This circuit doubles the frequency of signals from 10 to 50 MHz. We found it in a 1969 Electronic Design. The components are from the period.
Indicated for applications with a PC, this circuit was found in an English documentation from...
I found this circuit in a Popular Electronics from 1992. The circuit shows how we can use two...
I found this circuit in a Popular Electronics from November 1999. The magazine is no longer...