Automotive electronic control systems
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United States of America Patent
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-
Dec 19, 1995
Grant Date -
N/A
app pub date -
Apr 27, 1993
filing date -
Nov 3, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method of increasing the immunity of an automotive electronic control system to electromagnetic interference, comprises the steps of measuring the impedance of means conducting an input to a control circuit (4) of the system, and adapting the circuit so as at least substantially to match the input impedance of the control circuit (4) in relation to that input to the measured impedance of said means (2) conducting said input. The invention also provides an automotive electronic control system comprising a control circuit (4) having its input impedance at least substantially the same as, and preferably at least substantially matched to, the impedance of means (2) conducting the relevant input to the control circuit.
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