This is yet another balanced modulator circuit for SSB transmission. This two-diode circuit was found in a 1980s documentation. The diodes are commonly used.
This simple multimeter takes advantage of the low cost common galvanometer of 200 uA or 1 mA and...
In the figure we have the way to use an operational amplifier on a higher voltage source than it...
This crystal-controlled oscillator was obtained from an American 1980s documentation. The circuit...