- A Logic Circuit Simulation Library in C++

(libLCS Example) Using feedback around NOT gate

In this example, we will use feedback around a NOT gate which has a propogation delay. This results in a pulse at the output of the NOT gate with time period twice the propogation delay.

#include <lcs/not.h>
#include <lcs/simul.h>
#include <lcs/changeMonitor.h>

using namespace lcs;

int main()
{
    Bus<> b(0);
    Not<5> notGate(b, b);
        
    ChangeMonitor<> s1m(b, "Output", DUMP_ON);
        
    Simulation::setStopTime(50);
    Simulation::start();
        
    return 0;
}

The following is the output when the above program is compiled and run.

At time: 5,     Output: 1
At time: 10,    Output: 0
At time: 15,    Output: 1
At time: 20,    Output: 0
At time: 25,    Output: 1
At time: 30,    Output: 0
At time: 35,    Output: 1
At time: 40,    Output: 0
At time: 45,    Output: 1
At time: 50,    Output: 0

Below is the screenshot of the gtkwave plot of the generated VCD file.