CN201937554U - Filter circuit with novel structure - Google Patents

Abstract

The utility model discloses a filter circuit with a novel structure, and comprises a common mode inductor L1 and a common mode inductor L2, wherein the common mode inductor L1 is in series connection with a capacitor, the common mode inductor L2 is in parallel connection with the capacitor, accordingly a filter circuit is formed. The common mode inductor L1 and the common mode inductor L2 share a magnetic core, and the filter circuit is provided with four windings and six tappings. The filter circuit with the novel structure changes two independent inductors of conventional separators to a structure which four windings are separated by one inductors-sharing magnetic core frame, and achieves identical effect as the original separators. The novel structure saves space, reduces the number of the magnetic core, and saves cost simultaneously.

Description

A kind of filter circuit of new structure

Technical field

The utility model relates to the communications field, relates in particular to a kind of filter circuit with new structure.

Background technology

Chinese patent literature CN201114331Y discloses a kind of ADSL Splitter, be used to block the interference of ADSL high-frequency signal and telephone signal to the ADSL network, the circuit structure that this separator adopted as shown in Figure 1, adopt two independent inductance L 1` and L2` respectively, adopt two magnetic core skeletons, it is bigger to make that existing separator takes up room on volume, and the corresponding devices cost is higher, is not suitable for mass production.

The utility model content

The purpose of this utility model is to provide a kind of filter circuit with new structure, and it is simple to have a circuit, device volume compactness, the characteristics that price is lower.

For achieving the above object, the utility model is achieved through the following technical solutions:

A kind of filter circuit with new structure comprises common mode inductance L1 and L2, and it forms filter circuit with electric capacity by connection in series-parallel respectively, and the shared magnetic core of described common mode inductance L1 and L2 has six taps of four windings.

Filter circuit described in the utility model, structurally two independent inductance of conventional separators are changed to a shared magnetic core skeleton of inductance, be separated into the structure of four windings, can realize the effect identical with former separator, the space is structurally saved in this design more, and the minimizing of magnetic core also provides cost savings simultaneously.

Description of drawings

According to embodiment and accompanying drawing the utility model is described in further detail below.

Fig. 1 is the circuit structure that conventional separators adopts;

Fig. 2 is the circuit structure schematic diagram that filter circuit described in the utility model adopts.

Embodiment

As shown in Figure 2, the circuit theory diagrams of a specific embodiment of novel level shifter circuit described in the utility model have been provided.

This separator comprises common mode inductance L1 and L2, and a shared magnetic core has 1-4 six taps of totally four windings, wherein winding 3,4 respectively with capacitor C 2, C3 parallel connection, serial connection capacitor C 1 is connected with capacitor C 4 between two centre taps between the positive-negative output end, forms filter circuit jointly; Can realize the effect identical with former separator, the space is structurally saved in this design more, and the minimizing of magnetic core also provides cost savings simultaneously.

Claims (1)

1. the filter circuit with new structure comprises common mode inductance L1 and L2, and it forms filter circuit with electric capacity by connection in series-parallel respectively, it is characterized in that, the shared magnetic core of described common mode inductance L1 and L2 has six taps of four windings.

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