This small signal amplifier circuit was found in Motorola's 1969 documentation. The FET and the transistor can be of any type and is battery powered since the consumption is very low.
This circuit adds a beep to turn on with car flashers that do not have this feature. A 47 ohm to...
This circuit that can amplify signals from 0 to 30 MHz was found in a 90s Popular Electronics....
We found this solid-state relay circuit that can function as a shield in a Radio Electronics...