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 circuit was obtained from an English magazine from 1977. The magazine no longer exists, but...
Found in a 90s Radio Electronics this circuit requires precision resistors in the dividing...
This circuit consists of a pre-amplifier for high impedance microphones. The circuit uses a FET...