hello
uploaded a circuit diagram (not complete just shows the front end)
this from my simulator
prototype has been built
problem I have is when range resistor is above 1M ohm and DUT is same value
output voltage should be the same but it is not due opamp input capacitance
I have...
hello
using 2 non inverting opamp buffers (AD8620) to read the voltage across 2 resistors connected in series
1 reference resistor and 1 resistor DUT via reed relays (reed relays are switched in turn to read each resistor)
Output of opamp buffers feed an instrument amplifier AD8211
The...