Regarding the following excerpt:
High impedance source gives you more volts and less current
Low impedance source gives you lower voltage but more current
What is meant by low impedance source and high impedance source here?
By "impedance" is it meant the output impedance? If so how is that relates to the source utilizing more power? How to comprehend this by circuit model? I came to this confusion after reading about piezoelectric amplifying techniques.
Best Answer
I don't agree with those statements by themselvas they intend to be generically true but they're not. If a sentence was added like:
Here's an example of both:
simulate this circuit – Schematic created using CircuitLab
Here the load and source impedance are the same, that's because I want to extract the maximum amount of power from the source. Both sources will deliver 2 Watts each.
Note how the power in my load resistor is 1 Watt in both cases. In the high(er) impedance case, the voltage is 10x higher but the current is 10x lower.