| 摘要 |
A checking circuit for checking the normal operation of a sensor comprising a sensor, a controller for switching the checking circuit operation between an open check mode and a sensing mode. The circuit for effecting the open check mode is responsive to a first logical output signal from the controller. The circuit for effecting the sensing mode is responsive to a second logical output signal from the controller, however, the sensing is only accomplished after successful completion of the open check mode.
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