Analysis of the Meaning of Different Capacitors in Different Circuits

- Oct 25, 2018-

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

It is 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 capable of expanding the frequency range of the oscillating signal, which is auxiliary in parallel with the main capacitor

9. Reverse-pass capacitor

It is connected between the collector and the emitter of the row output tube to generate a capacitance for the line scan saw tooth 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

It is 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 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. Clapp 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. QSSO

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. Starting 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.

22. 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.

 

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