| 摘要 |
A UPROM circuit including a pair of UPROM devices arranged to provide a first output level when one of the pair of UPROM devices is programmed and a second output level when the other of the UPROM devices is programmed. The UPROM circuit is programmed by circuitry which selectively provides programming voltages to each of the UPROM devices. Apparatus is provided for sensing the condition of the UPROM devices and feeding back signals for disabling the circuitry providing programming voltages whenever one of the UPROM devices is already programmed.
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