# Confusion with Wheatstone bridge resistor terminology in datasheets

An off-shelf instrumentation amplifier manual has the following indication for Rb:

And this force-transducer gives the following resistance parameter:

I guess Rb is each single resistor value of the Wheatstone bridge.

But what could be meant by input resistance and output resistance regarding the force-transducer?

So, from the point of view of the battery, it sees $$\R_G+R_C\$$. That's the input resistance. The output resistance remains unchanged at $$\R_G\$$.
• Well, if Vcc was open circuit the output Z would be ($R_G+R_G$)||($R_G+R_G$) = $R_G$. And, if you think about it, when sorting Vcc out it's just the same. Apr 2, 2020 at 13:10