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plz help as speed as possible,high linear gain voltage ampli

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mostafa0020

New Member
hi all
the object is to make a voltage feeding for a CRT deflection plates of an Oscilloscope,i want to put a circuit for voltage amplification in which all the following is obtained:-
1-high gain
2-linear
*noting that NO CURRENT IS REQUIRED TO FLOW OUT FROM THIS AMPLIFIER,JUST VOLTAGE AS A BIASING ELECTRIC FIELD,THE CURRENT IS LESS THAN NEGLIGABLE. :idea: :idea:
i tried to use inverting OP-AMP amplifier,but,in vain :shock: ,plz tell me a certain circut for voltage amplification provided that it have no dc-o/p when no i/p is applied,... :wink:
MOSTAFA.
 

nettron1000

New Member
Although all opamps are primarily voltage gain devices and will fit the specs you mentioned, there will always be some current flow if there is a load attached.

It appears the problem your having is with opamp linearity and stability. Try using a non-inverting opamp configuration, that should improve performance.

Also if im understanding you correctly, doesnt the deflection plate drive circuit require two opamps for beam centering ?
 
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