Rails of most amps will be three times the RMS output voltage minus

thylantyr · 5th February 2004, 01:32 AM

Is this statement true ?

http://www.carsound.com/UBB/ultimate...=022178#000002

Post #3.

Ouroboros · 5th February 2004, 07:11 AM

Pretty much true as a rule-of-thumb for the rail-to-rail voltage.

Consider, for sinewaves. V peak-peak will be 2.828 x vrms, so a figure of 3, with a couple of volts or so allowed for the drop across the output transistors isn't so far off.

If you use MOSFET source followers in the output stage then you will need to add more headroom because you need to allow for the V(g-s) of the FET.

Chris Morriss.

5th February 2004, 01:32 AM	#1
thylantyr diyAudio Member Join Date: Feb 2001 Location: Mars	Rails of most amps will be three times the RMS output voltage minus Is this statement true ? http://www.carsound.com/UBB/ultimate...=022178#000002 Post #3.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
minus 25 on output mosfet amp	Jan Deckers	Solid State	3	12th April 2009 05:14 PM
LM3876TF: minus 5 to 7 volt DC at the output	Dino-Indo	Chip Amps	9	5th September 2008 12:27 AM
i know many times....output potentiometer	Stefanoo	Pass Labs	13	24th December 2007 08:11 AM
Why are TI's chip amps (OPA549) six times the price of National's (LM38xx)?	nick_g_evans	Chip Amps	20	20th November 2004 02:39 PM
Safe Working voltage of output Transistors in class AB amps with +/- supply	rajeev luthra	Solid State	3	31st July 2004 06:58 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

5th February 2004, 07:11 AM	#2
Ouroboros diyAudio Member Join Date: Dec 2003 Location: Nottingham UK	Pretty much true as a rule-of-thumb for the rail-to-rail voltage. Consider, for sinewaves. V peak-peak will be 2.828 x vrms, so a figure of 3, with a couple of volts or so allowed for the drop across the output transistors isn't so far off. If you use MOSFET source followers in the output stage then you will need to add more headroom because you need to allow for the V(g-s) of the FET. Chris Morriss.

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