magnetic head signal

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cosmin800

Joined Aug 29, 2005
1
I am tring to work with an ADC and i have one problem, the adc cannot see the negative alternance of the signal from the head, how can i shift the signal so all the wave from the head to be on the positive edge?
 

hgmjr

Joined Jan 28, 2005
9,029
Originally posted by cosmin800@Aug 29 2005, 10:10 AM
I am tring to work with an ADC and i have one problem, the adc cannot see the negative alternance of the signal from the head, how can i shift the signal so all the wave from the head to be on the positive edge?
[post=10000]Quoted post[/post]​
Hi cosmin800,

I think what you are going to need is a differential amplifier that is powered from your positive supply. That way your read-head will be connected up as a floating signal source.

Can you post your present read-head interface circuit here?

hgmjr
 

Gorgon

Joined Aug 14, 2005
113
Originally posted by cosmin800@Aug 29 2005, 06:10 PM
I am tring to work with an ADC and i have one problem, the adc cannot see the negative alternance of the signal from the head, how can i shift the signal so all the wave from the head to be on the positive edge?
[post=10000]Quoted post[/post]​
You could be lucky if the ADC in question can take a negative -ref input, but the best is for you to post the schematic here.

TOK ;)
 
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