Search results with tag "Frequency synthesis"
Predicting the Phase Noise and Jitter of PLL-Based ...
designers-guide.orgThe focus of this paper is frequency synthesis. Information on predicting the noise and jitter of clock and data recovery circuits can be found elsewhere [21,23]. 1.1 Frequency Synthesis The block diagram of a PLL operating as a frequency synthesizer is shown in Figure 1 [8]. It consists of a reference oscillator (OSC), a phase/frequency detector
Si5332 Data Sheet - Silicon Labs
www.skyworksinc.comfrequency synthesis on any output up to 250 MHz • Highly configurable output path featuring a cross point mux • Up to three independent fractional synthesis output paths • Up to five independent integer dividers • Embedded 50 MHz crystal option • Input frequency range: • External crystal: 16 to 50 MHz • Differential clock: 10 to ...
Phase Locked Loops (PLL) and Frequency Synthesis
rfic.eecs.berkeley.eduBy making the divider N programmable, we can tune the VCO frequency in either integer steps of the reference (integer-N architecture) or in fractional amounts (fractional-N architecture). f = (N + p)f ref Nf ref = pf ref In a fractional divider, p <1 and is realized by dithering the divider between N and N + 1 using a sigma-delta modulator.
7 Series FPGAs Clocking Resources User Guide (UG472)
www.xilinx.com03/04/2015 1.11.1 Updated Frequency Synthesis Using Fractional Divide in the MMCM, page 73 by changing 0.125 degrees to 0.125. 06/12/2015 1.11.2 Fixed broken link in three references to 7 Series FPGA Data Sheets on page 73 and page 74. 09/27/2016 1.12 Added the Spartan-7 FPGAs and the Artix-7 (XC7A12T and XC7A25T) devices where