Comparator practice problems
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Read the Comparator class notes.
For the comparator shown,
- Ra = 5.6 kΩ
 - Rb = 6.8 kΩ
 - Vref = 0 V
 

The upper output voltage limit of the op amp is VL+ = 3.3 V, and the lower limit is VL- = -3.3 V.
Find VTH, VTL, and the hysteresis width for the comparator.