• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Ideal Comparator Output/Input Limitations?

Status
Not open for further replies.

gigaJoule

New Member
Do ideal comparators swing between their power rails (-5V to 5V) in this case, or does the output only swing between 0V < V_out < 5V?

If the output can swing from -5V to 5V, that would mean this circuit would have to accept input from -5V to 5V. Can ideal comparators handle -5V input? I was looking at the LM339 spec sheet and it looks like it can only handle input from -0.3V < V_in < V_supply - 1.5V

I really appreciate any help you can offer.
 

Attachments

crutschow

Well-Known Member
Most Helpful Member
Ideal devices have no limitations so it's of little practical use to discuss their capabilities.

The LM339 can only handle an input common-mode range from -0.3V < V_in < V_supply - 1.5V as you stated. Most real comparators will only work if their input voltage is less then the supply rails, so that's not unusual.
 
Last edited:
Status
Not open for further replies.

Latest threads

EE World Online Articles

Loading
Top