This circuit is part of an oscilloscope project with the PC. Its purpose is to record a peak in a signal that is to be displayed. We found it in the Radio Electronics magazine of February 1990.
In the figure we have a circuit suggested by National Semiconductor, using an operational...
Tone controls for audio applications can also be considered filters that must attenuate certain...
This circuit was found in an Argentine publication from 1973. It uses a common AM coil (50 + 50...