This circuit was obtained from the Encyclopedia of Electronic Circuits volume 5 of 1995. The circuit uses the 4001 CMOS to obtain hysteresis in the sensor feedback.
This circuit was found in an English magazine from 1976. The transistors can be the BC548. The...
Avago Technologies (www.avago.com) suggests the circuit in Figure 9 for amplifying signals of...
The circuit presented shows how to use a diode in temperature compensation of a push-pull output...