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Design >> Analog Design >> Current-input current-output integrator
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Message started by rajeee1000 on Feb 22^nd, 2012, 9:58pm

Title: Current-input current-output integrator
Post by rajeee1000 on Feb 22^nd, 2012, 9:58pm

Hi!

Does somebody have an idea or information of the existing techniques to build a current-input current-output integrating function (i_out(t)=integ(i_in(t)dt), limits: -inf, t)? Please help; thanks.

Best regards,
Rajesh

Title: Re: Current-input current-output integrator
Post by rfidea on Feb 23^rd, 2012, 1:47pm

I think this does what you want.

Title: Re: Current-input current-output integrator
Post by loose-electron on Feb 23^rd, 2012, 7:32pm

1. put a current into a capacitor.
2. voltage on cap is proportional to the integral of the current.
3. Use an op amp in a V to I converter configuration
(see any op amp book)

that what you are looking for?

Title: Re: Current-input current-output integrator
Post by raja.cedt on Feb 24^th, 2012, 2:26am

hello,
as rf idea and loose electron said, just dump some current into cap and convert that voltage into voltage by V2I converter. In fact all integrators are based current input, but we are interested to integrate voltage so we used to keep resister to converter voltage into current.

Thanks,
Raj.