Feed-back class D

mgm2000ro · 25th June 2008, 10:48 PM

I am trying to modify an existing schematic (the PCB is already printed). This means I cannot modify too many things, except changing a few parts. I would appreciate some help in finding the best feedback configuration for this schematic.
As I said, no large modifications are possible (like replacing IC's),

Please drow on this schematic

Pafi · 25th June 2008, 11:47 PM

Here it is!

Pafi · 27th June 2008, 12:05 PM

Thank you for the possibility for helping you!

mgm2000ro · 27th June 2008, 07:26 PM

koszonom szepen ! Peter

mgm2000ro · 5th July 2008, 07:15 PM

Hello. I'm back from vacation and ready to tackle the problems. This is how the amplifier works now

Pafi · 5th July 2008, 07:29 PM

This is a nice way to describe the working of your circuit!

Your scope probe seems to have too much capacitance, you should have to change to 1:10 type, but othervise the 10k at the input of gate-driver is too high also. It's better to have much smaller impedances where you need fast changes. You could also increase the current of level-shifter.

Otherwise does it work more or less well?

I've just recognized: +/-120V ?!?

25th June 2008, 10:48 PM	#1
mgm2000ro diyAudio Member Join Date: Nov 2004 Location: Bucharest	Feed-back class D I am trying to modify an existing schematic (the PCB is already printed). This means I cannot modify too many things, except changing a few parts. I would appreciate some help in finding the best feedback configuration for this schematic. As I said, no large modifications are possible (like replacing IC's), Please drow on this schematic

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
neg feed back into v/slope stereo 2 pre-amp	pointy	Tubes / Valves	0	16th March 2009 11:29 PM
10W JFET/MOSFET SE Class A, no Feed Back	widowmaker	Solid State	9	26th November 2006 01:00 PM
Length of feed back resisitor in NIGC	100db	Chip Amps	2	24th February 2006 02:03 AM
Preamp Schematic I Found On The Web. Feed Back Wanted.	LJOE1969	Instruments and Amps	5	29th August 2005 05:53 PM
Current feed back again..............	ashok	Solid State	0	15th November 2004 06:54 AM

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

27th June 2008, 12:05 PM	#3
Pafi diyAudio Member Join Date: May 2004 Location: Budapest	Thank you for the possibility for helping you!

27th June 2008, 07:26 PM	#4
mgm2000ro diyAudio Member Join Date: Nov 2004 Location: Bucharest	koszonom szepen ! Peter

5th July 2008, 07:29 PM	#6
Pafi diyAudio Member Join Date: May 2004 Location: Budapest	This is a nice way to describe the working of your circuit! Your scope probe seems to have too much capacitance, you should have to change to 1:10 type, but othervise the 10k at the input of gate-driver is too high also. It's better to have much smaller impedances where you need fast changes. You could also increase the current of level-shifter. Otherwise does it work more or less well? I've just recognized: +/-120V ?!?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)