Self-diagnostic circuit of I/O circuit system

Details Self-diagnostic circuit of I/O circuit system Self-diagnostic circuit of I/O circuit system

2006-01-10

2006-01-10

Smith, Matthew (Department: 2825)

Computer-aided design and analysis of circuits and semiconductor

Nanotechnology related integrated circuit design

C716S030000

Reexamination Certificate

active

06986111

ABSTRACT:
An I/O circuit system incorporated in the main controller of a semiconductor manufacturing apparatus or the like includes a self-diagnostic circuit in which tie switches are interposed between output channels which output control signals in order to drive and control apparatus-side driving portions constructed on an I/O board, and input channels which input return signals and sensor signals in response to the control signals, and self-diagnostic switches which disconnect power supply lines to the apparatus-side driving portions are arranged. To perform self-diagnosis upon generation of a fault or the like, the self-diagnostic switches are in a nonconductive state, and the tie switches are in a conductive state to electrically disconnect the apparatus. If a return signal corresponding to a self-diagnostic signal output from the main controller is returned, no electrical fault is determined to occur. If no return signal is returned, an electrical fault is determined to have occurred.

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patent: 11-143790 (1999-05-01), None

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