Question

2. A Cardiac Care Unit has 8 patients whose ECG is being monitored. The ECG from each of these 8 patients needs to be observed in a Central Nurse Station Monitor for 20 seconds each. Design the circuit.

Answer 1

Ques:

Ans:

A 8:1 Multiplexer circuit is required. the input should be connected to the ECG machines of each patient. the output is at the nurse station. clock pulse (CLK) should be interval of 20 Sec.

ENABLE Patient #1 Patient #2 Patient #3 Patient #4 Patient #5 Patient #6 Patient #7 Patient #8 8:1 Multiplexer NURSE STATION SELECT SO SELECT S1 SELECT S2 CLK

The select lines (S2 S1 SO) should have the combination as shown in the diagram: si so Output Patient #1 Patient #2 Patient #3 Patient #4 Patient #5 Patient #6 Patient #7 Patient #8