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75results about How to "Low voltage" patented technology

Semiconductor integrated circuit and method for manufacturing the same

A semiconductor integrated circuit according to the present invention comprises a MOS transistor formed on an SOI substrate and a subsidiary transistor provided between a body node and a drain node of the MOS transistor and sharing a gate electrode with the MOS transistor, whereby body potential of the MOS transistor is controlled by gate and drain potentials. Accumulated body charge in a non-conducting state in the semiconductor integrated circuit is extracted by a resistor formed between the body node and a source, whereby various phenomena caused by floating body effect are eliminated. Since the body potential of the MOS transistor can be varied without creating an undesirable leakage current path, and hence without limitations to supplied voltage, its threshold voltage can be made variable so as to follow change in an input signal, thereby making it possible to achieve higher speed and lower voltage operation of the semiconductor integrated circuit. According to the present invention, it is possible to eliminate floating body effect, which is the greatest problem with an SOI transistor formed on an SOI substrate, and also to achieve lower voltage and greater current operation of a transistor without posing limitations to supplied voltage and without causing the problem of leakage current.
Owner:HITACHI LTD

Accelerator pedal sensor minimum voltage learning method and device as well as vehicle control unit

The application proposes an accelerator pedal sensor minimum voltage learning method and device as well as a vehicle control unit, wherein the method comprises the following steps of acquiring a sensor voltage value corresponding to an accelerator pedal mechanical minimum value when a vehicle key is at an ACC position; and according to the sensor voltage value corresponding to the accelerator pedal mechanical minimum value, the accelerator pedal sensor minimum voltage stored in the vehicle control unit (VCU) EEPROM, and the status of an accelerator pedal sensor, judging in real time whether the sensor voltage value corresponding to the accelerator pedal mechanical minimum value needs to be adjusted, and performing learning adjustment according to a minimum value learning method, so that a sensor voltage corresponding to the accelerator pedal mechanical minimum value can be accurately learned in real time, and travelling safety and driving operation sense can be improved. The initial value of the VCU EEPROM, namely the upper limit of the sensor voltage corresponding to the accelerator pedal mechanical minimum value, is set, so that the accelerator pedal sensor minimum voltage learning method disclosed by the invention can be adapt to different types of accelerator pedals from different manufacturers.
Owner:BEIJING ELECTRIC VEHICLE
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