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AD5933-Slide30

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.

PTM Published on: 2007-09-17