This circuit was found in American documentation from the 1960s. The operational amplifier is from that time, but the configuration applies to modern equivalents.
This decorative object was found in a Signetics documentation from the 60s. The circuit uses neon...
Found in documentation from the 1980s, this amplifier uses an integrated circuit from the time....
This circuit is based on the voltage drop of the diodes in conduction, in the order of 1.6 to 1.7...