Buffer with MOSFET (CB26318E)

This boost amplifier was found in a Popular Electroniics from the 90s. The circuit operates up to 20 MHz depending on the coils used.

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100 Hz Notch Filter (CB14844E)
This filter that can use any operational was found in a French documentation from 1982. The power...
Zener Regulated Transistor Power Supply (CB13064E)
In the figure we present an extremely simple circuit of a voltage source regulated by a zener...
Protected Power Supply (CB4667E)
The maximum current of this power supply is 2 A and the output voltage can be set between 6 and 24 V. The...