Which of the following circuit type is based upon time or clock pulse?
Sequential circuit type is based upon time or clock pulse.
Combinational circuits and systems produce an output based on input variables only. Sequential circuits use current input variables and previous input variables by storing the information and putting back into the circuit on the next clock (activation) cycle.
For the clocked sequential circuits, the output pulse is the same duration as the clock pulse. A level output refers to an output that changes state at the start of an input pulse or clock pulse and remains in that state until the next input or clock pulse.