Multiple choice A good current buffer has low input impedance and low output impedance low input impedance and high output impedance high input impedance and low output impedance 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.