This circuit appears on this site from different sources. This is from documentation from the 1980s. The operating system used is uncommon and can be replaced by a more modern equivalent.
This signal attenuator was suggested by Electronics Now magazine in April 1999. The circuit is...
This circuit is from a manual of linear integrated circuits of the 80s. The operational is of the...
This circuit is from a 1978 publication, and the integrated diode bridge can be replaced by...