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1. |
A 4-bit synchronous counter has flip-flops having propagation delay of 50 ns each and AND gates having propagation delay of 20 ns each. The maximum frequency of clock pulses can be |
A. | 20 MHz |
B. | 50 MHz |
C. | 14.3 MHz |
D. | 5 MHz |
Answer» D. 5 MHz | |