The operational amplifier used in this circuit is uncommon nowadays. We obtained this circuit from documentation from the 1980s, but it can be adapted to use more modern equivalents.
We found this circuit in a 1980s Linear Technology documentation. The components are from the...
This circuit was found in a 1970s American documentation. It can be applied to almost any...
This configuration was found in a publication for radio amateurs in 1975. It is a signal strength...