spread spectrum clocking_xilinx pre-production_Free running(5)

Continuing the example from above, the clock signal may be modulated at a frequency of 20 kHz for clock frequencies between 320 MHz and 323。2 MHz。 Because the clock signal spends less time in the frequency range correlated with the target band and more time in the frequency range not correlated with the target band, less electromagnetic energy is radiated in the frequency domain that overlaps with the target band (around the base frequency and/or its harmonics), as will be described in more detail below in regard to FIGS。 4-5。 From step 208, the routine 200 ends。

FIG。 3 and the following description are intended to provide a general description of a suitable environment in which the embodiments described herein may be implemented。 In particular, FIG。 3 shows an illustrative electronic device, such as an HDD device 300, along with hardware, software and components for performing adaptive spread-spectrum clocking to limit interference in a target band, according to the embodiments provided herein。 The HDD device 300 may include a controller 310 that controls the operations of the device。

The controller 310 may include a processor 312 to monitor and control the operations of the HDD device 300。 The controller 310 may further include a host intece 314 allowing the HDD device 300 to communicate with a host system or other components, such as a server computer, personal computer (“PC”), laptop, tablet, game console, set-top box or any other electronics device that can be communicatively coupled to the HDD device 300 to store and retrieve data from the device。 The controller 310 may further comprise a read/write channel 316 through data is written to and read from the magnetic recording channel of the HDD device 300

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