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KCC's quizzes AQQ260 about a technical article correction

1. Quote of the week: "No man goes before his time - unless the boss leaves early" - Groucho Marx

             

2. New quiz AQQ260 about a technical article correction

One (external) reader has noticed a mistake or imprecision in an ADI technical article:

https://www.analog.com/en/resources/technical-articles/adc-architectures.html

 The “faulty” section is displayed here below (note the BU is checking this for a coming quick update):

Questions:

  1. What and where is the error or imprecision?
  2. How would you correct it?

Good luck! And try to be among the firsts!

Kuo-Chang

P.S. Don't hesitate to share those weekly quizzes in EZ to colleagues or friends!

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  • If Tint=R*C, then ref time is Tref=Tint*Vref/Vin.
    Time is not proportional but inversely proportional to Vin.

    (And maybe a small note, the voltage is not integrated, but here the current is integrated, which depends on Vin)

  • Sure  , you have found the main mistake which is Tint is not proportional to Vin. Then you can say, as corrective action, to correct the text, it's inversely proportional to Vin. But our problem is not solved: as it is now, the circuit cannot work as a single-slope ADC! Something must be corrected in the circuit as well (and not only the text)!

Reply
  • Sure  , you have found the main mistake which is Tint is not proportional to Vin. Then you can say, as corrective action, to correct the text, it's inversely proportional to Vin. But our problem is not solved: as it is now, the circuit cannot work as a single-slope ADC! Something must be corrected in the circuit as well (and not only the text)!

Children