Hello all,

Hope someone can give me some clues as to why my simulation does not work (SIMETRIX schematic attached with the truth table). I used SIMETRIX to test my design and I find my device LS153 not responsive=no outputs are generated. What is worse, the device does not give any outputs at all, SIMETRIX does not appear to accept my trying to place 'digital probes' on the output pins of the device (during many days of trying).
I researched the help files but no luck so far. I can probe any input line without any issues. I used waveform generators and have graphs for my inputs - all good. But the device itself appears not to function. If anyone has any ideas what am I missing, kindly share them with me.
Thank you very much,
MO

 

Welcome to AAC!

Most would prefer that you not post .docx files. I understand that they're not supposed to contain macros, but some are hesitant to open them.

Edited version of your schematic:

Can your simulator show you the input and output waveforms?

Not sure what you're trying to convey here:

 

Hello,
As this project is part of my course work, the F1 and F2 outputs shall be true for the conditions given. I tabulated them in the table shaded blueish. Then with the use of waveform generators I configured the inputs so that each condition could be simulated as the waveforms are going through their pulses and cycles. SIMETRIX is graphing each input condition without any issues; what is troubling is the inaction of the LS153 device.
Hope this makes sense, I am new to the SIMETRIX software so very likely am missing something obvious...