型號(hào)不同的電容在電路中有多種不同的應(yīng)用，需要我們根據(jù)電容器所使用的環(huán)境選擇適合的電容元器件。那么電容在電路中究竟有多少種應(yīng)用呢？

　　Different types of capacitors have different applications in the circuit, so we need to choose the appropriate capacitor components according to the environment used by the capacitor. So how many kinds of applications do capacitors have in circuits?

　　1.濾波電容：它接在直流電壓的正負(fù)極之間,以濾除直流電源中不需要的交流成分,使直流電平滑,通常采用大容量的電解電容,也可以在電路中同時(shí)并接其它類型的小容量電容以濾除高頻交流電。

　　Filter capacitor: it is connected between the positive and negative poles of the DC voltage to filter out the unnecessary AC components in the DC power supply and make the DC level smooth. Generally, large capacity electrolytic capacitors can be used, and other types of small capacity capacitors can be connected in the circuit at the same time to filter out high-frequency AC power.

　　2.退耦電容：并接于放大電路的電源正負(fù)極之間,防止由電源內(nèi)阻形成的正反饋而引起的寄生振蕩。

　　Decoupling capacitor: it is connected between the positive and negative poles of the power supply of the amplifier circuit to prevent the parasitic oscillation caused by the positive feedback formed by the internal resistance of the power supply.

　　3.旁路電容：在交直流信號(hào)的電路中,將電容并接在電阻兩端或由電路的某點(diǎn)跨接到公共電位上,為交流信號(hào)或脈沖信號(hào)設(shè)置一條通路,避免交流信號(hào)成分因通過電阻產(chǎn)生壓降衰減。

　　Bypass capacitance: in the circuit of AC and DC signals, the capacitors are connected to both ends of the resistance in parallel or connected to the common potential from a certain point of the circuit, so as to set a path for AC signal or pulse signal, so as to avoid voltage drop attenuation of AC signal components due to resistance.

　　4.耦合電容：在交流信號(hào)處理電路中,用于連接信號(hào)源和信號(hào)處理電路或者作為兩放大器的級(jí)間連接,用于隔斷直流,讓交流信號(hào)或脈沖信號(hào)通過,使前后級(jí)放大電路的直流工作點(diǎn)互不影響。

　　Coupling capacitance: in the AC signal processing circuit, it is used to connect the signal source and the signal processing circuit, or as the stage connection between two amplifiers. It is used to cut off the DC signal and let the AC signal or pulse signal pass through, so that the DC working points of the front and rear stage amplifier circuits do not affect each other.

　　5.調(diào)諧電容：連接在諧振電路的振蕩線圈兩端,起到選擇振蕩頻率的作用。

　　Tuning capacitor: it is connected at both ends of the oscillation coil of the resonant circuit to select the oscillation frequency.

　　6.襯墊電容：與諧振電路主電容串聯(lián)的輔助性電容,調(diào)整它可使振蕩信號(hào)頻率范圍變小,并能顯著地提高低頻端的振蕩頻率。

　　Pad capacitor: an auxiliary capacitor in series with the main capacitor of the resonant circuit. Adjusting it can reduce the frequency range of the oscillation signal and significantly increase the oscillation frequency at the low frequency end.

　　7.補(bǔ)償電容：與諧振電路主電容并聯(lián)的輔助性電容,調(diào)整該電容能使振蕩信號(hào)頻率范圍擴(kuò)大。

　　Compensation capacitor: the auxiliary capacitor in parallel with the main capacitor of the resonant circuit. Adjusting the capacitor can expand the frequency range of the oscillation signal.

　　8.中和電容：并接在三極管放大器的基極與發(fā)射極之間,構(gòu)成負(fù)反饋網(wǎng)絡(luò),以抑制三極管極間電容造成的自激振蕩。

　　Neutralizing capacitance: it is connected in parallel between the base and emitter of the triode amplifier to form a negative feedback network to suppress the self-excited oscillation caused by the capacitance between the triode electrodes.

　　9.穩(wěn)頻電容：在振蕩電路中,起穩(wěn)定振蕩頻率的作用。

　　Frequency stabilizing capacitor: in the oscillation circuit, it can stabilize the oscillation frequency.

　　10.定時(shí)電容：在RC時(shí)間常數(shù)電路中與電阻R串聯(lián),共同決定充放電時(shí)間長(zhǎng)短的電容。

　　Timing capacitor: it is connected with resistance R in series in RC time constant circuit to jointly determine the charging and discharging time.

　　11.加速電容：接在振蕩器反饋電路中,使正反饋過程加速,提高振蕩信號(hào)的幅度。

　　Accelerating capacitor: connected in the oscillator feedback circuit to accelerate the positive feedback process and increase the amplitude of the oscillation signal.

　　12.縮短電容：在UHF高頻頭電路中,為了縮短振蕩電感器長(zhǎng)度而串聯(lián)的電容。

　　Shortening capacitance: in UHF high frequency head circuit, the capacitance in series to shorten the length of oscillation inductor.

　　13.克拉波電容：在電容三點(diǎn)式振蕩電路中,與電感振蕩線圈串聯(lián)的電容,起到消除晶體管結(jié)電容對(duì)頻率穩(wěn)定性影響的作用。

　　Clapper capacitor: in a capacitor three-point oscillation circuit, a capacitor connected in series with an inductive oscillation coil to eliminate the effect of transistor junction capacitance on frequency stability.

　　14.錫拉電容：在電容三點(diǎn)式振蕩電路中,與電感振蕩線圈兩端并聯(lián)的電容,起到消除晶體管結(jié)電容的影響,使振蕩器在高頻端容易起振。

　　Scylla capacitor: in the capacitor three-point oscillation circuit, the capacitor connected in parallel with both ends of the inductance oscillation coil can eliminate the influence of transistor junction capacitance and make the oscillator easy to vibrate at the high frequency end.

　　15.穩(wěn)幅電容：在鑒頻器中,用于穩(wěn)定輸出信號(hào)的幅度。

　　Amplitude stabilizing capacitor: used to stabilize the amplitude of output signal in frequency discriminator.

　　16.預(yù)加重電容：為了避免音頻調(diào)制信號(hào)在處理過程中造成對(duì)分頻量衰減和丟失,而設(shè)置的RC高頻分量提升網(wǎng)絡(luò)電容。

　　Pre weighting capacitance: in order to avoid the attenuation and loss of frequency division caused by audio modulation signal in the process of processing, the RC high frequency component is set to enhance the network capacitance.

　　17.去加重電容：為了恢復(fù)原伴音信號(hào),要求對(duì)音頻信號(hào)中經(jīng)預(yù)加重所提升的高頻分量和噪聲一起衰減掉,設(shè)置RC在網(wǎng)絡(luò)中的電容。

　　De weighting capacitance: in order to recover the original accompanying sound signal, it is required to attenuate the high-frequency component and noise in the audio signal after pre emphasis, and set RC capacitance in the network.

　　18.移相電容：用于改變交流信號(hào)相位的電容。

　　Phase shifting capacitance: capacitance used to change the phase of AC signal.

　　19.反饋電容：跨接于放大器的輸入與輸出端之間,使輸出信號(hào)回輸?shù)捷斎攵说碾娙荨?/p>

　　Feedback capacitance: the capacitance that is bridged between the input and output of the amplifier to make the output signal back to the input.

　　20.降壓限流電容：串聯(lián)在交流回路中,利用電容對(duì)交流電的容抗特性,對(duì)交流電進(jìn)行限流,從而構(gòu)成分壓電路。

　　Step down current limiting capacitor: it is connected in series in the AC circuit to limit the AC current by using the capacitive reactance characteristics of the capacitor to AC, thus forming a voltage dividing circuit.

　　21.逆程電容：用于行掃描輸出電路,并接在行輸出管的集電極與發(fā)射極之間,以產(chǎn)生高壓行掃描鋸齒波逆程脈沖,其耐壓一般在1500伏以上。

　　Reverse capacitance: it is used for line scan output circuit and connected between collector and emitter of row output tube to generate high voltage line scanning sawtooth wave reverse pulse. Its withstand voltage is generally above 1500 v.

　　22.S校正電容：串接在偏轉(zhuǎn)線圈回路中,用于校正顯象管邊緣的延伸線性失真。

　　S correction capacitor: connected in series in the deflection coil loop to correct the extended linear distortion at the edge of the picture tube.

　　23.自舉升壓電容：利用電容器的充、放電儲(chǔ)能特性提升電路某點(diǎn)的電位,使該點(diǎn)電位達(dá)到供電端電壓值的2倍。

　　Bootstrap boost capacitor: the potential of a point in the circuit is raised by using the energy storage characteristics of the capacitor during charging and discharging, so that the potential at this point is twice the voltage value at the power supply terminal.

　　24.消亮點(diǎn)電容：設(shè)置在視放電路中,用于關(guān)機(jī)時(shí)消除顯象管上殘余亮點(diǎn)的電容。

　　Bright spot elimination capacitance: it is set in the video amplifier circuit and used to eliminate the residual bright spot on the display tube when shutting down.

　　25.軟啟動(dòng)電容：一般接在開關(guān)電源的開關(guān)管基極上,防止在開啟電源時(shí),過大的浪涌電流或過高的峰值電壓加到開關(guān)管基極上,導(dǎo)致開關(guān)管損壞。

　　Soft start capacitor: it is generally connected to the switch tube base of the switching power supply to prevent the switch tube from being damaged due to excessive surge current or high peak voltage added to the switch tube base when the power is turned on.

　　26.啟動(dòng)電容：串接在單相電動(dòng)機(jī)的副繞組上,為電動(dòng)機(jī)提供啟動(dòng)移相交流電壓,在電動(dòng)機(jī)正常運(yùn)轉(zhuǎn)后與副繞組斷開。

　　Starting capacitor: it is connected in series on the secondary winding of single-phase motor to provide the motor with starting phase-shifting AC voltage, which is disconnected from the secondary winding after normal operation of the motor.

　　27.運(yùn)轉(zhuǎn)電容：與單相電動(dòng)機(jī)的副繞組串聯(lián),為電動(dòng)機(jī)副繞組提供移相交流電流。在電動(dòng)機(jī)正常運(yùn)行時(shí),與副繞組保持串接。

　　Operating capacitance: it is connected in series with the secondary winding of a single-phase motor to provide phase-shifting AC current for the secondary winding of the motor. When the motor is in normal operation, it is connected with the secondary winding in series.

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