TTL vs square waves generation

[jigsawfallin]

I'm trying to generate a 5V TTL signal, and I have a function generator that can generate square waves. My question is can I generate a 2.5Vpp square wave and offset it by +2.5V to make it work like a TTL wavefom?

Thanks

 

[betwixt]

You don't need to offset it. TTL levels are zero and 5V so what you need to generate is a 5V signal from your function generator.

Brian.

 

[spudboy488]

As Brian said, TTL levels go from 0 to 5V. Most function generators (at least all the ones I've used) do require the offset as their outputs are usually AC. Check the output of your generator before connecting it to your circuit. If you are clocking at a relatively slow rate, you can always use a single diode to "rectify" the output so you only get the positive side of the waveform.

 

[tpetar]

Why to use function generator to generate TTL signals, you can use transistor for this.

Additional see this
Sine Wave To TTL Converter
https://free-circuitdiagrams.blogspot.com/2011/05/sine-wave-to-ttl-converter.html