latest version of Lizi

Leolabs · 21st October 2006, 02:34 AM

After a few months of trial and error,finally she is ready to rock n roll

Leolabs · 21st October 2006, 02:37 AM

Only one weak point due to non-strictly-matched components

utput offset drift.First turn-on is around -100mV,then settle to +30mV after usage.

lineup · 21st October 2006, 04:10 AM

hey Leolabs

Guess you forgot to reduce size of your schematic ( 3529x2528 ).
I attach a PNG version that fits a normal screen well.

Now folks,
lets explore and find out some good details of
this minimalistic Lateral MOSFET Amplifier creation.

lineup

lumanauw · 21st October 2006, 04:21 AM

How is the sound? ClassA? ClassAB?

bogdan_borko · 21st October 2006, 05:00 PM

Hi Leolabs! Nice mini design.

Do you have spice models for latheral mosfets? (for circuitmaker), have you simulated it before you made it and what are the differences in spice and real operation?

how does it sounds?

mikeks · 21st October 2006, 05:55 PM

When R3 fails open, however briefly, the output will saturate to within a few millivolts of the supply rails causing your 'speakers to burn!

See below for solution.

Delete R8 & R12: they are of no use to Man or Beast.

mikeks · 21st October 2006, 05:59 PM

Frequency compensation?

mikeks · 21st October 2006, 06:00 PM

Replace R10 with this:

bogdan_borko · 21st October 2006, 06:04 PM

Yes, R8 and R12 are useless in this case, but ther`s no need for thermal compensation! These are lateral mosfets(2SK134/J50).

cheers!

mikeks · 21st October 2006, 06:18 PM

Quote:

Originally posted by bogdan_borko
.........there's no need for thermal compensation! These are lateral mosfets(2SK134/J50).

cheers!

Who said anything about thermal compensation?

21st October 2006, 02:34 AM	#1
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	latest version of Lizi After a few months of trial and error,finally she is ready to rock n roll

21st October 2006, 02:37 AM	#2
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	Only one weak point due to non-strictly-matched componentsutput offset drift.First turn-on is around -100mV,then settle to +30mV after usage.

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21st October 2006, 04:21 AM	#4
lumanauw diyAudio Moderator Emeritus Join Date: Oct 2002 Location: Bandung	How is the sound? ClassA? ClassAB?

21st October 2006, 05:00 PM	#5
bogdan_borko diyAudio Member Join Date: Nov 2005 Location: serbia, zajecar	Hi Leolabs! Nice mini design. Do you have spice models for latheral mosfets? (for circuitmaker), have you simulated it before you made it and what are the differences in spice and real operation? how does it sounds?

21st October 2006, 05:59 PM	#7
mikeks Account Disabled Join Date: Jun 2004 Location: Animal farm	Frequency compensation?

21st October 2006, 06:04 PM	#9
bogdan_borko diyAudio Member Join Date: Nov 2005 Location: serbia, zajecar	Yes, R8 and R12 are useless in this case, but ther`s no need for thermal compensation! These are lateral mosfets(2SK134/J50). cheers!