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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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  • The first stage integrator is inherently inverting, and thus the output (Vint) would start at zero and slope negative.  The comparator will never trip.  You could add another inversion stage (after the integrator).  Inverting the Vref would also work if you had negative supplies in the system.

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  • The first stage integrator is inherently inverting, and thus the output (Vint) would start at zero and slope negative.  The comparator will never trip.  You could add another inversion stage (after the integrator).  Inverting the Vref would also work if you had negative supplies in the system.

Children