This circuit is from a 1968 Motorola power circuit manual. The circuit uses transistors of the time. The passing band is 45 Hz to 100 kHz.
The integrated circuit used in this 90's circuit is not common today, but the configuration can be...
We found this circuit in a 1976 publication for radio amateurs. It was originally intended for use in...
We found this high input impedance, low output impedance amplification stage in the October 1993...