This signal injector and tracer (follower) was found in an old American documentation. The transistors can be general use and power is made with one or two common cells.
This circuit provides 6.3V of output from a 9V input. The circuit was found in a Dutch publication from...
August 2017 - Mouser Electronics already has in stock the new integrated circuit CP2615, which...
The output voltage of this circuit is equal to the sum of the input voltages, if the result is...