The circuit has the traditional configuration that can be found elsewhere on this site. This is from 80s documentation and the LM350 can be used for higher current.
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...