What will happen if an analog signal is passed through a DAC?

[GreenXenon]

Hi:

What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?


Thanks

 

[David L. Jones]

Hi:

What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?

Simulate it, it'll keep you occupied for hours.

And if you wait long enough, like several universe lifetimes, the DAC will
spotaneously turn into an ADC.
Maxim make them, you can get free samples.

Dave.

 

[Varactor]

Hi:

What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?

Thanks

I assume you mean the AC signal is applied to the DAC resistor chain
and you are using the current output DAC as a digital resistor? I see
no obvious problem with that...

Cheers

 

[GreenXenon]

Hi:

What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?

Assuming you are talking about a multiplying DAC,
you will essentially have a digital volume control
for the analog signal. The problem is that it
will have a linear control range, not a
logarithmic ("audio taper") range.

To do this, you use the analog signal as the
reference voltage of the DAC. Note that not all
DACs (and not even all multiplying DACs) can
handle a bipolar reference. If yours can't, you
just need to add the appropriate offset (and
subtract afterwards), or AC-couple the signal and
sum it with the normal reference so that the sum
runs between 0 and the positive supply.

Best regards,

Bob Masta

DAQARTA v4.51
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Scope, Spectrum, Spectrogram, Sound Level Meter
FREE Signal Generator
Science with your sound card!

Lets say the analog signal is plotted on a graph two times, once
before passing through the DAC and once after -- how will the two
graphs differ?

A DAC is not meant to receive analog signal, so I suspect something
weird and interesting might occur.

 

[Jamie]

Hi:

What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?


Thanks

Is that a trick question ?

http://webpages.charter.net/jamie_5"

 

[Sjouke Burry]

Hi:

What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?


Thanks

Is that a trick question ?

http://webpages.charter.net/jamie_5"

No, its a well known troll, formerly radium.

 

[GreenXenon]

On Wed, 4 Mar 2009 15:01:13 -0800 (PST), GreenXenon

On Mar 4, 6:11 am, [email protected] (Bob Masta) wrote:

Hi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
Assuming you are talking about a multiplying DAC,
you will essentially have a digital volume control
for the analog signal. The problem is that it
will have a linear control range, not a
logarithmic ("audio taper") range.
To do this, you use the analog signal as the
reference voltage of the DAC. Note that not all
DACs (and not even all multiplying DACs) can
handle a bipolar reference. If yours can't, you
just need to add the appropriate offset (and
subtract afterwards), or AC-couple the signal and
sum it with the normal reference so that the sum
runs between 0 and the positive supply.
Best regards,
Bob Masta
DAQARTA v4.51
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Scope, Spectrum, Spectrogram, Sound Level Meter
FREE Signal Generator
Science with your sound card!

Lets say the analog signal is plotted on a graph two times, once
before passing through the DAC and once after -- how will the two
graphs differ?

So the frequency and phase of both signals will be the same?

---
Yes, it is. The reference input.

Are you trolling again?
---




Not at all weird, but quite interesting in that the DAC acts like a
digital attenuator.

So the analog signal's peak-to-peak amplitude will decrease after
being passed through the DAC?

Here's as good a place as any to start your pilgrimage:

http://hyperphysics.phy-astr.gsu.edu/hbase/Electronic/dac.html#c3

Google "R-2R ladder" for further enlightenment.

JF

Thanks

 

[krw]

On Wed, 4 Mar 2009 15:01:13 -0800 (PST), GreenXenon

On Mar 4, 6:11 am, [email protected] (Bob Masta) wrote:

GreenXenon <[email protected]> wrote:

Hi:

What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?

Assuming you are talking about a multiplying DAC,
you will essentially have a digital volume control
for the analog signal. The problem is that it
will have a linear control range, not a
logarithmic ("audio taper") range.

To do this, you use the analog signal as the
reference voltage of the DAC. Note that not all
DACs (and not even all multiplying DACs) can
handle a bipolar reference. If yours can't, you
just need to add the appropriate offset (and
subtract afterwards), or AC-couple the signal and
sum it with the normal reference so that the sum
runs between 0 and the positive supply.

Best regards,

Bob Masta

DAQARTA v4.51
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Scope, Spectrum, Spectrogram, Sound Level Meter
FREE Signal Generator
Science with your sound card!

Lets say the analog signal is plotted on a graph two times, once
before passing through the DAC and once after -- how will the two
graphs differ?

So the frequency and phase of both signals will be the same?

---
Yes, it is. The reference input.

Are you trolling again?
---




Not at all weird, but quite interesting in that the DAC acts like a
digital attenuator.

A.K.A. Multiplying DAC

So the analog signal's peak-to-peak amplitude will decrease after
being passed through the DAC?

Yes, multiplied by the DAC setting.
Or "Multiplying A/D Converter"

 

[krw]

Or "Multiplying A/D Converter"

Sorry, "Multiplying D/A Converter"

 

[Jamie]

GreenXenon wrote:

Hi:

What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?


Thanks

Is that a trick question ?

No, and if you knew what you claim about electronics you would know
that it works, and the limitations.

You know, You are a complete asshole !...

One should question as to who really knows what they are doing.


You must of wasted a lot of employers money over the years, you
wouldn't last long where I work.


http://webpages.charter.net/jamie_5"

 

[[email protected]]

Hi:

What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?

Thanks

You will alert the MAN and his agents will come and shoot you down and
trample over your carcass.

Any other questions moron?