Role of capacitors.
● Coupling: Capacitors used in coupling circuits are called coupling capacitors. This capacitor circuit is used in a large number of resistive-coupled amplifiers and other capacitively coupled circuits to act as a direct-circulation AC isolator.
● Filtering: Capacitors used in filtering circuits are called filtering capacitors, which are used in power supply filtering and various filter circuits.
●Decoupling: Capacitors used in decoupling circuits are called decoupling capacitors. These capacitor circuits are used in DC voltage supply circuits of multi-stage amplifiers, where decoupling capacitors eliminate harmful low-frequency cross-connections between each stage of the amplifier.
●High-frequency de-oscillation: The capacitor used in the high-frequency de-oscillation circuit is called a high-frequency de-oscillation capacitor. In an audio negative feedback amplifier, this capacitor circuit is used in order to de-oscillate possible high-frequency self-excitation to eliminate possible high-frequency whine in the amplifier.
● Resonant: The capacitor used in the LC resonant circuit is called resonant capacitor. This capacitor circuit is required in both LC parallel and series resonant circuits.
●Bypass: The capacitor used in the bypass circuit is called a bypass capacitor. If a signal in a certain frequency band needs to be removed from the signal in a circuit, a bypass capacitor circuit can be used, and depending on the frequency of the signal to be removed, there are full frequency domain (all AC signals) bypass capacitor circuits and high frequency bypass capacitor circuits.
● Neutralization: The capacitor used in a neutralization circuit is called a neutralization capacitor. This neutralizing capacitor circuit is used in radio HF and IF amplifiers, and TV HF amplifiers to eliminate self-excitation.
●Timing: Capacitors used in timing circuits are called timing capacitors. Timing capacitor circuits are used in circuits that require time control by charging and discharging capacitors, and the capacitor plays a role in controlling the size of the time constant.
●Integration: A capacitor used in an integration circuit is called an integration capacitor. In the synchronous separation circuit of potential field scan, this integral capacitor circuit is used to remove the field synchronous signal from the field composite synchronous signal.
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Pulse trigger signal.
●Compensation: The capacitor used in the compensation circuit is called compensation capacitor. In the bass compensation circuit of the mount, this low-frequency compensation capacitor circuit is used to boost the low-frequency signal in the playback signal, and in addition, there is a high-frequency compensation capacitor circuit.
● Bootstrap: The capacitor used in the bootstrap circuit is called a bootstrap capacitor. This bootstrap capacitor circuit is used in the output stage circuit of a commonly used OTL power amplifier to boost the positive half-cycle amplitude of the signal in small amounts by means of positive feedback.
● Crossover: The capacitor in the crossover circuit is called the crossover capacitor. In the speaker crossover circuit of the speaker, the crossover capacitor circuit is used in order to make the high frequency speaker work in the high frequency band, the middle frequency speaker work in the middle frequency band, and the low frequency speaker work in the low frequency band.
● Load capacitance: is the effective external capacitance with the quartz crystal resonator to determine the resonant frequency of the load. Load capacitance commonly used standard values of 16pF, 20pF, 30pF, 50pF and 100pF. load capacitance can be adjusted according to the specific circumstances to make appropriate adjustments, through the adjustment of the resonator’s operating frequency can generally be adjusted to the nominal value.
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