schomandl: Old types of frequency synthesizers
A guest has sent us a contact form with the following question:
Do you know where to find information on an old type of frequency synthesizers. These were using multiple crystal oscillators, like very old CBs had, to achieve the different channels. Then I think they where using multiple bandpass filters, one for each oscillator, to filter out the signal. They were used on very low phase noise systems but they where quite expensive.
I do not even know what is the name of this technique?
A friend told me that it is like this one but I am not sure
Do you have any information and/or schematics on this?
Thanks in advance
Hopefully a member can answer him in the forum.
Maybe we also find more such models ...