The operational amplifier used in this application is uncommon today. This Raytheon circuit can be designed with equivalent operational and the power supply must be symmetrical.
Static charges in objects Dan be detected by this sensitive electroscope. The meter indicates when the...
This simple field strength meter is from a transistor book from the 60's. The transistor is made...
The current drained by this circuit, from a 1976 documentation, is 3 mA and the cut-off frequency is...