Timeline for RC Frequency to Voltage Converter
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 25, 2019 at 7:09 | vote | accept | CanSevgi | ||
| Apr 28, 2019 at 17:27 | comment | added | D.A.S. | That seems like an awkward way to convert 50% d.f. into 25% d.f. over a range of f from 10 to 20kHz. Can you not think of a better way using a comparator and triangle wave? | |
| Apr 28, 2019 at 17:21 | comment | added | CanSevgi | 10V and 25us for 5V and all values between them. so that it produces 25% pulse width for every frequency if correct voltage applied) Sorry for not being clear enough, I'm new in this platform and have no experience. | |
| Apr 28, 2019 at 17:20 | comment | added | CanSevgi | No, it's linear, I'll use it for some kind of frequency lock, the output of this Frequency-to-voltage converter will be used as input voltage to monostable multi-vibrators so that they can produce similar(+-%5) frequency to incoming data. For example, the receiver takes 13kHz input and 1011 as data, the encoder will code 1 as 75% pulse width and 0 as 25% pulse width at 13kHz output signal. Input clock will trigger monostable multivibrators and Frequency-to-voltage converter output will define pulse width (there is a RC circuit that produce 12.5us pulse for ++ | |
| Apr 28, 2019 at 17:11 | comment | added | D.A.S. | So this is not a linear tach but just a digital switch for <15k or >15kHz? | |
| Apr 28, 2019 at 17:04 | comment | added | CanSevgi | In the picture bottom plot the 10kHz and 20kHz Frequency-to-voltage converter outputs converges to approx. 2.5V at approx. 1.3 ms which means 26 cycle for 20kHz and 13 cycle for 10kHz. I need both of them under 10 cycle and resolution is not very important (I mean, if i obtain 5volts for 10khz in 3 cycle and 10volts for 20khz in 6 cycle, +- 0.5 Volt is not a problem since the gap is big enough). Thank you very much for your interest ! | |
| Apr 28, 2019 at 14:43 | comment | added | D.A.S. | You did not include specs for resolution and accuracy 1%? 0.1%? 10 bit accuracy? | |
| Apr 28, 2019 at 14:31 | comment | added | CanSevgi | I gave upvote for this good answer and I'll mark it as answer if no better answer came. But the problem is I mentioned that I want to do that without any IC. Of course there are excellent solutions with different approaches (like lm2907 or lm331) but I'm trying to make it real by using primitive components like op-amps capacitor and resistors. | |
| Apr 18, 2019 at 19:19 | history | edited | D.A.S. | CC BY-SA 4.0 |
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| Apr 18, 2019 at 19:10 | history | edited | D.A.S. | CC BY-SA 4.0 |
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| Apr 18, 2019 at 18:57 | history | edited | D.A.S. | CC BY-SA 4.0 |
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| Apr 18, 2019 at 17:58 | history | answered | D.A.S. | CC BY-SA 4.0 |