PEMI1QFN/CR,315 Filters

EMI/RFI filters can be important components in a wide variety of electronic applications, helping to reduce electromagnetic interference (EMI) and radio frequency interference (RFI) between high-speed circuits. This paper discusses the application field and working principle of the PEMI1QFN/CR,315, one of the main types of EMI/RFI filters.

The main application field of the PEMI1QFN/CR,315 is in high-speed circuit designs where the demands on the system can be high. This filter will help to reduce the interference generated by high-speed signals, making the electronic design more reliable and efficient. It is also suitable for use in a variety of systems, such as automotive, industrial and medical systems, which have to work reliably and efficiently under challenging conditions.

The PEMI1QFN/CR,315 EMI/RFI filter is a two-terminal, common-mode filter that is designed to attenuate common-mode signal noise on non-isolated high-speed digital signal lines. It is constructed using a combination of an inductor and a series-connected capacitor, and works by providing an AC ground to common-mode noise currents on the line. This noise current is then diverted from the signal lines and dissipated back to ground, reducing interference between the circuit components.

As the filter is provided in a small, surface-mount package, it is suitable for use in space-constrained designs, such as those found in a range of consumer electronics. This makes the PEMI1QFN/CR,315 a desirable component for a range of applications, as it can provide a cost-effective solution for improving the performance and reliability of a system.

The working principle of the PEMI1QFN/CR,315 is based on the concept of ‘barrier impedance’. This is a measure of the resistance of the filter to the passage of noise through the circuit. By providing a high-impedance barrier to the noise, the filter is able to attenuate EMI/RFI to an acceptable level. This high impedance is achieved by the use of the inductor and the series-connected capacitor, which together form a low-pass filter. This allows the low-frequency and high-frequency components of the common-mode noise signals to be filtered out, while allowing the desired signals to pass through unhindered.

In addition to providing a high-impedance barrier to the passage of noise, the PEMI1QFN/CR,315 also offers the benefit of low power loss. This is achieved through the use of the series-connected capacitor, which can resist the passage of AC currents, but allow DC currents to flow without significant power loss. This makes the filter ideal for use in applications where power efficiency is a key consideration.

Overall, the PEMI1QFN/CR,315 filter is a versatile and reliable component that is suitable for use in a range of high-speed circuit designs where the demands on the system are high. By providing a high-impedance barrier to common-mode noise signals, the filter is able to reduce EMI/RFI for improved performance and reliability. In addition, due to its small size and low power loss characteristics, the filter makes an ideal choice for designing compact, power-efficient systems.