574,027
- Issue date Feb 25, 2020
- Sumitomo Electric Industries, Ltd.
- Naoki Itabashi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Variable gain amplifier and driver implementing the same
- Patent number 9,973,165
- Issue date May 15, 2018
- Sumitomo Electric Industries, Ltd.
- Keiji Tanaka
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Amplifier
- Patent number 9,825,602
- Issue date Nov 21, 2017
- Sumitomo Electric Industries, Ltd.
- Naoki Itabashi
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Driver for pulse amplitude modulation and optical transmitter imple...
- Patent number 9,705,601
- Issue date Jul 11, 2017
- Sumitomo Electric Industries, Ltd.
- Keiji Tanaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL MODULE AND FLEXIBLE PRINTED CIRCUIT BOARD
- Publication number 20250113429
- Publication date Apr 3, 2025
- Sumitomo Electric Industries, Ltd.
- Seiji KUMAGAI
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
BRIDGE CHIP AND SEMICONDUCTOR INTEGRATED MODULE
- Publication number 20250105157
- Publication date Mar 27, 2025
- Sumitomo Electric Industries, Ltd.
- Hiroshi UEMURA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
PEAKING ADJUSTMENT CIRCUIT
- Publication number 20250023523
- Publication date Jan 16, 2025
- Sumitomo Electric Industries, Ltd.
- Hiroshi UEMURA
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
OPTICAL MODULATOR
- Publication number 20240353730
- Publication date Oct 24, 2024
- Sumitomo Electric Industries, Ltd.
- Taichi MISAWA
- G02 - OPTICS
Information Patent Application
OPTICAL MODULE
- Publication number 20240329319
- Publication date Oct 3, 2024
- Sumitomo Electric Industries, Ltd.
- Hiroshi UEMURA
- G02 - OPTICS
Information Patent Application
OPTICAL MODULE AND FLEXIBLE SUBSTRATE
- Publication number 20240332273
- Publication date Oct 3, 2024
- Sumitomo Electric Industries, Ltd.
- Hiroshi UEMURA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL SEMICONDUCTOR DEVICE
- Publication number 20240302707
- Publication date Sep 12, 2024
- Sumitomo Electric Industries, Ltd.
- Kosuke SEKIGUCHI
- G02 - OPTICS
Information Patent Application
VARIABLE GAIN AMPLIFIER CIRCUIT
- Publication number 20240275350
- Publication date Aug 15, 2024
- Sumitomo Electric Industries, Ltd.
- Yoshiyuki SUGIMOTO
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
RECEIVER CIRCUIT AND OPTICAL RECEIVER CIRCUIT
- Publication number 20240214077
- Publication date Jun 27, 2024
- Sumitomo Electric Industries, Ltd.
- Yoshiyuki SUGIMOTO
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
RECEIVER CIRCUIT AND OPTICAL RECEIVER CIRCUIT
- Publication number 20240195370
- Publication date Jun 13, 2024
- Sumitomo Electric Industries, Ltd.
- Seiji KUMAGAI
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
OPTICAL MODULE ASSEMBLY, OPTICAL MODULE, PACKAGE FOR OPTICAL MODULE...
- Publication number 20230380056
- Publication date Nov 23, 2023
- Sumitomo Electric Industries, Ltd.
- Taichi MISAWA
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
OPTICAL MODULE ASSEMBLY, OPTICAL MODULE, PACKAGE FOR OPTICAL MODULE...
- Publication number 20230380057
- Publication date Nov 23, 2023
- Sumitomo Electric Industries, Ltd.
- Taichi MISAWA
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
AMPLIFIER CIRCUIT
- Publication number 20230268895
- Publication date Aug 24, 2023
- Sumitomo Electric Industries, Ltd.
- Taichi MISAWA
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
OUTPUT CIRCUIT WITH PEAK VOLTAGE DETECTION
- Publication number 20230258698
- Publication date Aug 17, 2023
- Sumitomo Electric Industries, Ltd.
- Hiroshi UEMURA
- G01 - MEASURING TESTING
Information Patent Application
OPTICAL MODULE AND MANUFACTURING METHOD OF OPTICAL MODULE FOR OPTIC...
- Publication number 20230194905
- Publication date Jun 22, 2023
- Sumitomo Electric Industries, Ltd.
- Keiji TANAKA
- G02 - OPTICS
Information Patent Application
OPTICAL MODULE AND MANUFACTURING METHOD OF OPTICAL MODULE FOR OPTIC...
- Publication number 20230194903
- Publication date Jun 22, 2023
- Sumitomo Electric Industries, Ltd.
- Hiroshi UEMURA
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
RECEPTION CIRCUIT FOR OPTICAL COMMUNICATION
- Publication number 20230092750
- Publication date Mar 23, 2023
- Sumitomo Electric Industries, Ltd.
- Yoshiyuki SUGIMOTO
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
RECEIVER CIRCUIT FOR OPTICAL COMMUNICATION
- Publication number 20230011340
- Publication date Jan 12, 2023
- Sumitomo Electric Industries, Ltd.
- Seiji KUMAGAI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PRINTED BOARD AND PRINTED BOARD ASSEMBLY
- Publication number 20220295630
- Publication date Sep 15, 2022
- Sumitomo Electric Industries, Ltd.
- Taichi MISAWA
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
ELECTROSTATIC PROTECTION CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT
- Publication number 20220158448
- Publication date May 19, 2022
- SUMITOMO ELECTRIC INDUSTRIES, LTD.
- Hiroshi UEMURA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
DRIVING CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT
- Publication number 20220157217
- Publication date May 19, 2022
- Sumitomo Electric Industries, Ltd.
- Hiroshi UEMURA
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Application
ELECTROSTATIC PROTECTION CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT
- Publication number 20220158447
- Publication date May 19, 2022
- Sumitomo Electric Industries, Ltd.
- Hiroshi UEMURA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
VARIABLE GAIN AMPLIFIER CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT
- Publication number 20220149790
- Publication date May 12, 2022
- Sumitomo Electric Industries, Ltd.
- Hiroshi UEMURA
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
AMPLITUDE MODULATION CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT F...
- Publication number 20220149826
- Publication date May 12, 2022
- Sumitomo Electric Industries, Ltd.
- Hiroshi UEMURA
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
TRANSIMPEDANCE AMPLIFIER FOR RECEIVING BURST OPTICAL SIGNAL
- Publication number 20220109507
- Publication date Apr 7, 2022
- Sumitomo Electric Industries, Ltd.
- Keiji TANAKA
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
RECEIVING CIRCUIT AND OPTICAL RECEIVING CIRCUIT
- Publication number 20220057262
- Publication date Feb 24, 2022
- Sumitomo Electric Industries, Ltd.
- Seiji KUMAGAI
- G01 - MEASURING TESTING
Information Patent Application
OPTICAL SEMICONDUCTOR DEVICE, OPTICAL TRANSMISSION MODULE, AND OPTI...
- Publication number 20210359761
- Publication date Nov 18, 2021
- Sumitomo Electric Industries, Ltd.
- Taichi MISAWA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSIMPEDANCE AMPLIFIER CIRCUIT
- Publication number 20210159858
- Publication date May 27, 2021
- Sumitomo Electric Industries, Ltd.
- Yoshiyuki SUGIMOTO
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
OPTICAL RECEIVER AND TRANSIMPEDANCE AMPLIFIER CIRCUIT
- Publication number 20210126602
- Publication date Apr 29, 2021
- Sumitomo Electric Industries, Ltd.
- Naoki Itabashi
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
DIFFERENTIAL AMPLIFIER CIRCUIT HAVING VARIABLE GAIN
- Publication number 20210126604
- Publication date Apr 29, 2021
- Sumitomo Electric Industries, Ltd.
- Naoki Itabashi
- H03 - BASIC ELECTRONIC CIRCUITRY

Keiji Tanaka

Person

Patents Grantslast 30 patents

Reception circuit for optical communication

Optical module assembly, optical module, package for optical module...

Output circuit with peak voltage detection

Optical module assembly, optical module, package for optical module...

Optical module and manufacturing method of optical module for optic...

Variable gain amplifier circuit and semiconductor integrated circuit

Receiver circuit for optical communication

Electrostatic protection circuit and semiconductor integrated circuit

Driving circuit and semiconductor integrated circuit for use in an...

Electrostatic protection circuit and semiconductor integrated circuit

Printed board and printed board assembly

Transimpedance amplifier for receiving burst optical signal

Optical receiver and transimpedance amplifier circuit

Amplitude modulation circuit and semiconductor integrated circuit f...

Receiving circuit and optical receiving circuit

Differential amplifier circuit having variable gain

Transimpedance amplifier circuit

Optical semiconductor device, optical transmission module, and opti...

Transimpedance amplifier circuit

Transimpedance amplifier circuit

Transimpedance amplifier circuit

Differential amplifier circuit having stable gain

Mover control system, mover system, mover control method, and non-t...

Transimpedance amplifier for receiving burst optical signal

Driver circuit

Optical modulator

Laser driver circuit and optical transmitter using the same

Variable gain amplifier and driver implementing the same

Amplifier

Driver for pulse amplitude modulation and optical transmitter imple...

Patents Applicationslast 30 patents

OPTICAL MODULE AND FLEXIBLE PRINTED CIRCUIT BOARD

BRIDGE CHIP AND SEMICONDUCTOR INTEGRATED MODULE

PEAKING ADJUSTMENT CIRCUIT

OPTICAL MODULATOR

OPTICAL MODULE

OPTICAL MODULE AND FLEXIBLE SUBSTRATE

OPTICAL SEMICONDUCTOR DEVICE

VARIABLE GAIN AMPLIFIER CIRCUIT

RECEIVER CIRCUIT AND OPTICAL RECEIVER CIRCUIT

RECEIVER CIRCUIT AND OPTICAL RECEIVER CIRCUIT

OPTICAL MODULE ASSEMBLY, OPTICAL MODULE, PACKAGE FOR OPTICAL MODULE...

OPTICAL MODULE ASSEMBLY, OPTICAL MODULE, PACKAGE FOR OPTICAL MODULE...

AMPLIFIER CIRCUIT

OUTPUT CIRCUIT WITH PEAK VOLTAGE DETECTION

OPTICAL MODULE AND MANUFACTURING METHOD OF OPTICAL MODULE FOR OPTIC...

OPTICAL MODULE AND MANUFACTURING METHOD OF OPTICAL MODULE FOR OPTIC...

RECEPTION CIRCUIT FOR OPTICAL COMMUNICATION

RECEIVER CIRCUIT FOR OPTICAL COMMUNICATION

PRINTED BOARD AND PRINTED BOARD ASSEMBLY

ELECTROSTATIC PROTECTION CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT

DRIVING CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT

ELECTROSTATIC PROTECTION CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT

VARIABLE GAIN AMPLIFIER CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT

AMPLITUDE MODULATION CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT F...

TRANSIMPEDANCE AMPLIFIER FOR RECEIVING BURST OPTICAL SIGNAL

RECEIVING CIRCUIT AND OPTICAL RECEIVING CIRCUIT

OPTICAL SEMICONDUCTOR DEVICE, OPTICAL TRANSMISSION MODULE, AND OPTI...

TRANSIMPEDANCE AMPLIFIER CIRCUIT

OPTICAL RECEIVER AND TRANSIMPEDANCE AMPLIFIER CIRCUIT

DIFFERENTIAL AMPLIFIER CIRCUIT HAVING VARIABLE GAIN