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Home > News > Industry News > Two PLLs and a VCO in one chip.....

Two PLLs and a VCO in one chip for RF and IF synthesis

  • Author:Ella Cai
  • Release on:2017-07-19
CML Microcircuits is offering two phase-locked loops and a VCO in one chip.

Called CMX979 is designed to implement an RF synthesiser at the same time as an IF synthesiser.

The RF synthesiser operates over 2.7-3.6GHz with a integrated VCO and PLL, and is capable of operating between 338MHz and 3.6GHz via a configurable output frequency divider.

The IF synthesiser is an integer-N type operating over 500-1,000MHz. It includes an integrated loop filter and a VCO that only requires an external inductor. A configurable output divider supports IF output frequencies over 31MHz to 1GHz.

“Whilst there are many PLL/VCO solutions in the market, the CMX979 is unique in combining such a wide operating frequency range and level of integration with low power consumption,” said the firm. “Most other integrated solutions are only single synthesisers.”

CML CMX979Available in a 6 x 6mm VQFN, it supports both single-conversion and super-heterodyne radio architectures, and has been designed to trade power consumption against the expense of phase noise performance, and is therefore aimed at low power and low cost RF solutions.

It features on-chip VCO calibration for both synthesisers to promote consistent performance across temperature and supply voltage variations, together with calibration monitoring and reporting to allow full user control if needed.