997 patents
Page 27 of 50
Utility
Semiconductor device for internal combustion engine ignition
8 Jun 21
A semiconductor device for internal combustion engine ignition includes: a power semiconductor switching device that switches ON and OFF in accordance with a control signal provided by an external control circuit for causing a spark plug to produce sparks via an ignition coil and an external power source; an auxiliary voltage circuit that generates and applies an auxiliary voltage responsive to a collector voltage of the power semiconductor switching device to the gate of the power semiconductor switching device; and a constant current circuit that regulates current from the auxiliary voltage circuit to the gate of the power semiconductor switching device when a high-voltage surge originating from the external power source is applied to the auxiliary voltage circuit via a primary winding of the ignition coil.
Hideki Miura
Filed: 8 May 18
Utility
Method of testing semiconductor device
8 Jun 21
A first relational expression for a temperature of a semiconductor device and forward voltage of a temperature measurement diode is obtained in advance.
Yuki Sawa
Filed: 27 Jan 20
Utility
Temperature detection device and power conversion device
1 Jun 21
A temperature detection device which receives a temperature signal from a temperature sensor and outputs an electrical signal corresponding to the temperature signal.
Hidetomo Ohashi
Filed: 29 Mar 19
Utility
Generation source analyzing device and generation source analyzing system
1 Jun 21
An analyzing device is provided, which can accurately analyze information related to generation sources.
Naoki Takeda, Bo Li, Yoshiki Hasegawa, Kazuhiro Koizumi, Yu Kawamura
Filed: 22 Feb 18
Utility
Coin detection antenna and coin processing device
1 Jun 21
A coin detection antenna includes a substrate and a plurality of air core coils of track shape including a wiring pattern provided on the substrate.
Ryuuichi Nagashima, Michiru Fujita, Hirotaka Yoshimatsu
Filed: 24 Sep 18
Utility
Cooling apparatus, semiconductor module, and vehicle
25 May 21
A semiconductor module is provided, where a coolant circulation portion of a cooling apparatus has a first coolant flow channel and a second coolant flow channel arranged so as to sandwich therebetween a fin region in which a cooling fin is provided, and each having two ends in a longitudinal direction, a casing portion of the cooling apparatus includes a first opening provided on an end side corresponding to a first end of the first coolant flow channel and a second opening provided on an end side corresponding to a second end of the second coolant flow channel, the second end and the first end are arranged on the same side of the casing portion, and the first coolant flow channel and the second coolant flow channel are each at least partly provided below the cooling fin.
Nobuhide Arai
Filed: 20 Feb 19
Utility
Detection apparatus, power conditioner, detection method, and computer readable medium
25 May 21
An islanding operation is detected appropriately through interconnection to the power grid which may have various characteristics.
Takayuki Nagakura, Hideyuki Ito
Filed: 27 Feb 19
Utility
Short circuit detector including a voltage detector
25 May 21
A first aspect of the present invention will provide a short circuit detector, including: a voltage detection circuit to detect gate voltage which is input from a gate driving circuit to the semiconductor element; and a short circuit detection circuit to detect a short circuit state of the semiconductor element, when gate voltage of the semiconductor element becomes higher than or equal to first reference voltage in a transition period from when a turn-on signal is input to the gate driving circuit until when a mirror period of the semiconductor element starts.
Hirotoshi Kaneda
Filed: 24 Apr 18
Utility
Cooling apparatus, semiconductor module, vehicle, and manufacturing method
18 May 21
A cooling apparatus for a semiconductor module including a semiconductor chip, having a case with a top plate, a base plate, a side wall plate arranged between the top plate and the base plate, and a coolant flow-through portion surrounded by the top plate, base plate, and side wall plate; first cooling pins secured to the top plate in the coolant flow-through portion of the case; and second cooling pins secured to the top plate in the coolant flow-through portion of the case and having lengths in a thickness direction from the top plate toward the base plate greater than lengths of the first cooling pins, wherein at least one first cooling pin and at least one second cooling pin are arranged in an alternating manner, and this pattern appears repeatedly at least twice, along a first direction in a plane parallel to the top plate.
Nobuhide Arai
Filed: 22 Apr 19
Utility
Inverter device and control circuit therefor, and motor driving system
18 May 21
An inverter device includes gate driving circuits for upper and lower arms of a bridge circuit, a first power supply supplying a power supply voltage to each driving circuit, and a second power supply having a reference potential different from that of the first power supply.
Masaki Hirakata
Filed: 21 Feb 20
Utility
Semiconductor device
18 May 21
A semiconductor device includes a main power semiconductor switching element, a current sense semiconductor switching element and a current sense semiconductor switching element protection circuit.
Sho Nakagawa
Filed: 28 Dec 18
Utility
Switching power supply control circuit with bottom point detection
11 May 21
A switching power supply apparatus includes a switching device and a switching power supply control circuit for converting an AC source voltage to a DC voltage.
Koji Sonobe, Yu-Wei Chung
Filed: 30 Oct 18
Utility
Switching power supply controller
11 May 21
A switching power supply controller, including a high-side drive circuit, a low-side drive circuit, a control circuit which supplies a high-side drive signal to the high-side drive circuit, and which supplies a low-side drive signal to the low-side drive circuit, an oscillation circuit which generates an on-trigger signal and an off-trigger signal at a switching frequency corresponding to a voltage signal, and which supplies the on-trigger signal and the off-trigger signal to the control circuit, and a precharge circuit which receives from the control circuit a burst operation signal, indicative of a burst operation in a standby mode, and which supplies for a second period a precharge signal that causes the control circuit to output the low-side drive signal upon detecting that a switching stop period, during which the first voltage signal falls below a threshold voltage, exceeds a first period.
Jian Chen
Filed: 30 Dec 19
Utility
Method of producing laminated substrate, method of producing semiconductor module, laminated substrate, and semiconductor module
11 May 21
A method of manufacturing a laminated substrate including an insulation substrate comprised of ceramic, and a front electrode formed on a front surface of the insulation substrate, a semiconductor element being mountable on a front surface of the front electrode, including forming the front electrode on the front surface of the insulation substrate, and before or after the forming the front electrode, applying laser processing to the front surface of the insulation substrate at an outer peripheral area of the front electrode to modify a conductive property of the front surface of the insulation substrate to have electrical conductivity.
Keisuke Yamashiro
Filed: 1 Jul 19
Utility
Silicon carbide insulated-gate power field effect transistor
11 May 21
Insulated gate semiconductor device includes drift layer of first conductivity type; first base region of second conductivity type on the drift layer; carrier-supply region of the first conductivity type on the first base region and having higher impurity concentration than the drift layer; a first contact region of the second conductivity type on the first base region and having higher impurity concentration than the first base regions; cell-pillars each having polygonal-shape, arranged in a lattice-pattern, sidewalls of the cell-pillars are defined by trenches penetrating the carrier-supply region, the first contact region, and the first base region; and insulated-gate electrode-structures in the trenches.
Syunki Narita
Filed: 29 Apr 19
Utility
Semiconductor unit, semiconductor module, and semiconductor device having terminal region extending in parallel to the transistors
4 May 21
A semiconductor unit includes: a plurality of transistor chips arranged in a plurality of parallel rows, each transistor chip respectively having a first main electrode on one surface and a second main electrode on another surface; a first conductor layer electrically connected to the first main electrodes of the transistor chips, both corner portions on one end of the first conductor layer being drawn out in a direction in which the rows of transistor chips run; a second conductor layer arranged between the both corner portions of the first conductor layer; and a wiring substrate that is arranged on a side of the second main electrodes of the plurality of transistor chips and includes a wiring layer electrically connected to the second main electrodes of the plurality of transistor chips and to the second conductor layer.
Masashi Hoya, Katsumi Taniguchi, Naoyuki Kanai
Filed: 10 Sep 19
Utility
Semiconductor device and method for manufacturing semiconductor device
4 May 21
A semiconductor device includes a plurality of broad buffer layers provided in a drift layer.
Michio Nemoto, Takashi Yoshimura
Filed: 19 Nov 20
Utility
Semiconductor device
4 May 21
In a trench-gate MOSFET, between a channel and an n+-type source region, an n-type shunt resistance region is provided in contact with the n+-type source region and the channel.
Keiji Okumura
Filed: 23 Sep 19
Utility
Power conversion device
4 May 21
A power conversion device, that includes a drive circuit 11a that drives a switching element 4 included in an upper-arm for one of three phases, a drive circuit 11b that drives a switching element 5 included in a lower-arm for the one phase, and a control circuit 9 that transmits a control signal to the drive circuits 11a, 11b, is provided.
Masaki Hirakata, Akihiro Odaka
Filed: 23 Jul 18
Utility
Detection device, control device, and inverter device
4 May 21
A detection error occurs due to ripple when a current transformer detects zero cross of current.
Masahiro Sasaki
Filed: 1 Aug 19