Found in older Signetics documentation, this circuit generates signals from 30 Hz to 25 kHz. Operational amplifiers are from the time, as is the matching pair of transistors.
This nonlinear gain circuit was found in a 1965 Electronic Design. The configuration can be used...
This circuit uses an operational amplifier that is still common today. The indication is made by...
The circuit shown is from the National Semiconductor's Linear Applications Handbook. The CI is not...