This circuit was obtained from an American 1980s documentation. The frequency depends on the crystal and the circuit may be a PNP that reaches the generated frequency.
April 2017 - New Texas Instruments DRV8x brush motor drivers for 1.7 to 8 A currents and voltages...
This circuit was found in a technical documentation from the 90's. The transistors can be...
This circuit was found in American documentation from the 90's. The circuit applies to any...