KNH16C104DA5TS Filters

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EMI/RFI filters are electrical circuits used to protect sensitive electronic equipment from electrical noise. The KNH16C104DA5TS application field and working principle are an example of such a filter.

This filter consists of an inductor and a capacitor network, arranged in an LC (inductor-capacitor) configuration, and connected across the power lines of the electronic device. The inductors form a low-pass filter which passes direct current without significant attenuation, but which acts to reduce the effective amplitude of radio frequency signals which are present on the power lines (due to electro-magnetic interference), by providing impedance. The capacitor portion of the filter acts to further reduce RF signals by forming a bypass circuit for current (which again is provided through electro-magnetic interference).

This two-part filtering effect means that the filter will limit the amount of interference that is picked up by the equipment, reducing the possibility of errors being caused by stray electrical signals. The filter also helps to reduce the amount of noise being generated by the equipment, so that nearby electrical devices are unaffected by it.

The filter\'s effectiveness is directly related to the values chosen for the inductance and capacitance. The filter should be designed and manufactured to ensure that it is optimised for the particular environment in which it is to be used. Generally, the filter should be designed to have a high impedance over the frequency range where interference is likely to occur.

The KNH16C104DA5TS filter is designed for use in a variety of applications. It can be used in a wide range of high frequency electronic systems, such as radio transmitters and receivers, computer networks, microwave ovens, and other high-frequency apparatus. It can also be used to reduce the radiation from digital systems, such as mobile phones, and for high frequency medical and dental equipment. Its low frequency response can be used in the control of motor speed, for supplying clean, regulated DC power, and for eliminating electronic noise in industries such as aerospace, automotive and telecommunications.

The filter\'s principal operation is very straightforward. When an electro-magnetic field is generated by a device, the odd-order harmonics of the frequency of the device create a low-frequency current which travels along the power supply lines. This current induces a voltage in the coil, which opposes the voltage across the circuit and reduces the amplitude of the electromagnetic interference. At the same time, the capacitor in the circuit shunts the RF current to ground, further reducing the interference. Since the filter is tuned to operate in a specific frequency band, it will not significantly affect the operation of the device, or cause any distortion of the signal.

The KNH16C104DA5TS application field and working principle illustrate how an effective filter can be used to limit the amount of interference that is picked up by electronic devices, and to reduce any noise generated by them. Such filters can be used to improve the quality of the power supply to the equipment, and to reduce the electromagnetic radiation emitted by the system.

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