how to simulate ADC through matlab code

Hi,

Suggest matlab code for simulating high speed ADC's and DAC's.

regards,

srinivas

[Dimitris Kalogiros]

Be more specific about "high speed"

Are you trying to simulate the quantization noise o a ADC/DAC or (in addition) some other impairments?

[Durga srinivasu Jarajapu]

Yes I want to simulate all paramers of ADC's and DAC's

Answer 1

[Evangelos Denaxas]

You can try to use "fi" objects that encode fixed-point behavior and hence ADC/DAC natively.

https://www.mathworks.com/company/newsletters/articles/best-practices-for-converting-matlab-code-to-fixed-point.html?s_tid=answers_rc2-3_p6_Topic

Answer 2

[po-wei huang]

You can try this sample in which both ADC/DAC is provided.

https://poweidsplearningpath.blogspot.com/2020/04/ch4-adcdac-how-to-simulate-adcdac.html

Answer 3

[Idin Motedayen-Aval]

If interested in simulating architecture of ADCs and DACs, you can look at Mixed-Signal Blockset:

https://www.mathworks.com/help/msblks/data-converters.html?s_tid=CRUX_lftnav

This goes beyond just quantization and allows you to simulate different architectures for data converters and various impairments.

Answer 4

[Pragati]

If your goal is to simulate an ADC in MATLAB, it depends on the level of abstraction you want.1. Basic MATLAB (code-only) approach

At a minimum, an ADC simulation consists of three steps:

• Sampling the analog signal
• Quantization to discrete levels
• Encoding into digital values

This can be implemented using standard MATLAB operations (e.g., rounding, scaling). For example, quantization can be modeled by mapping values to 2N2^N2N levels based on the ADC resolution.

Another simple approach mentioned in the thread is using fixed-point (fi) objects, which naturally capture quantization behavior of ADC/DAC systems

The above approach only captures:

• Quantization
• Basic sampling effects

It does not model real ADC behavior, such as:

• Nonlinearity
• Jitter
• Architecture-specific effects

If you want to simulate realistic ADC behavior, use Mixed-Signal Blockset:

• Provides ADC architectures (SAR, Delta-Sigma, Flash, etc.)
• Allows modeling of impairments (noise, jitter, nonlinearity)
• Includes testbenches and measurement workflows

For example, MSB models let you simulate:

• Sampling + quantization
• Spectral performance (SNR, ENOB)
• Impact of impairments on system behavior

[Walter Roberson]

2N2^N2N

Sorry, I do not understand how that is intended to be parsed? The standard parsing of 2*N*(2^N)*2*N does not make any internal sense, and neither does 2*(N^2)^(N^(2*N))

Answer 5

[Pragati]

Sorry for the typo. I meant to say "2^N quantization level"