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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Zero crossing switch (CB20623E)
This circuit trips when the input signal goes through zero, triggering a direct current load. The...
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VCO CMOS (CB15461E)
CMOS integrated circuits are sensitive to supply voltages in terms of signal propagation time....