Placed near a common receiver, this oscillator is intended to generate a beating signal to receive RTTY or SSB communications. The circuit is from old telecommunications documentation.
The gain of the operational amplifier shown in the figure depends on the feedback resistor,...
June 2016 - It can be obtained from Mouser Electronics the new gate driver optocoupler from...
Figure shows the basic application of a data selector using the 4051 . The same configuration is...