What is the function of inductors and capacitors?

Capacitance: a capacitor is a device that can store electrical charge.Inductance: mainly plays the role of filtering, oscillation, delay and trap wave, as well as filtering signal, filtering noise, stabilizing current and inhibiting electromagnetic wave interference.

Inductance:

The most common function of inductance in circuit is to form LC filter circuit together with capacitance.Capacitance has the characteristic of "dc resistance, ac", while inductor has the function of "dc resistance, ac resistance".If the dc with many interference signals is passed through the LC filter circuit, then the ac interference signal will be changed into heat energy by the inductance.When the pure dc current flows through the inductance, the ac interference signal is also changed into magnetic sense and heat energy. The higher frequency is the easiest to be induced by the inductive impedance, which can inhibit the interference signal of higher frequency.

An inductor has the property of preventing the flow of alternating current while allowing the flow of direct current. The higher the frequency, the greater the impedance of the coil.Therefore, the main function of an inductor is to isolate, filter or compose a resonant circuit with a capacitor or resistor.

Capacitance:

A capacitor, usually referred to simply as its capacity to hold a charge, is represented by the letter C.

Definition 1: a capacitor, as the name implies, is an 'electrical container', a device that holds a charge.Capacitor.Capacitor is one of the most widely used electronic components in electronic equipment. It is widely used in circuit separation, coupling, bypass, filtering, tuning circuit, energy conversion, control and so on.

Definition 2: a capacitor is any two conductors (including conductors) that are insulated from each other and very close to each other.

● coupling: the capacitance used in the coupling circuit is called the coupling capacitance, which is widely used in the resistance-capacitance coupling amplifier and other capacitive coupling circuit, and plays the role of isolating direct flow and alternating current.

● filter: the capacitor used in the filter circuit is called the filter capacitor. This capacitor circuit is used in the power source filter and various filter circuits. The filter capacitor removes the signal in a certain frequency band from the total signal.

● decoupling: the capacitor used in the decoupling circuit is called the decoupling capacitor. This capacitor circuit is used in the dc voltage supply circuit of the multi-stage amplifier. The decoupling capacitor eliminates harmful low-frequency cross-connection between each amplifier.

● high frequency vibration elimination: the capacitance used in the high frequency vibration elimination circuit is called the high frequency vibration elimination capacitance. In the audio frequency negative feedback amplifier, in order to eliminate the high frequency self-excitation that may occur in the vibration elimination circuit, this capacitor circuit is used to eliminate the high frequency noise that may occur in the amplifier.

● resonance: the capacitor used in the LC resonance circuit is called the resonant capacitor, which is needed in both parallel and series resonance circuits of LC.

● bypass: the capacitor used in the bypass circuit is called the bypass capacitor. If the signal of a certain frequency band needs to be removed from the signal in the circuit, the bypass capacitor circuit can be used. According to the frequency of the signal removed, there are full frequency domain (all ac signals) bypass capacitor circuit and high-frequency bypass capacitor circuit.

● neutralization: the capacitor used in the neutralization circuit is called neutralization capacitance.In radio high frequency and intermediate frequency amplifier, television high frequency amplifier, the use of this neutralizing capacitance circuit to eliminate self - excitation.

Timing: the capacitor used in timing circuit is called timing capacitance.The timing capacitor circuit is used in the circuit which needs to be charged and discharged by the capacitor. The capacitor plays a role in controlling the time constant.

● integral: the capacitor used in the integral circuit is called integral capacitance.In the synchronous separation circuit of potential field scanning, the integrated capacitance circuit can be used to extract the field synchronization signal from the field composite synchronization signal.

● differential: a capacitor used in a differential circuit is called a differential capacitor.In order to obtain the spike trigger signal in the trigger circuit, this kind of differential capacitance circuit is used to obtain the spike trigger signal from various (mainly rectangular pulse) signals.

● compensation: the capacitor used in the compensation circuit is called compensation capacitance. In the bass compensation circuit of the cassette, this low-frequency compensation capacitor circuit is used to improve the low-frequency signal in the playback signal. In addition, there is a high-frequency compensation capacitor circuit.

● bootstrap: the capacitor used in bootstrap circuit is called bootstrap capacitance. The commonly used OTL power amplifier output stage circuit USES this bootstrap capacitor circuit to slightly increase the positive half-cycle amplitude of the signal by means of positive feedback.

● frequency division: the capacitor in the frequency division circuit is called the frequency division capacitor. In the speaker frequency division circuit of the speaker of the speaker box, the frequency division capacitor circuit is used to make the high-frequency speaker work in the high frequency band, the if speaker works in the middle frequency band, and the low-frequency speaker works in the low frequency band.

Load capacitance: refers to the effective external capacitance which together with the quartz crystal resonator determines the load resonance frequency.Common standard values for load capacitance are 16pF, 20pF, 30pF, 50pF, and 100pF.The load capacitance can be adjusted according to the specific situation, and the operating frequency of the resonator can be adjusted to the nominal value.

That's what inductors and capacitors do;We specialize in: SMD inductance, fixed Inductor, etc.Welcome to consult ~