Re: Ahhhhh!! - Elso Kwak - Tweakers' Asylum

Re: Ahhhhh!!

Posted by Elso Kwak (A) on March 13, 2002 at 12:29:28

In Reply to: Re: Ahhhhh!! posted by MBK on March 13, 2002 at 10:20:16:

Hi MBK,
Yes I am using two DAC's per channel, not the most cheap solution.
Especially a dual dac chip like AD1865 or TDA1541 seems ideally suited as the two DAC's are on the same chip and should be better matched than two separate DAC's.
I am using 1% polypropylene caps, with some matching of equal value caps, and trimming of the outputs of the DAC I come a long way in common mode rejection.
Converting a multiple feedback low pass filter to a differential input filter took me some braingrinding. With the help of the application note attached to the CS4329 datasheet I succeeded.("Design Notes for a 2-Pole Filter with Differential Input"). I do not use the formula's of Crystal any more, just the idea, and use the FilterPro from Texas Instruments.
When I was using opamps I used two AD811 or OPA603 per channel for IV conversion and a AD827 for output. Today I am using completely discrete circuitry that takes quite a bit of boardspace.
ELSO

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Follow Ups Full Thread

Topic - TDA1541A sin(x)/x, I/V ... do I get this right - MBK 09:47:02 03/08/02 (19)

Re: TDA1541A sin(x)/x, I/V ... do I get this right - Elso Kwak 14:24:40 03/08/02 (17)

Ahhhhh!! - MBK 23:10:56 03/08/02 (11)

Re: Ahhhhh!! - Elso Kwak 03:35:28 03/12/02 (9)

Re: Ahhhhh!! - MBK 07:11:10 03/12/02 (8)

Re: Ahhhhh!! - Elso Kwak 00:20:14 03/13/02 (7)

Re: Ahhhhh!! - MBK 00:52:37 03/13/02 (6)

Re: Ahhhhh!! - Elso Kwak 09:46:24 03/13/02 (5)

Re: Ahhhhh!! - MBK 10:20:16 03/13/02 (4)

Re: Ahhhhh!! - Elso Kwak 12:29:28 03/13/02 (3)

changed to resistor i/v now... - MBK 09:23:52 03/14/02 (0)

Re: Ahhhhh!! - MBK 02:06:17 03/14/02 (1)

Re: Ahhhhh!! - Elso Kwak 13:18:07 03/15/02 (0)

Re: Ahhhhh!! - Thorsten 04:47:22 03/09/02 (0)

Re: TDA1541A sin(x)/x, I/V ... do I get this right - Thorsten 15:28:55 03/08/02 (4)

Re: TDA1541A sin(x)/x, I/V ... do I get this right - steve jones 11:06:50 03/09/02 (1)

Re: TDA1541A sin(x)/x, I/V ... do I get this right - Thorsten 15:57:00 03/09/02 (0)

Re: TDA1541A sin(x)/x, I/V ... do I get this right - JRR 20:20:14 03/08/02 (1)

Re: TDA1541A sin(x)/x, I/V ... do I get this right - Thorsten 04:38:28 03/09/02 (0)

Re: TDA1541A sin(x)/x, I/V ... do I get this right - Thorsten 11:09:31 03/08/02 (0)

Follow Ups

Re: Ahhhhh!! - Elso Kwak 12:29:28 03/13/02 (3)

changed to resistor i/v now... - MBK 09:23:52 03/14/02 (0)

Re: Ahhhhh!! - MBK 02:06:17 03/14/02 (1)

Re: Ahhhhh!! - Elso Kwak 13:18:07 03/15/02 (0)

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