Hi Jim,
I still have some doubts,please help me confirm this:
1, In the section 9.2.1.1,as long as i choose the frequency of input signal,i can select the corresponding RC value and calculate the ZIN
2,At this step i’m not sure whether to use the R&C value to calculating by theR&C off-chip and ZIN
For example,if the requirement of design is 100Ohm input and the frequency is 100MHz,then we can confirm the RIN is 900Ohm and CIN is4.75pF,so the ZIN equal to RIN || CIN and the value is 244Ohm。
Therefore in order to get the 100Ohm input impedance the R value is 169Ohm(100Ohm = 169Ohm || 244Ohm),is that correct?