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Content. Types of Jitter and Jitter Causes Jitter Effects Jitter Cleaning Techniques. Jitter Effects Clocking Data Converters (1). ADC. f3 = 3*f2. V in (volts). Clock Generator. Distribution of the sampled voltage value due to sampling jitter. . f2 = X.

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  1. Content • Types of Jitter and Jitter Causes • Jitter Effects • Jitter Cleaning Techniques

  2. Jitter EffectsClocking Data Converters (1) ADC f3 = 3*f2 Vin (volts) Clock Generator Distribution of the sampled voltage value due to sampling jitter. f2 = X • Sampling jitter has two components: • Jitter on the sampling clock • Aperture jitter from the ADC. • Because they are uncorrelated, these jitters are combined as the root sum square: f1 = DC time (s) Tsample- s tsample Tsample+ s

  3. Jitter EffectsClocking Data Converters (2) Assuming a sinusoidal input for Vin we have, Differentiating with respect to time yields the signal slope, RMS Taking the RMS value, Therefore, the RMS error voltage due to jitter is Therefore, the SNR component due to jitter is: Signal to noise ratio (SNR) is defined by,

  4. Jitter EffectsClocking Data Converters (3)

  5. Jitter EffectsClocking Data Converters (4) Signal path with effective resolution of 12-bit and an input bandwidth of 500MHz requires a clock with less than 200 fs of total jitter!

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