The gain of this amplifier is given by the components indicated in the formulas next to the diagram. The power supply must be symmetrical and equivalent operational amplifiers can be used.
The scratching noise is quite unpleasant for those who pass the sound of vinyl records to other...
This circuit for common analog telephones was found in March 1982 Radio Electronics magazine. It...
In the figure we have an RF amplifier for tunnel diode. The frequency range will depend on the...