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Assignee: Mitsumi Electric Co., Ltd.


Location: Tokyo, JP
No. of patents: 705

1                      
NumberTitleIssue Date
8184207Image signal input circuit
An image signal input circuit includes an input terminal configured to receive an image signal, a clamp circuit configured to hold a sink chip voltage contained in the image signal to be a constant value, a level shift circuit that includes a first emitter follower ...
05/22/2012
8183835Battery pack
A battery pack including a protection circuit configured to detect over-charge, over-discharge and over-current of a rechargeable battery to turn off a switch element, the switch element provided at a wire provided between the rechargeable battery and a load circuit...
05/22/2012
8183715Reverse current preventing circuit and power source switching apparatus
A reverse current preventing circuit of an N channel type switching MOS transistor connected between a voltage input terminal and an output terminal to control a conduction state between the voltage input terminal and the output terminal, the circuit comprises: a fi...
05/22/2012
8174455Antenna element with improved radiation characteristics
An antenna element is disclosed. A substrate is made of dielectric material and has a first face. A first antenna element is made of conductive material and is provided on the first face. A first power feeding portion is made of conductive material and is disposed o...
05/08/2012
8174345Vibration generator
A vibration generator 1 has an attachment structure of a spring by which the attachment error of the spring elastically supporting a mover composed of a magnet and a yoke does not become the error of the span of the spring to make it possible to improve the e...
05/08/2012
8172587Card connector and detection switch
The card connector can adequately detect the state in which an electronic device such as a memory card to be inserted and removed is fitted, and saves the footprint for mounting the card connector. With this card connector, a card detection switch detects a state in...
05/08/2012
8149019Chopper type comparator and A/D converter
A chopper type comparator including a first power supply line to which a first power source is supplied, a second power supply line to which a second power source having lower voltage than the first power source is supplied, a reference voltage input part to which a...
04/03/2012
8148946Battery pack having protection circuit for secondary battery
A battery pack has first through third external terminals connected to positive and negative power supply terminals and a voltage detection terminal, respectively. A secondary battery is connected between the first external terminal and the third external terminal. ...
04/03/2012
8148213Method of producing a biosensor
A method for manufacturing a biosensor includes forming a laminate of a first silicon oxide film and a polysilicon film on one surface of a silicon substrate; forming a second silicon oxide film on the other surface of the silicon substrate; forming a source electro...
04/03/2012
8134520Antenna apparatus
An antenna apparatus is disclosed. A circuit board has a first face, a second face opposite to the first face, and an edge formed with a notch connecting the first face and the second face. A circuit is arranged on the first face. An antenna element is configured to...
03/13/2012
8131027Finger contact detecting apparatus, finger contact detecting method, fingerprint reading apparatus and computer-readable recording medium
A finger contact detecting apparatus, which detects a finger being swept on a fingerprint sensor of the finger contact detecting apparatus, the finger contact detecting apparatus including, a pixel data averaging unit calculating an average value of pixel data colle...
03/06/2012
8131025Fingerprint detection apparatus
A fingerprint detection apparatus for obtaining an image of a fingerprint of a finger by using a light source for emitting a light to the finger and an image obtaining part for outputting electric signals in correspondence with received light is disclosed. The finge...
03/06/2012
8119944Electronic device
An electronic device adapted to be mounted on a circuit board is disclosed. A housing is made of an insulative material. The housing includes a first face adapted to oppose the circuit board, a second face and a third face which respectively intersect with the first...
02/21/2012
8115130Electronic device
A switch-type electronic device adapted to be mounted on a circuit board is disclosed. A housing is made of an insulative material. The housing includes a first face adapted to oppose the circuit board and a second face intersecting with the first face and formed wi...
02/14/2012
8094088Antenna apparatus
In an antenna apparatus, a radiation element includes a perturbation element. A first power feeding line has a first end connected to the radiation element and is configured to feed power to the radiation element. A second power feeding line has a first end configur...
01/10/2012
8091212Method of manufacturing panel switch
A method of manufacturing a panel switch is provided. The panel switch includes insulating films and a base layer having a stationary contact. Each insulating film includes an adhesive layer, and an apex portion of a moving contact adhered to the adhesive layer. The...
01/10/2012
8077768Digital signal processing apparatus
A digital signal processing apparatus for converting an analog signal to a digital signal and digitally processing the digital signal is disclosed. The apparatus includes a modulation part for performing pulse density modulation on the analog signal and outputting a...
12/13/2011
8076904Circuit for detecting remaining battery capacity
A disclosed circuit for detecting remaining battery capacity includes: a current detection unit detecting a charge and discharge current of a battery; a remaining capacity measurement unit measuring remaining capacity of the battery by integrating the charge and dis...
12/13/2011
8072008Biosensor having ultra fine fiber
A high-sensitivity field effect transistor using as a channel ultrafine fiber elements such as carbon nanotube, and a biosensor using it. The field effect transistor comprises a substrate, a source electrode and a drain electrode arranged on the substrate, a channel...
12/06/2011
8059872Fingerprint image forming apparatus, finger movement amount calculation method, and fingerprint image forming method
A disclosed apparatus for forming a fingerprint image includes a partial sensor configured to obtain partial images of a fingerprint of a finger moving over the partial sensor; a reference image storing unit configured to store a reference partial image; and an imag...
11/15/2011
8040698Flyback switching power apparatus with synchronous rectification and load detection
Disclosed a switching power source apparatus including: a transformer including a primary winding and a secondary winding; a switching element to intermittently apply a voltage to the primary winding by an on-off operation; and a synchronous rectifying element to re...
10/18/2011
8026864Antenna device, antenna element and antenna module
An antenna element includes: an antenna plate; an antenna probe formed monolithically with the antenna plate and extending in a vertical direction from the antenna plate; a ground plate disposed in parallel to the antenna plate at a distance; and a dielectric spacer...
09/27/2011
8014441Communication channel establishing method, communication system, and communication apparatus
A communication channel establishing method is provided that is used in a communication system including a base station that transmits a beacon on a predetermined communication channel and a communication apparatus that receives the beacon from the base station and ...
09/06/2011
8004904Semiconductor integrated circuit device
A semiconductor integrated circuit device capable of shortening a chip reset period (time) is provided. The semiconductor integrated circuit device has a nonvolatile memory which performs a reading operation of trimming information after completion of precharge of a...
08/23/2011
8004291Bioelectric impedance measuring circuit
A bioelectric impedance measuring circuit for applying a current to an organism and measuring a bioelectric impedance of the organism is disclosed that includes a pseudo-sine wave generating circuit for generating a pseudo-sine wave based on an input square wave, a ...
08/23/2011
7987727Semiconductor pressure sensor and fabrication method thereof
A semiconductor pressure sensor is provided that includes a diaphragm, a resistive element arranged at an upper portion of the diaphragm, an insulating film arranged on an upper face of the resistive element and an upper face of the diaphragm, a via that penetrates ...
08/02/2011
7955103Connector
A connector adequately detects a state of an electronic component such as a memory card which is fitted in the connector by way of insertion, even when scrapes of a housing of the electronic component are produced due to insertion and removal of the electronic compo...
06/07/2011
7952400Reset device
A disclosed reset device for outputting a reset signal based on a magnitude of an input power supply voltage includes: a power supply voltage monitoring unit including a comparator to which a detection voltage detected based on the magnitude of the power supply volt...
05/31/2011
7929244Magnetic tape recording/reproducing apparatus
A magnetic tape recording/reproducing apparatus is disclosed that selectively loads a first tape cassette accommodating a first magnetic tape or a second tape cassette accommodating a second magnetic tape having a width greater than the width of the first tape. The ...
04/19/2011
7928887Analog/digital conversion device
An disclosed analog/digital conversion apparatus for converting an analog signal into digital data by cycling the analog signal through a fully differential amplifier circuit includes a polarity switching unit configured to switch connection polarities of the fully ...
04/19/2011
7904075Communication method, communication system, and communication apparatus
There is disclosed a communication method of a communication system having a base station for transmitting a beacon and a terminal for receiving the beacon transmitted from the base station and performing communication with the base station, the communication method...
03/08/2011
7899000Communication method, communication system, and communication apparatus
There is disclosed a communication method of a communication system having a base station for performing a call and a terminal for returning a response to the call from the base station, the communication method including the steps of: transmitting the call by the b...
03/01/2011
7898151Ultrasonic sensor having a piezoelectric element
An ultrasonic sensor having a piezoelectric element including first and second electrodes is disclosed. The ultrasonic sensor includes an aluminum case having a bottom part electrically contacting the second electrode of the piezoelectric element, a first conductive...
03/01/2011
7896705Interface connector and plug
An interface connector makes parts to be fitted by insertion hold the state where a receptacle and a plug are fitted, and removes the plug easily from the receptacle when load is applied to the plug from a direction other than the insertion direction. In the interfa...
03/01/2011
7896699Interface connector
An interface connector makes the pitches between the contacts narrower and realizes miniaturization of the connector. This connector (100) has: a shield case (110) that includes a fitting slot (101) into which an electronic component inserted fr...
03/01/2011
7896688Electrical connector with flexible circuit board
A contact pin is accommodated in the housing body such that a first end portion of which is adapted to be subjected to soldering and is projected from an outer face of the housing body. A cover body including upper cover (17) and lower cover (18) is co...
03/01/2011
7893879Antenna apparatus
An antenna apparatus includes: a circuit board that has a main surface and a rear surface opposite to each other; an antenna element that is formed of a metal plate and is arranged at a predetermined distance from the main surface of the circuit board; a plurality o...
02/22/2011
7885502Waveguide film cable
A disclosed waveguide film cable includes a waveguide formed on a film. The waveguide film cable includes a coating film made of a material having a Young's modulus smaller than or equal to the Young's modulus of a material that forms the film and/or the waveguide a...
02/08/2011
7847324MOS transistor and semiconductor integrated circuit
A MOS transistor includes plural transistor cell blocks arranged adjacently in parallel to one another, wherein the plural transistor cell blocks are configured to have plural transistor cells, plural boundaries that are parallel to the plural transistor cells, and ...
12/07/2010
7864027Electronic tag system, communication apparatus, and electronic tag
A disclosed system includes electronic tags and a communication apparatus that communicates with the electronic tags and includes management information to manage the electronic tags. In the disclosed system, each of the electronic tags contains an ID a part of whic...
01/04/2011
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