Hi all,
Please, help me with a circuit(at transistor level) which should convert a signal with logical "0"=0V and logical "1"=1.2V(or 0.9V) to a signal with logical "0">=0.3V (but not greater than 0.7V) and logical "1"=1.2V. I have two types of supplies 0.9V and 1.2V, any of which can be used or both.
Thanks in advance.

 

Re-phrasing your request:

Please help me with a transistorized circuit.
Convert an input signal:

logical "0"=0V
logical "1"= 0.9v to 1.2V

Desired output:
logical "0" = 0.3V to 0.7V
logical "1"=1.2V.

I have two types of supplies 0.9V and 1.2V, either/both can be used.

Is this a homework assignment, by any chance?

 

Thanks for re-phrasing. Now it is much clearer. I hope someone will provide the solution.

 

What have you done so far? Where are you getting stuck?

 

So far I have nothing. I need the conceptual design itself, than I will be able to give appropriate values to devices (sizing etc.).

 

Is this an assignment given to you by a teacher/instructor/professor?

 

No, I just need it for a circuit I am building. Why are you asking

 

I'm asking because it rather sounded like such a project.

See the attached; it's merely a simulation. Your mileage with actual components may vary.

The incoming sawtooth wave is 20kHz. At low speeds, the switching occurs at 0.9v; but at 20kHz you can see the level is a bit off. It doesn't work at all at 100kHz.

 

Why are you asking

We want to know where to file the thread.

Where is the signal you want to boost or adapt coming from? A sensor of some kind?

Do you need the output linear over the range, or just 2 outputs 0v and 1.2v

 

Thanks SGTWookie,
That's what I need.