Hi everyone, I have some questions about the design of loop filter as shown in the page 9 of the HMC3716 datasheet:
- What's the output of NU & ND? The phase error between RF and LO is represented by the voltage on NU and ND? For example, if there is a fixed phase error between RF and LO(with same frequence), what might be the voltage on NU and ND? And the 2Vpp swing of NU ND is due to the voltage drop accorss 200 ohm resistor ? 10mA * 200 = 2V .