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 circuit tests rectifier diodes with currents from 200 mA to 450 mA, thus serving to test...
This circuit generates a 1296 MHz signal from 100 or 1,000 kHz crystals. We found it in an...
This preamplifier with RIAA equalization was obtained in a documentation from the 1980s. The...