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[#1] Parallel DAC... Hows do they work?    
今日同班發燒友吹水

見到有好多唔同嘅 d a c

裏面都會見到用parallel dac... For example 8x 1704

2x 1541

4x.1541 each channel.. Etc..


究竟佢哋係點樣運作嘅呢


Thxx

最後修改時間: 2021-03-24 17:07:07
hahayanyan
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49.xxx.xxx.32
2021-03-24 16:53
[#2] Parallel DAC... Hows do they work?    
加大電流輸出,Lite DAC-AH黑膠味dac就係用八粒TDA 1543并聯輸出
BB1668
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113.xxx.xxx.225
2021-03-24 17:08
[#3] Parallel DAC... Hows do they work?    
除咗並聯輸出

有冇其他公司用其他手段呢?
Thx for sharing
hahayanyan
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49.xxx.xxx.32
2021-03-24 17:20
[#4] Parallel DAC... Hows do they work?    

1. Depending on architecture can improve SNR (S/N ratio) since signal adds coherently and noise does not so you gain a little with each extra DAC.

2. May increase drive level from parallel outputs (again architecture-dependent)



mcc_2001
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218.xxx.xxx.114
2021-03-24 17:31
[#5] Parallel DAC... Hows do they work?    
Oh... What is that building.... 12 floor of dac?


1) how easy to ensure coherency?

2) drive level in a sense of?


Haha

Anyone is then procssing those dac output to a AD or fpga chip for some funny extraction and then pas through another 2 dac for the final stage?

最後修改時間: 2021-03-24 17:45:00
hahayanyan
個人訊息 會員
49.xxx.xxx.32
2021-03-24 17:34
[#6] Parallel DAC... Hows do they work?    
Also, this kind of building blocks can be found on old Accuphase with 16x parallel DAC. Very interesting indeed.

mcc_2001
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218.xxx.xxx.114
2021-03-24 17:45
[#7] Parallel DAC... Hows do they work?    
In theory... Is that more is better?

OH...16

Haha

最後修改時間: 2021-03-24 17:52:53
hahayanyan
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49.xxx.xxx.32
2021-03-24 17:52
[#8] Parallel DAC... Hows do they work?    
As the noise of electronic components are most likely random, therefore adding one device (including transistor, op-amp, dac... etc. ) in parallel will reduce noise by sq root 2 x N. (Ref below)

mcc_2001
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218.xxx.xxx.114
2021-03-24 18:49
[#9] Parallel DAC... Hows do they work?    
So easy to understand... With equation and diagram haha

Thx
hahayanyan
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49.xxx.xxx.32
2021-03-24 18:56
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