Clock Jitter In Electronics

In electronics and telecommunications, jitter is the deviation from true periodicity of a presumably periodic signal, often in relation to a reference clock signal.In clock recovery applications it is called timing jitter. 1 Jitter is a significant, and usually undesired, factor in the design of almost all communications links.. Jitter can be quantified in the same terms as all time-varying

spec is after the jitter has been filtered by a 5 kHz high-pass filter. Unfortunately, you have no way of knowing what part of the jitter in the histogram is due to lower frequencies and can safely be disregarded. You take a look at the jitter on the data lines relative to the clock, and find that this, too, is dangerously close to the spec limit.

Conceptually, the measurement is made as shown in Figure 2. The oscilloscope is set to infinite persistence, and the oscilloscope is triggered with the ideal clock output from the PLL. Any jitter that is common to the actual clock and ideal clock is not displayed by the oscilloscope, hence the measured jitter is effectively highpass filtered.

Clock Jitter Basics. Page 2 of 9 Deterministic Jitter Deterministic jitter is sometimes referred to as bounded jitter. If all components of a system are known, then you can accurately predict how much jitter will be observed at each transitional edge. Since deterministic jitter is composed of all other non-random

For a spatial location x clock jitter is given as Tjitter, xn Tx, n1 - Tx,n - TCLK, where Tx,n is the clock period for period n, Tx, n1 is clock period for period n1, and TCLK is the nominal clock period. The presence of clock Jitter in an integrated circuit reduces the performance of sequential digital integrated circuits. Figure below

Clock jitter is a critical issue in modern electronics, often posing challenges in high-speed digital systems. It refers to the deviation or variation in the timing of clock pulses, which can lead to significant signal integrity issues if left unaddressed. As electronic devices become increasingly complex, engineers and technicians are required to have a firm understanding of jitter, its

Types of Clock Jitter. Cycle to Cycle Jitter. It is defined as the difference in periods of two consecutive clock cycles. For above example of 100 MHZ clock the consecutive cycles for Ideal Clock is 10ns 20ns 30ns 40ns . . . . 100ns . But, if Cycle to Cycle Jitter is present then the consecutive cycles will be 10ns 9.9ns 9.8ns, 9.7ns, 9.6ns

In high-performance, large scale integrated electronics, jitter is one of the major design considerations. Jitter is generated mainly from the interconnects. Absolute jitter changes the clock signal to a different position from where it was expected to be, and it can be measured with the help of a network analyzer.

Figure 1 depicts both a real waveform a and a noise-free waveform b clock signal.Period jitter is the maximum value of t reflecting the differential magnitude of the P1 to P n value range. Cycle-to-cycle jitter is the maximum deviation of two adjacent periods P n. . . P n1.Intuitively, the steeper the signal's rise and fall time, the less influence random noise has in the time

Jitter is the timing variations of a set of signal edges from their ideal values. Jitters in clock signals are typically caused by noise or other disturbances in the system. Contributing factors include thermal noise, power supply variations, loading conditions, device noise, and interference coupled from nearby circuits. Read this Application Note to learn more.