This circuit is from the National Semiconductor's Linear Applications Handbook of 1994. The circuit can be implemented with equivalent operational. The detected voltage is given by the diode.
Found in an American publication from 1969, this circuit can be adapted to be used as a shield....
This circuit was found in a 90's Electronic Design. The circuit can be adapted to use modern...
This input circuit for an oscilloscope was found in Radio Electronics from the 90s. The operating...