# digital to frequency converter.

Discussion in 'The Projects Forum' started by Dimpi, Oct 11, 2013.

1. ### Dimpi Thread Starter Member

Sep 6, 2013
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Hi all.

For a digital to frequency converter,please tell me the frequency at which its works.is there any internal architecture of digital to frequency converter??

the pdf attached is a IC used in my 3-phse energy meter.i want to know the procedure for finding the frequency output from the IC if the power consumed is 1KWH.Please help.

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Aug 21, 2008
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3. ### Dimpi Thread Starter Member

Sep 6, 2013
96
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the link u gave is not opening..

can u please tell me the procedure to calculate the exact frequency using this IC (attached in pdf format)from a power consumption of 1KWH...
By seeing the functional block diagram i can found out the output of LPF to be varying from 6.1to 9HZ(if i am correct).then wat to do nxt??

Last edited: Oct 11, 2013
4. ### Alec_t AAC Fanatic!

Sep 17, 2013
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Why have you got two threads asking the same question? That IC doesn't have a fixed relation between pulse rate and kWh.

5. ### Dimpi Thread Starter Member

Sep 6, 2013
96
0
w

so how to decide the frequency of the output which is to be applied at the microcontroller(neuvoton N79E844AWG)which m using in my project Energy meter??please elaborate.

6. ### Alec_t AAC Fanatic!

Sep 17, 2013
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You have to do a calibration run with known power-consuming loads.

7. ### DickCappels Moderator

Aug 21, 2008
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The phase-locked loop is not what you need, I thought you just wanted to multiply or divide a frequency. This appears to be a thread about power conversion.

8. ### MrChips Moderator

Oct 2, 2009
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I don't know what is a digital to frequency converter.

If you wish to measure frequency there are two ways of doing that.

1) You can count the number of transitions occurring within a fixed time interval.

2) You can measure the time interval between successive transitions.

9. ### shteii01 AAC Fanatic!

Feb 19, 2010
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In my software radio class we had a topic of DDS. Direct Digital Synthesis. You use digital system to create analog sine wave.

10. ### MrChips Moderator

Oct 2, 2009
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Hah! So the op wants a DDS or a digital frequency synthesizer. Then he needs a binary rate multiplier and a PLL (phase-locked loop).