The correction capacitor generally refers to a capacitive device that corrects and compensates for a certain signal in the circuit. In the horizontal output circuit, there is a capacitor connected in series with the horizontal deflection coil, which is added to compensate for the extensibility distortion of the picture tube, which is usually called an S correction capacitor. S correction capacitors are used on televisions and monitors to correct image distortion caused by the difference in electronic scanning rates between the center and edge of the picture tube.

Correction capacitors are widely used in bypass, DC blocking, coupling, decoupling, pulse, logic, timing, vibration circuits, anti-interference in low-voltage occasions, and are designed for large-screen displays and color TV S correction circuits, UPS power supplies, and automotive DC motors Interference suppression power amplifier, LED lighting drive design, etc.