Patents Assigned to Seiko Instruments Inc.
  • DC/DC converter and electronic apparatus
    Patent number: 9160230
    Abstract: To provide a DC/DC converter equipped with a clamp circuit having low power consumption, and reducible in chip area. A clamp circuit which clamps an output terminal of an error amplifier circuit equipped with an amplifier and a first transistor connected to an output terminal of the amplifier is configured to include a second transistor having a source connected to a source of the first transistor, a gate connected to a constant voltage circuit, and a drain connected to a constant current circuit, and a third transistor having a gate connected to the drain of the second transistor and a drain connected to the output of the amplifier.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: October 13, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventor: Kosuke Takada
  • Information processing device and information processing program
    Patent number: 9158937
    Abstract: An information processing device manages the protection state of original data by long-term signature data in storage-target data obtained by combining the long-term signature data and the original data. Management information having a management-target value for each management item obtained from the storage-target data recorded therein is acquired. A management-target value of a predetermined management item is acquired from the acquired management information. The acquired management-target value is compared with a value acquired from the storage-target data or a value acquired from the outside to determine the state of management. A result corresponding to the determined state of management is outputted.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: October 13, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventor: Shinichi Murao
  • Biological information detecting apparatus and fixing structure
    Patent number: 9138158
    Abstract: A biological information detecting apparatus has an apparatus main body, a pair of biological signal detecting parts provided on the apparatus main body, a fixing part attached to the apparatus main body, holders provided to be slidable along a longitudinal direction of the fixing part, and joining parts configured to releasably join the pair of biological signal detecting parts to the respective holders. Each of the biological signal detecting parts has an electrode adapted to be in contact with a biological surface of a user's body. The fixing part is configured to fix the apparatus main body and the pair of biological signal detecting parts to the user's body.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: September 22, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Hideki Okuda, Teruo Kato, Dai Terasawa
  • Voltage regulator
    Patent number: 9141121
    Abstract: Provided is a voltage regulator capable of suppressing excessive overshoot at the output terminal when the power supply fluctuates in a non-regulate state. The voltage regulator includes: an error amplification circuit that amplifies a difference between reference voltage and divided voltage, thus controlling a gate of an output transistor; an amplifier that compares the reference voltage and the divided voltage to detect overshoot at the output voltage; a first transistor that lets current that is proportional to current flowing through the output transistor pass therethrough; a current mirror circuit that mirrors current that is proportional to the current flowing through the output transistor; and a first bias circuit connected to the amplifier via the current mirror circuit, the first bias circuit increasing bias current of the amplifier to increase a response speed.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: September 22, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Yotaro Nihei, Manabu Fujimura
  • Charge/discharge control circuit and battery device
    Patent number: 9142868
    Abstract: Provided are a charge/discharge control circuit having a self-test function, which can dispense with a complicated test device, and a battery device. The battery device includes the charge/discharge control circuits each including a pull-up/pull-down circuit provided at a terminal to which a secondary battery is to be connected. When a self-test start signal is input so as to enter a self-test state, a self-test control circuit controls the pull-up/pull-down circuit, to thereby perform a test on a voltage detection circuit provided at the terminal to which the secondary battery is to be connected. When the self-test is finished, a self-test start signal is output to a next-stage charge/discharge control circuit, to thereby perform a test sequentially on the voltage detection circuits of the cascade-connected charge/discharge control circuits.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: September 22, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Atsushi Sakurai, Kazuaki Sano
  • Semiconductor device having an ESD protection circuit
    Patent number: 9142543
    Abstract: An ESD protection circuit having a smaller area is provided. The ESD protection circuit includes: a P-type diffusion resistor 12 whose one end is connected to an input terminal 11 formed in the N-type well; a diode 14 disposed between the diffusion resistor 12 and the N-type well connected to the power supply terminal; an NMOS transistor 15 whose drain is connected to the other end of the diffusion resistor 12; and a parasitic diode formed between the power supply terminal and the ground terminal.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: September 22, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Takashi Katakura, Hirofumi Harada, Yoshitsugu Hirose
  • Battery protection IC and battery device
    Patent number: 9142983
    Abstract: Provided are a battery protection IC and a battery device, which are capable of ensuring safety even when a charger is connected in a reverse direction. The battery protection IC includes a first switch element provided between an overcurrent detection terminal and a VDD terminal so that, when the charger is connected with reverse polarity, the first switch element interrupts a current path between the overcurrent detection terminal and the VDD terminal. The battery protection IC further includes a second switch element provided between a charge control terminal and the VDD terminal so that, when the charger is connected with reverse polarity, the second switch element interrupts a current path between the charge control terminal and the VDD terminal.
    Type: Grant
    Filed: July 19, 2012
    Date of Patent: September 22, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Yuichiro Kitajima, Naoto Kobayashi
  • Biological information detecting device
    Patent number: 9131894
    Abstract: Provision of a biological information detecting device capable of stably detecting a biological signal in good condition. A device body, a pair of electrode portions 26A and 26B provided in the device body and respectively contacting a biological surface and a band-shaped fixing band 30 for covering the pair of electrode portions 26A and 26B and fixing the device body to a body are provided, and a guide portion 40A which allows relative movement between each of the electrode portions 26A/26B and the fixing band 30 in an extending direction of the fixing band 30 and restricts movement in a width direction orthogonal to the extending direction is arranged between each of the electrode portions 26A/26B and the fixing band 30.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: September 15, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Teruo Kato, Hideki Okuda, Dai Terasawa, Takahiro Kaneko
  • Semiconductor integrated circuit device
    Patent number: 9136145
    Abstract: Provided is a semiconductor integrated circuit device having flexible pin arrangement. A semiconductor integrated circuit is bonded to a die pad with an insulating paste, and the potential of the die pad is fixed through a bonding wire from an Al pad provided on the surface of the semiconductor integrated circuit. In the case of a P-type semiconductor substrate, the die pad is set as a terminal other than a terminal having a minimum operating potential of the semiconductor integrated circuit.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: September 15, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventor: Hirofumi Harada
  • Resin-encapsulated semiconductor device and method of manufacturing the same
    Patent number: 9136247
    Abstract: A resin-encapsulated semiconductor device is manufactured by mounting semiconductor elements on respective die pad portions of a frame. Electrodes on the surface of the semiconductor elements are wire bonded to lead portions of the frame. The die pad portions, semiconductor elements and lead portions are encapsulated with resin, leaving a bottom surface part of the lead portions exposed. The lead portions are partially cut by a rotary blade from an upper side of the resin to form concave parts in the lead portions, which are wet-etched to form exposed lead upper end parts. A plated layer is formed on the lead upper end parts and the lead bottom surface parts. The remaining parts of the lead portions with the plated layer are cut to separate the resin-encapsulated semiconductor device into individual pieces.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: September 15, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventor: Noriyuki Kimura
  • Semiconductor device and method of manufacturing the same
    Patent number: 9136208
    Abstract: A semiconductor device has an encapsulating resin for covering a semiconductor chip and an outer lead extending from a side surface of the encapsulating resin. An inclined portion is formed in a bottom surface of the outer lead. A through recessed portion is formed in an end surface of the outer lead so as to vertically pass through the outer lead from an upper surface of the outer lead to the inclined portion. A thick plated layer covers the inclined portion and an inner surface of the through recessed portion. A thin plated layer covers the end surface of the outer lead.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: September 15, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventor: Yasuhiro Taguchi
  • Electronic device and method for manufacturing electronic device
    Patent number: 9137897
    Abstract: An electronic device includes a glass substrate, an electronic element mounted on one surface of the glass substrate, a cover body covering the electronic element and bonded to the glass substrate and a through electrode penetrating from one surface to the other surface of the glass substrate. The through electrode is composed of an iron-nickel based alloy and; and a nickel film is formed on an end face of the through electrode exposing on the other surface of the glass substrate and on the other surface of the glass substrate located in the vicinity of the end face.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: September 15, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventor: Atsushi Kozuki
  • Semiconductor device
    Patent number: 9136263
    Abstract: Provided is a semiconductor device which uses a comb-like N-type MOS transistor as an ESD protection element and is capable of uniformly operating the entire comb-like N-type MOS transistor. By adjusting a length L of a gate electrode of the N-type MOS transistor used as the ESD protection element in accordance with the distance from a contact for fixing a substrate potential, which is provided on a guard ring around an outer periphery, respective portion of N-type MOS transistor represented as a comb teeth uniformly enter snap-back operation, permitting avoidance of local concentration of current and obtainment of a desired ESD tolerance.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: September 15, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Takeshi Koyama, Tomomitsu Risaki
  • Sensor device
    Patent number: 9128127
    Abstract: Provided is a sensor device capable of removing the influence of each offset voltage of a sensor element, a differential amplifier, and an amplifier of the sensor device, to thereby detect a physical quantity with high precision.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: September 8, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Minoru Ariyama, Daisuke Muraoka, Tomoki Hikichi, Kentaro Fukai
  • Balance with hairspring, movement, and timepiece
    Patent number: 9128465
    Abstract: To provide a timepiece balance with hairspring capable of changing the moment of inertia of the balance wheel without involving generation of a one-sidedness in weight. There is provided a balance with hairspring including a balance staff, and a balance wheel arranged around the balance staff, wherein there are provided a first rim constituting the balance wheel and having a guide portion configured to vary in the distance from the balance staff in correspondence with a peripheral direction around the balance staff, an elastic portion arranged so as to be slidable along the guide portion and capable of elastic deformation in the radial direction around the balance staff, and a second rim having a plurality of weight portions arranged in the peripheral direction.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: September 8, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Takuma Kawauchiya, Takashi Niwa, Masahiro Nakajima
  • Electronic instrument and electronic timepiece
    Patent number: 9128467
    Abstract: An electronic instrument has a power unit configured to allow insertion of a cell and to supply an electric power output from the inserted cell, a charging unit configured to charge the cell inserted in the power unit, and a voltage detecting unit configured to detect a voltage value of the cell inserted in the power unit. A cell type determining unit is configured to determine that the cell inserted in the power unit is a secondary cell as a rechargeable battery when the voltage value detected by the voltage detecting unit is a value equal to or lower than a predetermined threshold value and to determine that the cell inserted in the power unit is a primary cell as a non-rechargeable battery when the voltage value detected by the voltage detecting unit is larger than the predetermined threshold value.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: September 8, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventor: Yoshinori Sugai
  • Long-term signature terminal, long-term signature server, long-term signature terminal program, and long-term signature server program
    Patent number: 9130973
    Abstract: A long-term signature terminal acquires storage-target data and electronic signature data corresponding to the acquired storage-target data. The acquired electronic signature data is transmitted to a server, and electronic signature data having a time stamp applied thereto is received from the server. The received electronic signature data with the applied time stamp is combined with the acquired storage-target data to generate signed data. Verification information for verifying the validity of the electronic signature data having the time stamp is received from the server and applied to the signed data to generate first long-term signature data. Confirmation data for confirming unfalsification of the generated long-term signature data is generated and transmitted to the server, and the confirmation data having a time stamp applied thereto is received from the server.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: September 8, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventor: Shinichi Murao
  • Output circuit, temperature switch IC, and battery pack
    Patent number: 9118326
    Abstract: An output circuit has a smaller area and restrains outputs from becoming unstable even if a power supply voltage is lower than an operating voltage. A supply terminal of an inverter circuit is provided with switch circuit, and the switch circuit stops the operation of the inverter circuit when the power supply voltage is lower than the operating voltage of the circuit. Further, the output terminal of the inverter circuit is provided with a current source to fix the output to the power supply voltage when the operation of the inverter circuit is stopped.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: August 25, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Masahiro Mitani, Naohiro Hiraoka, Masakazu Sugiura, Atsushi Igarashi
  • Device identification apparatus and remote control system
    Patent number: 9117365
    Abstract: Each device identification apparatus includes a circuit for generating a delay time and transmits a device identification code signal at a different delay time in response to a device selecting signal from a remote controller, thereby making it possible to prevent interference. Further, an infrared light amount detecting circuit is provided in a device identification apparatus or a remote controller, and an electronic device to which a device identification apparatus having a higher intensity of infrared is attached is displayed on the remote controller so that the electronic device is easily selected.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: August 25, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Hironori Yano, Fumiyasu Utsunomiya
  • Method of manufacturing semiconductor device having pad region for wire-bonding
    Patent number: 9117799
    Abstract: In a method of manufacturing semiconductor device, an insulating film is provided on a surface of a semiconductor substrate, a porous metal film containing numerous voids is formed on a region of the insulating film, and a protective film is provided on the porous metal film. The protective film is provided with an opening portion on the porous metal film, with the opening portion defining a pad region. A wire is wire-bonded to the porous metal film in the pad region.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: August 25, 2015
    Assignee: SEIKO INSTRUMENTS INC.
    Inventor: Masaru Akino