Schmitt Trigger using 741

[rajultra]

Hello sir :)

This is my very first post here !

With this first post i want to know about a proper circuit diagram for schmitt trigger using 741 IC or if there is any other better option please tell ?

thanks :smile:

[Archangel]

Here is a link which has a schematic very close to what you ask for using an Op Amp & an inverter to achieve what a "comparator" will do.
http://www.dakeng.com/threading.html

[rajultra]

Here is a link which has a schematic very close to what you ask for using an Op Amp & an inverter to achieve what a "comparator" will do.
http://www.dakeng.com/threading.html


okk thanks sir :) let me proceed on it first then i ll continue on this post . . thanks a lot :o

Please let me know too if there exist any link other than this ?

[Bartchou]

Please let me know too if there exist any link other than this ?

http://www.dz3w.com/foreign/design/10062.html
I hope this link is helpful for you.

[Charlie]

You really should buy a Schmitt trigger device. An op-amp like a 741 does not have sufficient gain bandwidth product to be extremely fast, no matter what you glue around it. A proper Schmitt trigger device has internal architecture designed to transition states quickly, and does not need to worry about noise the way linear devices need to.

[rajultra]

You really should buy a Schmitt trigger device. An op-amp like a 741 does not have sufficient gain bandwidth product to be extremely fast, no matter what you glue around it. A proper Schmitt trigger device has internal architecture designed to transition states quickly, and does not need to worry about noise the way linear devices need to.

ooo i see , i guessed once about it but now i am seeing it as a truth . . well how to obtain a schmitt trigger device ? is it an I.C. or any circuitry ? i need a very pure result :) thanks for support please reply . .

[Charlie]

There are hundreds to choose from. Go to any manufacturer or distributor site and search. Here is only 1 example - there are likely better choices for your application.
http://www.semicon.toshiba.co.jp/info/docget.jsp?pid=TC7SH17F&lang=en&type=datasheet

[Art]

If it’s for hobby 74132 might be ready available.
Tie one input of a NAND high, and use the other as the Schmidt trigger input.