Multiple Aperture Window Discriminator

Thread Starter

Mazaag

Joined Oct 23, 2004
255
Hi guys,

I'm looking at the MAWD on the 3rd page of this link : http://www.phy-astr.gsu.edu/nelson/AN-31.pdf

could somoene explain how this works ?

I understand that they are a bunch of comparators, but can someone explain the FETs ?

hers's what i understand,

once the first op-amp (V4 and Vin) goes HIGH ( ie: Vin > V4 ) , the fet is conducting, therefore, Vin appears at the positive terminal beign compared to V3 .... doesn't that mean that the output from the second opamp goes HIGH when the first condition is satisfied ( Vin > V4 ) AND Vin > V3 ?

Thanks guys


My apologizes this should have been posted in the General Electronics section
 

beenthere

Joined Apr 20, 2004
15,819
If the compared voltages are each higher as you go down the chain, then the comparators work. If V4 is 1 volt, V3 is 2 and V2 is 3, presenting 2.5 volts at Vin will result in the top two comparators high and the bottom 2 low, meaning the input is between 2 and 3 volts.
 
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