Connection of the TV set to vga/svga to a card

The difficulty of connection vga of a videocard to the TV set is, that Frequency of lower case development(display) of the TV set makes 15 KHz, and VGA card - from 31 KHz and is higher. Translation of development(display) of the TV set up to 31 KHz practically is unreal, because of the large inductance coil and excessive parasitic capacity SPLIT.

The challenge of connecting a VGA output from a video card to a television set primarily stems from the significant difference in the horizontal refresh rates of the two devices. The VGA standard typically operates at a minimum horizontal frequency of 31 kHz, while many older television sets are designed to operate at a much lower frequency, around 15 kHz. This disparity creates compatibility issues when attempting to directly connect these two devices.

To address this issue, a viable solution involves the use of a frequency converter or a scan converter. These devices can adapt the VGA signal's higher frequency down to a level compatible with the television's input capabilities. The scan converter functions by sampling the VGA signal and re-timing it to produce a new output signal that matches the 15 kHz frequency required by the TV.

However, implementing such a solution requires careful consideration of the design parameters. The inductance of the coils and the inherent parasitic capacitance in the circuit can introduce significant challenges. High inductance coils can lead to increased reactance, which may distort the signal and result in poor image quality. Additionally, excessive parasitic capacitance can cause signal degradation and further complicate the conversion process.

When designing the circuit for this application, it is essential to ensure that all components are selected to minimize these parasitic effects. Using high-quality capacitors with low equivalent series resistance (ESR) and inductors with minimal parasitic capacitance can help maintain signal integrity. Furthermore, employing a well-designed PCB layout that minimizes trace lengths and avoids unnecessary loops can significantly reduce noise and improve overall performance.

In summary, while the connection of a VGA video card to a television set presents notable challenges due to frequency discrepancies, appropriate use of frequency conversion techniques and careful circuit design can facilitate successful integration of these two technologies.The difficulty of connection vga of a videocard to the TV set is, that Frequency of lower case development(display) of the TV set makes 15 KHz, and VGA card - from 31 KHz and is higher. Translation of development(display) of the TV set up to 31 KHz practically is unreal, because of the large inductance coil and excessive parasitic capacity SPLIT.

🔗 External reference