We found this circuit in a 1973 publication. The circuit lets frequencies below 480 kHz pass through with an output impedance of 1k. The circuit can be implemented with current operational.
This protection circuit for symmetrical 28 V power sources was found in a 1968 EEE documentation. The...
We found this circuit in a 1986 documentation. Its purpose is to power a set of light bulbs (or...
We found this circuit in a component manual from the 80s. R1 has values between 1k and 10k. R1 has...