diode definition
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diode diode (dī'ōd') An electrical device with two active terminals, an anode and a cathode, through which current passes more easily in one direction (from anode to cathode) than in the reverse direction. Diodes have many uses, including conversion of AC power to DC power, and the decoding of audio-frequency signals from radio signals.
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Laser diode A laser diode, (LD), injection laser diode (ILD), or diode laser is a semiconductor device similar to a light-emitting diode in which the laser beam is created at the diode's junction.
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- Diodes are small cylindrical shaped components which are consisted of two leads, the Anode and the Cathode. The Cathode is the striped side of the diode. Usually a diode is black in color with a gray stripe, marking the Cathode side of the diode. Current will flow through a diode in one direction only. When the Anode side of the diode is facing towards the positive source of voltage, it will allow the circuit to be completed, and is considered Forward Biased.
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Diode Equation Ideal Diodes. The diode equation gives an expression for the current through a diode as a function of voltage. T = absolute temperature (K). The dark saturation current (I0) is an extremely important parameter which differentiates one diode from another. I0 is a measure of the recombination in a device.
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Polarity Diode and LED Polarity. Diodes only allow current to flow in one direction, and they’re always polarized. A diode has two terminals. The positive side is called the anode, and the negative one is called the cathode. The diode circuit symbol, with the anode and cathode marked. Current through a diode can only flow from the anode to the cathode, which would explain why it’s important for a diode to be connected in the correct direction. Physically, every diode should have some sort of indication for either the anode or cathode pin.
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Polarity A diode has two terminals. The positive side is called the anode, and the negative one is called the cathode. The diode circuit symbol, with the anode and cathode marked. Current through a diode can only flow from the anode to the cathode, which would explain why it’s important for a diode to be connected in the correct direction. Physically, every diode should have some sort of indication for either the anode or cathode pin.
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- Diodes. A diode is a discrete component that allows current to flow in one direction only. It is a polarised component with two leads, called the cathode and the anode. The cathode is normally marked with a silver or coloured band or the symbol ' - '. diode is a discrete component that allows current to flow in one direction only. It is a polarised component with two leads, called the cathode and the anode. The cathode is normally marked with a silver or coloured band or the symbol ' - '.
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How to Tell Which Way Round a Diode Should Be Two Methods: Examining the Markings Using a Multimeter. A diode is a two terminal electronic device which conducts current in one direction and blocks current in the opposite direction. A diode can also called a rectifier, which converts AC to DC. Since diodes are essentially one-way, it's important to know how to determine which end is which.
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Light-emitting diode A bulb-shaped modern retrofit LED lamp with aluminium heat sink, a light diffusing dome and E27 screw base, using a built-in power supply working on mains voltage. A light-emitting diode (LED) is a two-lead semiconductor light source. It is a p–n junction diode, which emits light when activated. When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons.
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Is diode a voltage controlled or current device? , studied at /home/. Diode is technically an uncontrolled device (aka uncontrolled switch). Its switching depends on the applied load voltage itself. It will turn on when the applied voltage is greater than the threshold voltage (no matter what current flows).
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Semiconductor device A semiconductor diode is a device typically made from a single p–n junction. At the junction of a p-type and an n-type semiconductor there forms a depletion region where current conduction is inhibited by the lack of mobile charge carriers. semiconductor diode is a device typically made from a single p–n junction. At the junction of a p-type and an n-type semiconductor there forms a depletion region where current conduction is inhibited by the lack of mobile charge carriers.
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cathode Define cathode: the electrode of an electrochemical cell at which reduction occurs:; the negative terminal of an electrolytic cell the electrode of an electrochemical cell at which reduction occurs:; the negative terminal of an electrolytic cell…
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Diodes The diode operates when a voltage signal is applied across its terminals. The application of a DC voltage to make the diode operate in a circuit is called as ‘Biasing’. As already mentioned above the diode resembles to that of a one way switch so it can either be in a state of conduction or in a state of non conduction.
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triode triode - a thermionic vacuum tube having three electrodes; fluctuations of the charge on the grid control the flow from cathode to anode which makes amplification possible
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The /bin Directory An inode is a data structure on a filesystem on Linux and other Unix-like operating systems that stores all the information about a file except its name and its actual data. A data structure is a way of storing data so that it can be used efficiently.
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- A light-emitting diode (LED) is a semiconductor device that creates light using solid-state electronics. A diode is composed of a layer of electron rich material separated by a layer of electron deficient material which forms a junction.
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- An electrical circuit used to convert AC into DC current. A rectifier is a diode that causes the current to flow in only one direction. The output of the rectifier is essentially half-AC current, which is then filtered into DC. Contrast with inverter. See diode.
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- LEDs are semiconductor diodes, electronic devices that permit current to flow in only one direction. The diode is formed by bringing two slightly different materials together to form a PN junction (Figure 2).
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- Medical Definition of CATHODE. 1. : the electrode of an electrochemical cell at which reduction occurs: as a: the negative terminal of an electrolytic cell b: the positive terminal of a storage battery that is delivering current.2. : the electron-emitting electrode of an electron tube—compare anode.. : the electrode of an electrochemical cell at which reduction occurs: a: the negative terminal of an electrolytic cell b: the positive terminal of a galvanic cell. 2. : the electron-emitting electrode of an electron tube; broadly: the negative electrode of a diode — compare anode.
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Diode The most common function of a diode is to allow an electric current to pass in one direction (called the diode's forward direction), while blocking current in the opposite direction (the reverse direction). Thus, the diode can be viewed as an electronic version of a check valve.he most common function of a diode is to allow an electric current to pass in one direction (called the diode's forward direction), while blocking current in the opposite direction (the reverse direction). Thus, the diode can be viewed as an electronic version of a check valve.
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- full definition of led a semiconductor diode that emits light when a voltage is applied to it and that is used especially in electronic devices as for an indicator light
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Diode A semiconductor diode, the most common type today, is a crystalline piece of semiconductor material with a p–n junction connected to two electrical terminals. A vacuum tube diode has two electrodes, a plate (anode) and a heated cathode. Semiconductor diodes were the first semiconductor electronic devices. For a bias less than the PIV, the reverse current is very small. 2  For a normal P–N rectifier diode, the reverse current through the device in the micro-ampere (µA) range. 3  However, this is temperature dependent, and at sufficiently high temperatures, a substantial amount of reverse current can be observed (mA or more).
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- The most common type of diode is a silicon diode. It is enclosed in a glass cylinder with the dark band marking the cathode terminal. This line points towards the positive of a circuit. The opposite terminal is called the anode.
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- di•e•lec•tric. 1. a nonconductor of electricity; insulator. 2. a substance in which an electric field can be maintained with a minimum loss of power. 3. of or pertaining to a dielectric substance. [1830–40; di- 3 + electric ]. di`e•lec′tri•cal•ly, adv.
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Semiconductor device Semiconductor devices are manufactured both as single discrete devices and as integrated circuits (ICs), which consist of a number—from a few (as low as two) to billions—of devices manufactured and interconnected on a single semiconductor substrate, or wafer. semiconductor diode is a device typically made from a single p–n junction. At the junction of a p-type and an n-type semiconductor there forms a depletion region where current conduction is inhibited by the lack of mobile charge carriers.
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Diode In electronics, a diode is a two-terminal electronic component that conducts primarily in one direction (asymmetric conductance); it has low (ideally zero) resistance to the current in one direction, and high (ideally infinite) resistance in the other.