This circuit was found in a 1967 US documentation. The circuit applies to modern general purpose transistors. The circuit has no offset. The power supply must be symmetrical.
This mixer with amplification stage has two inputs, but it can be expanded. The input impedance is high...
This circuit was found in an American documentation from the 90s. It consists of a variable with a...
We found this circuit in a 1977 Radio Handbook. The JFET can be of any type and the adj can have...