Need most simple MOSFET amplifier

udhay_cit · 15th September 2012, 09:09 AM

Hi, i need MOSFET amplifier for surround sound speaker's. Anybody please suggest me a very simple MOSFET amplifier!!!

My subwoofer is 250W, so i am looking for 25W-50W amplifier. I found some circuit's in google, but i am not enough good in analog circuit. So i dont know which one is good. Please advice me...

I am looking for Class AB amplifier with less component & power supply size. Please post some working circuit or schematic link.

I am looking for like this... But i dont find the schematic diagram.. (Very simple..

)
Really simple lateral mosfet amplifier

This one is looking good.. Can i go with it

25 Watt MosFet Audio Amplifier - RED - Page2

The attachment has one circuit diagram without component value. will it really work????!!!

I am a beginner so i want to do the work myself.

It's my first Amp also....

Thanks & regards
Udhay

Lazy Cat · 15th September 2012, 09:14 AM

Here

udhay_cit · 15th September 2012, 10:46 AM

Oh my god..

. I am looking for an amplifier is like this.....

Lazy Cat, thanks for the very simple amplifier. The amplifier is so small, but the discussion is very lengthy...

I dont have much experience with amplifier design, so i cannot able to understand & follow the discussion. So please clear some doubt's...

1. Can i replace Lateral MOSFET with vertical MOSFET? Because it very hard to find & very expensive.
2. How much power i can get from this amp?. I hope it may vary with o/p device.Can i use IRF530 & IRF9530 or some other TO-220 package?

Thanks & regards
Udhay

Lazy Cat · 15th September 2012, 01:46 PM

It needs laterals to stay temperature stable and simple as it is. If replaced with vertikal mosfets it would require bias tempco since their transconductance raise with temperature.

Joachim Gerhard uses same simple TSSA with CCS upgrade, maybe he can help you with details.

Anyway TSSA as it is in post #1 works just fine and it can give more than 30 W on 8 ohms.

P.S. Avoid TO-220 case mosfets if output power would exceed 10 Wrms.

Lazy Cat · 15th September 2012, 02:00 PM

Quote:

Originally Posted by udhay_cit

1. Can i replace Lateral MOSFET with vertical MOSFET? Because it very hard to find & very expensive.

You can ask Shaan where he bought lateral mosfets, I'm sure he can give you a good advice.

Vrystaat · 15th September 2012, 11:22 PM

Quote:

Originally Posted by Lazy Cat

You can ask Shaan where he bought lateral mosfets, I'm sure he can give you a good advice.

Try his
Tech DIY Company Store

udhay_cit · 17th September 2012, 10:10 AM

Thank you very much. I try to get some parts....

15th September 2012, 10:46 AM	#3
udhay_cit diyAudio Member Join Date: Feb 2008	Oh my god... I am looking for an amplifier is like this..... Lazy Cat, thanks for the very simple amplifier. The amplifier is so small, but the discussion is very lengthy... I dont have much experience with amplifier design, so i cannot able to understand & follow the discussion. So please clear some doubt's... 1. Can i replace Lateral MOSFET with vertical MOSFET? Because it very hard to find & very expensive. 2. How much power i can get from this amp?. I hope it may vary with o/p device.Can i use IRF530 & IRF9530 or some other TO-220 package? Thanks & regards Udhay

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Really simple lateral mosfet amplifier	Tekko	Solid State	11	25th March 2013 06:31 PM
Simple Mosfet Regulator	Daniel(Del)	Power Supplies	0	20th April 2012 02:09 AM
Simple mosfet amplifier	Eltongp	Solid State	48	26th May 2011 12:12 AM
Simple Op-amp/MOSFET Amplifier (SOMA) 2	miket6000	Headphone Systems	53	18th June 2010 09:51 PM
A simple solid state mosfet amplifier...	Arcaman	Solid State	10	4th June 2009 10:02 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

15th September 2012, 09:14 AM	#2
Lazy Cat diyAudio Member Join Date: Sep 2007	Here

15th September 2012, 01:46 PM	#4
Lazy Cat diyAudio Member Join Date: Sep 2007	It needs laterals to stay temperature stable and simple as it is. If replaced with vertikal mosfets it would require bias tempco since their transconductance raise with temperature. Joachim Gerhard uses same simple TSSA with CCS upgrade, maybe he can help you with details. Anyway TSSA as it is in post #1 works just fine and it can give more than 30 W on 8 ohms. P.S. Avoid TO-220 case mosfets if output power would exceed 10 Wrms.

17th September 2012, 10:10 AM	#7
udhay_cit diyAudio Member Join Date: Feb 2008	Thank you very much. I try to get some parts....