A hobbyist project note reads: "I biased the push-pull output pair with a multiplier…
PHYSICS · Multi-part · Fermi University Physics · Electronics, Instrumentation & Communication · Semiconductor devices and analogue circuits · Feedback, operational amplifiers and analogue signal processing
Inside the Instrument, Ch Multistage amplifiers, the Miller effect and output stages
Problem
A hobbyist project note reads: "I biased the push-pull output pair with a VBE multiplier trimmed to give 100mA idle current, and wired each output transistor's emitter straight to its supply rail and the load, with no resistor in series, because the bias network's fixed voltage is what sets VBE, and so the idle current is fixed regardless of temperature."
((a)) Find the error in this reasoning.
((b)) Give one specific fix, with a component value, that removes it.