Indicated for discriminators adjustment in FM and VHF receivers, this circuit was found in a 90s 73 magazine for radio amateurs. The operational amplifier can be a general-purpose type.
This circuit already incorporates the amplification stage, since the oscillator is of the type of...
In the figure we have the way to obtain the Exclusive-OR function with 1 transistor. The circuit...
In this circuit of Texas Instruments an incandescent lamp is used as a light source, and lenses are...