jitter

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jitter

(jĭt'ĕr),
The random variability of the cycle-to-cycle duration of vocal fold vibration; contributes to the perception of a rough or harsh voice quality.
Imaging Low amplitude irregularities in echo location on an ultrasound display, attributed to electronic noise, mechanical disturbances, and other nonspecific variables
Physiology Muscle jitter The normal electric variability—‘chaos’—measured by single-fiber EMG—in the interval between 2 action potentials of successive discharges of the same single muscle fiber in the same motor unit; jitter is characterised as instability in subcomponents of motor unit action potentials, and is due to the variation in the synaptic delay at the branch points in the distal axon and at the neuromuscular junction; like fiber density, jitter is increased in neuropathic conditions (motor neuron diseases)—e.g., myasthenia gravis—is accompanied by denervation and reinnervation, and attributed to inefficient transmission of impulses in recent neural collaterals, or due to blocking—abnormal neuromuscular transmission; it is normal or near-normal in myopathic disease
Psychology See Jitters

jitter

Imaging Low amplitude irregularities in echo location on an ultrasound display, attributed to electronic noise, mechanical disturbances, and other variables Neurophysiology Muscle jitter The normal electric variability–'chaos'–measured by single-fiber EMG–in the interval between 2 action potentials of successive discharges of the same single muscle fiber in the same motor unit; jitter is characterized as instability in subcomponents of motor unit action potentials, and is due to the variation in the synaptic delay at the branch points in the distal axon and at the neuromuscular junction; like fiber density, jitter is ↑ in neuropathic conditions–motor neuron diseases–eg, myasthenia gravis, is accompanied by denervation and reinnervation, and attributed to inefficient transmission of impulses in recent neural collaterals, or due to blocking–abnormal neuromuscular transmission; it is normal or near-normal in myopathic disease. See Fiber density, Single-fiber electromyography PsychologyJitters, see there.
References in periodicals archive ?
1 ps rms phase jitter as defined by PCIeG2 standard -- provides clean clock reference and enables reliable system timing with very low error rate.
The results showed the necessity of system-level compliance testing since the crystal oscillator had an even lower RMS phase jitter specification on a component level.
Available over a frequency range of 100 MHz to 175 MHz, the SG7050EBN achieves 65 fs phase jitter.
July 7 /PRNewswire-FirstCall/ -- Zebra Technologies Corporation announced today that it has licensed Magellan's Phase Jitter Modulation (PJM) RFID technology.
The SAW filters are high-Q Quartz devices that enable the circuit to achieve low phase jitter performance over a wide operating temperature range.
It offers the industry's lowest phase noise of -219 dBc/Hz (PLL figure of merit), lowest phase jitter performance of 162 fs (LVPECL) and 232 fs (LVCMOS), and maximum output skew of 20 ps.
The FleXO family of programmable high-performance clock generators deliver ultra-low phase jitter performance as low as 0.
25 MHz and 50 fs @ 700 MHz integrated phase jitter 12 kHz - 20 MHz) suitable for the most demanding applications.
5ps 1-sigma RMS computed phase jitter with thicker, more reliable quartz crystals than those used in contemporary devices while consuming less than 30mA.
11-ps typical intrinsic phase jitter * Less than 630-ps propagation delay times * Clock Rates to 1 GHz (LVDS/LVP18 and LVDS/LVP19) * 250-ps output transition times * 0.
New Programmable FleXO[TM] Clock Generator Family Speeds Design and Test, Offers Sub-1-ps Phase Jitter for Networking Equipment and Other High-Performance Applications
Zarlink's ZL10038 tuner offers low integrated phase jitter (maximum 2 degrees), low IQ (in-phase/quadrature) imbalance, strong intermodulation performance, and high total signal power handling capability to match the performance of DVB-S2 demodulators and provide a front-end solution operating as close as possible to the theoretical maximum (the "Shannon Limit").