This filter was found in Texas Instruments documentation from the 1980s. The circuit uses a common operational amplifier and has its response curve in the figure.
This circuit, from a 1988 documentation, consists of an automatic temperature control using an NTC...
This power supply, found in an Argentine publication from the 1970s, uses a wire potentiometer of 25 W or more...
With this type of circuit, it is possible to obtain high input impedances and, at the same time,...