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Thread Tools |
20th December 2012, 04:55 PM
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#1 |
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diyAudio Member
Join Date: Feb 2012
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Common emitter stage driving low hfe output stage
Say your output stage has a very high IQ for class A design (lets say 1 amp) but also has a low hfe of 80 (for example 2SC5200 STMicroelectronics | 497-10863-5-ND | DigiKey)
How do you go about driving this output stage without significant voltage drop (compared to an unloaded common emitter stage)? |
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20th December 2012, 05:05 PM
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#2 |
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diyAudio Member
Join Date: Jan 2009
Location: Waterloo, ON or Herefordshire UK
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The driver should have low output impedance and ability to source current. Another emitter follower is the popular solution. a CFP can provide some advantages.
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