# Materials for DTL, TTL circuit analysis

Hi fellow forum-ers :),
I have a test in about two weeks where i am gonna be given a dtl or ttl circuit which i have to analyse and calculate its function. The professor said that the circuit given to us will always be a useful and existing one meaning he's gonna give us some NAND, NOR or similar circuit without specifying which circuit it is and we have to analyse the circuit both qualitatively with a table of inputs - transistor states - outputs to conclude which it is and quantitatively by making calculations and drawing a graph of the circuit with all the points of change drawn on the graphic.
So far i have only found a youtube video by ntelhrd
which deals with this and was wondering if any of you guys can recommend any extra material (preferably in video form if exists) to cover this in more clarity than i got from my lectures?

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Averagesupernova
Gold Member
So have you not covered any of this material in a lecture or classroom?

So have you not covered any of this material in a lecture or classroom?
We have, but we only just started and i wanted to learn ahead by studying from some other source. It will be covered in the lectures to come but i don't really like the way they explain it.

berkeman
Mentor
We have, but we only just started and i wanted to learn ahead by studying from some other source. It will be covered in the lectures to come but i don't really like the way they explain it.
(I'm really old and even I never learned or used DTL logic, so I'm not of any help on that part)

I would start with a Google Images search of TTL logic, and be sure that you can figure out each of the dozens and dozens of images that show up. If any confuse you, save them and talk them through with your instructor or classmates. As for guided tutorials, I'd just keep using Google to try to find more of them.

anorlunda
Averagesupernova
Gold Member
I will give you a start in a few simple lines:
-
OR: Any HIGH on input gives a HIGH on the output.
AND: Any LOW gives a LOW.
NOR: Any HIGH gives a LOW.
NAND: Any LOW gives a HIGH.

dlgoff and jim hardy
jim hardy
Gold Member
2019 Award
Dearly Missed
Does the term "Truth Table" come to mind? It's a basic but powerful tool .

dlgoff
dlgoff
Gold Member
(I'm really old and even I never learned or used DTL logic, so I'm not of any help on that part)
[OFF TOPIC]I must be really old then, as my old ham mentor introduced me to RTL when it first became available in IC packages.[/END OFF TOPIC]

jim hardy
CWatters