Hi,

i have a signal in with positve and negative pulse, how to seperate them into 2 waveforms, one with positve only and other one with negative


Thanks

 

This type of signal is common in some communication/modulation systems. If the frequency is pretty low and the signal is strong then a few signal diodes would do the job. But if you need to operate at high frequency or worry about loading the signal source then you need to use opamps to separate the pulses.

 

Originally posted by n9352527@Nov 21 2005, 06:27 AM
This type of signal is common in some communication/modulation systems. If the frequency is pretty low and the signal is strong then a few signal diodes would do the job. But if you need to operate at high frequency or worry about loading the signal source then you need to use opamps to separate the pulses.

[post=11798]Quoted post[/post]​

Thanks for replying. I'm really weak on analog thinggy, Could you please give more detail on it.

Thanks again

 

Originally posted by thong@Nov 21 2005, 04:40 PM
Thanks for replying. I'm really weak on analog thinggy, Could you please give more detail on it.

Thanks again

[post=11812]Quoted post[/post]​

A simple two diodes circuit is attached.

 

Originally posted by n9352527@Nov 21 2005, 06:27 AM
This type of signal is common in some communication/modulation systems. If the frequency is pretty low and the signal is strong then a few signal diodes would do the job. But if you need to operate at high frequency or worry about loading the signal source then you need to use opamps to separate the pulses.

[post=11798]Quoted post[/post]​

OpAmps are terrible for comms I thought. I remember seeing their low roll of freq due to their internal cap. Typicall 20-40Khz.

Isn't basic comm stuff in the Mhz range?