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 I tried doing a PN Sequence generator using a shift register in Multisim but it didn't work. However this one with d flip flops and xor gate did work somewhat. Here is the circuit.       Components Required:      1. 4D Flip Flops      2. XOR Gate      3. Function Generator for Clock Pulses      4. Oscilloscope       Circuit Design  :        Output:- Red Square waves- Clock Pulses Blue waves- PN sequence Hope this helps!