WO2012111270A1 - 高速インタフェース用コネクタ - Google Patents
高速インタフェース用コネクタ Download PDFInfo
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- WO2012111270A1 WO2012111270A1 PCT/JP2012/000727 JP2012000727W WO2012111270A1 WO 2012111270 A1 WO2012111270 A1 WO 2012111270A1 JP 2012000727 W JP2012000727 W JP 2012000727W WO 2012111270 A1 WO2012111270 A1 WO 2012111270A1
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- contact terminal
- memory card
- pin
- adjacent
- contact
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- 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
- H01R13/646—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00 specially adapted for high-frequency, e.g. structures providing an impedance match or phase match
- H01R13/6461—Means for preventing cross-talk
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/70—Coupling devices
- H01R12/71—Coupling devices for rigid printing circuits or like structures
- H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
Definitions
- the present invention relates to a high-speed interface connector for connecting a differential transmission system signal pin array. More specifically, the present invention relates to a memory card socket for connecting and removing a memory card having a differential transmission system signal pin arrangement, a USB cable connector for connecting a USB cable, and the like.
- memory cards are widely used as storage media for photos and videos taken with digital still cameras and digital video cameras, and as storage media for various contents including photos and videos on mobile phones. . Further, it is also used as a bridge medium when moving or copying various contents stored in the electronic device (hereinafter referred to as a host device) to a personal computer.
- a host device the electronic device
- the memory card has a plurality of signal pins, power supply pins, and ground pins on its surface.
- the inside of the memory card is composed of a printed circuit board, a controller LSI mounted on the printed circuit board, a flash memory, and the like.
- the plurality of pins on the surface of the memory card are electrically connected to each terminal (signal terminal, power supply terminal, ground terminal) of the controller LSI via wiring formed on the printed circuit board.
- the host device has a memory card socket, and when the memory card is inserted into the memory card socket, the host device and the memory card are electrically connected to read and write data.
- the memory card socket is composed of a body part for holding the memory card, a cover shell, contact terminals, and the like.
- the contact terminal is fixed to the body portion so that the memory card comes into contact with a plurality of pins provided on the surface of the memory card when the memory card is inserted into the memory card socket.
- description of the component which is not related to this invention is abbreviate
- An example of the memory card socket is disclosed in Patent Documents 1 and 2, for example.
- Enhance the picture quality of photos and videos recorded with higher functionality of host devices, and the memory capacity of memory cards is also increasing.
- the amount of data handled increases, the data transmission time between the host device and the memory card increases, and convenience decreases. Therefore, the memory card is also transferred between the host device and the memory card in accordance with the expansion of the storage capacity. The speed of data transmission is also being improved.
- Conventional memory cards have adopted a single-ended transmission method as a signal transmission method with a host device, and the memory capacity of the memory card has been expanded by improving the transmission rate.
- the single-ended transmission method is a transmission method that sends a 1-bit signal per signal line and is easily affected by external noise. Therefore, it was necessary to use a relatively large signal amplitude such as 3.3V or 1.8V. For this reason, in order to increase the transmission rate, that is, to improve the signal frequency, it is necessary to shorten the rise time of the signal. Even in the single-ended transmission method, the signal frequency has been improved and the signal rise time has been shortened. However, since the signal amplitude is large, the signal rise time has been shortened.
- the differential transmission method is a method of transmitting a signal using a pair of signal lines, that is, two signal lines, and one of the two signal lines forming a pair has a signal having the same phase as the signal to be transmitted ( This is a system in which a normal-phase signal) is transmitted, and at the same time, a signal having a phase opposite to that of the signal to be transmitted (an anti-phase signal) is transmitted to the other, and a difference between them is detected on the receiving side.
- the differential transmission method since the difference between the positive phase signal and the negative phase signal is detected on the receiving side, the amplitudes of the positive phase signal and the negative phase signal can be reduced. For this reason, since the rise time can be easily shortened, signal transmission can be performed at a higher speed than the single-ended transmission method.
- the positive-phase signal and the negative-phase signal are arranged close to each other. Therefore, even if the positive-phase signal and the negative-phase signal are affected by external noise, the normal-phase signal is generally used. The external noise is uniformly superimposed on the reverse phase signal. For this reason, by taking the difference between the positive phase signal and the negative phase signal on the receiving side, the external noise uniformly superimposed on both is canceled out. Therefore, the differential transmission method is also affected by the external noise. It has the feature of being difficult.
- both sides of the differential signal pair for differential transmission cannot be ground terminals.
- the ground pin P7 (G) and the differential pin P8 as shown by Dif1 in FIG. (S +), P9 (S ⁇ ), and power supply pin P10 (V2) may be arranged in a pin arrangement.
- the crosstalk superimposed from P7 (G) to P8 (S +) is stable potential pins having different potentials.
- the differential signal quality is deteriorated by noise and crosstalk noise superimposed from P10 (V2) to P9 (S ⁇ ).
- the above differential transmission method is not limited to memory cards and is used for various standards.
- a standard of a connection cable for connecting devices for example, a differential transmission method is also used for a USB cable or the like. Therefore, the above problem also occurs between the connection between the board and the equipment and between the connection cable and the connector.
- an object of the present invention is to provide a pin arrangement in which differential transmission pins P (S +) and P (S ⁇ ) are provided, and the left and right pins adjacent to the differential pair pins are stable potential pins having different potentials. It is a high-speed interface connector for connecting a differential transmission system signal pin array having a high-speed interface connector capable of suppressing deterioration of differential signal quality.
- the object of the present invention is to provide differential transmission pins P (S +) and P (S ⁇ ) for high-speed signal transmission as shown in Dif1 of FIG.
- a high-speed interface connector that suppresses the degradation of differential signal quality for memory cards, USB cables, etc. that have a pin arrangement in which the left and right pins adjacent to the differential pair pins are stable potential pins having different potentials. is there.
- a high-speed interface connector includes a pair of differential transmission type signal pins adjacent to each other and two pairs sandwiching both sides of the pair of differential transmission type signal pins.
- Differential transmission system signal pin array including a plurality of stable potential pins, wherein the two stable potential pins have different potentials, and are connected to a cable or memory card having a differential transmission system signal pin array.
- An interface connector A differential transmission type first and second contact terminals connected to the pair of differential transmission type signal pins, respectively, and adjacent to each other; Third and fourth contact terminals sandwiching both sides of the first and second contact terminals, and the third contact terminal adjacent to the first contact terminal is connected to the two stable potential pins.
- the fourth contact terminal connected to one of the two and adjacent to the second contact terminal has the same potential as the third contact terminal; and third and fourth contact terminals; including.
- a fifth contact terminal connected to the other of the two stable potential pins may be further included.
- the first and second pins adjacent to each other are differential transmission type signal pins, and the third and second pins adjacent to each other with both sides of the first and second pin pairs interposed therebetween.
- the third pin is adjacent to the first pin, and is located on the opposite side of the first pin from the second pin
- the fourth pin is Adjacent to the second pin, located opposite to the first pin with respect to the second pin
- the third and fourth pins have a card pin arrangement that does not have the same potential as each other
- the first and second differential transmission system signal pins of the memory card are connected to the first and second differential transmission system signal pins, respectively, and the differential transmission system first and second contact terminals adjacent to each other, Third and fourth contact terminals adjacent to each other across both sides of the first and second contact terminal pairs, wherein the third contact terminal is adjacent to the first contact terminal, The fourth contact terminal is adjacent to the
- the third and fourth contact terminals located on the opposite side of the contact terminals; With The fourth contact terminal is connected to the fourth pin of the memory card, and the third contact terminal is not the third pin of the memory card but has the same stable potential as the fourth pin. It is connected to the connected fifth pin.
- a memory card socket for a memory card in which the pins on both sides of the differential pin pair are not stable potential pins having the same potential is a contact terminal of the memory card socket connected to the memory card differential pin pair.
- a pair of contact terminals adjacent to both sides of the pair can be set to the same stable potential.
- the high-speed interface connector of the present invention in differential signal communication transmitted and received between a differential transmission method signal pin in which the pins adjacent to both sides of the differential pin pair are not the stable potential pin having the same potential and the host device.
- crosstalk from two stable potential pins adjacent to both sides of a contact terminal pair transmitting a differential signal can be correlated. Accordingly, crosstalk having a correlation with each other is canceled at the receiving end of the differential signal, so that an effect of suppressing the quality deterioration of the differential signal is obtained.
- FIG. 3 is an example of a memory card socket according to Embodiment 1 of the present invention corresponding to the memory card of FIG.
- FIG. 3 is an example of a memory card socket of the present invention corresponding to the memory card of FIG.
- FIGS. 4A to 4C are examples of the configuration of the contact terminal 224 in FIG. FIG.
- FIG. 4 is another example of the memory card socket of the present invention corresponding to the memory card of FIG. 2, wherein (a) is a top view of the memory card socket, and the dotted line and broken line portions are portions hidden under the cover shell. It is a perspective view, (b) is a back view of a memory card socket, and (c) is a back view when a memory card is inserted. It is a schematic perspective view which shows the structure of the conventional USB connector. It is the front view seen from the cable connection surface (A) of the USB connector of FIG. It is the rear view seen from the back surface (B) of the USB connector of FIG.
- (A) is a front view of the connection surface of a USB cable
- (b) is a plan view of the USB cable
- (c) is a cross-sectional view showing a cross-sectional structure of the USB cable.
- (A) is a perspective view which shows the structure of the back side of the conventional USB connector
- (b) is a perspective view which shows the structure of the back side of the USB connector which concerns on Embodiment 2.
- the existing signal pin P (S) of the memory card is used for both single-ended transmission and differential transmission (hereinafter referred to as “pin service configuration”). ").
- a memory card using this “pin combination configuration” is a memory card of Reference Example 1.
- the controller LSI 2 in the memory card includes a single-end transmission I / O circuit 5 and a differential transmission I / O circuit 6 (the controller LSI 12 on the host device side has a similar configuration). ).
- the single-end I / O circuit 5 and the differential transmission I / O circuit 6 include a wiring 4 on a printed circuit board in the memory card 1a, a contact terminal (not shown) of the memory card socket 11a, and a host device.
- the wiring 14 on the printed circuit board is used.
- the differential transmission method can perform signal transmission in the GHz order much faster than single-ended transmission. To achieve this, matching the characteristic impedance of the entire transmission line is required. This is more important than single-ended transmission.
- the load capacitance component of the single-ended transmission I / O circuit 5 disturbs the impedance matching of the transmission line, and high-speed signal transmission by the differential transmission method is performed. It will interfere. For this reason, the “pin combined configuration” is not necessarily an optimal configuration for realizing high-speed signal transmission in the GHz order using the differential transmission method.
- a new dedicated pin is added exclusively for differential transmission.
- a memory card using this “differential pin addition configuration” is a memory card of Reference Example 2.
- an additional pin arrangement as shown in the memory card 1b in FIG. 2 can be considered as a configuration example.
- the differential pins P (S +) and P (S ⁇ ) are reduced in pin size, and the load capacitance component generated in the pin portion is reduced.
- the impedance matching is important in high-speed differential transmission by suppressing both sides and enclosing both sides with a pin P (GND) or P (VDD2) having a stable potential.
- a pin arrangement in which both ends of the differential pins P (S +) and P (S ⁇ ) are surrounded by stable potential pins is preferable from the viewpoint of impedance matching.
- both ends of the differential pins P (S +) and P (S ⁇ ) are stable potential pins having different potentials (Dif1), crosstalk noise superimposed from P7 (G) to P8 (S +) and P10 ( There is a possibility that the differential signal quality is deteriorated by crosstalk noise superimposed from V2) to P9 (S ⁇ ).
- FIGS. 3A to 3E the configurations shown in FIGS. 3A to 3E are considered as an example.
- FIGS. 3A and 3B when the contact terminals arranged in contact with the pins of the memory card 1b are simply drawn out in the same manner as the pin arrangement of the memory card socket 11b, it is more than the pin size of the memory card 1b. Since the length of the contact terminal of the memory card socket is generally long, the above-described non-correlated crosstalk is remarkably generated in the contact terminal portion of the socket 11b.
- FIG. 4A to 4E are schematic views showing the configuration of the memory card socket 400 according to the first embodiment of the present invention.
- FIG. 4A is a top view of the memory card socket 400, and dotted and broken lines represent perspective views of a portion covered with the cover shell 310.
- FIG. 4B is a back view of the memory card socket 400.
- the upper part of FIG. 4C is a cross-sectional view of section A3-B3 in FIG. 4A, and the lower part is a cross-sectional view of section A3′-B3 ′ of FIG.
- FIG. 4 (d) shows a case where a memory card 1b having a differential transmission pin for high-speed signal transmission and a right and left pin adjacent to the differential pair pin being a stable potential pin having a different potential is inserted.
- FIG. 4E The upper part of FIG. 4E is a cross-sectional view of section A4-B4 in FIG. 4D, and the lower part is a cross-sectional view of section A4′-B4 ′ of FIG.
- the memory card socket 400 shown in FIGS. 4A to 4E includes contact terminals 210 to 227, a body portion 420, a cover shell 410, a cover shell fixing terminal 430, and the like.
- the contact terminals 210 to 227 are made of a conductive material and are in contact with the pins of the memory card 1b. Signal contacts, power supplies, and ground potentials between the memory card 1b and the host device on which the memory card socket 400 is mounted. Supply.
- the body 420 is made of a non-conductive material such as a resin material, and serves to fix each contact terminal and hold the memory card 1b.
- the cover shell 410 is made of a metal material or the like, constitutes an exterior portion of the memory card socket 400, and shields unnecessary electromagnetic radiation from the memory card 1b to the outside.
- the cover shell fixing terminal 430 is a terminal for mounting the cover shell 410 on the printed circuit board of the host device.
- the memory card socket 400 according to the first embodiment includes a differential transmission pin pair P8 (S +) and P9 (S ⁇ ), and two stable potential pins P7 (G) adjacent to them.
- P10 (V2) is a memory card socket corresponding to the memory card 1b, which is a different potential pin.
- 224 have contact shapes connected to stable potential pins P7 (G) and P11 (G) of the same potential provided in the memory card 1b.
- the pin arrangement is as follows: ground pin P7 (G), differential pin P8 (S +), differential pin P9 (S ⁇ ), power supply Pin P10 (V2) and ground pin P11 (G). Therefore, in the memory card socket 400, the contact terminal 224 adjacent to the contact terminal 222 connected to the differential pin P9 (S ⁇ ) of the memory card 1b is not the power supply pin P10 (V2) of the memory card 1b but the ground pin. Connect to P11 (G).
- the ground pin P11 (G) is a pin having a stable potential that is the same as that of the ground pin P7 (G).
- the contact terminals 220 and 224 at both ends adjacent to the differential transmission contact terminals P8 (S +) and P9 (S ⁇ ) have the same stable potential. Therefore, even when a current such as power supply noise or a signal return current flows, a current having the same phase flows through the contact terminals 220 and 224. For this reason, in-phase crosstalk is superimposed on the differential transmission contact terminals 221, 222. However, the differential signal quality is not affected because the crosstalk cancels each other due to the advantages of the differential transmission method described above.
- the stable potential pin P10 (V2) disposed beside the differential pin P9 (S ⁇ ) on the memory card 1b is connected to the contact terminal 223 of the memory card socket 400. Since the contact terminal 223 is connected to the pin P10 (V2) on the memory card 1b having a stable potential different from that of the contact terminals 220 and 224, the flowing current component is also the current component flowing to the contact terminals 220 and 224. There is no correlation. For this reason, in order to suppress crosstalk from the contact terminal 223 to the differential transmission contact terminals P8 (S +) and P9 (S ⁇ ), the contact terminal 223 is pulled out from the contact terminals 221 and 222 and the contact terminals 220 and 224. Pull out in a different direction. As a result, the influence of crosstalk caused by the contact terminal 223 can be suppressed.
- the distance between the differential transmission contact terminals 222 and 224 is preferably equal to the distance between the differential transmission contact terminals 221 and 220. This can balance the coupling between the contact terminal 224 and the contact terminal 222 and the coupling between the contact terminal 220 and the contact terminal 221. As a result, the characteristic of the crosstalk noise from the contact 224 to the contact 222 and the characteristic of the crosstalk noise from the contact 220 to the contact 221 can be made equal, so that the common-mode noise canceling effect of the differential transmission method can be enhanced. It is.
- the shape of the contact terminal 224 As the shape of the contact terminal 224, the shape shown in FIGS. 5A to 5C is desirable.
- the contact terminal 224 in FIG. 5A is wider in the portion adjacent to and parallel to the contact terminal 222 in FIG. 4D than the contact terminal 220, and the resistance value of this portion can be lowered.
- the host device and the stable potential pin P11 (G) of the memory card 1b can be connected with low impedance. Therefore, there is an effect of reducing a voltage drop when supplying power from the host device to the memory card 1b or supplying a ground potential.
- 5B and 5C a slit or window hole is provided in the contact terminal, and the width of the portion that runs adjacent to the contact terminal 222 in FIG. 4D is approximately equal to the width of the other contact terminals.
- the configuration is the same. With such a configuration, the contact pressure between the memory card 1b and the contact terminal generated when the card is inserted can be made equal to other contact terminals. Therefore, the reliability of connection between each pin of the memory card 1b and each contact terminal of the memory card socket 400 can be improved. Further, since the contact pressure of the contact terminal 224 can be made equal to that of the other contact terminals (suppressed to the same contact pressure), the pin generated when the contact terminal 224 contacts the pin P11 (G) of the memory card 1b. It also has the effect of suppressing surface deterioration (displacement).
- contact terminals 224a and 224b as shown in FIGS. 6A, 6B, and 6C may be used.
- the contact terminal 224a shown in FIG. 6A has a shape whose width is equal to that of the contact terminal 220 and the contact terminal 224b in a portion that is adjacent to and parallel to the contact terminal 222 of FIG.
- the contact pressure between the memory card 1b and the contact terminal generated when the memory card is inserted can be made equal to that of the other contact terminals, so each pin of the memory card 1b and the memory card socket The reliability of connection with the 400 contact terminals can be improved.
- the contact pressure of the contact terminals 224a and 224b can be made equal to that of the other contact terminals (suppressed to the same contact pressure), the contact terminals 224a and 224b are in contact with the pin P11 (G) of the memory card 1b. This also has the effect of suppressing deterioration (displacement) of the pin surface that occurs. Furthermore, since the contact terminals 224a and 224b are independent contact terminals, the number of contact points with the contact terminals at the stable potential pin P11 (G) of the memory card 1b can be increased. Therefore, the contact resistance between the stable potential pin P11 (G) and the contact terminal can be reduced, and the effect of reducing the voltage drop when the power is supplied from the host device to the memory card 1b or the ground potential is obtained. be able to.
- the contact terminals 221 and 222 connected to the differential transmission pins P8 (s +) and P9 (s ⁇ ) of the memory card 1b are as symmetrical as possible.
- the contact terminal 220 connected to the stable potential pin P7 (G) and the contact terminal 222 adjacent to the pin P11 (G) having the same potential as the stable potential pin P7 (G) are adjacent to the contact terminal 222.
- the shapes of the parallel running portions be as symmetrical as possible.
- the contact terminals 221 and 222 can balance the coupling from the stable potential contact terminals at both ends adjacent to each other. Therefore, the common-mode noise canceling effect of the differential transmission method can be enhanced, and the effect of maintaining the quality of the differential signal can be obtained.
- the contact terminal 224 is preferably an h-shaped alphabet, and the width w2 is preferably equal to the width w1 of the contact terminal 220.
- the contact terminals 224a and 224b shown in FIGS. 6A, 6B, and 6C are used instead of the contact terminals 224, the contact terminals 224a of the contact terminals 224a run adjacent to each other. The same effect can be obtained even if the width w2 of the portion is as symmetrical as possible with the width w1 of the contact terminal 220.
- the contact terminals 221 and 222 connected to the differential transmission pins P8 (s +) and P9 (s ⁇ ) of the memory card 1b are as symmetrical as possible.
- the shape of the parallel running portions be as symmetrical as possible (for example, in FIG. 4D, the width w1 and the width w2 are equal).
- the distance between the differential transmission contact terminal 222 and the stable potential supply contact terminal 224 is made equal to the distance between the differential transmission contact terminal 221 and the stable potential supply contact terminal 220 (the width w3 and the width w4 are equal). It is desirable.
- the coupling between the contact terminal 224 and the contact terminal 222 and the coupling between the contact terminal 220 and the contact terminal 221 can be further balanced. Can be further enhanced.
- the same effect can be obtained by the following configuration. That is, in this memory card socket 400, the contact terminals 221 and 222 of the memory card socket 400 connected to the differential transmission pins P8 (s +) and P9 (s ⁇ ) of the memory card 1b are as symmetrical as possible. It is preferable that the width w1 and the width w2 are equal (for example, in FIG. 4D).
- FIG. 7 is a schematic perspective view showing a configuration of a conventional USB connector 50.
- FIG. 8 is a front view of the USB connector 50 of FIG. 7 as viewed from the cable connection surface (A).
- FIG. 9 is a rear view of the USB connector 50 of FIG. 7 as viewed from the back (B).
- 10A is a front view of the USB terminal 21 on the connection surface of the USB cable 20, and
- FIG. 10B is a plan view of the vicinity of the end of the USB cable 20, and FIG.
- FIG. 11A is a perspective view showing the configuration of the back side of the conventional USB connector 50
- FIG. 11B is a perspective view showing the configuration of the back side of the USB connector 30 according to the second embodiment. is there.
- the USB cable 20 includes a pair of differential transmission pins P (S +) and P (S ⁇ ), a ground potential G, a power supply potential V, as shown in the sectional view of the cable portion 23 in FIG.
- the four lines are arranged at substantially equal distances in the sectional view. Therefore, in the state of the cable portion 23 of the USB cable 20, even if noise is applied to the differential transmission pins P (S +) or P (S ⁇ ) from the respective lines of the ground potential G and the power supply potential V, there is no difference. The noise is almost equally applied to each of the dynamic transmission pins P (S +) and P (S ⁇ ). Therefore, the noise can be canceled in the cable portion 23 of the USB cable 20.
- the cable portion 23 has four wires, ie, a pair of differential transmission pins P (S +) and P (S ⁇ ), a ground potential G, and a power supply potential V, from the inside to the outside.
- the inner shield 27a, the polyvinyl chloride jacket 27b, and the outer shield 27c are covered in this order.
- a drain wire 28 is provided.
- the USB terminal 24 for connecting to the connector at the end of the USB cable 20 has a rectangular shape from the circular cross-section cable portion 23 through the overmold portion 22 as shown in the plan view of FIG. It has an end covered with a shell 21. As shown in the front view of FIG. 10A, the end covered with the shell 21 is provided with an insulating portion 25 below, and a pair of differential transmission pins P on the insulating portion 25. (S +) and P (S ⁇ ), a terminal of the ground potential G and a terminal of the power supply potential V are arranged across the both sides. Further, a gap 26 is provided above the gap.
- the conventional USB connector 50 is covered with a shell 51 and has a cable connection surface (A) and a back surface (B). In addition, it has an insulation part inside a cable connection surface (A).
- an insulating portion 52 is disposed on the upper side, and a ground potential G of the USB terminal 24 and a differential transmission pin P ( Four contact terminals 63, 61, 62, 64 connected to the pins S +) and P (S ⁇ ) and the power supply potential V are arranged in a line.
- the insulating part 52 above the USB connector 50 is accommodated in the gap part 26 on the USB terminal 24 side.
- the insulating portions 25 and 52 are opposed to each other, and therefore cannot be inserted substantially. That is, the insulating portion 25 of the USB terminal 24 and the insulating portion 51 of the USB connector 50 are provided so that the direction in which the USB terminal 24 is inserted into the USB connector 50 is a fixed direction.
- the ground potential G of the USB terminal 24 When the USB connector 50 is viewed from the back (B), as shown in FIG. 9, the ground potential G of the USB terminal 24, the differential transmission pins P (S +) and P (S ⁇ ), the power supply potential V, The ends of the four contact terminals 63, 61, 62, 64 connected to the respective pins are led downward from the connector 50.
- the four contact terminals 63, 61, 62, 64 correspond to the ground potential G of the USB terminal 20, the differential transmission pins P (S +) and P (S ⁇ ), and the power supply potential V, respectively. Yes.
- the potentials of the two third and fourth contact terminals 63 and 64 corresponding to the stable potential pins on both sides are different from each other.
- the current component uncorrelated to the first and second contact terminals 61 and 62 corresponding to the differential signal pins is differentially detected as crosstalk noise in the USB connector 50 portion.
- the non-correlated crosstalk noise cannot be canceled on the differential signal receiving side (differential receiver; not shown).
- the fifth contact terminal 35 connected to the power supply potential V of the USB terminal 20 is a pair of first and second contact terminals 31 connected to the differential transmission pins P (S +) and P (S ⁇ ). , 32 are shortened to the outside of the fourth contact terminal 34 having the ground potential G to be taken out.
- the fifth contact terminal 35 may be provided as necessary.
- the interval w3 between the first contact terminal 31 and the third contact terminal 33 that run adjacent to each other is equal to the second contact terminal 32 and the fourth contact terminal 32. It is preferable that the contact terminal 34 is equal to the interval w4 between the parts that are adjacent to each other and run in parallel.
- first contact terminal 31 and the second contact terminal 32 have a line-symmetric shape
- the third contact terminal 33 is adjacent to the first contact terminal 31 and is parallel to each other.
- the four contact terminals 34 are preferably line-symmetrical.
- the third contact terminal 33 includes a portion running in parallel with the first contact terminal 31, and Of the third contact terminal 33, the shape of the parallel portion with the first contact terminal 31 is preferably a line-symmetric shape with the shape of the fourth contact terminal 34.
- the distance w3 between the adjacent parallel running portion and the first contact terminal 31 is the second contact. It is equal to the interval w4 between the terminal 32 and the fourth contact terminal 34, and The width of the third contact terminal 33 in the adjacent parallel running portion is preferably equal to the width of the fourth contact terminal 34.
- a high-speed interface connector includes a differential transmission pin pair and a differential transmission system signal pin array having a pin array in which the potentials of stable potential pins located adjacent to both sides thereof are different from each other, This is a high-speed interface connector for cables and the like.
- the high-speed interface connector has two contact terminals on both sides adjacent to a pair of contact pins connected to a differential transmission pin of a differential transmission system signal pin array. Each pin has a characteristic of being connected to each pin, and is useful as a high-speed interface connector for high-speed differential transmission.
- P14 (G) Card pin Dif1, Dif2 A portion showing a differential pin pair and stable potential pins at both ends thereof 20 USB cable 21 Shell 22 Overmolding portion 23 Cable portion 24 USB terminal 25 Insulating portion 26 Air gap portion 27a Internal shield 27b Polyvinyl chloride jacket 27 External shield 28 Drain wire 30 USB connector 31 First contact terminal 32 Second contact terminal 33 Third contact terminal 34 Fourth contact terminal 35 Fifth contact terminal 50 USB connector 51 Shell 52 Insulating part 61 First contact terminal 62 Second contact Terminal 63 Third contact terminal 64 Fourth contact terminal
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Abstract
Description
前記一対の差動伝送方式の信号用ピンにそれぞれ接続し、互いに隣接する差動伝送方式の第一及び第二のコンタクト端子と、
前記第1及び第2のコンタクト端子の両側を挟む第三及び第四のコンタクト端子であって、前記第一のコンタクト端子と隣接する前記第三のコンタクト端子は、前記二本の安定電位ピンのうちの一つと接続され、前記第二のコンタクト端子と隣接する前記第四のコンタクト端子は、前記第三のコンタクト端子と同じ電位を有する、第三及び第四のコンタクト端子と、
を含む。
前記メモリーカードの前記第一、第二の差動伝送方式の信号用ピンにそれぞれ接続し、互いに隣接する差動伝送方式の第一及び第二のコンタクト端子と、
前記第一及び第二のコンタクト端子対の両側を挟んで隣接する第三及び第四のコンタクト端子であって、前記第三のコンタクト端子は、前記第一のコンタクト端子に隣接し、前記第一のコンタクト端子に対して前記第二のコンタクト端子とは反対側に位置し、前記第四のコンタクト端子は、前記第二のコンタクト端子に隣接し、前記第二のコンタクト端子に対して前記第一のコンタクト端子とは反対側に位置する、第三及び第四のコンタクト端子と、
を備え、
前記第四のコンタクト端子は、前記メモリーカードの前記第四のピンと接続され、前記第三のコンタクト端子は、前記メモリーカードの前記第三のピンではなく、前記第四のピンと同一の安定電位に接続された前記第五のピンに接続されていることを特徴とする。
まず、差動伝送方式を導入したメモリーカードについて説明する。
これまでシングルエンド伝送方式を用いてホスト機器と信号伝送を行ってきたメモリーカードに差動伝送方式を導入するには、2つの実現方法が考えられる。
一つ目は、図1に示すように、メモリーカードの既存の信号ピンP(S)をシングルエンド伝送、及び差動伝送の両方の伝送方式で供用することである(以降、「ピン供用構成」と称する。)。この「ピン併用構成」を用いたメモリーカードを参考例1のメモリーカードとする。この「ピン併用構成」では、メモリーカード内のコントローラLSI2は、シングルエンド伝送用I/O回路5、及び差動伝送用I/O回路6を具備する(ホスト機器側のコントローラLSI12も同様の構成)。また、シングルエンド用I/O回路5と差動伝送用I/O回路6は、メモリーカード1a内のプリント基板上の配線4、メモリーカードソケット11aのコンタクト端子(図示せず)、及びホスト機器のプリント基板上の配線14を供用する構成となる。
差動伝送方式を、シングルエンド伝送方式を用いてホスト機器と信号伝送を行ってきたメモリーカードに導入するための2つ目の実現方法として、差動伝送専用に新たに専用ピンを追加する方法(以降、「差動ピン追加構成」と称する。)がある。この「差動ピン追加構成」を用いたメモリーカードを参考例2のメモリーカードとする。
例えば、図1のメモリーカード1aに新設の差動ピンを追加する場合、図2のメモリーカード1bに示すような追加ピン配置が構成例として考えられる。図2のメモリーカード1bの新規追加ピン(2列目のピン列)において、差動ピンP(S+)、P(S-)はそのピンサイズを小さくし、ピン部分に発生する負荷容量成分を抑え、かつ、両側を安定電位のピンP(GND)またはP(VDD2)で囲うことで、高速差動伝送で重要なインピーダンス整合を図るものである。
次に、特に、参考例2の差動伝送方式を導入したメモリーカードを用いる場合のメモリーカードソケットについて説明する。
図4(a)~(e)は、本発明の実施形態1におけるメモリーカードソケット400の構成を示す概略図である。具体的には、図4(a)は、メモリーカードソケット400の上面図であり、点線および破線部はカバーシェル310で覆われている部分の透視図をあらわす。また図4(b)は、メモリーカードソケット400の裏面図である。図4(c)の上段は、図4(a)の区間A3-B3の断面図であり、下段は、図4(a)の区間A3’-B3’の断面図である。図4(d)は、高速信号伝送向けの差動伝送用ピンを具備し、かつ、その差動ペアピンの隣接する左右のピンが異なる電位の安定電位ピンであるメモリーカード1bを挿入した場合を示す概略図である。図4(e)の上段は、図4(d)の区間A4-B4の断面図であり、下段は、図4(d)の区間A4’-B4’の断面図である。
コンタクト端子210~227は、導電性の材質からなり、メモリーカード1bのピンと接触し、メモリーカード1bと該メモリーカードソケット400が実装されるホスト機器の間での信号伝送、電源、及びグランド電位の供給を行う。
ボディ部420は、樹脂材料などの非導電性材質からなり、各コンタクト端子を固定し、かつ、メモリーカード1bを保持する役割を果たす。
カバーシェル410は、金属材質などからなり、メモリーカードソケット400の外装部分を構成し、メモリーカード1bから外部への不要電磁輻射をシールドする。
カバーシェル固定端子430は、カバーシェル410をホスト機器のプリント基板に実装するための端子である。
図5(a)のコンタクト端子224は、図4(d)のコンタクト端子222と隣接して並走する部分の幅が、コンタクト端子220よりも広く、この部分の抵抗値を下げることができるため、ホスト機器とメモリーカード1bの安定電位ピンP11(G)を低インピーダンスで接続することができる。従って、ホスト機器からメモリーカード1bへの電源供給、もしくはグランド電位の供給の際の電圧降下を低減する効果がある。
図5(b)、(c)は、コンタクト端子にスリットもしくは窓穴を設け、図4(d)のコンタクト端子222と隣接して並走する部分の幅は、概ね他のコンタクト端子の幅と同じとする構成である。このような構成にすることで、カード挿入時に発生するメモリーカード1bとコンタクト端子との接圧を、その他のコンタクト端子と同等にすることができる。そのため、メモリーカード1bの各ピンと、メモリーカードソケット400の各コンタクト端子との接続の信頼性を高めることができる。またコンタクト端子224の接圧をその他のコンタクト端子と同等にする(同程度の接圧に抑える)ことができるので、コンタクト端子224がメモリーカード1bのピンP11(G)と接触することで起こるピン表面の劣化(けずれ)を抑える効果も得る。
また、コンタクト端子224の代わりに、図6(a),(b),(c)に示すコンタクト端子224aおよび224bとした場合においても、コンタクト端子224aのうちコンタクト端子222に隣接して並走する部分の幅w2がコンタクト端子220の幅w1とできるだけ線対称な形状としても同様の効果を得ることができる。
図7は、従来のUSBコネクタ50の構成を示す概略斜視図である。また、図8は、図7のUSBコネクタ50のケーブル接続面(A)から見た正面図である。図9は、図7のUSBコネクタ50の背面(B)から見た背面図である。さらに、図10(a)は、USBケーブル20の接続面のUSB端子21の正面図であり、図10(b)は、USBケーブル20の端部付近の平面図であり、図10(c)は、USBケーブル20のケーブル部分23の断面構造を示す断面図である。図11(a)は、従来のUSBコネクタ50の背面側の構成を示す斜視図であり、図11(b)は、実施の形態2に係るUSBコネクタ30の背面側の構成を示す斜視図である。
第三のコンタクト端子33のうち、第一のコンタクト端子31との並走部分の形状は、第四のコンタクト端子34の形状と線対称形状であることが好ましい。
該隣接並走部分における第三のコンタクト端子33の幅は、第四のコンタクト端子34の幅と等しいことが好ましい。
2、12 コントローラLSI
3 フラッシュメモリ
4、14 基板配線
5、15 シングルエンド用I/O回路
6、16 差動伝送用I/O回路 10 ホスト機器
11a、11b メモリーカードソケット
110~127、210~227 メモリーカードソケットのコンタクト端子
300、400 メモリーカードソケット
310、410 カバーシェル
320、420 ボディ部
330、430 カバーシェル固定端子
340、440 カバーシェルの窓穴
P(P1(G)、P2(S)・・・P14(G)) カードピン
Dif1、Dif2 差動ピンペア及びその両端の安定電位ピンを示す部分
20 USBケーブル
21 シェル
22 オーバモールド部
23 ケーブル部分
24USB端子
25 絶縁部
26 空隙部
27a 内部シールド
27b ポリ塩化ビニルジャケット
27c 外部シールド
28 ドレインワイヤ
30 USBコネクタ
31 第一コンタクト端子
32 第二コンタクト端子
33 第三コンタクト端子
34 第四コンタクト端子
35 第五コンタクト端子
50 USBコネクタ
51 シェル
52 絶縁部
61 第一コンタクト端子
62 第二コンタクト端子
63 第三コンタクト端子
64 第四コンタクト端子
Claims (17)
- 互いに隣接する一対の差動伝送方式の信号用ピンと、前記一対の差動伝送方式の信号用ピンの両側を挟む二本の安定電位ピンとを含む差動伝送方式信号ピン配列であって、前記二本の安定電位ピンは互いに異なる電位を有する、差動伝送方式信号ピン配列を有するケーブルもしくはメモリーカードを接続するための高速インタフェース用コネクタであって、
前記一対の差動伝送方式の信号用ピンにそれぞれ接続し、互いに隣接する差動伝送方式の第一及び第二のコンタクト端子と、
前記第1及び第2のコンタクト端子の両側を挟む第三及び第四のコンタクト端子であって、前記第一のコンタクト端子と隣接する前記第三のコンタクト端子は、前記二本の安定電位ピンのうちの一つと接続され、前記第二のコンタクト端子と隣接する前記第四のコンタクト端子は、前記第三のコンタクト端子と同じ電位を有する、第三及び第四のコンタクト端子と、
を含む、高速インタフェース用コネクタ。 - 前記二本の安定電位ピンのうちのもう一方と接続された第五のコンタクト端子を、さらに含む、請求項1に記載の高速インタフェース用コネクタ。
- 前記第一のコンタクト端子と前記第三のコンタクト端子とは、互いに隣接して並走する部分の間隔が、前記第二のコンタクト端子と前記第四のコンタクト端子とが互いに隣接して並走する部分の間隔に等しいことを特徴とする請求項1に記載の高速インタフェース用コネクタ。
- 前記第一のコンタクト端子と前記第二のコンタクト端子とは線対称形状であると共に、前記第三のコンタクト端子は、前記第一のコンタクト端子と互いに隣接して並走する部分は、前記第四のコンタクト端子と線対称形状であることを特徴とする請求項1から3のいずれか一項に記載の高速インタフェース用コネクタ。
- 前記第三のコンタクト端子は、前記第一のコンタクト端子と互いに隣接して並走している部分を具備すると共に、
前記第三のコンタクト端子のうち、前記第一のコンタクト端子との並走部分の形状は、前記第四のコンタクト端子の形状と線対称形状であることを特徴とする請求項1から3のいずれか一項に記載の高速インタフェース用コネクタ。 - 前記第三のコンタクト端子のうち、前記第一のコンタクト端子と互いに隣接して並走する部分において、該隣接並走部分と前記第一のコンタクト端子との間隔は、前記第二のコンタクト端子と前記第四のコンタクト端子との間隔と等しいと共に、
該隣接並走部分における前記第三のコンタクト端子の幅は、前記第四のコンタクト端子の幅と等しいことを特徴とする請求項1から3のいずれか一項に記載の高速インタフェース用コネクタ。 - 前記差動伝送方式信号ピン配列がメモリーカードの差動伝送方式信号ピン配列である、請求項1から6のいずれか一項に記載の高速インタフェース用コネクタ。
- 互いに隣接する第一、第二のピンは差動伝送方式の信号用ピンであり、前記第一、第二のピン対の両側を挟む第三、第四のピンのうち、前記第三のピンは前記第一のピンに隣接し、前記第一のピンに対して前記第二のピンとは反対側に位置し、前記第四のピンは前記第二のピンに隣接し、前記第二のピンに対して前記第一のピンとは反対側に位置し、前記第三、第四のピンは互いに同一の電位を有しないカードピン配列を有すると共に、前記第四のピンと同一の安定電位に接続された第五のピンを有する差動伝送方式のメモリーカードに対応するメモリーカードソケットであり、
前記メモリーカードの前記第一、第二の差動伝送方式の信号用ピンにそれぞれ接続し、互いに隣接する差動伝送方式の第一及び第二のコンタクト端子と、
前記第一及び第二のコンタクト端子対の両側を挟む第三及び第四のコンタクト端子であって、前記第三のコンタクト端子は、前記第一のコンタクト端子に隣接し、前記第一のコンタクト端子に対して前記第二のコンタクト端子とは反対側に位置し、前記第四のコンタクト端子は、前記第二のコンタクト端子に隣接し、前記第二のコンタクト端子に対して前記第一のコンタクト端子とは反対側に位置する、第三及び第四のコンタクト端子と、
を備え、
前記第四のコンタクト端子は、前記メモリーカードの前記第四のピンと接続され、前記第三のコンタクト端子は、前記メモリーカードの前記第三のピンではなく、前記第四のピンと同一の安定電位に接続された前記第五のピンに接続されていることを特徴とするメモリーカードソケット。 - 前記第一のコンタクト端子と前記第三のコンタクト端子は、互いに隣接して並走する部分の間隔が、前記第二のコンタクト端子と前記第四のコンタクト端子とが互いに隣接して並走する部分の間隔に等しいことを特徴とする請求項8に記載のメモリーカードソケット。
- 前記第三のコンタクト端子は、前記第一のコンタクト端子と互いに隣接して並走している部分を具備すると共に、
前記第三のコンタクト端子は、前記メモリーカードの前記第五のピンと接続する部分においては、前記第一のコンタクト端子との間隔を広げ、前記メモリーカードの前記第五のピンに接続する形状を有することを特徴とする請求項8又は9に記載のメモリーカードソケット。 - 前記第三のコンタクト端子の幅は、前記第一のコンタクト端子と互いに隣接して並走する部分においては、前記第四のコンタクト端子の幅よりも広いことを特徴とする請求項10に記載のメモリーカードソケット。
- 前記第三のコンタクト端子は、前記メモリーカードの前記第五のピンに接続する部分において、前記メモリーカードソケット上で前記第三のコンタクト端子を固定する方向を見たとき、前記第一のコンタクト端子側には角度を変えずに前記第一のコンタクト端子と並行して伸展する部分を別に具備することを特徴とする請求項10に記載のメモリーカードソケット。
- 前記第一のコンタクト端子と前記第二のコンタクト端子とは線対称形状であると共に、前記第三のコンタクト端子は、前記第一のコンタクト端子と互いに隣接して並走する部分は、前記第四のコンタクト端子と線対称形状であることを特徴とする請求項8から12のいずれか一項に記載のメモリーカードソケット。
- 前記第三のコンタクト端子のうち、前記第一のコンタクト端子との並走部分の形状は、前記第四のコンタクト端子の形状と線対称形状であると共に、
前記第三のコンタクト端子は、前記メモリーカードの前記第五のピンに接続する部分において前記メモリーカードソケット上で前記第三のコンタクト端子を固定する方向を見たとき、前記第一のコンタクト端子側には角度を変えずに前記第一のコンタクト端子と並行して伸展する部分を別に具備することを特徴とする請求項13に記載のメモリーカードソケット。 - 前記第三のコンタクト端子は、前記第一のコンタクト端子と互いに隣接して並走している部分を具備すると共に、
前記第三のコンタクト端子のうち、前記第一のコンタクト端子との並走部分の形状は、前記第四のコンタクト端子の形状と線対称形状であることを特徴とする請求項13に記載のメモリーカードソケット。 - 前記第三のコンタクト端子とは独立した第五のコンタクト端子をさらに備え、前記第五のコンタクト端子は、前記メモリーカードの前記第五のピンとも接続することを特徴とする請求項8から15のいずれか一項に記載のメモリーカードソケット。
- 前記第三のコンタクト端子のうち、前記第一のコンタクト端子と互いに隣接して並走する部分において、該隣接並走部分と前記第一のコンタクト端子との間隔は、前記第二のコンタクト端子と前記第四のコンタクト端子との間隔と等しいと共に、
該隣接並走部分における前記第三のコンタクト端子の幅は、前記第四のコンタクト端子の幅と等しいことを特徴とする請求項11から16のいずれか一項に記載のメモリーカードソケット。
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JP3775338B2 (ja) | 2001-11-15 | 2006-05-17 | 松下電工株式会社 | メモリカード用コネクタ装置及びその製造方法 |
US6981885B2 (en) * | 2001-12-11 | 2006-01-03 | Molex Incorporated | Secure digital memory card socket |
JP4799871B2 (ja) * | 2005-01-13 | 2011-10-26 | タイコエレクトロニクスジャパン合同会社 | カードコネクタ |
TW200627724A (en) * | 2005-01-24 | 2006-08-01 | Top Yang Technology Entpr Co | Metallic sliding slot structure for an electrical connector |
US20110145465A1 (en) | 2009-12-14 | 2011-06-16 | Kabushiki Kaisha Toshiba | Semiconductor memory card |
-
2012
- 2012-02-03 CN CN2012800005470A patent/CN102763285A/zh active Pending
- 2012-02-03 WO PCT/JP2012/000727 patent/WO2012111270A1/ja active Application Filing
- 2012-02-03 JP JP2012524967A patent/JP5068895B2/ja not_active Expired - Fee Related
- 2012-02-03 US US13/574,863 patent/US8708749B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2004071175A (ja) | 2002-08-01 | 2004-03-04 | Matsushita Electric Works Ltd | メモリカード用コネクタ装置 |
JP2011028303A (ja) | 2004-05-17 | 2011-02-10 | Ricoh Co Ltd | 画像形成装置 |
JP2010080416A (ja) * | 2008-08-29 | 2010-04-08 | Panasonic Electric Works Co Ltd | メモリカードソケット |
JP2010061474A (ja) | 2008-09-04 | 2010-03-18 | Panasonic Electric Works Co Ltd | メモリカードソケット |
JP2011146020A (ja) * | 2009-12-14 | 2011-07-28 | Toshiba Corp | 半導体メモリカード |
Also Published As
Publication number | Publication date |
---|---|
JP5068895B2 (ja) | 2012-11-07 |
CN102763285A (zh) | 2012-10-31 |
US8708749B2 (en) | 2014-04-29 |
JPWO2012111270A1 (ja) | 2014-07-03 |
US20130045635A1 (en) | 2013-02-21 |
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