Chapter 5 is all about precision, Chapter 8 is all about noise.
In essence, you run a worst-case error analysis over your circuit. In many cases, 1% errors can be attenuated into smaller errors with good design. If you aren't careful however, then errors grow bigger instead.
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On a tangent, but somewhat related note for those software people...
The methodology is kinda similar to error analysis with Floating Point arithmetic btw. You think about where error happens, and whenever possible, try to "squash" the error instead of making it grow bigger.
All double-precision Floating Point math has an error of +/- 1 bit 53-bits over. The question is what do you do with that error, and how can you prevent it from moving up. If you do things like sort your numbers from smallest to largest (in magnitude) before adding them up, and prevent subtraction (or addition of a negative number) at all costs, you can actually make your errors smaller.
If you're not careful about the order of operations... errors grow exponentially (and even faster than that with subtraction!). On the other hand... if you are careful about things... errors shrink exponentially!
http://www.keysight.com/en/pd-1000001296%3Aepsg%3Apro-pn-344...
Chapter 5 is all about precision, Chapter 8 is all about noise.
In essence, you run a worst-case error analysis over your circuit. In many cases, 1% errors can be attenuated into smaller errors with good design. If you aren't careful however, then errors grow bigger instead.
---------
On a tangent, but somewhat related note for those software people...
The methodology is kinda similar to error analysis with Floating Point arithmetic btw. You think about where error happens, and whenever possible, try to "squash" the error instead of making it grow bigger.
All double-precision Floating Point math has an error of +/- 1 bit 53-bits over. The question is what do you do with that error, and how can you prevent it from moving up. If you do things like sort your numbers from smallest to largest (in magnitude) before adding them up, and prevent subtraction (or addition of a negative number) at all costs, you can actually make your errors smaller.
If you're not careful about the order of operations... errors grow exponentially (and even faster than that with subtraction!). On the other hand... if you are careful about things... errors shrink exponentially!