Can someone tell me what does R6 in this LM358 circuit diagram do?


junki
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Can someone tell me what does R6 in this LM358 circuit diagram do?

 

image.png.787e121c1189e7885c808411afca1b2c.png

I guess R6 is part of the square wave generator that forms the b diagram. R6 accelerates the transition of the output state of the op amp through positive feedback to cross the indeterminate state, and acts as a Schmitt trigger. Guys do you agree?

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Armbian is a community driven open source project. Do you like to contribute your code?

You can plug the circuit in some simulator (like falstad.com, LTSpice or similar) to check what the parameters do. 

I did that for you here: https://tinyurl.com/yemxbzmt  As you guessed R6 in combination with LM358 B does work as a schmitt trigger.

 

See also this circuit with just the B half. https://tinyurl.com/yehg4ooh

 

The exact size of R6 probably does not matter all that much.

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12 hours ago, Heisath said:

You can plug the circuit in some simulator (like falstad.com, LTSpice or similar) to check what the parameters do. 

I did that for you here: https://tinyurl.com/yemxbzmt  As you guessed R6 in combination with LM358 B does work as a schmitt trigger.

 

See also this circuit with just the B half. https://tinyurl.com/yehg4ooh

 

The exact size of R6 probably does not matter all that much.

Thank you for leaving this suggestion as I can try to plug the circuit in some simulator!!!

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