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Old 14th June 2006, 10:47 PM   #1
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Default KentAudio "Construction ONE"

HEllo good people!

After 18 months, reading diyAudio threads, articles and

books of all well known audio gurus

(Pass,,Curl,Slone,Hiraga,Stochino,...) ,and examining all

kind of circuits and topologies, I finally designed my

own compatibile audio system.
The work wasn`t easy at all! My knowlege of solid state

amplifiers was pour(still learning), and I spent days and

nighhts simulating all kind of circuits and building two

ab-class standard amplifiers...

The "Construction ONE" system is actually my version of

class-a single-ended mosfet source-follower (used for

current amplification) and current-feedback high-speed

preamplifier (used for voltage amplification).

I would like to hear your comments about this circuits

I`ve designed before I start pcb construction.

The simulation results:

Current amplifier:
Q9, Q10: 4.89mA
driver stage: 58.8mA
power stage: each IRFP240: 2.8A
each IRFP250: 4.2A
THD: 0.00293%
Input:10.59Vrms
Output power 30W


Voltage amplifier:
Input stage: 2mA
VAS:5.4mA
Output stage:30mA
Input voltage for full output stage power:700.6Vrms
simulation result of slew rate: 214V/uS


Thanks, Bogdan.
Attached Files
File Type: pdf se current amplifierfi.pdf (30.8 KB, 197 views)
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Old 14th June 2006, 10:49 PM   #2
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preamplifier shematic:
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File Type: pdf preampli.pdf (28.4 KB, 154 views)
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Old 15th June 2006, 07:04 AM   #3
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hm...
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Old 15th June 2006, 11:58 AM   #4
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Is it so uninteresting?
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Old 15th June 2006, 04:08 PM   #5
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Hi,when you really build it,then it is very interesting.
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Old 15th June 2006, 05:23 PM   #6
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you didn`t read the thread ,I think...
I was asking, what do you think about the circuits and should I change somthing to improve it...
Question for a power follower: would it be better to bias the driver stage (MJE 15030) with the simple ressistor and does ccs improves something in this case.

THanks.
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Old 15th June 2006, 06:34 PM   #7
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The voltage gain stage is seems like modified CFP. With the same part count you can built diamond buffer. Which is better?
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