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Fractional-N PLL Tunes 33 To 4100 MHz

Feb. 21, 2013
A high-speed phase-locked loop provides stable low-noise output signals from 33 to 4100 MHz with an external oscillator or its own internal source.

Model HMC835LP6GE from Hittite is a wideband fractional-N phase-lock-loop (PLL) source with integrated voltage-controlled oscillator (VCO) that provides continuous frequencies from 33 to 4100 MHz. It features PLL figure of merit for phase noise of -230 dBc/Hz in integer mode, -227 dBc/Hz in fractional mode, and typical VCO phase noise of -134 dBc/Hz offset 1 MHz from a 4-GHz carrier. Two separate charge-pump outputs allow seamless switching between integrated or external VCOs during operation. Suitable for scalable multiple-input, multiple-output (MIMO) and beam-forming applications, the PLL provides two differential output ports and delivers +7 dBm typical output power. It runs on +3.3- and +5.0-VDC supplies.

Hittite Microwave Corp., 2 Elizabeth Dr., Chelmsford, MA 01824; (978) 250-3343, FAX: (978) 250-3373, e-mail: [email protected], www.hittite.com.

About the Author

Jack Browne | Technical Contributor

Jack Browne, Technical Contributor, has worked in technical publishing for over 30 years. He managed the content and production of three technical journals while at the American Institute of Physics, including Medical Physics and the Journal of Vacuum Science & Technology. He has been a Publisher and Editor for Penton Media, started the firm’s Wireless Symposium & Exhibition trade show in 1993, and currently serves as Technical Contributor for that company's Microwaves & RF magazine. Browne, who holds a BS in Mathematics from City College of New York and BA degrees in English and Philosophy from Fordham University, is a member of the IEEE.

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