We found this circuit in the August 1994 issue of Electronics Now magazine. The circuit is based on the now uncommon CMOS 4046. The frequency range is given by C1.
This circuit is both simulation of the operation of a diode bridge and a test circuit for this...
This mixer configuration with the 741 operational amplifier can be found on several other circuits in...
This symmetrical 1.2 to 35 V source was found in a 1994 documentation. The integrated circuits are...