R
[email protected]
- Jan 1, 1970
- 0
Hi,
In 10 years of RF experience, i've never had to use frequency
multipliers until now. (Dividers for PLLs, most certainly, yes!)
So we all know that the phase noise at each offset
(dBc/Hz @ offset in Hz) should increase by 20*log(N),
or 6 dB for a frequency doubler.
But i'd like an explanation of how they got this?
Also, if you put two tones into a frequency doubler,
like 100 MHz and 110 MHz, will you get out 200 MHz
and 220 MHz, plus harmonics? Or will you get 200MHz
and 210 MHz, plus intermod products from the non-
linearity of the diode that they often use in these?
Thanks for the help!
Slick
In 10 years of RF experience, i've never had to use frequency
multipliers until now. (Dividers for PLLs, most certainly, yes!)
So we all know that the phase noise at each offset
(dBc/Hz @ offset in Hz) should increase by 20*log(N),
or 6 dB for a frequency doubler.
But i'd like an explanation of how they got this?
Also, if you put two tones into a frequency doubler,
like 100 MHz and 110 MHz, will you get out 200 MHz
and 220 MHz, plus harmonics? Or will you get 200MHz
and 210 MHz, plus intermod products from the non-
linearity of the diode that they often use in these?
Thanks for the help!
Slick