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.
Texas Instruments ESD122 Electrostatic Discharge Diodes (ESD) can be ordered from Mouser...
We find this circuit in a 1980s documentation. The circuit is for SSB modulation and the...
We found this circuit in an old American manual. The formulas allow the gain to be calculated as a...