This circuit was found in Siliconix documentation from the 1980s. Equivalent operational amplifiers can be used and the output current is very low.
The circuit shown is only for analog telephone lines. I found it in Popular Electronics (1991). It...
June 2016 - Mouser can immediately deliver the TPS54xx plate for experiments with Buck converters from...
The circuit shown in the figure is triggered by an input voltage determined by the setting of P1....