This very high input impedance JFET circuit was found in the 1995 Encyclopedia of Electronic Circuits Volume 5. The JFET is a general-purpose transistor as is the output transistor.
This ultra-low frequency receiver circuit was published in the August 1973 issue of Radio...
Maxim MAXREFDES67 Universal Analog Input Micro PLC is ideal in factory automation because of its...
The sensor of this circuit is an NTC with a resistance between 200 and 1000 ohms. The resistor R1 must...