Bit Extraction - Simulink

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Colin Ross
Colin Ross 2016-4-21
I am attempting what should be a simple task. I would like to send a sine wave through a 9-bit analog-to-digital converter (ADC) and extract the output bits. Specifically I would like to extract the first 3 bits into one "channel", the middle 3 into a separate channel, and finally the last 3 into another. I will then use these bits to create a representative pulse (e.g. if the first 3 bits are 111, then I will create a pulse that takes on the value one for a specified period. If they are 000, then the pulse will have value 0.) I have attempted using the "Extract Bits" block as shown in the attached image, however I run into an overflow error. Can anyone suggest how to fix this issue or mitigate it using an alternative technique? Thank you.

回答(1 个)

Nikhil Vyas
Nikhil Vyas 2016-4-25
You can use the Bit Slice block instead of Extract Bits to achieve the same. Something like this:
To replicate the above example, make sure to set the datatype for the constant block to something more than 8-bit since you need 9 bits. Just saying. :)
  2 个评论
Colin Ross
Colin Ross 2016-4-26
Great, thank you! This works nicely.
abdulrahim evli
abdulrahim evli 2021-4-21
Can I convert to extracted bits to integer? With Bit to Integer to blok cant achieve this because extracted bits are vector

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