This amplifier is from Motorola's 1990 Linear Databook. The circuit can be used with operating amplifiers with the same characteristics and the power supply must be symmetrical.
This active tone control circuit was found in American documentation from the 90's. The transistor can...
This circuit was obtained in an old European documentation and modern transistors and even...
We found this circuit in an American publication from the 90s. The power must be 2 V more than the...