This circuit is from the manual of the integrated circuit used. Similar versions appear on this website and even in this section.
Emitt This crystal-controlled oscillator can generate signals from 100 kHz to over 30MHz. The...
Figure 1 shows a hal-wave voltage doubler operating with the Power-supply voltage. Output current...
Other operational amplifiers in the series, such as the MC34072, MC34074, MC35071, MC35072,...