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How I can make this sine to square wave converter accept higher frequency?

Because when I tested it, it only accepts 10KHZ max. I will need to input a higher level of frequency till 1000KHZ.

Would this mean that I need to swap the resistor values to lower values?

New to digital electronics. Would appreciate if someone could help. U1 is an Op Amp.

enter image description here

JRE
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Coolo
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    You forgot to state what U1 is. – Andy aka Apr 10 '19 at 11:56
  • Oh Oops. U1 is Op Amp. – Coolo Apr 10 '19 at 11:57
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    There are thousands of opamps, fast ones and slow ones. But you use an opamp as a comparator, you might be better off using a comparator instead. Many comparators are designed for speed and faster than many opamps. – Bimpelrekkie Apr 10 '19 at 12:07
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    That circuit has no components to intentionally limit its operating frequency. Any limit you are hitting is inherent to the opamp you are using. You need to name that opamp. Alternatively, you need to ask the question implicit in the information in the question. The better question would be "How can I build a circuit to convert sine waves to square waves at up to 1MHz?" – JRE Apr 10 '19 at 12:20
  • @JRE Ok, so do you think it'll be a good idea to post the question you have suggested and delete this post? – Coolo Apr 10 '19 at 12:31
  • What is the manufacturer's part number of op amp? – HandyHowie Apr 10 '19 at 13:19
  • There are as yet no answers. You could edit this, and ask that better question. Leave the existing stuff as an example of what you think could work. And, please finally add the part number of the opamp you were using. – JRE Apr 10 '19 at 13:24
  • @HandyHowie LM324, texas instrument – Coolo Apr 10 '19 at 13:24
  • Ah.... eventually my question was answered. Use something much faster than an LM324 is my advice. Try a MAX999 comparator. – Andy aka Apr 10 '19 at 13:50

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If you want a fast sine=>square wave converter, redo your circuit around a schmitt trigger. A 74LS part would do. Does the 4000 series have one? I don't remember. Oh yes...4093.

Robert Endl
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