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What is a coupling?

couplings are used to join sections of long transmission shafts. couplings are also used to connect the shaft of a driving machine to the shaft of a separately built machine so as to give an effect of continuous shaft. the general classification of couplings is as given under: 1. rigid coupling 2. flexible coupling 3.Camlock coupling


What is coupled capacitor?

There is no coupled capacitor in existence that i know. Capacitors can be used to couple or decouple a signal


Why you need RC coupled amplifier?

Rc coupled amplifier is used where good frequency response required. in case of multistage amplification system,To prevent resistance of one stage to come in parallel with next stage, it is used. we use capacitor as a coupling element between two consecutive stages.


Why PNP and NPN are used in direct coupling?

To save a decoupling capacitor & biasing resistors for the PNP.


What is coupling in electronics?

AC coupling is where a capacitor is used to block the DC componant of a signal. Used often in Medical devices when a DC componant could harm a patient Coupling refers to transferring electrons trough a media. It could magnetic such as coils proximity. A transformer and yes even a capacitor. And no it has no medical devices ONLY application.


How many type of coupling?

For most parts of electronics is concerned,there are two types of coupling in any alternating current source (AC) circuits: 1)capacitive coupling(Also known as the AC coupling) 2)Inductive Coupling(Also known as the Transformer coupling) Two circuits of different amplification factors and different hybrid parameter values can be merged or coupled by means of a capacitor (capacitive coupling) or an inductor or a transformer (inductive coupling).There are coupling coefficients involved with the transformer.But Capacitor blocks DC and allows AC most of the time.We use ceramic capacitors for this purpose.However never replace the ceramic capacitor with an electrolytic capacitor .Electrolytic capacitors are strictly polar while ceramic capacitors are not.Electrolytic capacitors are used as bypass capacitors.They bypass the current from the resistances that are parallel to them during high frequencies.This is so because the reactance of the capacitor is low at such high frequencies.Also current takes the least resistance path.As reactance gives the AC equivalent of the resistance,current flows into the capacitor while resistance and capacitors are connected end-end and thus the current reaches the other node(its like a diversion or a detour or a shortcut on the road for vehicles-analogously it is the simplest path a current can follow on the conductor


Why you use coupling capacitor in electronic amplifier?

It is used to couple output of one stage to input of next stage


Why coupling capacitor is used inelectronics circuits?

To Block DC voltages and couple AC signals through to the next circuit.


What is the purpose of a blocking capacitor?

At high frequency, capacitor can be considered as 1. Short Circuit in AC analysis. 2. Open Circuit in DC analysis. {because Xc= 1/(2*f*pi) where f= supply frequency,pi=3.14} As at high frequencies, in DC analysis, capacitor will be open circuited & can block the DC signal while AC signal is allowed to pass through.. Hence, this capacitor will act as a blocking capacitor for DC supply.


Why capacitor is used in circuit board?

use as coupling in some circuts and and as a filter in rectifier circuit. use as DC current blocking.


Which type of coupling capacitor is used in RC coupling?

Capacitor coupling involves the use of coupling capacitors.Coupling capacitors are mostly ceramic capacitors.These are in the range of 0.47picofarad to 4.7 microfarad.Never use an electrolytic capacitor for coupling.It is meant for bypassing.coupling capacitors aloow AC and block DC components of a DC coupled signal.This DC component may also include noise,a grounded voltage signal or a step function.The analysis of the circuit involves determining the h-parameters of the amplifying stages,the Fourier transform of the signal applied and at various points of the circuit and the Laplace transform of the circuit sections in order to know the conditions of operations .Using complex engineering mathematics,the time varying analysis can be performed .This makes use of the Maxwell's equations to know the fields of the passive and active elements.


What is the function of a coupling capacitor?

A coupling capacitor is used to block the flow of direct current while allowing alternating or signal currents to pass, hence mainly used for joining two stages in radio and amplifier circuits.Also known as blocking capacitor or stopping capacitor. They are also used in substations within a "wave trap" where communication is done by a.c. power line and any d.c. signals need to be attenuated or blocked.