Multiple choice

A good current buffer has

  1. low input impedance and low output impedance

  2. low input impedance and high output impedance

  3. high input impedance and low output impedance

  4. high input impedance and high output impedance

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An ideal current buffer must have the zero input impedance and infinite output impedance, i.e. Zin = 0 Zo = $\infty$ Hence, a good current buffer has low input impedance and high output impedance.