Matching a high ouput Z high volt level source to a lowZ ground reference load, (hobby transistor design lesson)

In this video we continue on with our schmitt trigger circuit, we always have a idle, standing voltage at the output of a schmitter circuit, thats going to be around the voltage value of the threshold design value, many times a load needs to be driven from ground reference.

So the output of this schmitter is not right for such a load, so a coupling circuit needs to be put in between the output of the schmitt, and the load,, this circuit does two things, it matches a high output impedance of the schmitt, to a low input impedance of the load, as well as sets the load reference to ground voltage.


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enjoy...