This circuit is from Philips' 60s documentation. The circuit can be applied to modern operational amplifiers. The power supply must be symmetrical.
We found this easy start circuit in Electronics Now magazine from December 1993. The frequency is...
We found this circuit in an old American documentation. The circuit can be applied to modern...
This differential amplifier, found in a 1964 Electronic Design, has a gain of 30. The setting can be...