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mym786
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Homework Statement
The Analog-To-Digital Converter “ADC” system shown in Fig. 1 uses 1 MHZ clock generator and a ramp voltage that increases from 0V to 1.25 V in a time 125 ms.
Determine the number of clock pulses counted into the register
when Vi=0.9 V
and when it is 0.75 V
Homework Equations
The Attempt at a Solution
VR = 1.25 v TR =125 ms
Vi=0.9 V
t1= tr/Vr * Vi = 125ms *0.9 V / 1.25 V = 90 ms
T= 1/f = 1/ 1 Mz = 1μs
N = t1 / T = 90 ms / 1 μs =900
Vi=0.75 V
t1= tr/Vr * Vi = 125 ms *0.75 V / 1.25 V = 75 ms
N = t1 / T = 75 ms / 1 μs =750*
This is the solution of the problem by my prof. My question why N = 90ms/1μs = 900 and NOT 90000 ? The same goes for 750.
Thank you very much.