Low-cost balancing signal passive element

Abstract

The invention relates to a passive element and discloses a low-cost balancing signal passive element. The low-cost balancing signal passive element comprises a resistor and an inductor, wherein a resistance value of the resistor is larger than 1 ohm, and the resistor and the inductor are connected in series and packaged in the same module. The low-cost balancing signal passive element has the advantages that the passive element can be connected on positive and negative signal lines of a differential pair line in a bridged mode to achieve balancing of high-speed differential signals and enable distortion of the signals transmitted by the differential pair line to be small to the greatest extent. A group of differential pair lines can achieve signal balance only by needing at least one passive element, and original lines are not needed to break, so that the cost of import design is very low, and the low-cost balancing signal passive element has good popularizing effect and economic benefit. In addition, the structure of the passive element is simple, the volume of a whole module can be very small, and the passive element can be installed in a small-volume device. Furthermore, the passive element is connected between the positive and negative signal lines of the differential pair line in a bridged mode and has equipotent and same influence on positive and negative signals, so that asymmetry of the positive and negative signals is not increased.

Description

technical field [0001] The invention relates to a passive element, in particular to a low-cost balanced signal passive element. Background technique [0002] Currently, high-speed differential pairs are widely used, for example, in high-definition television and digital audio. When the signal is transmitted on the high-speed differential pair line, due to the attenuation characteristics of the line structure itself, the attenuation of the high-frequency signal is greater than that of the low-frequency signal, which will cause ISI (InterSymbol Interference, Intersymbol Interference), If the signal is unstable, the effective amplitude of the signal will be reduced, which will affect the receiving quality of the signal. Such as figure 1 As shown, as the length of the differential pair line increases and the signal frequency increases, the difference between high and low frequency attenuation will become more obvious, so the impact on the signal will be greater. [0003] In v...

AI Technical Summary

Problems solved by technology

First, this type of passive equalizer consists of a frequency selection network composed of multiple passive components and is integrated in the chip. The manufacturing process is relatively complicated and the cost is high; It is impossible to make the components exactly the same, and there must be certain errors, which will cause signal asymmetry on the positive and negative signal lines, thereby affecting the accuracy of signal transmission; third, the volume of such passive equalizers is usually relatively small. Larger, which requires a larger installation space, but as electronic products become increasingly miniaturized, a large passive equalizer is obviously not practical; fourth, it is necessary to interrupt the differential pair itself, and then connect it to the break. equalizer, which will cause inconvenience for users in application, and a dedicated line must be specially designed for adding this passive equalizer

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