Author Topic: 180MHz clock generator  (Read 1668 times)

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Offline DanioIO

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180MHz clock generator
« on: March 28, 2014, 04:32:39 pm »
Hi,
I'm looking for 180MHz clock for my DDS project, i didnt find any crystal oscillators at that frequency so how is it generated?
 

Offline woodchips

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Re: 180MHz clock generator
« Reply #1 on: March 28, 2014, 06:53:20 pm »
Overtones. Use a 20MHz oscillator (or whatever) and a 180MHz filter.
 

Offline Alexei.Polkhanov

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Re: 180MHz clock generator
« Reply #2 on: March 28, 2014, 08:34:09 pm »
Is your DDS project based on FPGA? like maybe Cyclone III or Spartan? You can configure internal PLL to generate clock signal that you need up to ~300 MHz usually. If not look at DDS IC from Analog Devices AD9851 - that one is probably exactly what you need.

http://www.analog.com/en/rfif-components/direct-digital-synthesis-dds/ad9851/products/product.html
 


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