This circuit is from a 60's documentation. The capacitance C1 can be between 20 pF and 0.01 uF depending on the generated frequency. Equivalent transistors may be employed.
The figure shows the basic circuit of a relaxation oscillator with operational amplifier. The...
This circuit was obtained from American documentation from 1966. It triggers when the two input...
Found in an American 1980s documentation, this circuit generates high-intensity pulses for a...