In the figure we have the basic configuration of an operational amplifier for audio signals. The circuit is from a Radio Electronics from the 90s. The power supply must be symmetrical.
We found this precise crystal oscillator for the 144 MHz band, depending on the crystal used. The...
We found this circuit in a 1981 publication. We applied an audio signal, for example, a music...
In the figure we have a simple circuit to measure the current in an electronic device and thus...