TWI509872B - Filter circuit and connector using the same - Google Patents

Description

Filter circuit and electrical connector having the same

The present invention relates to a filter circuit and an electrical connector having the same, and more particularly to a filter circuit applied to a network and an electrical connector having the filter circuit.

The announcement number of the announcement of October 17, 2006 is U.S. Patent No. 7,123,117, the first of which discloses a filter circuit having a transmission cable side and a circuit board side which are mutually input and output and connected between the two sides. The first and second signal transmission channels, the second signal transmission channel includes a transformer connected to the transmission cable side and a two-wire common mode choke connecting the transformer and the circuit board side, the transformer including the first coil and the second coil The first coil is provided with two first connection ends connected to the side of the transmission cable, and the second coil is provided with two second connection ends connected to one side of the two-wire common mode choke coil and between the two second connection ends. The center tap, the center tap of the second coil is directly connected to the board side.

The center tap of the second coil of the second signal transmission channel is directly connected to the circuit board side, when the current type driving chip connected to an external device on the circuit board side is applied, because the second coil of the second signal transmission channel The center tap is directly connected to the board side, which can cause the external device's Auto MDI/MDIX (port automatic identification function) to fail, resulting in line interruption, so the filter circuit has poor application performance.

The purpose of this creation is to provide a filter circuit with better application performance.

In order to achieve the above object, the creative filter circuit adopts the following technical solution: a filter circuit, which is provided with: transmission cable side and circuit board side which are input and output, and four transmissions between the transmission cable side and the circuit board side. a channel and at least one first core coil, each of the transmission channels includes a transformer connected to the transmission cable side and a two-wire common mode choke connecting the transformer and the circuit board side, the transformer including a first coil and a second coil, The first coil is provided with two first connection ends connected to the side of the transmission cable, and the second coil is provided with two second connection ends connecting the two-wire common mode choke coil and a center tap between the two connection ends. The center tap of the second coil of each transmission channel is electrically connected to the board side by the first core coil.

In order to achieve the above object, the creative filter circuit can also adopt the following technical solution: a filter circuit, which is provided with: a transmission cable side and a circuit board side which are input and output of each other, and at least one transformer and connection connected to the transmission cable side. a signal transmission channel of the two-wire common mode choke coil of the transformer and the circuit board side, and at least one first core coil, the transformer includes a first coil and a second coil, and the first coil is connected to the side of the transmission cable Two first connecting ends, the second coil is provided with two second connecting ends connecting the two-wire common mode chokes and a center tap between the two connecting ends, and the center tap of the second coil of the transmission channel passes The first core coil is electrically connected to the board side.

Compared with the prior art, the present filter circuit has the following progress: since the center tap of the second coil of the signal transmission channel is electrically connected to the circuit board side through the first core coil, when the filter circuit is matched with the current type of an external device When the driver chip is applied, the signal transmission channel does not affect the Auto MDI/MDIX (port automatic identification function) of the external device, so the application performance of the authoring filter circuit is better than the prior art.

Another object of the present invention is to provide an electrical connector with better application performance.

In order to achieve the above object, the present invention has the following technical solutions: an electrical connector provided with: a docking terminal for interfacing with a pair of connectors, and an electrical connection for connecting the electrical connector to an external circuit board. a foot terminal, a signal processing module, and at least one first core coil, the signal processing module includes at least one transformer electrically connected to the docking terminal and a two-wire common mode connecting the transformer and the pin terminal The signal transmission channel of the flow ring, the transformer comprises a first coil and a second coil, the first coil is provided with two first connection ends electrically connected to the docking terminal, and the second coil is provided with two two-wire common mode choke coil a second connection end and a center tap between the two second connection ends, and a center tap of the second coil of the signal transmission channel is electrically connected to the pin terminal through the first core coil.

In order to achieve the above object, the present invention can also adopt the following technical solution: an electrical connector provided with: a docking terminal for interfacing with a pair of connectors for connecting the electrical connector to an external circuit board The pin terminal, the signal processing module, and the at least one first core coil, the signal processing module is connected to the docking terminal and the pin terminal, and the signal processing module is provided with four signal transmission channels, each of the signal transmission channels includes a a transformer electrically connected to the mating terminal and a two-wire common mode choke connected to the transformer and the pin terminal, the transformer includes a first coil and a second coil, and the first coil is provided with two electrically connected to the mating terminal a first connecting end, the second coil is provided with two second connecting ends connecting the two-wire common mode choke coil and a center tap between the two connecting ends, and the center tap of the second coil of each of the signal transmission channels Electrically connected to the pin terminal by the first core coil.

The center tap of the second coil of the present electrical connector is electrically connected to the pin terminal through the first core coil, and when the electrical connector is applied with the current type driving chip of an external device connected to the pin terminal, The center of the second coil of the signal transmission channel The tap is electrically connected to the pin terminal through the first core coil, and the signal transmission channels do not affect the Auto MDI/MDIX (port automatic identification function) of the external device, and overcome the defects of the signal transmission channel of the background art. Therefore, the application performance of the present electrical connector is better.

The present invention will be further described below in conjunction with the drawings and embodiments.

1, 2, 3, 4‧‧‧ filter circuit

100‧‧‧Transmission cable side

200‧‧‧Circuit board side

11‧‧‧Signal transmission channel

15‧‧‧Gap discharge circuit

20, 91‧‧‧ Transformers

21‧‧‧First coil

210, 910‧‧‧ first connection

211, 221, 912 ‧ ‧ center tap

22‧‧‧second coil

220, 911‧‧‧ second connection

30, 92‧‧‧Two-wire common mode choke

40, 94‧‧‧First core coil

41‧‧‧third coil

42‧‧‧fourth coil

5‧‧‧Electrical connector

6‧‧‧Insulated body

61‧‧‧Network interface

62‧‧‧USB interface

8‧‧‧Terminal module

81‧‧‧Docking terminal

82‧‧‧ pin terminal

9‧‧‧Signal Processing Module

93‧‧‧Sub Board

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

The second drawing is a circuit diagram of the filter circuit in accordance with the second embodiment of the present creation.

The third diagram is a circuit diagram of a filter circuit in accordance with the third embodiment of the present creation.

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

The fifth figure is a perspective view of the electrical connector in accordance with the present creation.

The sixth drawing is a perspective view of the terminal module of the electrical connector of the present invention at an angle and conforming to the circuit diagrams shown in the first to fourth figures.

The seventh figure is a perspective view of the circuit diagram of the electrical connector of the present invention at another angle and conforming to the circuit diagram shown in the first figure.

The eighth figure is a perspective view of the terminal block of the electrical connector of the present invention at another angle and conforming to the circuit diagram shown in the second figure.

The ninth drawing is a perspective view of the terminal module of the electrical connector of the present invention at another angle and conforming to the circuit diagram shown in the third figure.

The tenth figure is a perspective view of the circuit diagram of the electrical connector of the present invention at another angle and conforming to the circuit diagram shown in the fourth figure.

Referring to the first figure, the filter circuit 1 according to the first embodiment of the present invention is a network interface circuit, and the filter circuit 1 has a transmission cable side 100 and a circuit board side 200 which are input and output of each other and are connected thereto. Four signal transmission channels 11 between the sides. Each of the signal transmission channels 11 includes a transformer 20 connected to the transmission cable side 100 and a two-wire common mode choke 30 connecting the transformer 20 and the circuit board side 200. The transformer 20 includes a first coil 21 and a second coil 22, and the first coil 21 and the second coil 22 are coupled to each other. The first coil 21 is provided with two first connection ends 210 connected to the transmission cable side 100 and a center tap 211 between the two first connection ends 210. The center tap 211 of the first coil 21 of each signal transmission channel 11 is short. After being connected to a gap discharge circuit 15, it is grounded. The second coil 22 is provided with two second connecting ends 220 connecting the two-wire common mode choke coil 30 and a center tap 221 between the two second connecting ends 220. The filter circuit 1 is further provided with two first core coils 40, the first core coil 40 is a two-wire core coil, and the first core coil 40 includes a magnetic core (not labeled) and surround The third coil 41 and the fourth coil 42 on the magnetic core, and the third coil 41 and the fourth coil 42 are coupled to each other. The center tap 221 of the second coil 22 of one of the signal transmission channels 11 is connected to the circuit board side 200 through the third coil 41 of one of the first core coils 40, wherein the second coil 22 of the other signal transmission channel 11 The center tap 221 is connected to the circuit board side 200 through the fourth coil 42 of the one of the first core coils 40, wherein the center tap 221 of the second coil 22 of the third signal transmission channel 11 corresponds to the other first The third coil 41 of the core coil 40 is connected to the circuit board side 200, wherein the center tap 221 of the second coil 22 of the fourth signal transmission channel 11 corresponds to the fourth coil 42 passing through the other first core coil 40. Connected to the board side 200. In this embodiment, each of the third coils 41 and one end of each of the fourth coils 42 corresponding to the circuit board side 200 are all short-circuited and then connected to the circuit board side 200, thus facilitating reduction. The number of 200 line outlets on the board side.

Referring to the second figure, the filter circuit 2 of the second embodiment of the present invention is disclosed. The filter circuit 2 also has a transmission cable side 100 and a circuit board side 200 which are mutually input and output and are connected between the two sides. Four signal transmission channels 11. The filter circuit 2 is different from the filter circuit 1 in that the filter circuit 2 is provided with a first core coil 40, and the center tap 221 of the second coil 22 of the two signal transmission channels 11 of the filter circuit 2 passes through the first The third coil 41 of the core coil 40 is connected to the board side 200, and the center tap 221 of the second coil 22 of the other two signal transmission channels 11 is connected to the board side 200 by the fourth coil 42 of the first core coil 40. The third coil 41 of the filter circuit 2 and the fourth coil 42 are short-circuited to one end of the circuit board side 200 and then connected to the circuit board side 200. Thus, the number of circuit-side terminals of the circuit board side 200 is also reduced.

Referring to the third embodiment, the filter circuit 3 according to the third embodiment of the present invention also has a transmission cable side 100 and a circuit board side 200 which are mutually input and output and are connected between the two sides. Four signal transmission channels 11. The filter circuit 3 is different from the filter circuit 1 in that the filter circuit 3 is provided with a first core coil 40, and the filter circuit 3 has a center tap 221 of the second coil 22 of the three signal transmission channels 11 The third coil 41 of a core coil 40 is connected to the board side 200, and the center tap 221 of the second coil 22 of the remaining one of the signal transmission channels 11 is connected to the board side 200 by the fourth coil 42 of the first core coil 40. . In this embodiment, one end of the third coil 41 and the fourth coil 42 corresponding to the circuit board side 200 is short-circuited and then connected to the circuit board side 200. Thus, the number of circuit-side terminals of the circuit board side 200 is also reduced.

Referring to the fourth embodiment, the filter circuit 4 according to the fourth embodiment of the present invention is The filter circuit 4 also has a transmission cable side 100 and a circuit board side 200 which are mutually input and output, and four signal transmission channels 11 connected between the two sides. The filter circuit 4 is different from the filter circuit 1 in that the filter circuit 3 is provided with a first core coil 40, and the center taps 221 of the second coils 22 of the four signal transmission channels 11 of the filter circuit 3 are both passed. The third coil 41 of the first core coil 40 is connected to the board side 200.

In combination with the filter circuits of the above four embodiments, the center tap 221 of the second coil 22 of each of the signal transmission channels 11 is electrically connected to the circuit board side 200 through the first core coil 40, and the filter circuit may be provided with at least one The first core coil 40, such as four. In addition, the number of the signal transmission channels 11 of the filter circuit may be at least one that satisfies the need, and is not limited to four. The first core coil 40 is not limited to a two-wire core coil, which may be a single wire or other multi-wire core coil. The magnetic core of the first core coil 40 may be a ferrite core or other type of magnetic core, and the coil of the first core coil 40 may be wound by an enamel wire or a spiral metal ring or connected by a conductive material.

The center tap 221 of the second coil 22 of each of the signal transmission channels 11 of the present filter circuit is electrically connected to the circuit board side 200 through the first core coil 40, and the first core coil 40 has a certain electromagnetic interference suppression function, thereby As a whole, the filter circuit has strong electromagnetic interference suppression performance; and when the filter circuit is applied to the current-type drive chip of the external device, the center tap 221 of the second coil 22 of the signal transmission channel 11 is electrically passed through the first core coil 40. The connection to the board side 200 does not affect the Auto MDI/MDIX (port automatic identification function) of the external device, and overcomes the defects of the signal transmission channel of the background art. Therefore, the application performance of the authoring filter circuit is good.

Referring to the fifth to seventh figures, in order to comply with the present invention, the electrical connector 5 having the filter circuit 1 is a network connector (RJ45) and a USB connector stack connector, which includes a Insulating body 6, shielding housing 7 covering the insulating body 6 And a terminal module 8 mounted on the insulative housing 6. The insulative housing 6 includes a network interface 61 and two USB interfaces 62. The terminal module 8 is provided with a docking terminal 81 (corresponding to the transmission cable side 100) extending to the network interface 61 and docking with a mating connector (not shown) for connecting the electrical connector 5 to an external circuit board (not The pin terminal 82 (corresponding to the board side 200) of the drawing) and the signal processing module 9 that connects the mating terminal 81 and the pin terminal 82. The signal processing module 9 includes a sub-board 93 soldered to the mating terminal 81 and the pin terminal 82, four transformers 91 disposed on the sub-board 93 and electrically connected to the mating terminal 81, and disposed on the sub-board There are four two-wire common mode chokes 92 on one side and two first core coils 94 disposed on the opposite side of the sub-board 93. Each of the two-wire common mode chokes 92 is connected to a transformer 91 to a pin terminal 82. The sub-board 93 is provided with a plurality of conductive sheets and conductive lines for connecting the butt terminal 81, the transformer 91, the two-wire common mode choke 92, the pin terminal 82, and the first core coil 94 to form the filter circuit 1. The four transformers 91 and the four two-wire common mode chokes 92 form four signal transmission channels (corresponding to four signal transmission channels 11). Specifically, each of the signal transmission channels includes an electrical connection to the docking terminal. A transformer 91 of 81 and a two-wire common mode choke 92 connecting the transformer 91 and the pin terminal 82. The transformer 91 includes a first coil (not labeled, corresponding to the first coil 21) and a second coil (not labeled, corresponding to the second coil 22). The first coil is provided with two first connecting ends 910 electrically connected to the mating terminal 81. . The second coil is provided with two second connecting ends 911 connecting the two-wire common mode chokes 92 and a center tap 912 between the two second connecting ends 911. The first core coil 94 is a two-wire core coil, and the first core coil 94 includes a magnetic core (not shown) and a third coil surrounding the magnetic core (not shown, corresponding to the third coil 41) The fourth coil and the fourth coil are coupled to each other with a fourth coil (not shown, corresponding to the fourth coil 42). The center taps 912 of the second coils of the two signal transmission channels are correspondingly passed through the third coil and the fourth of the one of the first core coils 94. The coil is connected to the pin terminal 82, and the center taps 912 of the second coils of the other two signal transmission channels are connected to the pin terminals 82 through the third and fourth coils of the other first core coil 94. .

Referring to FIG. 5, FIG. 6 and FIG. 8 , the electrical connector 5 having the filter circuit 2 conforming to the present invention is different from the electrical connector 5 having the filter circuit 1 in that the signal processing module 9 A first core coil 94 is provided, and a center tap 912 of the second coil of the two signal transmission channels is connected to the pin terminal 82 through a third coil of the first core coil 94, the other two The center tap 912 of the second coil of the signal transmission channel is connected to the pin terminal 82 corresponding to the fourth coil through the first core coil 94.

Referring to the fifth, sixth and ninth diagrams, the electrical connector 5 having the filter circuit 3 according to the present invention is different from the electrical connector 5 having the filter circuit 1 in that the signal processing module 9 A first core coil 94 is provided, and a center tap 912 of the second coil of the three signal transmission channels is connected to the pin terminal 82 through a third coil of the first core coil 94, the remaining one signal The center tap 912 of the second coil of the transmission channel is connected to the pin terminal 82 corresponding to the fourth coil through the first core coil 94.

Referring to FIG. 5, FIG. 6 and FIG. 10, the electrical connector 5 having the filter circuit 4 according to the present invention is different from the electrical connector 5 having the filter circuit 1 in that the signal processing module 9 A first core coil 94 is provided, and a center tap 912 of the second coil of the four signal transmission channels is connected to the pin terminal 82 through a third coil of the first core coil 94.

In the above four embodiments of the present invention, the first core coil 94 is a two-wire core coil, the two-wire common mode choke 92 and the first core coil. The 94 is an electronic module that is independent of each other and is surface-mounted on the sub-board 93. The surface-mounted two-wire magnetic core coil is easy to manufacture and install, and is advantageous in reducing cost and occupying a small space.

For the present electrical connector, the center tap 912 of the second coil of each signal transmission channel of the electrical connector 5 is connected to the pin terminal 82 through the first core coil, and the signal processing module 9 can be provided with at least one The first core coil 94, such as four. In addition, the number of the signal transmission channels of the signal processing module 9 may be at least one that satisfies the need, and is not limited to four. The first core coil 94 is not limited to a two-wire core coil, which may be a single wire or other multi-wire core coil. The core of the first core coil 94 may be a ferrite core or other type of magnetic core, and the coil of the first core coil 94 may be wound by an enamel wire or a spiral metal ring or connected by a conductive material.

The center tap 912 of the second coil of the present electrical connector is electrically connected to the pin terminal 82 through the first core coil 94, and the first core coil 94 has a certain electromagnetic interference suppressing function, thereby suppressing the electrical connector as a whole. The electromagnetic interference performance is strong; and when the electrical connector is applied with the current-type driving chip of an external device connected to the pin terminal 82, the center tap 912 of the second coil of each signal transmission channel passes through the first core coil The electrical connection of the 94 to the pin terminal 82 does not affect the Auto MDI/MDIX (port automatic identification function) of the external device, and overcomes the defects of the signal transmission channel of the background art, so the application performance of the authored electrical connector is better. it is good.

In summary, this creation has indeed met the requirements of the invention patent, and filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and those who are familiar with the skill of the present invention are equivalent to the equivalent modifications or changes made by the spirit of the present creation. It should be within the scope of the following patent application.

1‧‧‧Filter circuit

100‧‧‧Transmission cable side

11‧‧‧Signal transmission channel

20‧‧‧Transformers

200‧‧‧Circuit board side

21‧‧‧First coil

210‧‧‧First connection

211, 221‧ ‧ center tap

22‧‧‧second coil

220‧‧‧second connection

30‧‧‧Two-wire common mode choke

40‧‧‧First core coil

41‧‧‧third coil

42‧‧‧fourth coil

Claims (10)

A filter circuit is provided with: a transmission cable side and a circuit board side which are input and output of each other; and four transmission channels connected between the transmission cable side and the circuit board side, each transmission channel includes a transformer connected to the transmission cable side And a two-wire common mode choke connecting the transformer and the circuit board side, the transformer includes a first coil and a second coil, the first coil is provided with two first connection ends connected to the transmission cable side, and the second coil is provided Connecting two second connection ends of the two-wire common mode choke coil and a center tap between the two second connection ends; and at least one first core coil, the center tap of the second coil of each of the transmission channels passes through A core coil is electrically connected to the board side. The filter circuit of claim 1, wherein the filter circuit is provided with two first core coils, and the first core coil includes a magnetic core and a third coil surrounding the magnetic core a fourth coil, wherein a center tap of the second coil of the one signal transmission channel is connected to the circuit board side through a third coil of one of the first core coils, wherein a center tap of the second coil of the other signal transmission channel corresponds to The fourth coil of one of the first core coils is connected to the circuit board side, wherein the center tap of the second coil of the third signal transmission channel is connected to the circuit board corresponding to the third coil of the other first core coil The side, wherein the center tap of the second coil of the fourth signal transmission channel is connected to the circuit board side via the fourth coil of the other first core coil. The filter circuit of claim 1, wherein the filter circuit is provided with a first core coil, the first core coil includes a magnetic core and a third coil and a circumference surrounding the magnetic core a four coil, wherein a center tap of the second coil of the two signal transmission channels is connected to the circuit board side through the third coil, wherein the other two signal transmission channels are in the second coil The heart tap is connected to the board side through the fourth coil. The filter circuit of claim 1, wherein the filter circuit is provided with a first core coil, the first core coil includes a magnetic core and a third coil and a circumference surrounding the magnetic core a four coil, wherein a center tap of the second coil of the three signal transmission channels is connected to the circuit board side through the third coil, and a center tap of the second coil of the remaining one of the signal transmission channels is connected to the fourth coil through the fourth coil Board side. The filter circuit of claim 1, wherein the filter circuit is provided with a first core coil, the first core coil includes a magnetic core and a third coil and a circumference surrounding the magnetic core The four coils, the center taps of the second coils of the four signal transmission channels are connected to the circuit board side through the third coil. A filter circuit is provided with: a transmission cable side and a circuit board side which are input and output of each other; at least one transformer is connected to the transmission cable side and a two-wire common mode choke coil connecting the transformer and the circuit board side a signal transmission channel, the transformer includes a first coil and a second coil, the first coil is provided with two first connection ends connected to the transmission cable side, and the second coil is provided with two second connection ends connecting the two-wire common mode choke coil And a center tap between the two second connection ends; and at least one first core coil, the center tap of the second coil of the transmission channel being electrically connected to the circuit board side through the first core coil. An electrical connector comprising: a mating terminal for interfacing with a pair of connectors; a pin terminal for connecting the electrical connector to an external circuit board; and a signal processing module for connecting the mating terminal And the pin terminal, the signal processing module includes at least one transformer having a transformer electrically connected to the docking terminal and a two-wire common mode choke connecting the transformer and the pin terminal, and the transformer includes the first a coil and a second coil, the first coil is provided with two first connection ends electrically connected to the mating terminal, and the second coil is provided with a connection Connecting two second connecting ends of the two-wire common mode choke and a center tap between the two connecting ends; wherein the signal processing module is further provided with at least one first core coil, and the signal transmission channel The center tap of the second coil is electrically connected to the pin terminal through the first core coil. The electrical connector of claim 7, wherein the signal processing module further comprises a sub-board, the first core coil is a two-wire core coil, and the two-wire common mode The choke coil and the first core coil are electronic modules that are independent of each other and are surface-mounted on the sub-board. An electrical connector comprising: a mating terminal for interfacing with a pair of connectors; a pin terminal for connecting the electrical connector to an external circuit board; and a signal processing module for connecting the mating terminal And the pin terminal, the signal processing module is provided with four signal transmission channels, each of the signal transmission channels includes a transformer electrically connected to the docking terminal and a two-wire common mode turbulence connecting the transformer and the pin terminal. The first transformer has a first coil and a second coil, the first coil is provided with two first connecting ends electrically connected to the mating terminal, and the second coil is provided with two second connecting ends connecting the two-wire common mode chokes and a center tap between the two second connection ends; wherein the signal processing module is further provided with at least one first core coil, and a center tap of the second coil of each of the signal transmission channels passes through the first core coil Connect to the pin terminal. The electrical connector of claim 9, wherein the signal processing module further comprises a sub-board, the first core coil is a two-wire core coil, and the two wires are The mode choke coil and the first core coil are electronic modules that are independent of each other and surface-mounted on the sub-board.