Sample op-amp circuit for exciting sensor

[dayal]

hai everyone,

I need some idea or sample circuit for my project, i want to excite the (sensor(resistance type) , for this i drawn the circuit (using 555 ic ).

And i want implement this circuit into voltage compartor using op-amp. in the non-inverting terminal i applied constant excitation voltage(5v square wave) and inverting terminal connecting sensor(resistance type), due to the resistance variation, i would like to get corresponding output voltage in the ouput.

and can anyone explain what is mean by virtual ground in op-amp?
so can anyone give some example circuit for my applicaiton.

Thanks
dayal

 

[mic1984]

op-amp circuit

I don't know you mean very clearly,but I think this circuit wlii be useful. you can try this one.

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[laststep]

op-amp circuit

i think you can take this circuit as the example
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For the virtual group try look at this wiki page
https://en.wikipedia.org/wiki/Virtual_ground
explain very detail about it.

 

[drming]

Re: op-amp circuit

You could find your answers here:

Op Amps for Everyone by Ron Manchini


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