However, it is also important to note that the corresponding DC bias voltage will also scale with the choice of output excitation voltage. Also, the receive side is always hard biased at VDD/2. The problem is that the shift in DC bias may cause the internal I-V on the receive side to saturate based on the RFB/Z value in question. If the ratio is sizeable, results outside the rails of the I-V amplifier are possible.

