AnsweredAssumed Answered

UHF RFID VCO problems

Question asked by Karsten Pilested on Feb 9, 2017
Latest reply on Dec 13, 2017 by Bart Herse

In the UHF RFID reader ST25RU3993 I am having a little bit of a problem with startup of the VCO.

In VCO control register 11h I can change the internal oscillator bias current. What do I gain by changing it from the default ?
I can also manually select the VCO range segment, I will like to do that to speed up the change of frequency, but how do I figure out the best VCO segment, is it possible to calculate it ?
In section 2.3.1 in the data sheet it says that: " Details on using the 1800MHz VCO are described in a dedicated application note".
Where can I find this app. note?

Outcomes