bridging chip amps

Snakebyte · 1st July 2004, 07:07 PM

Hi,

Iv'e been reading on how to bridge amps, but I'm not quite sure
I am getting it.

Do I need to use a "bridging adapter", or do I simply connect the
"+ input" to one chip and the "- input" to the other?

Thanks

Snakebyte

yes I have read, :-)
AN-1192.pdf

mrlots2do · 1st July 2004, 07:41 PM

There is a reference in another thread to your question. It basically says one chip (non-inverted) is + output to driver and other chip (inverted) is - output to driver. Theree is also a schematic it references.

jackinnj · 1st July 2004, 07:46 PM

it's application note 1192 at National Semi, http://www.national.com/an/AN/AN-1192.pdf

also apnote 446
http://www.national.com/an/AN/AN-446.pdf

cdoggy81 · 1st July 2004, 10:31 PM

Hi Snakebyte,
Glad you asked as well. I was also wondering why. Does one have to use an input op amp (like LF412ACN, Dual JFET Input Op Amp or LF411ACN, JFET Input Op Amp in the application notes or what about TI's DVR134???) What exactly do they do again?

Thanks guys!!!

1st July 2004, 07:07 PM	#1
Snakebyte diyAudio Member Join Date: Jun 2004 Location: Skudeneshavn	bridging chip amps Hi, Iv'e been reading on how to bridge amps, but I'm not quite sure I am getting it. Do I need to use a "bridging adapter", or do I simply connect the "+ input" to one chip and the "- input" to the other? Thanks Snakebyte yes I have read, :-) AN-1192.pdf

1st July 2004, 10:31 PM	#4
cdoggy81 diyAudio Member Join Date: Feb 2004 Location: Gainesville, FL	Hi Snakebyte, Glad you asked as well. I was also wondering why. Does one have to use an input op amp (like LF412ACN, Dual JFET Input Op Amp or LF411ACN, JFET Input Op Amp in the application notes or what about TI's DVR134???) What exactly do they do again? Thanks guys!!! __________________ It's better to have loved & lost than to never have had a good pair of speakers at all.......

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1st July 2004, 07:41 PM	#2
mrlots2do diyAudio Member Join Date: May 2004 Location: Philadelpia	There is a reference in another thread to your question. It basically says one chip (non-inverted) is + output to driver and other chip (inverted) is - output to driver. Theree is also a schematic it references.

1st July 2004, 07:46 PM	#3
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	it's application note 1192 at National Semi, http://www.national.com/an/AN/AN-1192.pdf also apnote 446 http://www.national.com/an/AN/AN-446.pdf

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