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VSSA Lateral MosFet Amplifier
VSSA Lateral MosFet Amplifier
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Old 7th January 2013, 04:59 PM   #311
Lazy Cat is offline Lazy Cat  Slovenia
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No output serial inductance, only 8 ohm load resistor and 0,22 uF parallel to the load when performing 50 kHz squares test.

Thanks for the links Esperado.
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Old 7th January 2013, 05:18 PM   #312
Esperado is offline Esperado  France
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No output serial inductance, only 8 ohm load resistor and 0,22 uF parallel to the load when performing 50 kHz squares test.
Impressive ! Congratulations, as habit.
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Old 7th January 2013, 10:32 PM   #313
Idefixes is online now Idefixes  France
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Hi LC,

First try out for 1.4 version. The board size is 72x72mm
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File Type: png VSSA_1.4_sch.png (20.6 KB, 2197 views)
File Type: png VSSA_1.4_brd.png (35.2 KB, 2114 views)
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Old 7th January 2013, 11:45 PM   #314
Lazy Cat is offline Lazy Cat  Slovenia
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Preliminary VSSA PCB 1.4, 50 x 60 mm
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Old 8th January 2013, 07:59 AM   #315
tinitus is offline tinitus  Europe
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VSSA Lateral MosFet Amplifier
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Old 8th January 2013, 07:59 AM   #316
Esperado is offline Esperado  France
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Preliminary VSSA PCB 1.4, 50 x 60 mm
Missing tracks on the FET CSSs ?
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Old 8th January 2013, 08:12 AM   #317
Lazy Cat is offline Lazy Cat  Slovenia
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Quote:
Originally Posted by Esperado View Post
Missing tracks on the FET CSSs ?
It is not finished yet. I went to sleep before ending. Today it will be done.
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Old 8th January 2013, 08:38 AM   #318
Lazy Cat is offline Lazy Cat  Slovenia
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Exclamation VSSA 1.4 MosFet Amplifier PCB

VSSA 1.4 PCB final version. Miller capacitors, offset and bias setting resistors on the top, to be easy accessible and tuned to the exact value. No trimmers for no-compromise long term reliability. Output RC filter splitted in to two ways to have better power dissipation since SMDs are used.

Have fun.
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Old 8th January 2013, 08:43 AM   #319
Idefixes is online now Idefixes  France
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Quote:
Originally Posted by Lazy Cat View Post
VSSA 1.4 PCB final version. Miller capacitors, offset and bias setting resistors on the top, to be easy accessible and tuned to the exact value. No trimmers for no-compromise long term reliability. Output RC filter splitted in to two ways to have better power dissipation since SMDs are used.

Have fun.
What value have you use than?

Marc
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Old 8th January 2013, 09:05 AM   #320
Lazy Cat is offline Lazy Cat  Slovenia
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Output filter made by 22 ohm/1 W, 47 nF/100 V SMDs times two. Other requested values are easily calculated by help from Ohm's Law.
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