正弦信号输入ADC每一位输出数字码怎么确定
时间：10-02
整理：3721RD
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如果给ADC输入加一个正弦波，我想知道ADC输出每一位的数字码是怎样变化的，这个可以吗?有没有关于ADC输出各位的时域的表达式啊?
A close-form lookup table is not possible.
For example,
Input frequency = 2.19532 MHz
Sampling frequency = 50 MHz
Sampling frequency is not an integer multiple of the input frequency, so the output digital code will not repeat in short period of time.
Using a spreadsheet or a script from a high-level language with a control equation to generate the 0/1 outputs is usually the reasonable approach.
Yes, of course.
Is MATLAB script OK for you?
我没有用MATLAB啊，就是想知道输出各位的数字码是怎样变化的，有没有一些时域抑或频域的表达式
我想分析DAC电流源随机误差对于SFDR的影响，于是想知道ADC输入正弦信号输出各位的变化。
The digital outputs are function of the following paramters:
- Input frequency
- Amplitude of input sinasoidal
- DC offset of sinasoidal
- Quantization level
- Sampling frequency
A close-form lookup table is not possible.
For example,
Input frequency = 2.19532 MHz
Sampling frequency = 50 MHz
Sampling frequency is not an integer multiple of the input frequency, so the output digital code will not repeat in short period of time.
Using a spreadsheet or a script from a high-level language with a control equation to generate the 0/1 outputs is usually the reasonable approach.
ahdlLib里面有理想ADC可以用来仿真
Normally such an analysis is conducted in MATLAB script.
恩，谢谢啦，我再研究研究