Electronic control device
AssigneeDenso Corporation
InventorsMitsuhiro Kanayama, Takanori Ishikawa, Toru Itabashi
Life of this patent
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Abstract
An electronic control device includes a power supply circuit, electronic circuits, a ground wiring pattern, and a common ground wiring pattern formed in a multi-layered substrate. The ground wiring pattern is dedicated for the power supply circuit and the common ground wiring pattern is provided for all electronic circuits. Even when an electrical potential of the ground wiring pattern varies due to a switching operation of a switching component included in the power supply circuit, the common ground wiring pattern is not affected.
Claims9
An electronic control device having a power supply circuit formed on a multi-layered substrate for adjusting a power supply voltage supplied by an external power supply to a desired level, the power supply circuit including a switching component to which the power supply voltage is applied at an input terminal thereof and which is driven by a duty signal and an output voltage forming circuit for producing an output voltage formed from a voltage inputted from the switching device, comprising;
- a ground wiring pattern dedicated for the output forming circuit;
- a common ground wiring pattern for all electronic circuits included in the electronic control device;
- and
- a connecting part, wherein
- the ground wiring pattern is connected to the output voltage forming circuit and defines a ground electrical potential of the output voltage forming circuit,
- the common ground wiring pattern is formed in a multi-layered substrate and defines a ground electrical potential of each electronic circuit, and
- the connecting part is provided for connecting the ground wiring pattern with the common ground wiring pattern.
Dependencies are inferred from the claim text.