CM6460-105

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Common Mode Chokes (CMC), also known as common mode filters and line filters, are used to control the high frequency signals from transmitter lines, which are either harmonics or noise, from interfering with the signal. The CM6460-105 is a common mode choke that is widely used in digital signal and Ethernet networks due to its excellent characteristics, such as low DC resistance and excellent common mode noise attenuation. This article will discuss the application field and working principle of the CM6460-105.

The CM6460-105 is a three-wire in line common mode filter. It is suitable for balanced-mode transmission lines with signal frequencies ranging from 10K Hz to 30MHz. It can be used for data communication circuits, power line communication circuits and instruments, such as communication analyzers, phantom power supplies, and data acquisition systems. The CM6460-105 is also used to reduce common mode interference in signal lines. The device is designed to provide up to 40dB of common mode noise attenuation over the entire frequency range.

The CM6460-105 is composed of three components: the core, the coil and the resistor. The core is made of ferrite material, which is designed to provide a low reluctance path for the current. The coil is wound in a single-layer helical pattern and it works together with the core to produce the magnetic flux necessary for the noise attenuation. The resistor is placed between the coil and the ground in order to dissipate energy derived from the common mode current.

The common mode noise attenuation of the CM6460-105 is determined by its frequency response curve. The frequency response curve is a graph that shows the relationship between the noise attenuation and the signal frequency. The noise that is attenuated is referred to as the power line harmonic frequencies, which are present in the range of 10K Hz to 100K Hz. At frequencies greater than 100K Hz, the noise attenuation begins to decrease. The resonant frequency of the device is 2.0MHz, which is the frequency at which the maximum noise attenuation is achieved.

The working principle of the CM6460-105 is based on the principle of induction. When an alternating current flows through the core of the common mode choke, a magnetic field is created. The magnetic field is then applied to the coil, which in turn generates an electric field. This electric field is then applied to the resistor, which dissipates the energy derived from the common mode signal. This is how the CM6460-105 reduces the noise that is present in the signal lines.

In conclusion, the CM6460-105 is a three-wire in line common mode filter that is used for controlling the harmonics and noise in signal lines. The device is composed of a core, coil and resistor and works on the principle of induction. The frequency response curve of the device shows that the maximum noise attenuation is achieved at 2.0MHz. It is suitable for balanced-mode transmission lines with signal frequencies ranging from 10K Hz to 30MHz and is widely used in digital signal and Ethernet networks.

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