In the figure we have two circuits of limiters that provide the cut of the negative peaks of a signal. The circuit is from an 80's telecom documentation being adaptable on common receivers.
This interesting multivibrator was found in an Italian magazine that no longer exists. This is...
With this circuit it is possible to demonstrate the working principle of an optocoupler. The LEDD...
This circuit is indicated to power TTL circuits with current drains up to 500 mA. The transistor...