I want to transform the LVPECL output of the clock synthesiser IC for generating a sine wave signal.
IS there any dedicated ICs which accepts LVPECL inputs and outputs sine wave.
Yes, this is essentially what I was talking about doing with the DAC out of the DDS. We use a bal-un to a reconstruction filter (bandpass filter) to isolate the fundamental. You can do this with an LVPECL signal, but there will be more power in the harmonics, which results in the need for a higher order bandpass filter for greater attenuation or the resulting sine wave will have greater distortion.
You would want to use the output of a DDS with a reconstruction filter to produce a sine wave. If you use the AD9548, you can drive the reference input with an LVPECL input, set the part up for a 1:1 frequency translation, and use the output of the reconstruction filter as your sine wave signal.
You can also drive the system clock input of a DDS, such as the AD9913, with an LVPECL input and use the filtered output as your sine wave signal. However, this would result in a division ratio between your input and output signal.
Is it possible to convert the differential LVPECL to single ended using a transformer and then use a filter to select out only the fundamental?
Once the harmonics are filtered out, the LVPECL O/P also becomes a sine wave!!
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