Electronic control device, vehicle, and method for manufacturing electronic control device
AssigneeHitachi Automotive Systems, Ltd.
InventorsMasahiro Toyama, Yutaka Uematsu, Hiroki Funato, Hideki Osaka, Mitsuhiro Masuda
Life of this patent
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Abstract
Provided is an electronic control unit, which includes a printed wiring board on which a semiconductor element is mounted, including a power supply pattern and a ground pattern which are formed on the printed wiring board and connected to the semiconductor element, at least one capacitance adjustment pattern which is formed on the printed wiring board, and a connection portion which is provided for each capacitance adjustment pattern and able to switch electrical connection between either the power supply pattern or the ground pattern and the capacitance adjustment pattern.
Claims8
An electronic control unit which includes a printed wiring board on which a semiconductor element is mounted, comprising:
- a power supply pattern and a ground pattern which are formed on the printed wiring board and connected to the semiconductor element;
- at least one capacitance adjustment pattern which is formed on the printed wiring board;
- a connection portion which is provided for each capacitance adjustment pattern and able to switch electrical connection between either the power supply pattern or the ground pattern and the capacitance adjustment pattern;
- a control unit which controls the connection portion based on control software for setting a connection state;
- wherein electrical connection between either the power supply pattern or the ground pattern and the capacitance adjustment pattern is maintained when the control software is executed by the control unit;
- a variable resistor for changing electric resistance between the power supply pattern, the ground pattern, and the capacitance adjustment pattern;
- and
- wherein electric resistance of the variable resistor is controlled by the control unit.
Dependencies are inferred from the claim text.