Symmetric power supply for operationals (CB22161E)

Found in an English documentation from 1989, this font uses current components. Rectifier bridges can be replaced by common diode bridges.

Vswr protection circuit (CB20375E)
This protection circuit for standing waves was found in a manual of high frequency circuits and...
High impedance stage (CB20564E)
This high input impedance amplifier stage was found in a 1963 documentation. The transistor...
Photodiode Amplifier (CB4846E)
This setting appears multiple times on the site from different sources. This is from a 2000 manual...