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-ve feedback in wheatstone bridge

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electronics_kumar

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purpose of having a negative feedback in wheatstone bridge is ...?it is also having positive feedback...which will dominate??
 

Naveed Alam

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if u draw fig. it will help to answer...
but
2 diodes are for +ve cycle of input ac voltage
and 2 diodes are for -ve cycle of input ac voltage..
no pair dominates....

is this is the answer to ur question??

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electronics_kumar

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okk.purpose of having a negative feedback is for creating oscillation..ok mission is achieved ...then what is the purpose of having extra positive feedback...?
 

Naveed Alam

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kumaar, if u attach the figure which show extra +ve feed-back, then it will help to answer..


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electronics_kumar

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you can refer any wheatstone circuit diagram...all will certainly possess both feedback....
 

Naveed Alam

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ok,,,
-ve pairs.. rectify the -ve pulses of the ac.. so, the -ve pulses appear above the ground level as +ve pulses.
+ve pairs.. just pass the +ve pulses of the ac
..
-ve pairs single handedly, don't create oscillations....

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