Discrete I-V conv.

alex0 · 25th May 2004, 12:16 PM

This schematic of discrete I-V converter was published in “Current-steering transimpedance amplifiers for high-resolution digital-to-analogue converters” by M.O.J. Hawksford
http://esewww.essex.ac.uk/research/audio
Opinions?

Elso Kwak · 25th May 2004, 01:55 PM

Hi,
You mean this link?:
http://www.essex.ac.uk/ese/research/...lab/index.htm;)

ojg · 25th May 2004, 03:05 PM

Y'all probably meant this link!

Very interesting paper, thanks!

Nixie · 16th July 2006, 07:06 AM

Why did discussion die here?

I find this paper very interesting. Anyone implement any of the circuits in there? Or why not?

Bricolo · 19th July 2006, 04:54 PM

Nice paper and very smart design, strange that we don't see anyone building it here

X.G. · 21st July 2006, 05:19 PM

I guess the basic topology is inspired from the Super Linear C ircuit of Japanese Pioneer.

I have recently re-designed/modifed the SLC circuit for my pre-amp,and got excellent sound which more like tube.

I will build the I/V circuit based on it next step.

Nixie · 22nd July 2006, 02:42 AM

That makes no sense. Error correction is a Hawksford invention, superficial similarities to other topologies notwithstanding.

Bricolo · 28th September 2006, 10:17 AM

I have one question;

In page 19 the author claims that the return path for the filter and I/V resistor (going to T1's emittor) is a current feedback path.

I don't really see the feedback here, I see this path as a return pth for the currents, making them go back in T1's path and so T1 operates in a constant current operation (nice!)

Where is the current feedback in here?

Bricolo · 1st October 2006, 09:55 AM

Did anyone build or even simulate the circuit?

On my simulations, it's drawing 60mA o both supplies (15V), that seems to be a bit on the high side...

aparatusonitus · 2nd October 2006, 09:26 AM

Hi Bricolo,

I've simulated it in LTSwCad and have almost the same results: 62mA88 on +15 and 67mA19 on -15 rail, but I've place a 2mA J-fet current source for TDA1541A current offset nulling at the input.

25th May 2004, 01:55 PM	#2
Elso Kwak Banned Join Date: Dec 2001 Location: Zamboanga, City of Flowers, Mindanao	Link Hi, You mean this link?: http://www.essex.ac.uk/ese/research/...lab/index.htm;)

19th July 2006, 04:54 PM	#5
Bricolo diyAudio Member Join Date: Nov 2002 Location: Grenoble, FR	Nice paper and very smart design, strange that we don't see anyone building it here __________________ Just remember: in theory there's no difference between theory and practice. But in practice it usually is quite a bit difference... Bob Pease

28th September 2006, 10:17 AM	#8
Bricolo diyAudio Member Join Date: Nov 2002 Location: Grenoble, FR	I have one question; In page 19 the author claims that the return path for the filter and I/V resistor (going to T1's emittor) is a current feedback path. I don't really see the feedback here, I see this path as a return pth for the currents, making them go back in T1's path and so T1 operates in a constant current operation (nice!) Where is the current feedback in here? __________________ Just remember: in theory there's no difference between theory and practice. But in practice it usually is quite a bit difference... Bob Pease

1st October 2006, 09:55 AM	#9
Bricolo diyAudio Member Join Date: Nov 2002 Location: Grenoble, FR	Did anyone build or even simulate the circuit? On my simulations, it's drawing 60mA o both supplies (15V), that seems to be a bit on the high side... __________________ Just remember: in theory there's no difference between theory and practice. But in practice it usually is quite a bit difference... Bob Pease

2nd October 2006, 09:26 AM	#10
aparatusonitus diyAudio Member Join Date: Jan 2004 Location: Split, Croatia	Hi Bricolo, I've simulated it in LTSwCad and have almost the same results: 62mA88 on +15 and 67mA19 on -15 rail, but I've place a 2mA J-fet current source for TDA1541A current offset nulling at the input. __________________ Non é mai abbastanza...


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25th May 2004, 03:05 PM	#3
ojg diyAudio Member Join Date: May 2003 Location: Norway	Y'all probably meant this link! Very interesting paper, thanks!

16th July 2006, 07:06 AM	#4
Nixie Banned Join Date: Jan 2006 Location: Vancouver, BC	Why did discussion die here? I find this paper very interesting. Anyone implement any of the circuits in there? Or why not?

21st July 2006, 05:19 PM	#6
X.G. diyAudio Member Join Date: Sep 2003 Location: GuangDong China	I guess the basic topology is inspired from the Super Linear C ircuit of Japanese Pioneer. I have recently re-designed/modifed the SLC circuit for my pre-amp,and got excellent sound which more like tube. I will build the I/V circuit based on it next step.

22nd July 2006, 02:42 AM	#7
Nixie Banned Join Date: Jan 2006 Location: Vancouver, BC	That makes no sense. Error correction is a Hawksford invention, superficial similarities to other topologies notwithstanding.

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