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Frequency to voltage converter for 6MHz

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kender

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frequency to voltage converter 10mhz

Folks,

My signal is a sine wave, which can have 2 different frequencies at different times: 3MHz and 6MHz. I need to be able to tell, which frequency it is. I would like to do this with a frequency to voltage converter (FVC). So far I could find FVC chips only for low frequencies on the order of 1MHz. Could anyone suggest an FVC chip or an FVC circuit, which would work at 6MHz?

Alternatively, I could build two band-pass filters for 3MHz and 6MHz and detect the power.

Cheers!
 

It can also be configured as FVC. Check page 8 of the datasheet.

Cheers,
FoxyRick.
 

You can also divide the high frequency and use a low frequency FVC.

Tornado
 

use low frequency...
 

You may use monostable multivibrator and average it's output signal. It is direct F->V converter.
 

kender said:
Folks,

My signal is a sine wave, which can have 2 different frequencies at different times: 3MHz and 6MHz. I need to be able to tell, which frequency it is. I would like to do this with a frequency to voltage converter (FVC). So far I could find FVC chips only for low frequencies on the order of 1MHz. Could anyone suggest an FVC chip or an FVC circuit, which would work at 6MHz?

Alternatively, I could build two band-pass filters for 3MHz and 6MHz and detect the power.

Cheers!
Click to expand...


You can reduce the frequency and then try with the available ic itself.. use a time scalar like a counter Ic.. With that you can divide the frequency.. So,you can proceed with your original available ic..
 

kender said:
Thanks. It makes sense now. However, I couldn't find a place to buy VFC110 (no wonder - it's a Burr-Brown chip).
Click to expand...

I have some from TI, as samples. Will they send to you? Also:

Farnell:
https://uk.farnell.com/jsp/endecaSe...alorder=on&Ntt=VFC110&Nty=1&N=0&Ntk=gensearch

Digikey:
https://www.digikey.com/scripts/DkSearch/dksus.dll?Criteria?Ref=8298&Site=US&Cat=34079968

Having seen the price they ask though, I think I would find a cheaper way to do what you need.

Cheers,
FoxyRick.
 

I can't take as samples from TI,why?I from china!
 

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