Reduce DAC output current ?

Bernhard · 10th January 2006, 05:40 PM

Hi,

how can I reduce the output current of a DAC by 100 or so ?
Any active circuit with op amp for 1 x current in -> 1 / 100 x current out ?

Petter · 10th January 2006, 10:46 PM

I recommend that you look in Horrowitz and Hill, The Art of Electronics - as per my memory, there should be current divider circuitry using resistors (passive) in there which might help you + a bunch of active circuits. It is a really good book. You can also do some interesting things with current mirrors and also mess with the reference setting of DAC devices (even that is usually already optimized).

However you also mention discrete. To me it would be easier to set up a bunch of current sources using either resistors against a fixed voltage or traditional current sources.

I understand that one of the issues with a resistor network is noise. Good luck and let us know how you fare!

Petter

10th January 2006, 05:40 PM	#1
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	Reduce DAC output current ? Hi, how can I reduce the output current of a DAC by 100 or so ? Any active circuit with op amp for 1 x current in -> 1 / 100 x current out ?

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
COD - Current Output DAC	BrianDonegan	Twisted Pear	150	27th March 2013 04:15 PM
Dummy load to reduce output of 300w/ch amp?	steve71	Solid State	18	1st January 2008 11:07 PM
How to reduce bass output???	bmunson	Subwoofers	2	18th October 2005 04:36 AM
Help:How To Reduce Transformer Output Voltage?	phill77	Solid State	0	21st April 2003 12:04 PM
Can i lower the bias current in the alpeh 5 to reduce power and heat?	hifi	Solid State	4	7th April 2002 07:48 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

10th January 2006, 10:46 PM	#2
Petter diyAudio Member Join Date: Jan 2001 Location: Scandinavia	I recommend that you look in Horrowitz and Hill, The Art of Electronics - as per my memory, there should be current divider circuitry using resistors (passive) in there which might help you + a bunch of active circuits. It is a really good book. You can also do some interesting things with current mirrors and also mess with the reference setting of DAC devices (even that is usually already optimized). However you also mention discrete. To me it would be easier to set up a bunch of current sources using either resistors against a fixed voltage or traditional current sources. I understand that one of the issues with a resistor network is noise. Good luck and let us know how you fare! Petter