SIGNAL DETECTION CIRCUIT AND HEATING DEVICE
PROBLEM TO BE SOLVED: To provide a signal detection circuit that can detect a signal input line being abnormally connected without increasing the number of components, is low cost, and meets the demand for size reduction.SOLUTION: In the signal detection circuit configured to input a detection signa...
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| creator | HIRANO TOMOHIRO HASEGAWA TOSHIAKI OSHIO TADAHIKO |
| description | PROBLEM TO BE SOLVED: To provide a signal detection circuit that can detect a signal input line being abnormally connected without increasing the number of components, is low cost, and meets the demand for size reduction.SOLUTION: In the signal detection circuit configured to input a detection signal of a thermistor TH to an A/D input port 11 of a microcomputer 1, a signal input line 2 to the A/D input port 11 is branched and connected to an input/output port 13 of the microcomputer 1. For diagnosis of a connection of the signal input line 2, the input/output port 13 is placed in an Hi-level output state, and it is determined from a current input value of the A/D input port 11 whether the signal input line 2 is abnormally connected. When the detection signal of the thermistor TH is read, the input/output port 13 is set as an input port. |
| format | Patent |
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For diagnosis of a connection of the signal input line 2, the input/output port 13 is placed in an Hi-level output state, and it is determined from a current input value of the A/D input port 11 whether the signal input line 2 is abnormally connected. 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For diagnosis of a connection of the signal input line 2, the input/output port 13 is placed in an Hi-level output state, and it is determined from a current input value of the A/D input port 11 whether the signal input line 2 is abnormally connected. 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For diagnosis of a connection of the signal input line 2, the input/output port 13 is placed in an Hi-level output state, and it is determined from a current input value of the A/D input port 11 whether the signal input line 2 is abnormally connected. When the detection signal of the thermistor TH is read, the input/output port 13 is set as an input port.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE PHYSICS TESTING THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR |
| title | SIGNAL DETECTION CIRCUIT AND HEATING DEVICE |
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