Assume A is a standard operational amplifier with e.g. 20 mA maximum output current and compensation current Is is is as high as 200 mA. Then you need a current booster stage like the complementary emitter follower shown in the schematic.
Assume A is a standard operational amplifier with e.g. 20 mA maximum output current and compensation current Is is is as high as 200 mA. Then you need a current booster stage like the complementary emitter follower shown in the schematic.
It's not a darlington amplifier. It's a push-pull output driver: https://en.wikipedia.org/wiki/Push–pull_output
In certain cases (eg when driving MOSFETs), it's referred to as totem-pole driver.