This circuit was found in an 80's Electronic Engineering. The power supply must be symmetrical. The no value components are calculated for the desired frequency.
The circuit presented uses Linear Technology Operationals, having been found in a 1993 manual. The...
The circuit presented with low drift is from the Motrorola LinearDatabook of 1990. The circuit...
120 degree lagged signals can be obtained with the simple configuration shown in the figure....