This article describes the comparison of coil mode and coil products. ※ Murata's inductors for RF circuits are called “RF Inductors†and “RF Inductorsâ€. Why use a chip inductor? As long as it is low inductance, the function of the inductor can be obtained by drawing a pattern on the circuit substrate. The benefits of using a chip inductor are explained below. Reason 1. Save space When the inductance is formed by the pattern on the circuit board (or the inner layer of the circuit board), it is basically a planar configuration. The chip inductor is a three-dimensional structure and therefore saves space compared to the pattern inductance on the circuit substrate. ※ Especially when an inductor of 10nH or more is required, it can save a lot of space. Reason 2. Simple tuning When impedance matching is performed, the inductance value may be changed multiple times for adjustment. To change the inductance of a patterned inductor, it is often necessary to change the board so it is difficult to adjust. The inductance of the chip inductor is very fine, so the matching can be adjusted by replacing the components. Reason 3. Guaranteed characteristics When the inductance is formed by the pattern on the circuit board, there is a standard deviation of the inductance characteristics due to the standard deviation of the material properties of the board and the standard deviation of the processing accuracy. The chip inductor is subjected to full inductance sorting at the factory, so that the standard deviation of the inductance value is controlled within a certain range. Therefore, it can contribute to the manufacture of a machine with stable performance.
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