Hello,
We are designing the loop filter of the TRF3765 with the Loop Filter Calculation Tool recommended for TI and we have some doubts about a parameter with we have to set, it is the gain of the VCO.
According with the datasheet of the TR3765 the VCO gain is -65 MHz/V but with this value the components (such capacitors) calculated with this tool are negative.
We don’t know which is our mistake???
Thank you .
Mariana.
Hi,
The VCO gain in the Loop Filter Calculation tool is always a positive number (independent of the VCO Kv polarity).
Please, use 65MHz/V in the specific field.
Regards,
Salvo