This filter was found in an 80's English publication. However, it can be implemented with modern operating systems. The circuit can tune frequencies in a range from 10,000 to 1.
This circuit is from the 1990 Motorola Data Databook. The circuit can be implemented with...
The circuit presented emulates an OR gate with the LM3900, operational transconductance amplifier....
This circuit is interleaved with the source of a portable AM or FM radio previously tuned to a...