# doubt

Discussion in 'General Electronics Chat' started by diwa2000@gmail.com, Jun 15, 2008.

1. ### diwa2000@gmail.com Thread Starter Active Member

Apr 15, 2008
40
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can a comparator read the out form the integrator circuit....the output of which is a negative voltage ramp.... and compare that with a reference voltage. Geneally whats the output of a comparator ...is it only high(+5V) or low(0V)... or anything else also.
Thanks

2. ### hgmjr Retired Moderator

Jan 28, 2005
9,029
219
Here is the material covering comparators in the AAC ebook.

hgmjr

Apr 5, 2008
19,799
4,107
Hello,

The input and output of a comparator depend also on the powersupply.
If a comparator is connected to a powersupply that gives say +15 Volt for the positiv powersupply and -15 Volts for the negativ powersupply, than the output will swing between + 15 Volt and -15 Volt, depending on the inputs.
The reference voltage may be negativ in this case.

Greetings,
Bertus

4. ### mik3 Senior Member

Feb 4, 2008
4,846
70
Yes you can do it. Your comparator's output will swing between the two extreme voltages of your power supply. Thus, if you have a single supply (eg. 0-15 V) the output will rise to nearly 15 if the non-inverting input is more positive than the inverting input and to near 0 if the opposite happens. If you have a bipolar supply (eg. 15-0-(-15)) your output will go to near 15 if the non-inverting input is more positive than the inverting input and to near -15 if the opposite happens.

Apr 15, 2008
40
0
thanks mik3