Integrator with JFET (CB6229E)

This circuit was found in an 80s National Semiconductor documentation. The configuration holds true for modern JFETs.

AM or FM Signal Clipper (CB4183E)
This clipper or limiter circuit limits the amplitude of AM or FM audio signals. The diodes are...
Driver Darlington (CB8957E)
This circuit was obtained in a 1960 documentation of General Electric. It is applied in the...
Two Transistors Amplifier CIR643S (CB12200E)
The transistors of this amplifier for headphones with 8 to 200-ohm impedance can be BC548 or...