Timeline for Simulating a comparator circuit
Current License: CC BY-SA 3.0
21 events
when toggle format | what | by | license | comment | |
---|---|---|---|---|---|
Apr 13, 2017 at 12:32 | history | edited | CommunityBot |
replaced http://electronics.stackexchange.com/ with https://electronics.stackexchange.com/
|
|
Dec 31, 2016 at 6:25 | answer | added | Ken Shirriff | timeline score: 2 | |
Dec 31, 2016 at 6:18 | vote | accept | Kar | ||
Dec 31, 2016 at 6:18 | comment | added | Kar | @KenShirriff You're right! Do you know why this happens without voltage rails? | |
Dec 31, 2016 at 6:05 | comment | added | Ken Shirriff | Try using an "op amp with voltage rails". I tried an op amp as a comparator in CircuitLab without rails, and it goes to +/- 60V as in your second diagram. | |
Dec 31, 2016 at 5:53 | answer | added | Rohat Kılıç | timeline score: 1 | |
Dec 31, 2016 at 5:53 | comment | added | Kar | @PeterBennett The amplitude of the input is 5V. I'm measuring at the output of the LM339. | |
Dec 31, 2016 at 5:50 | history | edited | Kar | CC BY-SA 3.0 |
added 25 characters in body
|
Dec 31, 2016 at 5:47 | comment | added | Peter Bennett | You now have reasonable timing, so you can see what's happening. What is the amplitude of the input signal, and where do you measure that 100 V p-p signal? | |
Dec 31, 2016 at 5:36 | comment | added | Kar | @KenShirriff I'm using CircuitLab. I just made some changes to this circuit (I can't save mine without a subscription!). | |
Dec 31, 2016 at 5:35 | comment | added | Ken Shirriff | What simulator are you using? Do you have power connected to the op amp? | |
Dec 31, 2016 at 5:35 | history | edited | Kar | CC BY-SA 3.0 |
added 128 characters in body
|
Dec 31, 2016 at 5:28 | history | edited | Kar | CC BY-SA 3.0 |
added 5 characters in body
|
Dec 31, 2016 at 5:23 | comment | added | Kar | @PeterBennett I've now tried 0.1ms steps over 10ms. Please see update. | |
Dec 31, 2016 at 5:23 | history | edited | Kar | CC BY-SA 3.0 |
added 5 characters in body
|
Dec 31, 2016 at 5:21 | comment | added | Peter Bennett | You need to sample a few times per cycle - perhaps 0.1 mS would work. Then set the graph to show just a few cycles per square - perhaps 5 mS per square would show something useful. | |
Dec 31, 2016 at 5:21 | history | edited | Kar | CC BY-SA 3.0 |
deleted 4 characters in body
|
Dec 31, 2016 at 5:17 | comment | added | Kar | @PeterBennett Granted, I've now set the stop time to 1 and a 1ms step. The output is still not a square wave though. Please see edit. | |
Dec 31, 2016 at 5:14 | history | edited | Kar | CC BY-SA 3.0 |
added 230 characters in body
|
Dec 31, 2016 at 5:10 | comment | added | Peter Bennett | If I'm reading things correctly, your signal is 1 KHz - one cycle per millisecond, but you are only sampling every 10 mS. The vertical lines on the graph are 500 mS apart, so you should get 500 cycles per square - pretty hard to see anything useful. | |
Dec 31, 2016 at 4:55 | history | asked | Kar | CC BY-SA 3.0 |