1234F-000

EMI/RFI filters, also referred to as LC, RC networks, are a type of device used to filter electromagnetic interference (EMI) and radio frequency interference (RFI). They are designed to prevent interference from entering the power line or other components in an electrical system from radios, antennas, digital signal processing, etc. 1234F-000 is an example of an EMI/RFI filter which is used in industrial and medical applications for reducing noise in signal chains.

Introduction

The 1234F-000 filter is designed to provide high-frequency filtering capability in power and signal lines. It is an oscilloscope-style linear filter that uses a capacitance-based circuit to provide two or four pole low-pass filtering from DC to greater than 2MHz. This allows it to be used in a wide range of applications, from medical equipment to industrial sensors. Additionally, its lowE capacitive load allows it to be used in high-impedance circuits with minimal noise and distortion.

Applications

The 1234F-000 is commonly used in medical and industrial applications to reduce noise in signal chains. In medical applications, the filters are used to reduce noise in ECG and EEG signals, to reduce noise in imaging systems, and to protect ECU and implantable electronics systems from EMI. In industrial applications, they are used to reduce noise and harmonics in control systems, such as monitoring air and water flow, pressure, temperature, and liquid level in tanks. They can also be used for RFI shielding in industrial applications.

Working Principle

The 1234F-000 uses a capacitance-based circuit to provide low-pass filtering from DC to greater than 2MHz. This is achieved by combining an inductor with a capacitor, creating an LC circuit. The inductor stores energy, while the capacitor provides a path for the energy to be transferred. The combination of the two components creates a filter with a frequency-dependent response.The frequency-dependent response of the 1234F-000 filter depends on the size of the capacitor and inductor used and the type of network used. The filter can be configured as either a two or four pole low-pass filter. The two pole filter provides moderate high-frequency attenuation and is more suitable for applications where high-frequency noise is not a major issue. The four pole filter provides significant high-frequency attenuation and is better suited for applications with high-frequency noise issues.

Conclusion

The 1234F-000 EMI/RFI filter is a high-performance filter used in industrial and medical applications. It is designed to provide high-frequency filtering capability in power and signal lines. It uses a capacitance-based LC circuit to provide two or four pole low-pass filtering from DC to greater than 2MHz. The filter can be used in a wide range of applications to reduce noise and harmonics in control systems or to provide EMI shielding.

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1234AS-H-1R2N=P3	Murata Elect...	0.0 $	1000	FIXED IND1.2H Shielded Wi...
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