Employing the XR2206 IC, this circuit was found in the May 1977 issue of Radio Electronics magazine. The formula next to the diagram gives the component values as a function of frequency.
Found in a 90’s American publication, this circuit has a voltage gain close to 1, as shown in the...
Using a pair of 741 op amps, this 90 s Radio Electronics circuit works with the previous one. The...
This circuit is from a 1966 Motorola Field Effect Transistors Manual. The circuit makes use of...