What is the advantage of the darlington arrangement for the CC amplifier?

The Darlington arrangement in a common collector (CC) amplifier provides high current gain while maintaining a relatively low input impedance. This configuration consists of two bipolar junction transistors (BJTs) connected in such a way that the current amplified by the first transistor is further amplified by the second. This results in a significant increase in overall current gain without sacrificing the linearity or bandwidth of the amplifier. Additionally, the Darlington pair can drive heavier loads due to its ability to provide higher output current.