Japan Science and Technology Agency

Continental Automotive Gmbh

The University of Tokyo

Saginomiya Seisakusho, Inc.

Takeaki Yajima

Akira Toriumi

Hiroshi Toshiyoshi

Matthias Kretschmann

Hiroyuki Mitsuya

Holger Faisst

Hiroaki Honma

Yukiya Tohyama

A spike generation circuit includes a first CMOS inverter connected between a first power supply and a second power supply, an output node of the first CMOS inverter being coupled to a first node that is an intermediate node coupled to an input terminal to which an input signal is input, a switch connected in series with the first CMOS inverter, between the first power supply and the second power supply, a first inverting circuit that outputs an inversion signal of a signal of the first node to a control terminal of the switch, and a delay circuit that delays the signal of the first node, outputs a delayed signal to an input node of the first CMOS inverter, and outputs an isolated output spike signal to an output terminal.

Electronic circuit

A switching circuit includes a switching element of a field-effect type, the switching element being configured to switch between an ON state and an OFF state in accordance with a potential of a control terminal, and a control circuit configured to supply a potential of a first level to the control terminal when maintaining one state of the ON state and the OFF state of the switching element, and make the control terminal floating after charging or discharging the control terminal via a resistor and supply a potential of a second level to the control terminal when switching the switching element from the one state to another state of the ON state and the OFF state, the first level bringing the switching element into the one state, the second level bringing the switching element into said another state.

Switching circuit and power supply circuit

A switching circuit includes a first switching element that has a first control terminal, a connection state between a power generation element and an electric storage device being controlled in accordance with a voltage applied to the first control terminal, and a control circuit configured to output a first voltage to the first control terminal until a voltage difference between both ends of the electric storage device becomes a first predetermined value larger than an initial state when the voltage difference increases from the initial state with time, and output a second voltage to the first control terminal until the voltage difference becomes lower than a second predetermined value smaller than the first predetermined value when the voltage difference exceeds the first predetermined value, the first voltage being a voltage that keeps the first switching element on, the second voltage being a voltage that keeps the first switching element off.

A power conversion circuit includes a first capacitor coupled between an input terminal and a reference potential, a second capacitor coupled between an output terminal and a reference potential, an inductor coupled between the input terminal and the output terminal, storing magnetic field energy when at least part of an input current and a current output from the first capacitor flows through the inductor as a first current, and inducing a second current for charging the second capacitor by the magnetic field energy, and a switching element that is turned on and off at a substantially constant cycle, has a substantially constant period during which the switching element is ON in one cycle, is turned on to cause the first current to flow through the inductor, and is OFF when the second current flows through the inductor.

Power conversion circuit, semiconductor device, and electronic device

An energy harvesting device having an energy converting element that converts environmental energy into electric energy, an environmental sensor that is disposed in an identical environment as the energy converting element, and a power supply circuit that receives electricity from the energy converting element and outputs the electricity to an external load. The power supply circuit is configured to change an operation condition of, for example, a voltage converting circuit of the power supply circuit, in accordance with an output of the environmental sensor.

Environmental energy harvesting device

A current sensor includes an element that is in a high-resistance state when an absolute value of a current flowing between a first terminal and a second terminal is within a first range, and changes to a low-resistance state in which a resistance value is lower than that in the high-resistance state when the absolute value of the current exceeds the first range, and a circuit that supplies a current to be measured to the element, and senses a value of the current to be measured based on at least one of voltages of the first terminal and the second terminal.

Current sensor and power conversion circuit

Detector and power conversion circuit

Spike generation circuit, information processing circuit, power conversion circuit, detector, and electronic circuit

A neuron circuit includes: an input terminal to which spike signals are continuously input; a first switch element that has a first end coupled to the input terminal and a second end coupled to a node, remains in a high resistance state even when a single spike signal is input, and goes into a low resistance state when spike signals are input within a time period; a feedback circuit coupled to the node, and causing the input terminal to be at a level when the first switch element goes into the low resistance state; and a second switch element that is connected in series with the first switch element between the input terminal and the node, remains in a low resistance state even when spike signals are input to the input terminal, and goes into a high resistance state when the input terminal becomes at the level.

Neuron circuit, system, and switch circuit

A device and a method for determining an absolute angular position of a wheel of a vehicle. A wheel unit is mounted on the wheel side and configured to determine data which permit a reference limb of the wheel, and to wirelessly transmit the acquired data. A receiver unit is mounted on the vehicle side and receives the data of the wheel unit. A reference limb-determining device determines the reference limb of the wheel on the basis of the received data. A measuring device generates, in each case, one signal when the wheel rotates by a previously determined angle, and a counting device counts the signals generated by the measuring device. An angle-determining device determines an absolute angular position of the wheel on the basis of the signals counted by the counting device, and on the basis of the specific reference limb.

Growing community of inventors

Tokyo, Japan

Takeaki Yajima