EP1950848A1 - Connection apparatus - Google Patents
Connection apparatus Download PDFInfo
- Publication number
- EP1950848A1 EP1950848A1 EP07001467A EP07001467A EP1950848A1 EP 1950848 A1 EP1950848 A1 EP 1950848A1 EP 07001467 A EP07001467 A EP 07001467A EP 07001467 A EP07001467 A EP 07001467A EP 1950848 A1 EP1950848 A1 EP 1950848A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- high voltage
- voltage impulse
- connection apparatus
- slot
- pins
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/6608—Structural association with built-in electrical component with built-in single component
- H01R13/6633—Structural association with built-in electrical component with built-in single component with inductive component, e.g. transformer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F19/00—Fixed transformers or mutual inductances of the signal type
- H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
- H01F19/08—Transformers having magnetic bias, e.g. for handling pulses
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/6608—Structural association with built-in electrical component with built-in single component
- H01R13/6625—Structural association with built-in electrical component with built-in single component with capacitive component
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
- H01R13/6658—Structural association with built-in electrical component with built-in electronic circuit on printed circuit board
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
- H01R13/6666—Structural association with built-in electrical component with built-in electronic circuit with built-in overvoltage protection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F19/00—Fixed transformers or mutual inductances of the signal type
- H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
- H01F19/08—Transformers having magnetic bias, e.g. for handling pulses
- H01F2019/085—Transformer for galvanic isolation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
- H01R24/60—Contacts spaced along planar side wall transverse to longitudinal axis of engagement
- H01R24/62—Sliding engagements with one side only, e.g. modular jack coupling devices
- H01R24/64—Sliding engagements with one side only, e.g. modular jack coupling devices for high frequency, e.g. RJ 45
Definitions
- the invention relates to a connection apparatus, and more particularly to a connection apparatus with high voltage impulse protection.
- Transient overvoltages may be due to any one of several factors. For example, lightning, electrostatic discharge, or malfunctioning equipment at a remote end of the cable may be responsible.
- Fig. 1 is a schematic diagram of a conventional network connector.
- the network connector 100 provides high voltage impulse protection (also referred to as lightening or surge protection) between signal lines by transient voltage suppressor (TVS) diodes 10A ⁇ 10D and provides high voltage impulse protection between signal lines and a ground terminal by coupling resistors R1 ⁇ R4 and a capacitor CH to the pins TX+, TX-, RX+ and RX-.
- TVS transient voltage suppressor
- the described method has the following disadvantages.
- Energy caused the high voltage impulse may discharge to other components as the resistors have a large volume.
- the volume of the resistors must be sufficiently large.
- isolation glue must be coated on the printed circuit board, reducing yield and increasing time-to-market.
- the currents through the each resistor may also be different due to resistance error in the resistors, such that the resistor with a relative smaller resistance may bear a larger current and thus be damaged.
- Total cost increases with the total number of resistors used.
- the resistors may age due to lightening. Additionally, there is no lightening protection for the secondary coils (TL3 and TL4), and thus, interference with the core of the system by lightening is not preventable.
- Typical integrated circuits are not capable of sustaining high voltage and although the primary coils (TL1 and TL2) isolate most discharged energy, a voltage of several tens of volts is still induced in the secondary coils and the motherboard may be damaged accordingly.
- An exemplary embodiment of a connection apparatus comprises at least one isolation transformer comprising a primary coil and a secondary coil. Each primary coil and secondary coil comprises a first end, a second end and a tap.
- a high voltage impulse protector is disposed between the primary coil of the isolation transformer and a ground terminal for discharging an overcurrent caused by a high voltage to the ground terminal by point discharge when a high voltage impulse event occurs.
- connection apparatus comprises a socket with a slot disposed on a circuit board.
- the slot comprises a plurality of pins and a high voltage impulse protector is disposed between the pins of the slot and a ground terminal for discharging an overcurrent caused by a high voltage to the ground terminal by point discharge when a high voltage impulse event occurs.
- An exemplary embodiment of a high voltage impulse protection method for a connection apparatus comprises a slot disposed on a circuit board, in which the slot has a plurality of pins.
- a high voltage impulse protector is disposed between the pins of the slot and a ground terminal to discharge overcurrent generated by a high voltage impulse to the ground terminal by point discharge when a high voltage impulse event occurs.
- Fig. 1 is a schematic diagram of a conventional network connector
- Fig. 2 shows an embodiment of a connection apparatus
- Fig. 3 is a diagram illustrating high voltage impulse protector and a slot in the connection apparatus
- Fig. 4 is another diagram illustrating the high voltage impulse protector and the slot in the connection apparatus
- Fig. 5 is a diagram illustrating a isolation transformer and a transient voltage suppression unit in the connection apparatus
- Fig. 6 shows another embodiment of a connection apparatus
- Fig. 7 is a diagram showing the connection apparatus shown in Fig. 6 ;
- Figs. 8A and 8B show another embodiment of a connection apparatus.
- the surrounding air may be dissociated to generate gas discharge, known as point discharge, when electric field strength increases acutely.
- the invention utilizes point discharge to discharge energy from high voltage impulse on all pins (connected to the primary coil) to the ground terminal by a capacitor when a high voltage impulse event occurs.
- Fig. 2 shows an embodiment of a connection apparatus.
- a connection apparatus 200 comprises a slot 22, two isolation transformers 24A and 24B, a high voltage impulse protector 26 and two transient voltage suppression units 28A and 28B.
- the connection apparatus 200 can be a network connector but is not limited thereto.
- the slot 22 is coupled between an external network cable (not shown) and the isolation transformers 24A and 24B and comprises a plurality of pins TX+, TX-, RX+ and RX-.
- the slot 22 can be disposed on a circuit board 29 (shown in Fig. 3 ) by dual-in-line package (DIP) technology.
- DIP dual-in-line package
- the isolation transformers 24A and 24B both comprise a primary coil and a secondary coil, in which the primary coil and the secondary coil each has a first end, a second end and a tap.
- the primary coils of the isolation transformers 24A and 24B are coupled to the slot 22 respectively, and the secondary coils of the isolation transformers 24A and 24B are coupled to an external processing circuit (not shown), such as a processing circuit on a local area network (LAN) card or a motherboard, through the connection terminals TD+, TD-, RD+ and RD-.
- LAN local area network
- the first and second ends of the primary coil in the isolation transformer 24A are coupled to the pins TX+ and TX-, and the first and second ends of the primary coil in the isolation transformer 24B are coupled to the pins RX+ and RX-.
- the high voltage impulse protector 26 is disposed between the primary coils of the isolation transformers 24A and 24B and a ground terminal to discharge overcurrent generated by a high voltage impulse the ground terminal by point discharge when a high voltage impulse event occurs.
- the high voltage impulse protector 26 can be a conductive layer CM with a plurality of tips TP aligning with pins of the slot 22 respectively.
- the conductive layer CM does not connect to the pins of the slot 22 directly and provides high voltage impulse protection between signal lines and the ground terminal by point discharge only when a high voltage impulse event occurs.
- the high voltage impulse protector 26 and all pins of the slot 22 are not electrically connected, i.e., they are open-circuit.
- the high voltage impulse protector 26 and the pins of the slot 22 are electrically coupled by point discharge only when a high voltage impulse event occurs.
- the conductive layer CM has a plurality of tips TP separated from pins PN of the slot 22 by a small gap gp, such that the tips TP do not electrically connect directly to the pins PN of the slot 22. Because point discharge is a non-contact design, signals on the pins PN are not affected by aging of the high voltage impulse protector 26 and other elements of the conventional connector can also be prevented.
- Energy induced by high voltage impulse is discharged to the tips TP by the pins PN connected to the primary coil, electric energy is converted to luminous energy for 0.5-10ns, and after partial decay, is discharged to the ground terminal by the capacitor.
- the high voltage impulse protector 26 discharges an overcurrent caused by a high voltage on the pins RX+, RX-, TX- and TX+ to the ground terminal by point discharge when a high voltage impulse event occurs.
- the isolation transformers 24A and 24B and other circuits coupled thereto are protected, against high voltage impulse events.
- the high voltage impulse protector 26 can further comprise a capacitor CH coupled between the conductive layer CM and the ground terminal, buffering energy generated by the high voltage impulse event and extending discharge time such that the generated energy can be decayed and discharged to the ground terminal.
- the conductive layer CM can be a metal layer, such as a copper (Cu) layer but it is not limited thereto.
- the conductive layer CM shown in Fig. 4 is disposed in the circuit board 29 such that the routing on the circuit board 29 can be simplified, but it is also can be disposed on the top surface TS or bottom surface BS of the circuit board 29.
- the pins of the slot 22 can be connected to the circuit board 29 by plugs when the slot 22 is disposed on the circuit board 29 by surface mount device (SMD) technology.
- SMD surface mount device
- the tips of the high voltage impulse protector 26 can be aligned with the plugs respectively but are not electrically connected directly, thus, high voltage impulse protection is provided between signal lines and the ground terminal by point discharge only when a high voltage impulse event occurs.
- transient voltage suppression units 28A is disposed between the taps of the primary coils in the isolation transformer 24A and 24B and the transient voltage suppression units 28B is disposed between the taps of the secondary coils in the isolation transformer 24A and 24B, performing a high voltage impulse protection between signal lines.
- transient voltage suppression units 28A and 28B can serve as a voltage-current limiting element for clamping the voltage and the current, or both, induced at the primary coil, or the secondary coils of the isolation transformer 24A and 24B.
- the transient voltage suppression units 28A and 28B can comprise series-connected or parallel-connected transient voltage suppressor (TVS) diodes, polydiodes, surge absorbers, varistors, zener diodes or combinations thereof but are not limited thereto.
- TVS transient voltage suppressor
- Fig. 5 shows a diagram illustrating the isolation transformers and the transient voltage suppression units.
- the primary coil of the isolation transformer 24A comprises a winding TL1 coupled to the pin TX+, a winding TL2 coupled to the pin TX-, and a tap TPT1 coupled to the transient voltage suppression unit 28A.
- the primary coil of the isolation transformer 24B comprises a winding RL1 coupled to the pin RX+, a winding RL2 coupled to the pin RX-, and a tap RPT1 coupled to the transient voltage suppression unit 28A.
- the secondary coil of the isolation transformer 24A comprises a winding TL3 coupled to the pin TD+, a winding TL4 coupled to the pin TD-, and a tap TPT2 coupled to the transient voltage suppression unit 28B.
- the secondary coil of the isolation transformer 24B comprises a winding RL3 coupled to the pin RD+, a winding RL4 coupled to the pin RD-, and a tap RPT2 coupled to the transient voltage suppression unit 28B.
- the transient voltage suppression unit 28A and 28B can be transient voltage suppressor (TVS) diodes but it is not limited thereto.
- the taps are typically at zero-voltage under normal operation, such that signals on the pins TX+, RX+, RX-, TX-, TD+, RD+, RD- and TD- are not affected by the stray capacitors of the transient voltage suppression units 28A and 28B coupled to the taps.
- the induced currents at the secondary coil can be clamped by the transient voltage suppression unit 28B coupled to the taps TPT2 and TPR2, such that the branch currents on the windings TL3, TL4, RL3 and RL4 can be limited, forming a second-stage high voltage impulse protection.
- the transient voltage suppression units 28A and 28B still can limit branch current on each winding or clamp the voltage difference between two taps even if currents or voltages on the pins may be different, such that the circuit board can be protected from the high voltage impulse event.
- connection apparatus of the invention has the following advantages.
- the discharge path does not couple to signals on the pins, thus, isolation glue is not required, and routing of the circuit board can be simplified. Particularly, because there is no capacitor and resistor coupled to the signals on the pins directly, i.e., the discharge path does not couple signals on the pins, signal decay does not occur.
- the connection apparatus can be applied to all high speed network standards without affecting their transmission.
- each transient voltage impulse suppression unit is disposed between two taps, each transient voltage impulse suppression unit can protect four signal lines and transient voltage impulse suppression units disposed at the secondary coil further provide second-stage protection for a mother board against high voltage impulse events.
- Fig. 6 shows another embodiment of a connection apparatus.
- a connection apparatus 300 comprises a plug 32 and a socket 34.
- Fig. 7 is another diagram of the connection apparatus shown in Fig. 6 .
- the connection apparatus 300 can be a network connector but is not limited thereto.
- the plug 32 is coupled to the socket 34 through a cable 36, and the socket 34 comprises the high voltage impulse protector 26 and the slot 22 shown in Fig. 2 .
- the high voltage impulse protector 26 is disposed between the primary coils of the isolation transformers 24A and 24B and a ground terminal to discharge overcurrent generated by a high voltage to the ground terminal by point discharge when a high voltage impulse event occurs.
- the high voltage impulse protector 26 can be a conductive layer CM with a plurality of tips TP aligning with pins of the slot 22 respectively. Operations of the high voltage impulse protector 26 are similar to those described with reference to Figs. 2 ⁇ 4 , thus, further description thereof is omitted for brevity.
- a connection apparatus 400 comprises a slot 22 and a plug 32, a circuit board (not shown) in a housing 42, in which the circuit board comprises the high voltage impulse protector 26 shown in Fig. 2 .
- the slot 22, the plug 32 and the high voltage impulse protection 26 are electrically coupled by the circuit board, and the high voltage impulse protection 26 is disposed between the pins of the slot 22 and the ground terminal, discharging overcurrent generated by high voltage to the ground terminal by point discharge when a high voltage impulse event occurs.
- the high voltage impulse protector 26 comprises a conductive layer CM with a plurality of tips TP aligning with pins of the slot 22 and a capacitor CH coupled between the conductive layer CM and the ground terminal. Operations of the high voltage impulse protector 26 are similar to those described with reference to Figs. 2 ⁇ 4 , thus, further description thereof is omitted for brevity.
Abstract
Description
- The invention relates to a connection apparatus, and more particularly to a connection apparatus with high voltage impulse protection.
- Whenever electronic circuitry is coupled to an external cable run there is a risk of damage to the circuit, due to the transmission of transient overvoltages by the cable run. Transient overvoltages may be due to any one of several factors. For example, lightning, electrostatic discharge, or malfunctioning equipment at a remote end of the cable may be responsible. Several techniques exist for isolating circuitry from potentially damaging surges.
-
Fig. 1 is a schematic diagram of a conventional network connector. As shown, thenetwork connector 100 provides high voltage impulse protection (also referred to as lightening or surge protection) between signal lines by transient voltage suppressor (TVS)diodes 10A~10D and provides high voltage impulse protection between signal lines and a ground terminal by coupling resistors R1~R4 and a capacitor CH to the pins TX+, TX-, RX+ and RX-. - The described method, however, has the following disadvantages. Energy caused the high voltage impulse may discharge to other components as the resistors have a large volume. To sustain the discharged energy, however, the volume of the resistors must be sufficiently large. Further, in order provided optimum isolation for a component, isolation glue must be coated on the printed circuit board, reducing yield and increasing time-to-market.
- The currents through the each resistor may also be different due to resistance error in the resistors, such that the resistor with a relative smaller resistance may bear a larger current and thus be damaged. Total cost increases with the total number of resistors used. The resistors may age due to lightening. Additionally, there is no lightening protection for the secondary coils (TL3 and TL4), and thus, interference with the core of the system by lightening is not preventable. Typical integrated circuits are not capable of sustaining high voltage and although the primary coils (TL1 and TL2) isolate most discharged energy, a voltage of several tens of volts is still induced in the secondary coils and the motherboard may be damaged accordingly.
- A detailed description is given in the following embodiments with reference to the accompanying drawings.
- Connection apparatuses are provided. An exemplary embodiment of a connection apparatus comprises at least one isolation transformer comprising a primary coil and a secondary coil. Each primary coil and secondary coil comprises a first end, a second end and a tap. A high voltage impulse protector is disposed between the primary coil of the isolation transformer and a ground terminal for discharging an overcurrent caused by a high voltage to the ground terminal by point discharge when a high voltage impulse event occurs.
- Another embodiment of connection apparatus comprises a socket with a slot disposed on a circuit board. The slot comprises a plurality of pins and a high voltage impulse protector is disposed between the pins of the slot and a ground terminal for discharging an overcurrent caused by a high voltage to the ground terminal by point discharge when a high voltage impulse event occurs.
- High voltage impulse protection methods for a connection apparatus are provided. An exemplary embodiment of a high voltage impulse protection method for a connection apparatus comprises a slot disposed on a circuit board, in which the slot has a plurality of pins. In the method, a high voltage impulse protector is disposed between the pins of the slot and a ground terminal to discharge overcurrent generated by a high voltage impulse to the ground terminal by point discharge when a high voltage impulse event occurs.
- The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
-
Fig. 1 is a schematic diagram of a conventional network connector; -
Fig. 2 shows an embodiment of a connection apparatus; -
Fig. 3 is a diagram illustrating high voltage impulse protector and a slot in the connection apparatus; -
Fig. 4 is another diagram illustrating the high voltage impulse protector and the slot in the connection apparatus; -
Fig. 5 is a diagram illustrating a isolation transformer and a transient voltage suppression unit in the connection apparatus; -
Fig. 6 shows another embodiment of a connection apparatus; -
Fig. 7 is a diagram showing the connection apparatus shown inFig. 6 ; and -
Figs. 8A and8B show another embodiment of a connection apparatus. - The following description is of the best-contemplated mode of carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention is best determined by reference to the appended claims.
- In a space with high surface curvature (such as a tip), the surrounding air may be dissociated to generate gas discharge, known as point discharge, when electric field strength increases acutely. The invention utilizes point discharge to discharge energy from high voltage impulse on all pins (connected to the primary coil) to the ground terminal by a capacitor when a high voltage impulse event occurs.
-
Fig. 2 shows an embodiment of a connection apparatus. As shown, aconnection apparatus 200 comprises aslot 22, twoisolation transformers voltage impulse protector 26 and two transientvoltage suppression units connection apparatus 200 can be a network connector but is not limited thereto. - The
slot 22 is coupled between an external network cable (not shown) and theisolation transformers slot 22 can be disposed on a circuit board 29 (shown inFig. 3 ) by dual-in-line package (DIP) technology. - The
isolation transformers isolation transformers slot 22 respectively, and the secondary coils of theisolation transformers isolation transformer 24A are coupled to the pins TX+ and TX-, and the first and second ends of the primary coil in theisolation transformer 24B are coupled to the pins RX+ and RX-. - The high
voltage impulse protector 26 is disposed between the primary coils of theisolation transformers Fig. 3 , the highvoltage impulse protector 26 can be a conductive layer CM with a plurality of tips TP aligning with pins of theslot 22 respectively. The conductive layer CM does not connect to the pins of theslot 22 directly and provides high voltage impulse protection between signal lines and the ground terminal by point discharge only when a high voltage impulse event occurs. - Namely, when no high voltage impulse event occurs, the high
voltage impulse protector 26 and all pins of theslot 22 are not electrically connected, i.e., they are open-circuit. The highvoltage impulse protector 26 and the pins of theslot 22 are electrically coupled by point discharge only when a high voltage impulse event occurs. As shown inFig. 4 , the conductive layer CM has a plurality of tips TP separated from pins PN of theslot 22 by a small gap gp, such that the tips TP do not electrically connect directly to the pins PN of theslot 22. Because point discharge is a non-contact design, signals on the pins PN are not affected by aging of the highvoltage impulse protector 26 and other elements of the conventional connector can also be prevented. Energy induced by high voltage impulse is discharged to the tips TP by the pins PN connected to the primary coil, electric energy is converted to luminous energy for 0.5-10ns, and after partial decay, is discharged to the ground terminal by the capacitor. - Because the first end and the second end of the primary coils in the
isolation transformers voltage impulse protector 26 discharges an overcurrent caused by a high voltage on the pins RX+, RX-, TX- and TX+ to the ground terminal by point discharge when a high voltage impulse event occurs. Thus, theisolation transformers - Further, the high
voltage impulse protector 26 can further comprise a capacitor CH coupled between the conductive layer CM and the ground terminal, buffering energy generated by the high voltage impulse event and extending discharge time such that the generated energy can be decayed and discharged to the ground terminal. For example, the conductive layer CM can be a metal layer, such as a copper (Cu) layer but it is not limited thereto. - It should be noted that the conductive layer CM shown in
Fig. 4 is disposed in thecircuit board 29 such that the routing on thecircuit board 29 can be simplified, but it is also can be disposed on the top surface TS or bottom surface BS of thecircuit board 29. - In some embodiments, the pins of the
slot 22 can be connected to thecircuit board 29 by plugs when theslot 22 is disposed on thecircuit board 29 by surface mount device (SMD) technology. The tips of the highvoltage impulse protector 26 can be aligned with the plugs respectively but are not electrically connected directly, thus, high voltage impulse protection is provided between signal lines and the ground terminal by point discharge only when a high voltage impulse event occurs. - As shown in
Fig. 2 , the transientvoltage suppression units 28A is disposed between the taps of the primary coils in theisolation transformer voltage suppression units 28B is disposed between the taps of the secondary coils in theisolation transformer voltage suppression units isolation transformer - For example, the transient
voltage suppression units voltage suppression units -
Fig. 5 shows a diagram illustrating the isolation transformers and the transient voltage suppression units. As shown, the primary coil of theisolation transformer 24A comprises a winding TL1 coupled to the pin TX+, a winding TL2 coupled to the pin TX-, and a tap TPT1 coupled to the transientvoltage suppression unit 28A. The primary coil of theisolation transformer 24B comprises a winding RL1 coupled to the pin RX+, a winding RL2 coupled to the pin RX-, and a tap RPT1 coupled to the transientvoltage suppression unit 28A. The secondary coil of theisolation transformer 24A comprises a winding TL3 coupled to the pin TD+, a winding TL4 coupled to the pin TD-, and a tap TPT2 coupled to the transientvoltage suppression unit 28B. The secondary coil of theisolation transformer 24B comprises a winding RL3 coupled to the pin RD+, a winding RL4 coupled to the pin RD-, and a tap RPT2 coupled to the transientvoltage suppression unit 28B. In this embodiment, the transientvoltage suppression unit - The taps are typically at zero-voltage under normal operation, such that signals on the pins TX+, RX+, RX-, TX-, TD+, RD+, RD- and TD- are not affected by the stray capacitors of the transient
voltage suppression units - When a voltage difference is induced between two signal lines by a high voltage impulse event, currents I1 and I2 flow to transient
voltage suppression unit 28A from the tap TPT1 between the windings TL1 and TL2 and currents I3 and I4 flow to transientvoltage suppression unit 28B from the tap TPT2 between the windings RL1 and RTL2. Namely, I = (I1+I2) = - (I3+I4), and thus, if clamp current of the transientvoltage suppression unit 28A is controlled, the branch currents on the windings TL1, TL2, RL1 and RL2 can be controlled effectively and induced currents at the secondary coil can also be suppressed. Similarly, the induced currents at the secondary coil can be clamped by the transientvoltage suppression unit 28B coupled to the taps TPT2 and TPR2, such that the branch currents on the windings TL3, TL4, RL3 and RL4 can be limited, forming a second-stage high voltage impulse protection. - Further, when a high voltage impulse event occurs between signal lines and the ground terminal, the transient
voltage suppression units - The connection apparatus of the invention has the following advantages. The discharge path does not couple to signals on the pins, thus, isolation glue is not required, and routing of the circuit board can be simplified. Particularly, because there is no capacitor and resistor coupled to the signals on the pins directly, i.e., the discharge path does not couple signals on the pins, signal decay does not occur. Thus, the connection apparatus can be applied to all high speed network standards without affecting their transmission.
- Further, because the resistive elements of conventional connection apparatuses are omitted, discharge noise generated by resistive elements can be prevented, protection units or resistors are not damaged by the voltage difference due to errors between resistors, and aging of the resistive elements due to high voltage impulses can also be prevented. Moreover, occupied space on the printed circuit board and time-to-market can be reduced. In addition, because each transient voltage impulse suppression unit is disposed between two taps, each transient voltage impulse suppression unit can protect four signal lines and transient voltage impulse suppression units disposed at the secondary coil further provide second-stage protection for a mother board against high voltage impulse events.
-
Fig. 6 shows another embodiment of a connection apparatus. As shown, aconnection apparatus 300 comprises aplug 32 and asocket 34.Fig. 7 is another diagram of the connection apparatus shown inFig. 6 . In this embodiment, theconnection apparatus 300 can be a network connector but is not limited thereto. - The
plug 32 is coupled to thesocket 34 through acable 36, and thesocket 34 comprises the highvoltage impulse protector 26 and theslot 22 shown inFig. 2 . The highvoltage impulse protector 26 is disposed between the primary coils of theisolation transformers voltage impulse protector 26 can be a conductive layer CM with a plurality of tips TP aligning with pins of theslot 22 respectively. Operations of the highvoltage impulse protector 26 are similar to those described with reference toFigs. 2~4 , thus, further description thereof is omitted for brevity. -
Figs. 8A and8B show another embodiment of a connection apparatus. As shown, aconnection apparatus 400 comprises aslot 22 and aplug 32, a circuit board (not shown) in ahousing 42, in which the circuit board comprises the highvoltage impulse protector 26 shown inFig. 2 . Theslot 22, theplug 32 and the highvoltage impulse protection 26 are electrically coupled by the circuit board, and the highvoltage impulse protection 26 is disposed between the pins of theslot 22 and the ground terminal, discharging overcurrent generated by high voltage to the ground terminal by point discharge when a high voltage impulse event occurs. For example, the highvoltage impulse protector 26 comprises a conductive layer CM with a plurality of tips TP aligning with pins of theslot 22 and a capacitor CH coupled between the conductive layer CM and the ground terminal. Operations of the highvoltage impulse protector 26 are similar to those described with reference toFigs. 2~4 , thus, further description thereof is omitted for brevity. - While the invention has been described by way of example and in terms of preferred embodiment, it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
Claims (22)
- A connection apparatus, comprising:at least one isolation transformer comprising a primary coil and a secondary coil each comprising a first end, a second end and a tap; anda high voltage impulse protector disposed between the primary coil of the isolation transformer and a ground terminal, discharging an overcurrent caused by a high voltage impulse to the ground terminal by point discharge when a high voltage impulse event occurs.
- The connection apparatus as claimed in claim 1, further at lease one transient voltage suppression unit performing a high voltage impulse protection between signal lines.
- The connection apparatus as claimed in claim 1, wherein the connection apparatus comprises two isolation transformers and two transient voltage suppression units in which one of the transient voltage suppression units is coupled between taps of the primary coils in the two isolation transformers and the other is coupled between taps of the secondary coils in the two isolation transformers.
- The connection apparatus as claimed in claim 2, wherein the transient voltage suppression unit comprises transient voltage suppressor (TVS) diodes, polydiodes, surge absorbers or varistors.
- The connection apparatus as claimed in claim 1, further comprising a slot disposed on a circuit board, wherein the slot comprises a plurality of pins coupling to the first end or the second end of the primary coil and the high voltage impulse protector comprises a plurality of tips aligning with the pins of the slot without directly connecting.
- The connection apparatus as claimed in claim 5, wherein the high voltage impulse protector does not electrically couple to the pins of the slot when no high voltage impulse event and discharges overcurrent caused by the high voltage impulse to the ground terminal by point discharge when occurring the high voltage impulse event.
- The connection apparatus as claimed in claim 5, wherein the high voltage impulse protector comprises:a conductive layer comprising the plurality of tips aligning the pins of the slot: anda comparator coupled between the conductive layer and the ground terminal.
- The connection apparatus as claimed in claim 7, wherein the conductive layer is disposed in or on the circuit board.
- The connection apparatus as claimed in claim 1, wherein the connection apparatus is disposed on a local area network (LAN) card or on a motherboard.
- The connection apparatus as claimed in claim 1, wherein the connection apparatus is a network connector.
- A connection apparatus, comprising:a socket comprising a slot disposed on a circuit board and the slot having a plurality of pins; anda high voltage impulse protector disposed between the pins of the slot and a ground terminal, discharging an overcurrent generated by a high voltage impulse to the ground terminal by point discharge when a high voltage impulse event occurs.
- The connection apparatus as claimed in claim 11, wherein the high voltage impulse protector does not electrically couple to the pins of the slot when no high voltage impulse event.
- The connection apparatus as claimed in claim 11, wherein the connection apparatus is a network connector.
- The connection apparatus as claimed in claim 11, wherein the high voltage impulse protector comprises:a conductive layer comprising the plurality of tips aligning the pins of the slot; anda comparator coupled between the conductive layer and the ground terminal.
- The connection apparatus as claimed in claim 11, further comprising a plug electrically coupled to the socket.
- A high voltage impulse protection method for a connection apparatus comprising a slot disposed on a circuit board, in which the slot has a plurality of pins, and the method comprising:disposing a high voltage impulse protector between the pins of the slot and a ground terminal to discharge an overcurrent caused by a high voltage impulse to the ground terminal by point discharge when a high voltage impulse event occurs.
- The method as claimed in claim 16, wherein the connection apparatus further comprises at least one isolation transformer comprising a primary coil and a secondary coil each comprising a first end, a second end and a tap, and the first and second ends of the isolation transformer are electrically coupled to a corresponding pin of the slot respectively.
- The method as claimed in claim 17, further comprising disposing a first transient voltage suppression unit between taps of the primary coils of two isolation transformers, and a second suppression unit between taps of the secondary coils of the two isolation transformers, performing a high voltage impulse protection between signal lines.
- The method as claimed in claim 17, wherein the high voltage impulse protector comprises a plurality of tips aligning with the pins of the slot without connecting directly, discharging the overcurrent generated by the high voltage impulse to the ground terminal by point discharge when the high voltage impulse event occurs.
- The method as claimed in claim 19, wherein the high voltage impulse protector comprises a conductive layer having the tips aligning with the pins of the slot.
- The method as claimed in claim 20, wherein the conductive layer is disposed in or on the circuit board.
- The method as claimed in claim 20, further comprising disposing a capacitor between the conductive layer and the ground terminal.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE602007000726T DE602007000726D1 (en) | 2007-01-24 | 2007-01-24 | connection device |
ES07001467T ES2324497T3 (en) | 2007-01-24 | 2007-01-24 | CONNECTION APPARATUS |
EP07001467A EP1950848B1 (en) | 2007-01-24 | 2007-01-24 | Connection apparatus |
AT07001467T ATE426262T1 (en) | 2007-01-24 | 2007-01-24 | CONNECTION DEVICE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07001467A EP1950848B1 (en) | 2007-01-24 | 2007-01-24 | Connection apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1950848A1 true EP1950848A1 (en) | 2008-07-30 |
EP1950848B1 EP1950848B1 (en) | 2009-03-18 |
Family
ID=37983471
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07001467A Not-in-force EP1950848B1 (en) | 2007-01-24 | 2007-01-24 | Connection apparatus |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1950848B1 (en) |
AT (1) | ATE426262T1 (en) |
DE (1) | DE602007000726D1 (en) |
ES (1) | ES2324497T3 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2194616A2 (en) * | 2008-12-02 | 2010-06-09 | Moxa Inc. | RJ45 connector device having key structure for changing pin definitions |
EP2490307A3 (en) * | 2011-02-18 | 2014-03-19 | ASUS Technology Pte Ltd. | Surge protection device inside a connector |
US20220102046A1 (en) * | 2020-09-27 | 2022-03-31 | Optomedia Technology Inc. | Signal converter |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020001160A1 (en) * | 2000-04-20 | 2002-01-03 | Reinhold Berberich | Overvoltage protection device |
US6541878B1 (en) * | 2000-07-19 | 2003-04-01 | Cisco Technology, Inc. | Integrated RJ-45 magnetics with phantom power provision |
US20040027779A1 (en) * | 2002-08-09 | 2004-02-12 | Byrne Daniel J. | Electrostatic discharge protection |
US20050164558A1 (en) * | 2002-04-10 | 2005-07-28 | Ferentz Alon Z. | Active local area network connector |
-
2007
- 2007-01-24 AT AT07001467T patent/ATE426262T1/en not_active IP Right Cessation
- 2007-01-24 DE DE602007000726T patent/DE602007000726D1/en active Active
- 2007-01-24 EP EP07001467A patent/EP1950848B1/en not_active Not-in-force
- 2007-01-24 ES ES07001467T patent/ES2324497T3/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020001160A1 (en) * | 2000-04-20 | 2002-01-03 | Reinhold Berberich | Overvoltage protection device |
US6541878B1 (en) * | 2000-07-19 | 2003-04-01 | Cisco Technology, Inc. | Integrated RJ-45 magnetics with phantom power provision |
US20050164558A1 (en) * | 2002-04-10 | 2005-07-28 | Ferentz Alon Z. | Active local area network connector |
US20040027779A1 (en) * | 2002-08-09 | 2004-02-12 | Byrne Daniel J. | Electrostatic discharge protection |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2194616A2 (en) * | 2008-12-02 | 2010-06-09 | Moxa Inc. | RJ45 connector device having key structure for changing pin definitions |
EP2194616A3 (en) * | 2008-12-02 | 2011-05-18 | Moxa Inc. | RJ45 connector device having key structure for changing pin definitions |
EP2490307A3 (en) * | 2011-02-18 | 2014-03-19 | ASUS Technology Pte Ltd. | Surge protection device inside a connector |
US20220102046A1 (en) * | 2020-09-27 | 2022-03-31 | Optomedia Technology Inc. | Signal converter |
US11600420B2 (en) * | 2020-09-27 | 2023-03-07 | Optomedia Technology Inc. | Signal converter |
Also Published As
Publication number | Publication date |
---|---|
EP1950848B1 (en) | 2009-03-18 |
ES2324497T3 (en) | 2009-08-07 |
DE602007000726D1 (en) | 2009-04-30 |
ATE426262T1 (en) | 2009-04-15 |
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