L_jack_xing
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Why Q4's on would not put the voltage at emitter of Q5 down?
When Q4 turns on, all that happens is that current flows from the collector to the emitter of Q4. Very little current flows in the base of Q4 to make this happen. The amount of current flowing in the base is so small that it has very little effect on the total current through R16, so the voltage at the end of R16 can stay the same and Q5 can stay on.Why Q4's on would not put the voltage at emitter of Q5 down?
When Q4 turns on, all that happens is that current flows from the collector to the emitter of Q4. Very little current flows in the base of Q4 to make this happen. The amount of current flowing in the base is so small that it has very little effect on the total current through R16, so the voltage at the end of R16 can stay the same and Q5 can stay on.
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