Author Topic: [English] Antonym of Analog Front End  (Read 2099 times)

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Offline blueskull

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[English] Antonym of Analog Front End
« on: December 29, 2017, 08:49:03 am »
Circuit for conditioning signal before ADC is called AFE, what is it called if a collection of circuitry is used to post-process DAC signals (IVC, LPF, PGA, etc.)? A search on Google for analog back end doesn't result much useful information, so I wonder what is it called.
 

Online borjam

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Re: [English] Antonym of Analog Front End
« Reply #1 on: December 29, 2017, 08:54:48 am »
 

Offline blueskull

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Re: [English] Antonym of Analog Front End
« Reply #2 on: December 29, 2017, 08:57:07 am »
Reconstruction filter?

https://en.wikipedia.org/wiki/Reconstruction_filter

I mean the entire collection of IVC, LPF, PGA, etc., not just the LPF.
Just like an AFE which has LNA/PGA, LPF and ADC driver.
 

Online AndyC_772

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Re: [English] Antonym of Analog Front End
« Reply #3 on: December 29, 2017, 09:10:44 am »
Output stage?

Offline blueskull

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Re: [English] Antonym of Analog Front End
« Reply #4 on: December 29, 2017, 09:17:39 am »
 

Online borjam

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Re: [English] Antonym of Analog Front End
« Reply #5 on: December 29, 2017, 10:24:28 am »
Output stage?

Candidate 1

The proper term will depend on what you wish to communicate. The reconstruction filter is mandatory, hence its
"special" name instead of "low pass filter". The rest of the elements can be necessary or not, depending on your needs.

In case you don't want to deal just with the mandatory function I also vote for "output stage"-


 

Online rsjsouza

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Re: [English] Antonym of Analog Front End
« Reply #6 on: December 29, 2017, 02:42:08 pm »
Output stage?

Candidate 1
In portuguese I have used the term "analog rear end" to generically define the analog circuitry at the system's rear end stage. However, this may not be quite true in english, thus I suspect "output stage" may be more usual.
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Online rhb

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Re: [English] Antonym of Analog Front End
« Reply #7 on: December 30, 2017, 01:23:35 am »
Analog Back End?

The maddening thing about English is it's logical, *if and only if* you have a comprehensive understanding of every human language. the English borrowed from everything and Americans have continued the practice.
 

Offline blueskull

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Re: [English] Antonym of Analog Front End
« Reply #8 on: December 30, 2017, 01:42:35 am »
Here are a bit more background:

First of all, this is marketing requirement. The product under work is an audiophile DAC (hence marketing requirement).
My approach is to design everything from scratch, down to digital receiver, interpolation, SDM, output elements and LPF.

Apparently I'm not going to spend $$$ to design my own DSP ASIC, that will be implemented on a chipset of ESP32+BF706+iCE40HX8K.
The ESP32 handles WiFi/Ethernet receiving, UDP protocol and FEC with a proprietary FEC encoding designed for audio.
The BF706 handles USB receiving, input buffering, interpolation, effects and DDS/DPLL for synchronous mode.
The FPGA handles SDM, inter symbolic interference mitigation and line encoding. The encoded signal goes to the output section.
The interesting part is the output element, which is a 4-bit thermometer code high speed DAC with IVC, LPF and amplifier.

Now, just like most ultra high end audio BS (think of those eye candy $5000+ audio gears), visual appearance is important.
My approach here is to encapsulate my DAC element into a small module that looks like a chip with sexy metal lid, imagine a quarter of an LGA CPU (40mm*10mm).

I need a name for this module, an abbreviation that I can use in my marketing material. Personally I prefer analog front end, but I'm afraid the "front" may cause misunderstanding.
What I need is a common abbreviation (like AFE, LPF, PGA) that everyone travelling in this circle knows, so it looks professional, not something that I made up just for the show.

Hope this explanation can let you guys know what I'm after.
 

Online BrianHG

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Re: [English] Antonym of Analog Front End
« Reply #9 on: December 30, 2017, 05:42:23 am »
Since the audio DAC's used to be all current out, I used to use the basic term 'IV stage' to represent everything, current to voltage amp and sin(x)/x filtering and reconstruction and analog line driver.  Or, output buffer.

Since you are dealing with audio, maybe you should ask as 'diyaudio' in this sub-forum:
http://www.diyaudio.com/forums/digital-line-level/

They are better suited for the term you may be looking for rather than us specific technical engineering guys...
« Last Edit: December 30, 2017, 05:46:11 am by BrianHG »
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Offline blueskull

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Re: [English] Antonym of Analog Front End
« Reply #10 on: December 30, 2017, 05:52:28 am »
They are better suited for the term you may be looking for rather than us specific technical engineering guys...

Actually they have some very technically knowledgeable people there. Check out this Dutch gentleman, MarcelvdG here:
http://www.diyaudio.com/forums/pc-based/315853-ideas-usb-dac-product.html
 

Online BrianHG

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Re: [English] Antonym of Analog Front End
« Reply #11 on: December 30, 2017, 05:57:56 am »
They are better suited for the term you may be looking for rather than us specific technical engineering guys...

Actually they have some very technically knowledgeable people there. Check out this Dutch gentleman, MarcelvdG here:
http://www.diyaudio.com/forums/pc-based/315853-ideas-usb-dac-product.html
Ok, you kinda missed my meaning.  I meant to say you are looking to access knowledge from those with the type of 'terminology' to sell a premium audio device which many of us here (not necessarily me) which you need to use to get the high $ which your design deserves.  I assume part of what you are looking for is also how to market to the high $ crowd.

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Online rhb

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Re: [English] Antonym of Analog Front End
« Reply #12 on: December 30, 2017, 02:47:45 pm »
The audiofool crowd will have heard of an "analog front end", so calling it an "analog back end" will be sufficiently intelligible to them.  Then add some BS about reconstruction accuracy, etc.  "Digital Processing Analog Back End" should be plenty of smoke and mirrors once marketing describes its virtues.
 

Offline nfmax

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Re: [English] Antonym of Analog Front End
« Reply #13 on: December 30, 2017, 10:09:21 pm »
How about "analog reconstruction engine"?

It is actually a correct functional description, without committing yourself to anything definite, and it sounds good  ;D
 
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Online Gribo

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Re: [English] Antonym of Analog Front End
« Reply #14 on: December 31, 2017, 01:18:12 am »
Audio Reconstruction Signal Engine.
I am available for freelance work.
 

Offline Macbeth

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Re: [English] Antonym of Analog Front End
« Reply #15 on: December 31, 2017, 01:29:10 am »
DBS - Digital Back Start. Perfect antonym, and confusering enough to audiophools, it just confused me. :palm:
 
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Online BrianHG

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Re: [English] Antonym of Analog Front End
« Reply #16 on: December 31, 2017, 08:31:09 am »
Ok, a term you can use which no one else is using + a good marketing and brochure text for a premium audio device which you can trustfully say it's true, and no one else is using the term.  Though, your output filter better have at least 1 inductor in series in it to be true...

Gaussian Analog Filter
or
Gaussian Analog Interpreter
or
Gaussian Analog Interpreting Filter
or
Gaussian Analog Reconstruction Filter

You can exclusively use this term to separate you from everyone else.
« Last Edit: December 31, 2017, 08:32:40 am by BrianHG »
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Offline JacobPilsen

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Re: [English] Antonym of Analog Front End
« Reply #17 on: December 31, 2017, 10:37:32 pm »
Digital back start ???
« Last Edit: December 31, 2017, 10:40:44 pm by JacobPilsen »
 

Offline blueskull

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Re: [English] Antonym of Analog Front End
« Reply #18 on: December 31, 2017, 11:26:43 pm »
I think for the moment I will call it mixed signal engine or just AFE.
 


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