![]() The app note suggests to calculate the impedance of the traces (from pad to pad) for the balun part. 20 + j0 is the Thevenin equivalent impedance (Zout). It marks the trace to take the impedance of the trace in calculation. "It ignores the dc blocking cap as the values are large". ![]() The IC's (CC2500) datasheet defines the optimum load at RF_P and RF_N as 80+j74 ohm.įrom figure 6 on page 7, it shows the differential circuit, and the below figure (figure 7) shows the single part where the impedance is divided by 2. I would appreciate if someone could tell me what/where am I doing wrong?īlue part is the DC blocking cap, C10-L1 and 元-C11 are Balun, the grey part is PI network. ![]() I am having problem to verify what an app note ( AN068) explains to calculate Balun values.
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