Found in an Electronics News from 1970, this circuit supplies a current of up to 1 A. The integrated circuit is from the era and must be mounted on a heat sink.
The cut-off frequency of the filter shown in the figure can be adjusted to values between...
This circuit was found in a Popular Electronics from the 90s. The components used are all common...
This circuit uses a dual floodgate MOSFET not very easy to obtain today. Its handling is very...