Have a look at my new TDA1545 DAC (lots of details on page) - Page 7

Werner · 11th September 2003, 02:19 PM

Indeed. Variations on this theme ...

peufeu · 11th September 2003, 04:12 PM

Quote:

Originally posted by Pedja

Werner,

If you add one NPN here, you might have linear output impedance till the MHz range.

Pedja

But it would no longer be a shunt reg ? It depends on how you wire it...

Pedja · 11th September 2003, 05:46 PM

Quote:

Originally posted by peufeu
But it would no longer be a shunt reg ? It depends on how you wire it...

It would. Nothing is in series. But in fact 431 will be used as a voltage reference only (instead of zener in Werner’s schematic).

Pedja

Bricolo · 11th September 2003, 10:37 PM

Why is the TL431 the only IC shunt reg used

?

For series IC regulators, there is a little diversity (317, 1085, 7815...) but for shunt regs, the only one I see here is the 431.
What about the 1431, this one looks better than the 431

Bricolo · 18th September 2003, 07:17 PM

Quote:

Originally posted by Bricolo
Why is the TL431 the only IC shunt reg used ?

For series IC regulators, there is a little diversity (317, 1085, 7815...) but for shunt regs, the only one I see here is the 431.
What about the 1431, this one looks better than the 431

no answear?

apassgear · 20th September 2003, 12:13 AM

I was just reading this thread and noticed someone ask about OPA660.

As far as I know I'm the only one who has tested this I/V. The circuit is based on Thorsten suggestions.

I can't compare with all these stages on the thread but is my guess that is very competitive.

I did some monitoring of the drift at the output of the OPA and it was not more than 3 mv with the lid on top of the CDP so I decided to get rid of the output cap. The circuit uses current injection at the DACs output

Soudwise is realy outstanding.

See the OPA660 I/V thread

eVITAERC · 15th December 2005, 11:53 PM

I'm sorry about digging this old thread up...

Currently I'm trying to implement a version of peufeu's I/V stage for my Monica 2. The only problem is that there is no way to get workable voltages out of what's feeding the monica for the OPAMP and the CCS, so I have to get an external dual PSU to do the job.

My question is where do I stab the ground of the dual PSU? The ground on peufeu's circuit looks like it should lead back to Monica's analog ground, and not all the current is flowing into V-.... so does that mean I would end up tying the ground of my dual PSU to the Monica's, just by implementing this circuit? This might cause some ground loop issues in my situation...

eVITAERC · 16th December 2005, 03:28 PM

no takers?

20th September 2003, 12:13 AM	#66
apassgear diyAudio Member Join Date: Nov 2002 Location: Viña del Mar, Torreon	Opa660 I/V I was just reading this thread and noticed someone ask about OPA660. As far as I know I'm the only one who has tested this I/V. The circuit is based on Thorsten suggestions. I can't compare with all these stages on the thread but is my guess that is very competitive. I did some monitoring of the drift at the output of the OPA and it was not more than 3 mv with the lid on top of the CDP so I decided to get rid of the output cap. The circuit uses current injection at the DACs output Soudwise is realy outstanding. See the OPA660 I/V thread

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
Adcoms with lots of DC offset. Lots!	ben62670	Solid State	71	16th February 2010 03:01 AM
WTB TDA1545´s	figge77	Swap Meet	0	28th May 2009 10:45 AM
I am looking for tda1545.	yangsmm	Swap Meet	0	17th October 2006 05:16 PM
WTB: a few TDA1545:s	hifi	Swap Meet	5	25th July 2006 04:41 PM
TDA1545 question	jkeny	Digital Line Level	2	30th August 2003 02:21 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

11th September 2003, 10:37 PM	#64
Bricolo diyAudio Member Join Date: Nov 2002 Location: Grenoble, FR	Why is the TL431 the only IC shunt reg used ? For series IC regulators, there is a little diversity (317, 1085, 7815...) but for shunt regs, the only one I see here is the 431. What about the 1431, this one looks better than the 431

15th December 2005, 11:53 PM	#67
eVITAERC diyAudio Member Join Date: Aug 2005	I'm sorry about digging this old thread up... Currently I'm trying to implement a version of peufeu's I/V stage for my Monica 2. The only problem is that there is no way to get workable voltages out of what's feeding the monica for the OPAMP and the CCS, so I have to get an external dual PSU to do the job. My question is where do I stab the ground of the dual PSU? The ground on peufeu's circuit looks like it should lead back to Monica's analog ground, and not all the current is flowing into V-.... so does that mean I would end up tying the ground of my dual PSU to the Monica's, just by implementing this circuit? This might cause some ground loop issues in my situation...

16th December 2005, 03:28 PM	#68
eVITAERC diyAudio Member Join Date: Aug 2005	no takers?