741 as a comparator - Electronic Circuits Projects Diagrams Free

4electros · 22nd October 2005, 07:46 PM

I want to ask if 741 op-amp works as a comparator?! I know that it works as amplifier and for offset DC voltage...
please help!!

thanks in advance!

Dr.EM · 22nd October 2005, 08:05 PM

I'm fairly sure that it does

Oznog · 22nd October 2005, 08:05 PM

It can but you need to take a look at op-amp parameters. One is if the high and low output voltages meet your needs. Another is if the op amp has acceptable saturation recovery characteristics- some need a brief period to recover once the output has been driven to the positive or negative rail.

**Nigel Goodwin** · 22nd October 2005, 08:12 PM

Quote:

Originally Posted by 4electros

I want to ask if 741 op-amp works as a comparator?! I know that it works as amplifier and for offset DC voltage...
please help!!

Yes, it's a common use of a 741 - although a LOT depends what you want to do with it?, a chip designed as a comparator will be a great deal faster, but a 741 is more than good enough for most purposes.

4electros · 22nd October 2005, 08:18 PM

Quote:

Originally Posted by Nigel Goodwin

Yes, it's a common use of a 741 - although a LOT depends what you want to do with it?, a chip designed as a comparator will be a great deal faster, but a 741 is more than good enough for most purposes.

Is the 741 has delay time when toggling from (+Vcc saturation) to (-Vcc saturation)...?
could you please tell me more about the characteristics of this operaitonal amplifier, if that's possible!

Thanks in advance!

**Nigel Goodwin** · 22nd October 2005, 08:21 PM

Quote:

Originally Posted by 4electros

Quote:

Originally Posted by Nigel Goodwin

Yes, it's a common use of a 741 - although a LOT depends what you want to do with it?, a chip designed as a comparator will be a great deal faster, but a 741 is more than good enough for most purposes.

Is the 741 has delay time when toggling from (+Vcc saturation) to (-Vcc saturation)...?
could you please tell me more about the characteristics of this operaitonal amplifier, if that's possible!

Have a look at http://www.uoguelph.ca/~antoon/gadgets/741/741.html for plenty of information. As I asked before, what are you wanting to do with it?, and for that matter - why use such an old low spec opamp?, unless you have a bucket full of them? :lol:

baftab · 22nd October 2005, 09:05 PM

yeh it can be
as a comparator as well as a window comparator

hav used them in my university's lab
nigel is right...he is always right

use an ic DESIGNED as a comparator...
it'll give u a better result

4electros · 22nd October 2005, 09:45 PM

Quote:

Originally Posted by Nigel Goodwin

Have a look at http://www.uoguelph.ca/~antoon/gadgets/741/741.html for plenty of information. As I asked before, what are you wanting to do with it?, and for that matter - why use such an old low spec opamp?, unless you have a bucket full of them? :lol:

for this:
http://www.seas.upenn.edu/~ee205/Labs97S/Lab7/Lab7.html

**Nigel Goodwin** · 22nd October 2005, 09:53 PM

Quote:

Originally Posted by 4electros

Quote:

Originally Posted by Nigel Goodwin

Have a look at http://www.uoguelph.ca/~antoon/gadgets/741/741.html for plenty of information. As I asked before, what are you wanting to do with it?, and for that matter - why use such an old low spec opamp?, unless you have a bucket full of them? :lol:

for this:
http://www.seas.upenn.edu/~ee205/Labs97S/Lab7/Lab7.html

For that ANYTHING would be OK, you could probably do it with clockwork :lol:

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

22nd October 2005, 07:46 PM	(permalink)
4electros	741 as a comparator I want to ask if 741 op-amp works as a comparator?! I know that it works as amplifier and for offset DC voltage... please help!! thanks in advance! __________________ Tourism in syria website: http:///www.syriatourism.org

22nd October 2005, 08:05 PM	(permalink)
Dr.EM	I'm fairly sure that it does __________________ Angry!? I'm absolutely electrolytic! Will have to make do with myspace now I guess...

22nd October 2005, 08:05 PM	(permalink)
Oznog	It can but you need to take a look at op-amp parameters. One is if the high and low output voltages meet your needs. Another is if the op amp has acceptable saturation recovery characteristics- some need a brief period to recover once the output has been driven to the positive or negative rail. __________________ I thought what I'd do was I'd pretend I was one of those deaf-mutes.

22nd October 2005, 09:05 PM	(permalink)
baftab	yeh it can be as a comparator as well as a window comparator hav used them in my university's lab nigel is right...he is always right use an ic DESIGNED as a comparator... it'll give u a better result