1. What does the ring counter in the HDL keypad application do when a key is pressed?





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MCQ->What does the ring counter in the HDL keypad application do when a key is pressed?....
MCQ->Refer to the keyboard encoder in figure (a). Sometimes when the 5 key is pressed, the system attached to the keypad does not respond. The 5 input on the 74147 is monitored with a digital storage scope while repeatedly pressing the 5 key, and the waveform in figure (b) is obtained; the P above the trace indicates the points at which the technician pressed the key. What is most likely wrong with the circuit?

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MCQ->In the keypad HDL encoder, after releasing a key the ring counter resumes its counting sequence.....
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