Part of the Dual Slope ADC consists of an integrator which integrates the input voltage according to Vin/-Vref . I am using TL071 connected as an inverting integrator.
Quick summary of operation: The output of the integrator charges negatively up to a certain count value when Vin is connected. When the count value is reached, the controller switches to -Vref. This causes the integrator to discharge and hence increasing output voltage (note due to inverting output).
NOW... Instead of the integrator to continue to integrate towards a positive output voltage while -Vref is connected, I want it to stop at zero voltage so that when Vin is connected as input, the integrator will start integrating negatively instantly.
Is this possible by connecting the op-amp supply terminals +Vcc to ground while -Vcc to -ve supply? I tried this but observed clipping in the negative rail too, is it a bad approach? Any other possible solutions?