ADI’s ADF5610 fractional-N synthesiser covers 55MHz to 15GHz, and is claimed to have “industry’s lowest phase noise performance on a single chip” by its maker. Fabbed on a SiGe BiCMOS process, at 10GHz VCO phase noise is -114dBc/Hz at 100kHz offset and -165dBc/Hz at 100MHz offset. Normalized phase noise floor is -229dBc/Hz. Typical output power is ...
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from Electronics Weekly https://www.electronicsweekly.com/news/products/rf-microwave-optoelectronics/low-phase-noise-55mhz-15ghz-fractional-n-synth-2018-07/
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