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| Q. |
Which of the following sequential circuit doesn’t need a clock signal? |
| A. | flip flop |
| B. | asynchronous counter |
| C. | shift register |
| D. | latch |
| Answer» D. latch | |
| Explanation: latch has an enable input, but no clock signal. all other circuits including asynchronous counter needs a clock signal. it is called asynchronous because every flip flop doesn’t have same clock signal. | |
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