KCC's quizzes AQQ260 about a technical article correction

1. "The time it takes for the integrator to trip the comparator is proportional to the unknown voltage (T_INT/V_IN)". This is wrong. Also the relation T_INT∝V_IN on the right side of fig. 1b is not correct.

2. Correction: "The time it takes for the integrator to trip the comparator is inversely proportional to the unknown voltage (T_INT ∝ 1/V_IN)". And on the right side of fig. 1b we need to put T_INT ∝ 1/V_IN.

Thanks Gaetano! Indeed the error is indeed the time here is inversely proportional to Vin. OK, you propose the correction in the sentence. But the circuit, as it is, will not work as a single slope ADC! Changes must be done on the circuit for sure... Do you have an idea?

You need to swap V_IN and Vref in the circuit (and Vref needs to be negative for positive V_IN). This way the "ramp" coming out from the integrator has always the same slope and you have direct proportionality between T_INT and V_IN. 

You need to swap V_IN and Vref in the circuit (and Vref needs to be negative for positive V_IN). This way the "ramp" coming out from the integrator has always the same slope and you have direct proportionality between T_INT and V_IN. 

Bingo Gaetanao! That's the (mnimu) correction the BU has to do on that article! Congratulations!