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Old 14th September 2008, 11:33 AM   #1
Stee is offline Stee  Italy
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Default all Gain Stages AMP

hello

see this new project with MPSA transistors
and Voltage gain also in final devices as IGBT
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Old 14th September 2008, 05:53 PM   #2
lineup is offline lineup  Sweden
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looks like it will work well
maybe even be very good
.. depends on your used transistors and current levels

2 resistors serve no good purpose:
those two at most far right = from POWER Transistors collectors.
The only thinkable purpose, that they may do,
is to reduce Max Output current = some protection.
Other wise these 2 resistorswill only make output stage
work more BAD

Lineup regars
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Old 14th September 2008, 08:07 PM   #3
Stee is offline Stee  Italy
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Default hello

really at the moment i have tested FET parallel with IGBT
works very good
(k170 and J74 + GT20D101/201)

THE PROBLEM is found an equivalent circuit
because this TOSHIBA devices are hard to buy
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