Protected regulator (CB8708E)

This 1965 Electronic Design circuit has short-circuit protection and is suitable for 20 V sources. Transistors are types of the time.

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High Input Impedance LM3900 Amplifier (CB14183E)
The figure below shows an AC transconductance amplifier with the National Semiconductor LM3900. The...
Guitar Fuzz (CB26213E)
This common circuit using operational amplifiers was found in the 1993 issue of Radio Electronics Special...
Voltage Switch with Diac (CB13362E)
This circuit provides a voltage at the output only when the input voltage exceeds a value that...