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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Switch Amplifier (CB21820E)
A circuit for controlling the temperature of a heating element was found in a Mullard transistor manual...
Balanced Microphone Preamplifier I (CB4943E)
This circuit was obtained from an American publication of the 80's. The integrated circuit is of the...
Monostable Using the 4047 (I) (CB134E)
The 4047 is a monostable/astable CMOS multivibrator. The basic con- figuration is triggered by the...