hey guys, its exam i got one small question.
What is the difference btwn the two circuits below, i know that there is the op amp in the middle, but its a voltage follower and i cant see what it does exactly. i tried googling it, but there's not much explaination on what a voltage follower does. Thanks for your time!
PS. i read this online, as well as in my text book. "provides a high input impedance, a low output impedance, and unity gain" what does that mean exactly? would the impedance before the voltage follower be ignored then if it has close to infinite impedance?
What is the difference btwn the two circuits below, i know that there is the op amp in the middle, but its a voltage follower and i cant see what it does exactly. i tried googling it, but there's not much explaination on what a voltage follower does. Thanks for your time!
PS. i read this online, as well as in my text book. "provides a high input impedance, a low output impedance, and unity gain" what does that mean exactly? would the impedance before the voltage follower be ignored then if it has close to infinite impedance?
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