LEVEL SIGNAL OUTPUT DEVICE

PROBLEM TO BE SOLVED: To provide a level signal output device that surely prevents malfunction of a vehicle device by preventing the voltage level of a switch source output port from being equal to the voltage level of a switch destination output port. SOLUTION: An ECU(electronic control unit) 1 is...

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Bibliographic Details
Main Authors KOBAYASHI HIDETOSHI, FUKITA KATSUNORI
Format Patent
LanguageEnglish
Published 30.06.2000
Edition7
Subjects
BASIC ELECTRONIC CIRCUITRY
CODE CONVERSION IN GENERAL
CODING
DECODING
ELECTRICITY
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Summary:PROBLEM TO BE SOLVED: To provide a level signal output device that surely prevents malfunction of a vehicle device by preventing the voltage level of a switch source output port from being equal to the voltage level of a switch destination output port. SOLUTION: An ECU(electronic control unit) 1 is provided with a multiplexer 30 provided with a dummy pin 36 in addition to output ports 34 from which a voltage signal is outputted. In the case of selecting an output port 34 to output a voltage signal in this ECU 1, the signal from the output port 34 is once outputted to the dummy pin 36, a voltage level a voltage signal given to the multiplexer 30 is changed for that time and then the output is switched from the dummy pin 36 to the output port 34, from which the voltage signal is outputted. Thus, in the case of selecting an output port 34 to output the voltage signal, it is prevented that an analog control signal set to each output port 34 is set to a voltage level of other voltage signal in this EC 1.
Bibliography:Application Number: JP19980356372