HMC439 use as frequency Comaprison

Hello,

Yes you can try using the HMC439 like this, but it was never intended to be used in this way. It was only intended to be used in PLL applications. There may be some hysteresis when using the HMC439 like this. Using a mixer may be a better option
RE: [HMC3716]

Regards,

Alex

Hello,

Yes you can try using the HMC439 like this, but it was never intended to be used in this way. It was only intended to be used in PLL applications. There may be some hysteresis when using the HMC439 like this. Using a mixer may be a better option
RE: [HMC3716]

Regards,

Alex

Thank you Aandrews.

The output of mixer will be an IF frequency and i want a DC Voltage so i think mixer cannot be used.

One more thing i want to ask is Lets say my Reference is 100 MHz and Input Frequency varies from 130 to 140 MHz. Will i be able to detect error voltage change as input frequency changes with 1MHz step

Or can you suggest some mixer which generates DC Voltage output based on the difference between RF and LO Frequency?

How about something like the AD8302?

 FAQ: AD8302 Gain/Phase Detector: Operation as a Frequency Discriminator 

Dear Aandrews, AD8032 can measure the phase difference between +- 90degrees. How can i convert the my frequency difference into phase difference?

Lets say my Reference is 100MHz and my input frequency is 130MHz. Difference is 30MHz so how many degrees will correspond to 30MHz difference?

I think this device measures the phase difference between two same frequencies.

However in my case, the frequencies are different.

Dear Andrews,

Can i simulate hysteresis effect using HMC439 in open loop with the help of any transient simulator?