This high impedance step suggested by an English publication can operate up to 1 MHz with 1 V rms output. Input impedance is 1 M ohm.
This circuit was found in a 1968’s General Electric documentation. The circuit has a control range of...
Found in an 70s Electronic Engineering, this circuit divides the pulse frequency by non-integer...
The open output voltage on this circuit is approximately three times the peak value of the input...