We found this precision circuit in a manual from the 80's. The operational amplifier is of a common type at the time, and equivalents can be tested. Transistors are general purpose types.
This circuit was found in a Popular Electronics from the 80's. The circuit can be applied to any...
This 100 Hz filter was found in the August 1993 issue of Electronics Now. The components can be...
This receiver receives signals from the VHF band with earpiece or application in a power stage. The...