Capacitor is an energy storage component with the characteristics of “straight through, low frequency and high frequencyâ€. In order to recognize and identify the capacitors in different circuits, it has given many names according to its role in the line. These names and functions are helpful for reading the pictures. The following electrician's home introduces the meaning of some common names.
1, filter capacitor
It is connected between the positive and negative terminals of the circuit to remove the useless alternating current in the circuit. Generally, large-capacity electrolytic capacitors are used, and other fixed capacitors are also used.
2, decoupling capacitor
It is connected between the positive and negative terminals of the circuit to prevent parasitic oscillation caused by the positive feedback path formed by the internal resistance of the power supply.
3, coupling capacitor
It is connected between the signal source and the signal processing circuit or the two-stage amplifier to block the direct current and let the alternating current or the pulsating signal pass, so that the believed DC operating point of the amplifier does not affect each other.
4, bypass capacitor
Connected to the AC or pulse signal in the AC/DC signal at both ends of the resistor or directly connected to the shared telecommunications to prevent the AC component from generating a voltage drop when passing through the resistor.
5, neutralization capacitor
Connected between the base of the triode and the collector to overcome the self-oscillation caused by the inter-electrode capacitance of the triode.
6, tank capacitance (tuning capacitor)
A capacitor connected across the resonant circuit or the coil of the oscillating circuit.
7, padding capacitor
In the circuit is able to reduce the frequency range of the oscillating signal, and significantly increase the capacitance of the low frequency end oscillation frequency, it is in series with the main circuit of the tank.
8, compensation capacitor
In the oscillating circuit, a capacitor that can widen the frequency range of the oscillating signal, which acts in parallel with the main capacitor to assist.
9, reverse-pass capacitor
Connected between the collector and the emitter of the row output tube to generate a capacitance for the line scan sawtooth wave reversal.
10, bootstrap boost capacitor
Use its energy storage to boost the circuit from a certain potential, so that its potential value is higher than the power supply voltage for this point.
11, "S" correction capacitor
Connected in series with the deflection coil circuit to correct the distortion of both sides.
12, frequency stabilization capacitor
In an oscillating circuit, a capacitor used to stabilize the oscillation frequency.
13, timing capacitor
In the RC timing circuit, the resistor R is connected in series to determine the capacitance of the length of time.
14, buck current limiting capacitor
It is connected in series in the AC circuit for it to divide and limit the capacitive reactance of the AC.
15, shorten the capacitor
This type of capacitor is a capacitor that is connected in series in the UHF tuner to shorten the length of the oscillating inductor.
16, Clappo capacitor
In the three-point oscillating circuit of the capacitor, the capacitance of the oscillating inductor is connected in series, and the frequency stability is improved for the influence of the junction capacitance of the water transport transistor.
17, the Thira capacitor
In the three-point oscillating circuit of the capacitor, the capacitor connected to both ends of the oscillating inductor coil, in order to eliminate the influence of the junction capacitance of the transistor, the oscillating frequency is more likely to start.
18, acceleration capacitor
Connected to the oscillating feedback circuit to accelerate the positive feedback process and increase the amplitude of the oscillation.
19. Pre-emphasis capacitor
In order to prevent the audio modulation signal from attenuating or losing high frequency components during modulation, the capacitance in the RC network of high frequency components is appropriately increased.
20, to increase the capacitance
The portion of the high-frequency component of the audio signal that is pre-emphasized is attenuated along with the noise, restoring the capacitance of the RC network of the original appearance of the audio signal.
21, stable capacitance
In the discriminator, used to stabilize the output signal amplitude.
22, light point capacitance
In the auxiliary circuit of the picture tube, the capacitor used to eliminate the bright spot of the shutdown.
23, phase shift capacitor
The capacitor used to change the phase of the AC signal.
24, feedback capacitor
Capacitor that is used to feed back the signal at the input and output of the amplifier
25, soft start capacitor
Usually connected to the base of the power switch tube, to prevent the surge current or voltage applied to the base of the switch when the power is turned on, and damage the switch tube.
26, start capacitor
It is connected in series with the secondary winding of the single-phase motor to provide the phase-shifting AC current for starting the secondary winding of the motor. When the motor is running normally, it is disconnected from the secondary winding.
27, running capacitor
It is connected in series with the secondary winding of the single-phase motor to provide phase-shifting alternating current for the secondary winding of the motor. When the motor is running normally, the secondary winding is still in the circuit.
AC safety ceramic capacitor
It is used to prevent antenna radio wave interference in the AC circuit of electronic equipment, prevent power supply noise of equipment such as household appliances, and prevent electric shock products such as electric shock when equipment malfunctions.
28, high frequency low voltage ceramic capacitor
The CC1 series is a class of high-frequency low-voltage ceramic capacitors used in places with low loss and high capacitance and in places where the required temperature coefficient is specified.
Such as: resonant circuit, high frequency bypass, temperature compensation, control circuit time constant components, coupling elements with high stability requirements.
The CC81 series is a class of high-frequency high-voltage ceramic capacitors used in high-voltage resonant circuits with UR≥0.63KV or higher, or used in places with low loss and capacitance stability or where the required temperature coefficient is clearly specified.
The CT1 series is a Class II low-band low-voltage ceramic capacitor used in electrical appliances with low tgs and capacity stability requirements, such as low frequency, coupling, filtering, decoupling, etc., and can also be used as a time constant component of the control circuit.
CT81 series is a class II low frequency high voltage ceramic capacitor. It is used in high voltage bypass and coupling circuit, with large dielectric constant, large capacity and low loss.
CS1 series - three types of low frequency low voltage ceramic capacitors
It is used for broadband bypass coupling in UHF and VHF circuits. It has the characteristics of high dielectric constant, small volume and large capacity.
CT82 Series - Ultra High Voltage Ceramic Capacitors
It is mostly used in high-pressure bypass with high requirements on pressure resistance. It has the characteristics of small volume, high temperature resistance, good moisture resistance and low loss.
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