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Old 23rd May 2021, 7:37 am   #1
mole42uk
Nonode
 
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Join Date: Aug 2010
Location: Bristol, UK
Posts: 2,311
Default 1MHz output impedance query?

Hi,

I am breadboarding my latest GPSDO using a ublox NEO-7 GPS receiver. I have a very stable phase lock using a 100MHz output from the receiver and a divided 10MHz OCXO clock.

I have used the attached circuit to ptovide a 50Ω output, and I'm experimenting with the square-to-sine converter also shown. What I don't know how to calculate is the output impedance which I would like to be 50Ω.

Would anyone help please?
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