how to convert voltage level of PPM signal.. see CRO pic

Hello,

I wish to convert the following ppm signal (+.3V to -1.2V at about 500hz) to 0V to 5V levels.

http://www.flickr.com/photos/114317787@N06/11929829873/

How can I do this.
Thanks.

 

[yaputya]

<bonga77@gmail.com> wrote ......

Hello,

I wish to convert the following ppm signal (+.3V to -1.2V at about 500hz) to 0V to 5V levels.

http://www.flickr.com/photos/114317787@N06/11929829873/

How can I do this.
Thanks.

You must be a software dude

Did you have the osc. input DC-coupled? It looks like an AC-coupled signal.
In any case, you can clamp the negative excursion to 0V with a simple circuit.
http://en.wikipedia.org/wiki/Clamper_%28electronics%29
Then just use a NPN transistor to level-shift to 0-5V.

 

Looking at my notes,I did have it ac coupled. Sorry.
I'll check the signal tonight dc coupled, get a pic, and post back when I know what I want.

Thanks

 

I've given a day to it and have decided I'm not capable of this.

I was trying to convert a ppm signal coming out of my expensive rc transmitter to something that was usable with other tx gear.

I think I'll just buy a cheap transmitter .

Thanks Yaputya.

Gavin.