1.

In order to check the CLR function of a counter ____________(a) Apply the active level to the CLR input and check all of the Q outputs to see if they are all in their reset state(b) Ground the CLR input and check to be sure that all of the Q outputs are LOW(c) Connect the CLR input to Vcc and check to see if all of the Q outputs are HIGH(d) Connect the CLR to its correct active level while clocking the counter; check to make sure that all of the Q outputs are togglingThe question was asked at a job interview.Query is from Asynchronous Down Counter topic in section Counters of Digital Circuits

Answer»

The correct choice is (a) Apply the active LEVEL to the CLR input and check all of the Q outputs to see if they are all in their reset STATE

To explain: CLR stands for CLEARING or resetting all states of flip-flop. In order to check the CLR function of a counter, apply the active level to the CLR input and check all of the Q outputs to see if they are all in their reset state.



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