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1: Current/Voltage characteristics
1: Current/Voltage characteristics
Published: 2012/10/23
Channel: Advanced Physics Tutor
V-I Characteristics of PN Junction Diode
V-I Characteristics of PN Junction Diode
Published: 2016/03/28
Channel: Neso Academy
Ohm
Ohm's Law as a Voltage-Current Characteristic
Published: 2014/11/11
Channel: Digilent, Inc.
Which is the Killer, Current or Voltage?
Which is the Killer, Current or Voltage?
Published: 2014/03/10
Channel: ElectroBOOM
Voltage Current Graphs - Physics - Science - Get That C In Your GCSE
Voltage Current Graphs - Physics - Science - Get That C In Your GCSE
Published: 2015/10/18
Channel: Christopher Thornton
P5 L4 - relationship between voltage, current and resistance
P5 L4 - relationship between voltage, current and resistance
Published: 2016/06/02
Channel: Gary Whitton
The diode; current and voltage characteristics explained
The diode; current and voltage characteristics explained
Published: 2014/01/27
Channel: Roger Linsell
Voltage, Current and Power explained
Voltage, Current and Power explained
Published: 2016/12/08
Channel: ALL ABOUT ELECTRONICS
MOSFET: Derivation of the Current-Voltage Characteristics
MOSFET: Derivation of the Current-Voltage Characteristics
Published: 2016/11/21
Channel: Mateo Aboy
Current-voltage characteristic of a bipolar junction transistor (BJT)
Current-voltage characteristic of a bipolar junction transistor (BJT)
Published: 2012/02/10
Channel: HomoFaciens
voltage current characteristics
voltage current characteristics
Published: 2014/12/23
Channel: Azeez Patan
Current, Voltage and Resistance
Current, Voltage and Resistance
Published: 2013/04/09
Channel: ATPHYSICS1
Voltage-Current Graphs
Voltage-Current Graphs
Published: 2013/04/11
Channel: ATPHYSICS1
Tutorial 2 : Current Voltage (IV) Characteristics of an LED GCSE AQA Electronics
Tutorial 2 : Current Voltage (IV) Characteristics of an LED GCSE AQA Electronics
Published: 2014/02/03
Channel: Electronics tutorials
BJT Operation: Transistor Current-Voltage Characteristics
BJT Operation: Transistor Current-Voltage Characteristics
Published: 2016/11/07
Channel: Mateo Aboy
NI Multisim: Diode current-voltage characteristic
NI Multisim: Diode current-voltage characteristic
Published: 2012/01/04
Channel: NTS Press
PN Junction : Current flow and Voltage-Current(V- I) characteristics
PN Junction : Current flow and Voltage-Current(V- I) characteristics
Published: 2017/07/20
Channel: ENGINEERING TUTORIAL
#54: Back to Basics Tutorial: Voltage / Current in capacitors and inductors
#54: Back to Basics Tutorial: Voltage / Current in capacitors and inductors
Published: 2012/07/23
Channel: w2aew
Investigation of the current voltage I V characteristics of a component
Investigation of the current voltage I V characteristics of a component
Published: 2017/05/24
Channel: St Cenydd Science
Calculate Current-Voltage Characteristics in Virtual NanoLab
Calculate Current-Voltage Characteristics in Virtual NanoLab
Published: 2013/11/13
Channel: QuantumWise
Voltage, Current, Resistance & Power
Voltage, Current, Resistance & Power
Published: 2016/04/12
Channel: John Ward
explanation of voltage, current, resistance
explanation of voltage, current, resistance
Published: 2013/11/17
Channel: Felix Olsson
Electricity Current Voltage Graphs
Electricity Current Voltage Graphs
Published: 2013/01/03
Channel: PhysicsRocksItsTrue
Voltage, Current and Resistance
Voltage, Current and Resistance
Published: 2011/05/16
Channel: Bozeman Science
Voltage, Current, Resistance and Power
Voltage, Current, Resistance and Power
Published: 2014/01/01
Channel: talkboard.com.au
What is Current and Voltage in a Circuit?
What is Current and Voltage in a Circuit?
Published: 2012/11/02
Channel: mathtutordvd
The Basics of Voltage, Current and Resistance
The Basics of Voltage, Current and Resistance
Published: 2013/10/02
Channel: Step-by-Step Science
Electric Circuits:  Basics of the voltage and current laws.
Electric Circuits: Basics of the voltage and current laws.
Published: 2015/06/12
Channel: Physics Videos by Eugene Khutoryansky
Analogy of Charge, Current, Voltage and Resistance
Analogy of Charge, Current, Voltage and Resistance
Published: 2012/08/20
Channel: ohmingyeo
GCSE Science Revision - Current and Voltage
GCSE Science Revision - Current and Voltage
Published: 2012/04/22
Channel: JamJarMMX
Voltage Current Resistance and ohms law
Voltage Current Resistance and ohms law
Published: 2015/11/08
Channel: POVadventure
PV I V characteristics part1 Isc Voc
PV I V characteristics part1 Isc Voc
Published: 2014/07/31
Channel: ayyanaraz
Current, voltage and resistance in series circuits
Current, voltage and resistance in series circuits
Published: 2014/02/02
Channel: dave evans
Voltage & Current Relationships
Voltage & Current Relationships
Published: 2016/09/11
Channel: Learn Electrical
S1: The current-voltage characteristics of base-emitter and base-collector junction
S1: The current-voltage characteristics of base-emitter and base-collector junction
Published: 2017/03/30
Channel: Abeda Sultana Shamma
Electronics Tutorial #4 - Ohm
Electronics Tutorial #4 - Ohm's Law Pt 1 - Relationship between Current, Voltage and Resistance
Published: 2012/07/17
Channel: mjlorton
Voltage-current characteristics of light bulbs (including CFL and LED)
Voltage-current characteristics of light bulbs (including CFL and LED)
Published: 2013/01/24
Channel: Zaichun Feng
voltage, current and power in hindi
voltage, current and power in hindi
Published: 2016/10/14
Channel: Niket Shah Plus
nMOS current vs voltage characteristics with parametric variation in voltage (part-I)
nMOS current vs voltage characteristics with parametric variation in voltage (part-I)
Published: 2016/10/31
Channel: Team VLSI
VOLTAGE - CURRENT CHARACTERISTICS | Ohm
VOLTAGE - CURRENT CHARACTERISTICS | Ohm's law & Power
Published: 2017/04/30
Channel: THE ELECTRIC GUY
Current Voltage and Resistance  In Tamil
Current Voltage and Resistance In Tamil
Published: 2017/04/05
Channel: EEE VIDS
BATTERIES, AMPERAGE, OHMS, CURRENT, VOLTAGE
BATTERIES, AMPERAGE, OHMS, CURRENT, VOLTAGE
Published: 2014/08/12
Channel: Big Lou East Coast Review
34 1   Electric Current  Voltage and Resistance
34 1 Electric Current Voltage and Resistance
Published: 2014/03/20
Channel: Shiny Happy Physics
Engineering Tutorials : Charge Current Voltage
Engineering Tutorials : Charge Current Voltage
Published: 2017/01/12
Channel: Martronic
Output or Drain Characteristics of JFET
Output or Drain Characteristics of JFET
Published: 2016/11/28
Channel: Neso Academy
Bill Nye: Voltage, Current, Power
Bill Nye: Voltage, Current, Power
Published: 2014/05/05
Channel: coachwieand
Charge, Current and Voltage | GCSE Physics | Doodle Science
Charge, Current and Voltage | GCSE Physics | Doodle Science
Published: 2014/01/27
Channel: DoodleScience
Voltage, Current, Electricity, Magnetism
Voltage, Current, Electricity, Magnetism
Published: 2011/11/29
Channel: Physics Videos by Eugene Khutoryansky
Intro to AC Circuits using Phasors and RMS Voltage and Current | Doc Physics
Intro to AC Circuits using Phasors and RMS Voltage and Current | Doc Physics
Published: 2013/02/04
Channel: Doc Schuster
What is Voltage, Current, Resistance in Hindi !! Difference Between Current, Voltage and Resistance.
What is Voltage, Current, Resistance in Hindi !! Difference Between Current, Voltage and Resistance.
Published: 2017/07/16
Channel: Rajkumar Kushwaha
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WIKIPEDIA ARTICLE

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The current–voltage characteristics of four devices: a resistor with large resistance, a resistor with small resistance, a P–N junction diode, and a battery with nonzero internal resistance. The horizontal axis represents the voltage drop, the vertical axis the current. All four plots use the passive sign convention.

A current–voltage characteristic or I–V curve (current–voltage curve) is a relationship, typically represented as a chart or graph, between the electric current through a circuit, device, or material, and the corresponding voltage, or potential difference across it.

In electronics[edit]

MOSFET drain current vs. drain-to-source voltage for several values of the overdrive voltage, ; the boundary between linear (Ohmic) and saturation (active) modes is indicated by the upward curving parabola.

In electronics, the relationship between the direct current (DC) through an electronic device and the DC voltage across its terminals is called a current–voltage characteristic of the device. Electronic engineers use these charts to determine basic parameters of a device and to model its behavior in an electrical circuit. These characteristics are also known as IV curves, referring to the standard symbols for current and voltage.

In electronic components with more than two terminals, such as vacuum tubes and transistors, the current-voltage relationship at one pair of terminals may depend on the current or voltage on a third terminal. This is usually displayed on a more complex current–voltage graph with multiple curves, each one representing the current-voltage relationship at a different value of current or voltage on the third terminal.[1]

For example the diagram at right shows a family of IV curves for a MOSFET as a function of drain voltage with overvoltage (VGS − Vth) as a parameter.

The simplest IV characteristic involves a resistor, which according to Ohm's Law exhibits a linear relationship between the applied voltage and the resulting electric current. However, even in this case, environmental factors such as temperature or material characteristics of the resistor can produce a non-linear curve.

The transconductance and Early voltage of a transistor are examples of parameters traditionally measured with the assistance of an I–V chart, or laboratory equipment that traces the charts in real time on an oscilloscope.

Special I-V curves characteristics[edit]

In electrophysiology[edit]

An approximation of the potassium and sodium ion components of a so-called "whole cell" I–V curve of a neuron.

While V–I curves are applicable to any electrical system, they find wide use in the field of biological electricity, particularly in the sub-field of electrophysiology. In this case, the voltage refers to the voltage across a biological membrane, a membrane potential, and the current is the flow of charged ions through channels in this membrane. The current is determined by the conductances of these channels.

In the case of ionic current across biological membranes, currents are measured from inside to outside. That is, positive currents, known as "outward current", corresponding to positively charged ions crossing a cell membrane from the inside to the outside, or a negatively charged ion crossing from the outside to the inside. Similarly, currents with a negative value are referred to as "inward current", corresponding to positively charged ions crossing a cell membrane from the outside to the inside, or a negatively charged ion crossing from inside to outside.

The figure to the right shows an V–I curve that is more relevant to the currents in excitable biological membranes (such as a neuronal axon). The blue line shows the V–I relationship for the potassium ion. Note that it is linear, indicating no voltage-dependent gating of the potassium ion channel. The yellow line shows the V–I relationship for the sodium ion. Note that it is not linear, indicating that the sodium ion channel is voltage-dependent. The green line indicates the I–V relationship derived from summing the sodium and potassium currents. This approximates the actual membrane potential and current relationship of a cell containing both types of channel.

References[edit]

  1. ^ H. J. van der Bijl (1919). "Theory and Operating Characteristics of the Themionic Amplifier". Proceedings of the IRE. Institute of Radio Engineers. 7 (2): 97–126. doi:10.1109/JRPROC.1919.217425. 

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