Noninverting Configuration With Hysteresis-Clarifications required

Thread Starter

hoyyoth

Joined Mar 21, 2020
126
Dear Team,
I need some clarifications for a non-inverting comparator design. I am using TLV7031 from TI.The circuit configuration is given as shown.
In the datasheet it is given as " When VIN is low, the output is also low. For the output to switch from low to high, VIN must rise to VIN1 ".
This is shown in the rectangle with red color.
My question is,
Why R2 is connected to GND but, they says VIN1 represents high threshold.Then the other end of R2 shoud be VCC?May I know where I went wrong.
Regards
HARI
1619611922355.png
 

ericgibbs

Joined Jan 29, 2010
13,665
Hi hoy,
Consider when Vo is Low=0V, this means that the junction of R1 and R2 has been pulled lower by Vo being low, So the Vin1 has to rise much higher in order for the R1 R2 junction to exceed the Vref voltage,

E

Update;
Does this simulation help.?
 

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