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videosystems electrical components are components that can convert electrical energy into magnetic energy and store it. The structure of an inductor is similar to that of a transformer, but it has only one winding. An inductor has a certain inductance and only impedes changes in current. If the inductor is in a state with no current flowing through it, it will attempt to impede current flow when the circuit is closed; if the inductor is in a state with current flowing through it, it will attempt to maintain the current unchanged when the circuit is opened. Inductors are also known as chokes, reactors, and dynamic reactors.

videosystems electrical component parameters

1. Voltage temperature coefficient: refers to the rate of change of the nominal voltage of a varistor within a specified temperature range, i.e., the relative change in voltage across the varistor when the temperature changes while the current through the varistor remains constant. 2. Current temperature coefficient: refers to the relative change in current flowing through the varistor when the temperature changes while the voltage across the varistor remains constant. 3. Nominal voltage: refers to the voltage value across the varistor when DC current flows through it. 4. Voltage ratio: refers to the ratio of the voltage generated by the current of the varistor to the voltage generated by the current of the varistor. 5. Maximum limiting voltage: refers to the highest voltage value that can be withstand across the varistor. 6. Leakage current: Leakage current, also known as standby current, refers to the current flowing through the varistor under specified temperature and maximum DC current conditions. 7. Residual voltage ratio: When the current through the varistor is at a certain value, the voltage generated across it is called the residual voltage for that current value. The residual voltage ratio is the ratio of residual voltage to nominal voltage. 8. Surge current capacity: Surge current capacity, also known as surge current, refers to the maximum pulse (peak) current value allowed to pass through the varistor under specified conditions (specified time intervals and number of times, applying standard impulse current). 9. Static capacitance: refers to the inherent capacitance of the varistor itself. 10. Insulation resistance: refers to the resistance value between the leads (pins) of the varistor and the insulating surface of the resistive body. 18. Voltage nonlinearity coefficient: refers to the ratio of the static resistance value to the dynamic resistance value of the varistor under a given applied voltage.

videosystems electrical component classification

Printed circuit boards are divided into three major categories based on the number of layers: single-sided boards, double-sided boards, and multi-layer boards. First is the single-sided board, where components are concentrated on one side of the basic PCB, and conductors are concentrated on the other side. Because conductors appear only on one side, this type of PCB is called a single-sided printed circuit board. Single-sided boards are usually simple to manufacture and low in cost, but their disadvantage is that they cannot be used for overly complex products. Double-sided boards are an extension of single-sided boards; when single-layer wiring cannot meet the needs of electronic products, double-sided boards must be used. Both sides have copper cladding and traces, and vias can be used to connect circuits between the two layers, forming the required network connections. Multi-layer boards refer to printed circuit boards formed by laminating more than three conductive graphic layers with insulating materials in between, with interconnections between the conductive graphics as required. Multi-layer printed circuit boards are the product of the development of electronic information technology towards high speed, multi-functionality, large capacity, small volume, thin profile, and light weight. Printed circuit boards are divided by characteristics into flexible boards (FPC), rigid boards (PCB), and rigid-flex boards (FPCB).

videosystems electrical component characteristics

Sensitivity refers to the ratio of the change in output to the change in input of a sensor under steady-state operating conditions. It is the slope of the output-input characteristic curve. If there is a linear relationship between the sensor's output and input, then the sensitivity S is a constant. Otherwise, it will vary with changes in the input quantity. The dimension of sensitivity is the ratio of the dimensions of the output and input quantities. When the dimensions of the sensor's output and input quantities are the same, sensitivity can be understood as the amplification factor. Increasing sensitivity can yield higher measurement accuracy. However, the higher the sensitivity, the narrower the measurement range, and stability is often poorer.

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