DIODO VARICAP PDF

DIODO VARICAP. Los diodos varactores o varicap han sido diseñados de manera que su funcionamiento sea similar al de un capacitor y. Diodo Varicap. JC. Johan Cordoba Hoyos. Updated 9 March Transcript. Referencias de imagenes en orden de aparicion y Bibliografia. All following user names refer to dia. Kormoran 87× × ( bytes) Simbolo circuitale di un diodo varicap.

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Generally the use of a varicap diode in a circuit requires connecting it to a tuned circuitusually in parallel with any existing capacitance or inductance. Varactors are used as voltage-controlled capacitors. By using this site, you agree to the Terms of Use and Privacy Policy.

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. The following other diodi use varucap file: Views Read Edit View history. Dr Tuttle’s Home Page. The original can be viewed here: In some applications, such as harmonic multiplicationa large signal amplitude alternating voltage is applied across a varicap to deliberately vary the capacitance at signal rate to generate higher harmonics, which are extracted through dioodo.

Varicap – Wikipedia

Please help improve this section by adding citations to reliable sources. Mann, “Voltage sensitive semiconductor capacitor”, published 23 Mayissued 20 Juneassigned to Pacific Semiconductors, Diido. In case this is not legally possible: I, the copyright holder of this work, hereby publish it under the following license:.

The original description page was here. These types were — and still are — siodo used in television tuners, whose high carrier frequencies require only small changes in capacitance. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file.

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File:Diodo Varicap.png

Simbolo circuitale di un diodo varicap. All diodes exhibit this variable junction capacitance, but varactors are manufactured to exploit the effect and increase the capacitance variation. Varactors dioro operated in a reverse-biased state, so no DC current flows through the device. This licensing tag was added to this file as part of vagicap GFDL licensing update. They are commonly used in voltage-controlled oscillatorsparametric amplifiersand frequency multipliers.

This section does not cite any sources. Views View Varicaap History. When in the high capacitance state, usually with low or no bias, they present a low impedance path to RF, varica when reverse biased their capacitance abruptly decreases and their RF impedance increases.

Internal structure of a varicap. Dipdo and time of digitizing lun 5 lug Retrieved from ” https: By using this site, you agree to the Terms of Use and Privacy Policy. This helps explain the different names for the device as it came into use.

From Wikimedia Commons, the free media repository. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong. This page was last edited on 28 Augustat Generally, the depletion region thickness is proportional to the square root of the applied voltage, and capacitance is inversely proportional to the depletion region thickness. This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it.

Capacitor types Ceramic resonator Crystal oscillator Inductor Parametron Relay reed relay mercury switch. The original uploader was Kormoran at Italian Wikipedia. Potentiometer digital Variable capacitor Varicap. Adobe Photoshop CS Windows. Summary [ edit ] Description Diodo Xiodo.

You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Thus, the capacitance is inversely proportional to the square root of applied voltage. This is a duodo picturewhich means that it has been digitally altered from its original version. These circuit configurations are quite common in television tuners and electronically tuned broadcast AM and FM receivers, as well as other communications equipment and industrial equipment.

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September Learn how and when to remove this template message. Some designs of electronic security tag readers used in retail outlets require these high capacitance varicaps in their voltage-controlled oscillators.

From Wikipedia, the free encyclopedia. Special types of varicap diode exhibiting an abrupt change in capacitance can often be found in consumer equipment such as television tuners, which are used to switch radio frequency signal paths.

Maximum reverse bias voltage is usually between 5 and 7 Volts, before the avalanche process starts conducting. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong. In other projects Wikimedia Commons.

Sometimes, with very high-Q tuned circuits, an inductor is placed in series with the resistor to increase the source impedance of varica control voltage so as not to load the tuned circuit and decrease its Q. Retrieved from ” https: Microelectronic circuits 6th ed. The amount of reverse bias controls the thickness of the depletion zone and therefore the varactor’s junction capacitance. All following user names refer to it. By using this site, you agree to the Terms of Use and Privacy Policy.