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A capacitor is composed of two conductors that are separated by an insulator. This is a simple definition, but it says a lot about capacitance, and it says it very well. By this definition, there could be capacitance just about anywhere in a power system or circuit. Yes! There could! And there is! Capacitance offers "resistance" to alternating current (AC) signals called reactance. The higher the frequency, the less reactance there is and the better the signal will be able to pass through the capacitor. In modern electronic equipment, there are lots of circuit pathways and lots of components in the circuits. This leads to a lot of distributed capacitance in the circuit. This distributed capacitance represents a lot of little pathways for signals to "jump gaps" in the circuit. Signals will avoid going through the components and devices and also avoid following all the pathways it is supposed to follow. The signals will be "shorted around" components or "shorted to ground" in other pathways. This combines to effect signal loss or degradation. The higher the frequency of the signal put through a circuit, the more loss there will be to the signal due to distributed capacitance.
What else can I help you with?
What is the effect of capacitance in high frequency circuits and how it is getting added?
First, capacitance is the resistance of something to a change in voltage. And capacitance exists anywhere there is a conductor that is insulated from another conductor. With that definition, anything has capacitance. And that's correct. It is also the key to understanding the capacitance in high frequency (radio frequency or RF) circuits. The fact that a circuit had conductive pathways and component leads and such means that there is a lot of little bits of capacitance distributed around the circuit. The capacitance is already there; it isn't "added" later as might be inferred. Normally, this bit of capacitance isn't a problem. But at higher and higher frequencies, it is. Remember that the higher the frequency of an AC signal, the better it goes through a given cap. So at higher and higher frequencies, the distributed capacitance in the circuit "shorts the signal to ground" and takes it out of the circuit. The RF is said to be coupled out of the circuit through the distributed capacitance in that circuit. The higher the frequency a given circuit is asked to deal with, the more signal will be lost to this effect. It's just that simple. Design considerations and proper component selection minimize the distributed capacitance in a circuit.
What is meant by parasitic capacitor?
Parasitic capacitance is the unwanted capacitance between: 1. A signal line and other signal line. 2. A signal line and earth. 3. A signal line and power supply line. Not that, I remember all (even most) of the effects, let me answer you with whatever I remember: 1. Unwanted coupling between two different signals, resulting in "crosstalk" between two signals. One signal interferes with other and other interferes with one. 2. attenuation / distortion of high frequency signals which have high impedance / limited current capability. 3. Ringing (unwanted oscillations) rising edge and falling edge of the signals rectangular / square wave.
How does one reduce stray capacitance?
You can reduce stray capacitance by avoiding having long wires running parallel in circuits. Keep wires as short as possible. Long wires running along each other can exhibit stray capacitance effects. Another way is to cut long leads of components such as capacitors and inductors to make them as short as possible. If best, use SM components, as they have no leads which can cause this stray capacitance effect.
Is cable coaxial the same as satellite coaxial?
Most times they are the same but a satellite signal needs to be carried by RG6 cable it is a heavier gauge wire then say RG59. Regular or analog cable signal is sometimes carried by RG59 but digital cable should use RG6. +++ The primary specification is not conductor size but the impedance and capacitance of the cable.
Why use capacitors with crystal oscillator?
There are two kinds of crystal oscillators. One operates at what is called the "series resonance" of the crystal. This resonance is the frequency at which the (AC) impedance between the pins of the crystal is almost zero. The frequency is independent of how much capacitance happens to be in parallel with the crystal - its inside the oscillator and part of the circuit board, etc. But, even frequency that the oscillator runs at.The other kind of oscillator oscillates at "parallel resonance"of the crystal. At this frequency, the impedance from pin to pin of the crystal is almost infinite. This frequency depends on how much capacitance is connected in parallel with the crystal. This parallel capacitance is called "load capacitance". Generic signal-inverter oscillator is this kind of oscillator.The common oscillator connection is for the crystal to be connected from the inverter output to the input. And, there is a capacitor at each end of the crystal to ground. The NET load capacitance is SERIES equivalent value of those two capacitors.PLUS stray capacitance from the circuit board and the guts of the oscillator. Suppose that the crystal is rated for 22pF load capacitance. The stray capacitance is about 7pF. So, that leave 15pF to be made up from discrete external capacitors. If the external capacitors are equal, then their equivalent is half of their individual value. Thus, in this case, we would want a pair of 30pF capacitors.
You will have signal degradation unless you use the amplifier.?
You will have signal degradation unless you use the amplifier.
What is capacitance on cat5 E cable mean?
Capacitance in a Cat5e cable refers to the ability of the cable to store electrical charge between its conductors, which can impact signal transmission. It is measured in picofarads per meter (pF/m) and affects the cable's performance, particularly in high-frequency applications. High capacitance can lead to signal degradation or loss over long distances, making it important for network efficiency and integrity. Understanding capacitance helps in selecting the right cable for specific networking needs.
What in the cable limits signal degradation?
A: As cable lenght increases the impedance changes with frequency especially at half wave lenght where at some frequency the impedance can be zero. The impedance is a function of capacitance inductance and resistance in the cable
What is meant by term signal degradation?
degration means to degrade something.
What does the twisting of the wires do in a CAT 5 cable?
limits signal degradation
What is the characteristics of wireless transmission - signal degradation?
sial la puiii
What is the effect of capacitance in high frequency circuits and how it is getting added?
First, capacitance is the resistance of something to a change in voltage. And capacitance exists anywhere there is a conductor that is insulated from another conductor. With that definition, anything has capacitance. And that's correct. It is also the key to understanding the capacitance in high frequency (radio frequency or RF) circuits. The fact that a circuit had conductive pathways and component leads and such means that there is a lot of little bits of capacitance distributed around the circuit. The capacitance is already there; it isn't "added" later as might be inferred. Normally, this bit of capacitance isn't a problem. But at higher and higher frequencies, it is. Remember that the higher the frequency of an AC signal, the better it goes through a given cap. So at higher and higher frequencies, the distributed capacitance in the circuit "shorts the signal to ground" and takes it out of the circuit. The RF is said to be coupled out of the circuit through the distributed capacitance in that circuit. The higher the frequency a given circuit is asked to deal with, the more signal will be lost to this effect. It's just that simple. Design considerations and proper component selection minimize the distributed capacitance in a circuit.
What is the significance of wire capacitance in electrical circuits and how does it affect the overall performance of the system?
Wire capacitance in electrical circuits refers to the ability of wires to store electrical energy. This capacitance can affect the overall performance of the system by causing delays in signal transmission, affecting the speed and efficiency of the circuit. It can also lead to signal distortion and interference, impacting the accuracy and reliability of the system. Managing wire capacitance is important in designing efficient and reliable electrical circuits.
A hub that functions as a repeater inhibits the effect of what type of signal degradation?
Attenuation
What is used to extend the length of the network without having the signal degradation?
repeater
Why does the concept of stray capacitance came into electronic circuits?
Any two objects that occupy the same universe have capacitance between them. In electronic circuits components are quite close to each other, and this capacitance is often a nuisance, causing cross-talk, instability, and signal losses.
What is signal degradation in data communications?
A downward change in signal strength where the wave 'Fades' from distance lmitations, interference, noise or EMI.
