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Comparator help (LmN) – Electrical Engineering Stack Exchange
My wiring diagram looks similar to this picture I created in LTspice. After I get my desired voltage out of my Comparator, how do I stabilize it so that I can use it on a load?
Post as a guest Name. For a better handle on what’s going on with an LM, take a a look at the data sheetparticularly at Figure 3.
Steve G 4, 1 7 Comparator help LmN Ask Question. I looked over the datasheet for 3 days and didn’t see the typical application.
LMN Datasheet(PDF) – NXP Semiconductors, Low power dual voltage comparator
In general, inputs come from the left and the top of the drawing, and outputs go out the bottom and the right, kinda like this, after adding the pullup to the comparator’s output: Sign up using Facebook. However, when I check the output the resulting voltage is 0v.
Thank you for pointing this out and I will go back over the datasheet to datahseet a better understanding of how to read it. Matthew Tubbs 5 1.
If you have a new question relating to a car horn, you should ask it separately. I am using a LMN to learn about comparators. Unfortunately, that ohm pullup I showed is more than likely causing the problem, and it should be more like 10k for an LM Left click on the graphic to make it go full-screen and, by the way, here’s the LTspice circuit list just datashet case you want to play with the circuit s: You’ll never get 0V out with GND equal to zero volts, no matter what, because of the saturation resistance of the comparator’s output transistor.
Why is this happening. You need a pullup resistor. dafasheet
The LM has an open-collector output. Reading the datasheet would have quickly cleared this up, there’s even a nice “typical application” schematic. Sign up using Email and Password.
Can anyone help me come up with ideas to try and get this working? In general, inputs come from the left and the top of the drawing, and outputs go out the bottom and the right, kinda like this, after adding the pullup to the comparator’s output:.
You might want to try making your drawings easier to read, since that makes it much easier for us to follow the circuit’s ins and outs. Since your original daasheet has been dealt with to your satisfaction, it’s done with. Home Questions Tags Users Unanswered.