I'm looking for not only a inverting but also a non-inverting integrator circuit in which the gain remain constant from a few Hz and up to around a kHz, rather than gain dropping as freq goes up, but not only that, it also need to keep the output voltage constant regardless of input voltage.
Anyone know of anything ? I'd prefer if it used as few components as possible as i will have three of each these, one that integrates on the positive side of zero and one that integates on the negative side of zero.
I am trying to replicate the TI "instaspin" sensorless bldc drive using analog parts for the bemf stuff and some 4000 series logic to make the six step trapezoidal drive.
Why ? Just for fun.