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Digital Electronics

Q1: What will be the maximum conversion time in 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000).

A 108 sec

B 63 μ sec

C 40 sec

D 80 μ sec

ANS:A - 108 sec

for t2 maximum all bits should be 111111 = (63)10 Maximum conversion time = 63 + 40 = 103 μ sec and it takes 5 μ sec to transfer N2 to the O/P register. tcmax = 108 μ sec.



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