Engineering Homework Help

I have to create a 5 channel linear TDM-PCM transmitter / receiver in MultiSim. Here are the steps listed

in the assignment –

The first step in implementation of the PCM-TDM receiver is to separate the code words of the various combined signals. For this reason, you need one Serial-to-Parallel converter.

IC 74164 is an 8-bit serial input-parallel output shift register that works opposite to IC 74165. Each separated 8-bit code word at the output of 74164 belongs to one user.

These code words then must be converted to analog samples. This process is done in analog-to-digital converter (DAC). You need to take one generic 8-bit DAC.

The analog samples of different users must be separated in a round robin fashion. 4017 IC or any similar ring counter is a good mean to do so. So, the output of DAC should be connected to all inputs of 5 analog channels, when each switch is closed only for a portion of time as it polls the relevant signal. You may use 4066 or 4016 ICs as analog switch.

The last step is to reconstruct the original signal. You should use low pass filters for this reason.

I have the transmitter completed, i need help putting it all together.

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