TWI475804B - A filter circuit and a electrical connector including the filter circuit - Google Patents

Description

Filter circuit and electrical connector using filter circuit

The present invention relates to a filter circuit and an electrical connector using the same, and more particularly to a component of the filter circuit.

For prior art, please refer to US Patent No. 7,123,117, published on October 17, 2006. The patent discloses a filter circuit for an electrical connector comprising a common mode suppressor and a transformer, the center tap of the transformer being electrically connected to the resistor and the capacitor and grounded. In the filter circuit of the network electrical connector (RJ 45), the BOB-SMITH circuit composed of the center tap of the transformer and the resistor and the capacitor is a conventional technique. However, the presence of resistors and capacitors increases the cost of the network electrical connector (RJ45). As technology evolves, the cost of the network connector (RJ45) needs to be reduced.

The technical problem to be solved by this creation is to provide an electrical connector that reduces the production cost of the filter circuit.

In order to solve the above problems, the present invention provides a filter circuit having a first side and a second side which are mutually input and output ends, and a plurality of transformers are disposed between the first side and the second side, and a plurality of transformers are connected The mode suppressor has no resistors or capacitors between the first side and the second side.

Compared with the prior art, the filter circuit of the present invention uses a conventional technical resistor and The capacitor is omitted, overcoming the technical bias, and still achieving the beneficial effect of reducing the cost based on all the functions of the original filtering.

In order to solve the above problems, the present invention provides an electrical connector including a filter circuit having first and second sides that are input and output ends, and between the first side and the second side. A complex transformer, and a common mode suppressor connected to the plurality of transformers, having no resistors or capacitors between the first side and the second side.

Compared with the prior art, the filter circuit of the present invention omits the resistors and capacitors of the conventional technology, overcomes the technical bias, and can still achieve the beneficial effects of cost reduction on the basis of all the functions of the original filtering. By using the electrical connector of the filter circuit, the cost reduction effect can be achieved.

100‧‧‧Filter circuit

10‧‧‧ first side

20‧‧‧ second side

30‧‧‧Transformers

301‧‧‧First coil

3011, 3012‧‧‧ first outer end

3013‧‧‧First Center Tap

302‧‧‧second coil

3021, 3022‧‧‧ second outer end

3023‧‧‧second center tap

40‧‧‧Common mode suppressor

401‧‧‧third coil

402‧‧‧fourth coil

43‧‧‧ first end

45‧‧‧ second end

50‧‧‧ Grounding terminal

60‧‧‧Separator

200‧‧‧Electrical connector

201‧‧‧Mask housing

The first figure is a circuit diagram of a filter circuit in accordance with the present creation.

The second figure is a perspective view of an electrical connector including the filter circuit shown in the first figure.

The third figure is a partially exploded view of the electrical connector shown in the second figure.

Referring to the first figure, a filter circuit 100 conforming to the present invention is disclosed, having a first side 10 and a second side 20 which are mutually input and output. The first side 10 is connected to the cable assembly by a cable end (CABLE SIDE), and the second side 20 is connected to an external circuit board by a physical end (PHY SIDE). A plurality of transformers 30 and a common mode suppressor 40 electrically connected to the plurality of transformers 30 are disposed between the first side 10 and the second side 20 .

The transformer 30 includes a first coil 301 and a second coil 302 coupled to each other, the first coil 301 is provided with two first outer ends 3011, 3012 and a first center between the two first outer ends 3011, 3012 a tap 3013, the second coil 302 is provided with two Second outer ends 3021, 3022 and a second center tap 3023 between the two second outer ends 3021, 3022. The first outer ends 3011, 3012 of the first coil are coupled to the first side 10. The filter circuit 100 is further provided with a ground terminal 50, and there is no capacitor between the ground terminal 50 and the first center tap 3013. The first center tap 3013 and the ground end 50 are provided with a capacitor-like separating device 60. The second center tap 3023 is directly connected to the second side 20, and there is no capacitor between the second center tap 3023 and the second side 20.

The common mode suppressor 40 includes a third coil 401 and a fourth coil 402. The two ends of the third coil 401 and the fourth coil 402 form a first end 43 and a second end 45. The first end 43 is connected to the first end 43. The second outer ends 3021, 3022 of the second coil are connected to the second side 20.

Referring to the second to third figures, the electrical connector 200 is shown as a network electrical connector to which the aforementioned filter circuit 100 is applied. The electrical connector 200 includes an internal circuit board (not labeled) and a metal shield housing 201 that is mounted to an internal circuit board to form the filter circuit 100. The internal circuit board is provided with a first conductive sheet 203 and a second conductive sheet 204 which are separately disposed. The metal mask case 201 is provided with a barb 205. The second conductive piece 204 is connected to the barb 205 and grounded by a grounding leg below the mask case 201. The first conductive sheet 203 and the second conductive sheet 204 are separated by a certain distance to form a capacitor-like separating device 60 as shown in the first figure. The ground terminal 50 shown in the first figure is formed by grounding the grounding leg of the metal mask case 201.

The conventional technique is that the center tap of the transformer 30 or the three-wire common mode suppressor 40 is connected to the resistor and the capacitor and grounded. By omitting the resistors and capacitors, this creation achieves the technical effect of cost reduction on the basis of ensuring all the original functions. In addition, the present invention forms a capacitor-like capacitor by a distance between two conductive sheets on the circuit board. Device for high voltage discharge. This creation overcomes the technical bias that the prior art has long believed that resistors and capacitors cannot be omitted, and achieves the beneficial effect of reducing the generation cost.

10‧‧‧ first side

100‧‧‧Filter circuit

20‧‧‧ second side

30‧‧‧Transformers

301‧‧‧First coil

3011, 3012‧‧‧ first outer end

3013‧‧‧First Center Tap

302‧‧‧second coil

3021, 3022‧‧‧ second outer end

3023‧‧‧second center tap

40‧‧‧Common mode suppressor

401‧‧‧third coil

402‧‧‧fourth coil

43‧‧‧ first end

45‧‧‧ second end

50‧‧‧ Grounding terminal

60‧‧‧Separator

Claims (8)

A filter circuit having: a first side and a second side, wherein the first side and the second side are an input end and an output end; a plurality of transformers, the complex transformer is located between the first side and the second side; a mode suppressor, the complex common mode suppressor being coupled to the complex transformer and located between the first side and the second side; wherein the first side and the second side do not have a resistor or a capacitor, the transformer includes a first coil and a second coil coupled to each other, the first coil is provided with two first outer ends and a first center tap between the two outer ends, and the filter circuit further comprises a ground end, the first There is no capacitor between a center tap and the ground. The filter circuit of claim 1, wherein a partitioning device having a capacitance function is disposed between the first center tap and the ground. The filter circuit of claim 1, wherein the second coil is provided with two second outer ends and a second center tap between the two outer ends, the second center tap is directly connected to On the second side, there is no capacitor between the second center tap and the second side. The filter circuit of claim 3, wherein the common mode suppressor comprises a third coil and a fourth coil, and the first end and the second end of the third coil and the fourth coil form a first end and a second end, The first end is coupled to the second outer end of the second coil, and the second end is coupled to the second side. An electrical connector includes: a filter circuit having: a first side and a second side, wherein the first side and the second side are an input end and an output end; a plurality of transformers, the complex transformer is located on the first side Between the second sides; a complex common mode suppressor connected to the complex transformer and located on the first side Between the first side and the second side, there is no resistor or capacitor, and the transformer includes a first coil and a second coil coupled to each other, and the first coil is provided with a first The filter circuit is further provided with a grounding end, and a capacitor-like separating device is disposed between the first center tap and the ground end. The electrical connector of claim 5, wherein the electrical connector comprises an internal circuit board, and the transformer and the common mode suppressor are mounted on the internal circuit board to form the filter circuit. The electrical connector of claim 6, wherein the separating device is a first conductive piece and a second conductive piece disposed separately on the inner circuit board, and the first center tap is connected to the first conductive piece. The electrical connector of claim 7, wherein the electrical connector is further provided with a grounded shield housing, and the second conductive sheet is coupled to the mask housing.