The so-called capacitors, the electronic component is housed and discharging the charge. The basic principle is to charge and discharge the capacitance, of course rectification, oscillation, and other effects. Further capacitor structure is very simple, and is mainly composed of two positive and negative electrodes sandwiching the dielectric composition, the capacitance is mainly determined by the type of electrode and the insulating medium.
1. The filter capacitor
It is connected between the positive and negative DC voltage, DC power does not need to filter out the AC component of the DC smoothing, typically large-capacity electrolytic capacitor, and may be simultaneously connected to other types of small-capacitance capacitor in the circuit to filter out high frequency alternating current.
2. The decoupling capacitors
And connected to the power amplifier circuit between positive and negative, to prevent the positive feedback formed by the source resistance caused by parasitic oscillation.
3. Bypass capacitor
AC and DC signals in the circuit, the capacitor and the resistor connected to the two ends of a point or a pcb circuit connected across a common potential, AC signal or a pulse signal path is provided to prevent the AC signal component due to the pressure drop through the resistor attenuation.
4. The coupling capacitor
In the AC signal processing circuit for connecting the signal source and the signal processing circuit or as a two-stage amplifier is connected between, for blocking direct current, so that a pulse signal or AC signal by the DC operating point independently of each other before and after stage amplifier circuit .
The tuning capacitor
Connected across the resonant circuit oscillation coil, the oscillation frequency of the selected functions.
6. pad capacitance
Resonant capacitor and auxiliary capacitor connected in series circuit of the main pcb, it allows adjusting the oscillation signal frequency range becomes small, and can significantly increase the oscillation frequency of the low frequency side.
And equivalent circuit of the crystal oscillator circuit
7. compensation capacitor
Auxiliary capacitor in parallel with the capacitor of the main resonant circuit, the capacitance can adjust the oscillation signal frequency range expanded.
8 and the capacitance
And connected between the base and the emitter of the transistor amplifier, negative feedback network, in order to suppress self-oscillation caused by the Transistor capacitance.
9. A frequency stabilization capacitor
In the oscillation circuit, the role of stabilizing the oscillation frequency.
10. The timing capacitor
Connected in series with a resistor R in the RC time constant circuit, together determine the length of time of charge and discharge the capacitor.
11. accelerate capacitance
A feedback circuit connected to the oscillator, the positive feedback process to accelerate and improve the amplitude of the oscillating signal.
12. shortening capacitor
In the UHF tuner circuit in order to shorten the length of the oscillating inductor and capacitor in series.
13. Ke Labo capacitance
In the three-point oscillator circuit capacitance, inductance and capacitance of the oscillating coils in series, play the role of eliminating the influence of the junction capacitance of the transistor frequency stability.
Kela Bo oscillator
14. The capacitor Thira
In the three-point capacitance oscillation circuit, the oscillation capacitor connected in parallel across the inductor coil, functions to eliminate the influence of the junction capacitance of the transistor, the oscillator in the high frequency end of the vibrating easily.
15. Leveled capacitance
In the frequency discriminator, for stabilizing the amplitude of the output signal.
16. The pre-emphasis capacitor
In order to avoid the audio signals modulated high-frequency component caused by the RC divider attenuation loss and, provided the capacitor network upgrade process.
17. The de-emphasis capacitor
To restore the original audio signal, the audio signal is required with attenuated by the high frequency noise components and pre-emphasis being lifted, set the RC network capacitance.
18. A phase-shifting capacitor
Phase alternating current signal for changing the capacitance.
19. The feedback capacitance
Between the amplifier is connected across the input and output terminals, the output signal is recirculated to the input capacitance.
20. The step-down capacitance limiting
AC circuit in series, by capacitive reactance of the AC characteristics of alternating current limiting so as to constitute the voltage dividing circuit.
21. retrace capacitance
An output circuit for line scanning, and the line connected between the collector and emitter of the output tube to produce a high pressure line scanning sawtooth pulse reverse process, the pressure generally above 1500 volts.
22.S correction capacitors
Deflection coils connected in series circuit, linearity correction for the kinescope extending edge distortion.
23. A bootstrap capacitor
By the capacitor charging and discharging characteristics of energy storage circuit to enhance the potential of a point, so that the potential of the point 2 times the supply voltage value.
24. A capacitor with highlights
Provided in the video amplifier circuit, for eliminating the residual bright spot on the kinescope capacitance during shutdown.
25. The soft-start capacitor
Usually switch connected to the base of the switching power supply, the power supply is turned on to prevent the excessive inrush current or excessive peak voltage is applied to the base of the switch, resulting in damage to the switch.
26. The start capacitor
Connected in series with the secondary winding of the single-phase motor, the phase shift providing a starting motor as the AC voltage, the secondary winding is disconnected from the motor in the normal operation.
27. Run Capacitor
And the secondary winding single-phase motor connected in series, provide a phase shift of the secondary winding alternating current motor. In normal operation the motor, connected in series with the secondary winding remains.
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