Common collector as output stage - problems

stanislavb · Dec 31, 2009

Audioguru said:
stanislavb said:

Hi,
I got better result with R3=100 Ohm. I simulate in PSpice 9.2

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Then the output transistors are both turned on a lot at the same time with a current of 34mA and the resulting high current makes them hot and quickly drains the battery. With 33 ohms the crossover distortion is nearly eliminated and the current in the output transistors is only 4mA.
Maybe R3 should be 39 ohms.

According my simulation R3=100 cause additional 16% in total power consumption from battery. I agree with you that 100 ohm open both transistor more time then 33 ohm. However in whole power consumption I did not find such difference as you show: 34mA vice 4mA (8 times).
Happy new year!

Common collector as output stage - problems

stanislavb

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Common collector as output stage - problems

stanislavb

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