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Impedance       Article     History   Tree Map
  Encyclopedia of Keywords > Automation > Machinery > Machines > Cable > Impedance   Michael Charnine

Keywords and Sections
CONCEPT
EFFECT
CONTROL
SYSTEM IMPEDANCE
PURELY RESISTIVE IMPEDANCE
MATCHING IMPEDANCE
SPECIFIC IMPEDANCE
SHIELDED TWISTED PAIR
BIOELECTRICAL IMPEDANCE ANALYSIS
SPECIFIC ACOUSTIC IMPEDANCE
BASS SOUND HIGH IMPEDANCE PICKUPS
BALUN
COMPLEX IMPEDANCE
UNSHIELDED TWISTED PAIR
ELECTRICAL IMPEDANCE
ACOUSTIC IMPEDANCE
IMPEDANCE MISMATCHES
IMPEDANCE MISMATCH
IMPEDANCE PLETHYSMOGRAPHY
LOWER
POINT
ACCURACY
LOAD
VELOCITY
METHOD
OPPOSITION
CATEGORY
SIMILARLY
LINE
PARALLEL
AIR
DATA
MONITORING
VARIATIONS
CAPACITOR
CHARGE
VOLUME
BLOOD
COMPONENTS
BRAIN
PAIR
WIRES
ENERGY
RATIO
BLOOD CELL
FREQUENCY
Review of Short Phrases and Links

    This Review contains major "Impedance"- related terms, short phrases and links grouped together in the form of Encyclopedia article.

Definitions

  1. Impedance is the resistance the body's tissue to the passage of electrical current.
  2. Impedance is defined as the frequency domain ratio of the voltage to the current. (Web site)
  3. Impedance is defined by the ratio of two phasors where a phasor is the complex peak amplitude of a sinusoidal function of time. (Web site)
  4. Cable impedance is a characteristic of cables used in electrical engineering, used to allow better communication through them. (Web site)
  5. Cable impedance is a function of size and installation, not manufacturer, so you should be able to get fairly close. (Web site)

Concept

  1. For more general periodic sources and even non-periodic sources, the concept of impedance can still be used. (Web site)

Effect

  1. The cable and equipments used by the telephone companies have effect what the real impedance is.

Control

  1. No. 5,046,960 to Fedder, these air spaces can be used to provide some control over the characteristic impedance of the mated contact. (Web site)

System Impedance

  1. System Impedance The resistance to air flow when moving air through an airflow system. (Web site)
  2. Magnitude of the internal cable reflections, measured in decibels, relative to the actual cable impedance, not the system impedance. (Web site)

Purely Resistive Impedance

  1. A purely resistive impedance will always have a phase angle of exactly 0 o (Z R = R Ω ∠ 0 o). (Web site)

Matching Impedance

  1. For example, a transmitter, interconnecting cable, and receiver should all have matching impedance.

Specific Impedance

  1. Cables impose specific impedance in a signal path. (Web site)

Shielded Twisted Pair

  1. IBM STP (Shielded Twisted Pair) has a characteristic impedance of 150 ohms.

Bioelectrical Impedance Analysis

  1. Percent body fat can be determined with calipers that measure a fold of skin, water displacement, or bioelectrical impedance analysis (BIA).

Specific Acoustic Impedance

  1. The specific acoustic impedance z is the ratio of sound pressure p to particle velocity v at a single frequency. (Web site)

Bass Sound High Impedance Pickups

  1. The pickup is a special low-impedance model (the JCB-1), which produces a bass sound high impedance pickups and active electronics can't match.

Balun

  1. Balun An impedance matching transformer that converts the impedance of one interface to the impedance of another interface.

Complex Impedance

  1. Changes in complex impedance (resistive + reactive) during the cardiac cycle is correlated to ventricular volume.

Unshielded Twisted Pair

  1. Unshielded twisted pair, with an intrinsic impedance of 100 ohms, is the most common type of computer network cabling used today. (Web site)

Electrical Impedance

  1. In one variation, the electrical impedance of the patient tissue 56 is used as a measure of the degree of coagulation. (Web site)
  2. The concept of electrical impedance generalizes Ohm's law to AC circuit analysis. (Web site)
  3. In order to determine the hematocrit, the electrical impedance of the blood is measured and mapped by a mapping function to a corresponding hematocrit value. (Web site)

Acoustic Impedance

  1. Acoustic impedance, being a complex quantity, can have real and imaginary components analogous to those in an electrical impedance. (Web site)
  2. This increased acoustic impedance reduces the required displacement of the loudspeakers and hence increases their lifetime due to reduced metal fatigue. (Web site)

Impedance Mismatches

  1. If multiple cable sections are used, it can result in "impedance mismatches" that are caused by slight differences in the impedance of each cable section. (Web site)
  2. Common causes of echo include impedance mismatches in analog circuitry, and acoustic coupling of the transmit and receive signal at the receiving end.

Impedance Mismatch

  1. Standing wave and reflection effects due to impedance mismatch between circuit and cable. (Web site)

Impedance Plethysmography

  1. Impedance plethysmography: the relationship between venous filling and sensitivity and specificity for proximal vein thrombosis. (Web site)

Lower

  1. As a general rule, the greater the overlap, the lower the antenna impedance. (Web site)

Point

  1. Specific acoustic impedance is the complex ratio of the effective sound pressure at a point to the effective particle velocity at a point. (Web site)

Accuracy

  1. Optionally, the accuracy of both the impedance and direct volume measurements can be improved by producing larger arterial pulses in the finger. (Web site)
  2. Comparison of the accuracy of impedance plethysmography and compression ultrasonography in outpatients with clinically suspected deep vein thrombosis.

Load

  1. The load on the cable should be high (low impedance) and the driving amplifier should be able to "pump" current into the cable. (Web site)

Velocity

  1. Acoustic impedance can be expressed in either its constituent units (pressure per velocity per area) or in rayls. (Web site)

Method

  1. This method is used in applications such as electrical impedance tomography, a type of industrial and medical imaging.

Opposition

  1. Impedance: The total opposition that a circuit offers to the flow of alternating current or any other varying current at a particular frequency. (Web site)
  2. Impedance: The total opposition to electrical flow (resistive plus reactive). (Web site)

Category

  1. Also here, category 3 cables with impedance of 100 Ohm and RJ45 adapters are used in a system of max. (Web site)

Similarly

  1. Similarly, the reciprocal of an impedance is called admittance. (Web site)
  2. Insulated gate bipolar transistors (IGBTs) use a medium power IGFET, similarly connected to a power BJT, to give a high input impedance.

Line

  1. The impedance as measured at the unloaded output terminals of transmission equipment or a line that is otherwise in normal operating condition. (Web site)
  2. The bell circuit is either designed so that it has high impedance in audio frequencies or it is disconnected from line when phone is picked off-hook.
  3. The 620 ohm resistor serves to reduce loading of the line if the output is connected to a very low impedance.

Parallel

  1. In the general case however, equivalent impedance transforms in addition to series and parallel will be required. (Web site)

Air

  1. Here, the dipole water molecules increase the reactance (impedance) and lower the permittivity of the air as humidity rises in the localized parcel of air. (Web site)
  2. The middle ear allows the impedance matching of sound traveling in air to acoustic waves traveling in a system of fluids and membranes in the inner ear. (Web site)
  3. Temperature-dependence of the speed of sound in air c, density of air ρ and acoustic impedance Z vs. (Web site)

Data

  1. The data for impedance plethysmography and ultrasound are summarized in Table 3 for symptomatic patients. (Web site)

Monitoring

  1. The red and white blood cell counts are made by applying the pulses provided when monitoring the impedance of the flow cell to a digital counter. (Web site)
  2. Step g) includes monitoring the coagulation of the patient tissue using at least the compensated measured acoustic impedance. (Web site)

Variations

  1. The same is true for variations in impedance from point to point within the cable. (Web site)

Capacitor

  1. What follows below is a derivation of impedance for each of the three basic circuit elements, the resistor, the capacitor, and the inductor. (Web site)
  2. The number of water molecules absorbed determines the electrical impedance of the capacitor, which is in turn proportional to the water vapour pressure. (Web site)

Charge

  1. When the charge comes down the center electrode, it sees a high impedance and cannot jump the gap, hence a "Misfire".

Volume

  1. The volume of individual erythrocytes can be electronically determined by measurement of their electrical impedance or their light-scattering properties. (Web site)

Blood

  1. Such calculations may be modified to take into account the impedance of the blood measured as described above. (Web site)
  2. Impedance cardiography (ICG) is a hemorheology technique of using sensors to detect the properties of the blood flow in the Thorax.
  3. Impedance plethysmography - A noninvasive diagnostic test used to evaluate blood flow through the leg. (Web site)

Components

  1. The total impedance of many simple networks of components can be calculated using the rules for combining impedances in series and parallel. (Web site)

Brain

  1. Better still, the scalp sensation was minimal, because there was no impedance to the passage of magnetic field into the brain. (Web site)

Pair

  1. Mixed cable types should not be connected in series as the impedance per pair differs slightly and could cause signal degradation.

Wires

  1. The first long telephone air lines (two wires on the poles separated from each other at some distance) used to have impedance of around 600 ohms. (Web site)

Energy

  1. Thus, a mid-bus device transceiver presents an impedance mismatch to the cable and inevitably creates some degree of reflected energy. (Web site)
  2. Return loss is a measure of the reflected energy caused by impedance mismatches in the cabling system. (Web site)

Ratio

  1. It is common in acoustical analyses to represent specific acoustic impedances in terms of their ratio to the characteristic impedance of air. (Web site)
  2. The magnitude of the complex impedance is the ratio of the voltage amplitude to the current amplitude. (Web site)
  3. For small amplitudes, sound pressure and particle velocity are linearly related and their ratio is the acoustic impedance. (Web site)

Blood Cell

  1. As a blood cell passes through the opening, the impedance increases causing a pulse to be provided by the electrical apparatus. (Web site)

Frequency

  1. The relationship between frequency and impedance may not even be linear outside of the device's rated range. (Web site)
  2. There exist an effect that characteristic impedance of a cable if changed with frequency. (Web site)
  3. Because of the frequency, the Interferential wave meets low impedance when crossing the skin to enter the underlying tissue. (Web site)

Categories

  1. Automation > Machinery > Machines > Cable
  2. Si Unit
  3. Encyclopedia of Keywords > Information > Communication > Transmission Medium
  4. Films > Film > Video > Twisted Pair
  5. Resistance

Related Keywords

    * Basses * Cable * Cables * Cable Impedance * Cabling * Capacitance * Change * Changes * Characteristics * Characteristic Impedance * Circuit * Coaxial Cable * Coaxial Cables * Complex Number * Conductivity * Connector * Csf * Current * Device * Dielectric * Electrical * Electrodes * Higher * Imaginary Part * Inductance * Magnitude * Match * Matches * Measure * Measuring * Network * Ohm * Ohms * Output * Phase * Reflection * Resistance * Signal * Si Unit * Telephone * Telephone Line * Transducer * Transmission * Transmission Medium * Twisted * Twisted Pair * Utp * Voltage
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  Short phrases about "Impedance"
  Originally created: April 04, 2011.
  Links checked: January 03, 2013.
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