CN2382169Y

CN2382169Y - Electronic switching device for universal series bus interface

Info

Publication number: CN2382169Y
Application number: CN 99213861
Authority: CN
Inventors: 陈尚仲
Original assignee: 陈尚仲
Current assignee: Aten International Co Ltd
Priority date: 1999-06-18
Filing date: 1999-06-18
Publication date: 2000-06-07
Anticipated expiration: 2009-06-18

Abstract

The utility model relates to an electronic switching device with a universal series bus (USB) interface. A plurality of devices with USB interfaces can be connected with the electronic switching device with the USB interface and are switched and connected with correlated devices according to need. The electronic switching device with the USB interface starts a switching switch to make a trigger signal generator generate the trigger signal. The control signal generator receives the trigger signal and then sends out the control signal, and the correlated devices with USB interfaces are connected. A delay signal generator is designed to make the control signal delay a period of time to send out to prevent the order switching switch from switching on the middle temporarily connected other devices when the order switching switch selects the correlated devices to cause signal confusion and machine trouble.

Description

The electronic type switching device shifter of universal serial bus interface

The utility model is the switching device shifter about a kind of universal serial bus (USB) interface, refers to a kind of interconnected electronic type switching device shifter of device that several can be had the USB interface especially, to reach the purpose that the device tts resource is shared.

The switching device shifter of tradition USB interface is the mechanical type switching device shifter, do to switch when selecting and order to switch, when not wishing device for switching through middle other, because the electronic installation reaction is exceedingly fast, in the process of switching, although switching time, extremely short also can making between each device produced actions such as detecting, communication, and when switching fast, connect hours deficiency between each device often causes great signal confusion easily and works as machine.

And the mechanical type switching device shifter is easier to the situation that produces loose contact, pull effort, and is very inconvenient in the use.

Main purpose of the present utility model is to provide the electronic type switching device shifter of a kind of universal serial bus (USB) interface, when the order diverter switch is selected relevant apparatus, and during through the middle device that other do not wish to connect, do not have because of the effect of delay signal generator between each device the short time annexation, avoided starting the situation of uncorrelated device, make that signal can not take place between each device is chaotic and when the situation of machine.

Another purpose of the present utility model is to provide the electronic type switching device shifter of a kind of universal serial bus (USB) interface, to replace the mechanical type switching device shifter of traditional USB, avoids loose contact, pulls the problem of effort.

Principle of the present utility model, effect and effect, then can be clear fully with reference to following each Figure of description and explanation:

Fig. 1 is the circuit box schematic diagram of the utility model one preferred embodiment.

Fig. 2 is the circuit diagram of the utility model preferred embodiment.

Fig. 3 is the circuit diagram of another preferred embodiment of the utility model.

Fig. 4 is the circuit diagram of the another preferred embodiment of the utility model.

Fig. 5 is the preferred embodiment circuit box schematic diagram of the utility model additional delay signal generator.

Fig. 6 is the preferred embodiment circuit diagram of the utility model additional delay signal generator.

Fig. 7 is the preferred embodiment circuit box schematic diagram of the utility model additional display.

Fig. 8 is the preferred embodiment circuit diagram of the utility model additional display.

Fig. 9 is the preferred embodiment circuit box schematic diagram of the additional initial signal generator of the utility model.

Figure 10 is the preferred embodiment circuit diagram of the additional initial signal generator of the utility model.

The element shown symbol is to as directed:

Triggering signal generator----------------------------11

Control signal generator----------------------------12

Connector------------------------------------13

First universal serial bus (USB) interface---------------14

Second universal serial bus (USB) interface---------------15

The 3rd general serial bus (USB) interface---------------16

Delay signal generator----------------------------17

Display------------------------------------18

Initial signal generator----------------------------19

Diverter switch---------------------------------SW1

First resistor--------------------------------R1

Second resistor--------------------------------R2

The 3rd resistor--------------------------------R3

The 4th resistor--------------------------------R4

First capacitor--------------------------------C1

Second capacitor--------------------------------C2

The 4th capacitor--------------------------------C4

The one D type flip-flop-----------------------------U2

The 2nd D type flip-flop-----------------------------U4

First multiplexer--------------------------------U3

Second multiplexer--------------------------------U3 '

First diode--------------------------------D1

First light-emitting diode--------------------------LED1

Second light-emitting diode--------------------------LED2

Please referring to Fig. 1, the circuit box schematic diagram of the utility model one preferred embodiment, as shown in the figure, the utility model comprises triggering signal generator 11, control signal generator 12, connector 13, wherein:

Triggering signal generator 11, its output links to each other with the input of control signal generator 12, has one to switch switch SW 1 (asking for an interview Fig. 2) in the triggering signal generator 11, when the user presses diverter switch SW1, just sends a triggering signal to control signal generator 12.

Control signal generator 12, its input is connected with the output of triggering signal generator 11, and output then is connected with the input of connector 13, and it receives the triggering signal that triggering signal generator 11 is sent, and after treatment, sends and controls signal to connector 13.

Connector 13, its input links to each other with first universal serial bus (USB) interface 14 and second universal serial bus (USB) interface 15, and output then links to each other with the 3rd general serial bus (USB) interface 16.After connector 13 receives the control signal that control signal generator 12 sent, the 3rd USB interface 16 is linked to each other with a USB interface 14 or the 2nd USB interface 15 according to control signal.

Secondly with reference to figure 2, the detailed circuit of the utility model one preferred embodiment is described.Comprise triggering signal generator 11, control signal generator 12, connector 13, wherein:

Triggering signal generator 11, it switches switches set with a resistor, a capacitor and and becomes.First resistor R 1 and the first capacitor C1 are serially connected between power supply (VCC) and the ground (GND), one end of first resistor R 1 is connected with power supply (VCC), the other end then is connected with the end of the first capacitor C1, the other end of the first capacitor C1 then is connected to ground (GND), and the end of diverter switch SW1 is connected to ground (GND), the other end then is connected to the end that first resistor R 1 is connected with the first capacitor C1, and its current potential is V1.When diverter switch does not start, not conducting of diverter switch SW1, current potential V1 keeps a high potential (HIGH), when diverter switch starts, diverter switch SW1 conducting, V1 is connected to ground (GND), changes into electronegative potential (LOW) by high potential (HIGH).When SW1 is changed into when opening circuit by conducting again, current potential V1 then gets back to high potential (HIGH) because of the charging of the first capacitor C1, so make the first capacitor C1 do the action of impulse electricity with opening circuit by the conducting of SW1, make current potential V1 produce the variation of electronegative potential (LOW) and high potential (HIGH), and obtain pulse signal, as the required triggering signal of control signal generator 12.

Control signal generator 12, it constitutes with a D type flip-flop (D FLIP-FLOP) or equivalent electric circuit.The clock signal input (CP) of the one D type flip-flop U2 is connected with the output of triggering signal generator 11, oppositely data output (QN) then is connected with data input end (D), again with the output signal of forward data output (Q) control signal as connector 13.When clock pulse signal input part (CP) when receiving pulse signal, just the current potential with data input end (D) moves on to forward data output (Q), form the reverse potential of original data input end (D) simultaneously at reverse data output (QN), oppositely the current potential of data output (QN) is then sent data input end (D) again back to.When clock signal input (CP) receives next time pulse signal by the time, the one D type flip-flop U2 just can repeat above-mentioned action, so when clock pulse signal input part (CP) when continuing to receive pulse signal, just high potential (HIGH) and electronegative potential (LOW) can be sent in the mode of cycle alternation, as the control signal of connector 13.

Connector 13, it is constituted with a multiplexer or equivalent electric circuit, first group of signal input part X1 and Y1 and first (USB) interface 14 of the first multiplexer U3 are connected, second group of signal input part X2 and Y2 then are connected with second (USB) interface 15, signal output part X3 and Y3 then are connected with the 3rd (USB) interface 16, and select signal input part (SEL) to link to each other with the output of control signal generator 12, utilize control signal that control signal generator 12 sent in a looping fashion selection signal as the first multiplexer U3.When the selection signal of selecting signal input part (SEL) to be sent into is electronegative potential (LOW), the signal that first group of signal input part X1 and Y1 are sent into is sent by signal output part X3 and Y3.When the selection signal of selecting signal input part (SEL) to be sent into is high potential (HIGH), the signal that second group of signal input part X2 and Y2 are sent into is sent by signal output part X3 and Y3.That is to say, select the electronegative potential (LOW) of signal input part (SEL) can allow a USB interface 14 be connected with the 3rd USB interface 16 respectively with the 2nd USB interface 15 with high potential (HIGH).

Utilize USB interface electronic type switching device shifter of the present utility model, the USB interface of different electronic installations can be connected, utilize the mode of sequence starting switch that different USB interfaces is linked in sequence.

Please referring to Fig. 3, the circuit diagram of another preferred embodiment of the utility model, as shown in the figure, wherein control signal generator 12 is constituted with two D type flip-flops (D FLIP-FLOP) or equivalent electric circuit.The clock signal input (CP) of the one D type flip-flop U2 is connected with the output of triggering signal generator 11, oppositely data output (QN) then is connected with its data input end (D), the clock signal input (CP) of the 2nd D type flip-flop U4 is connected with the reverse data output (QN) of a D type flip-flop U2, the reverse data output (QN) of the 2nd D type flip-flop U4 then is connected with its data input end (D), again with the output signal of the forward data output (Q) of a D type flip-flop U2 and the 2nd D type flip-flop U4 control signal as connector 13.When the clock signal input (CP) of a D type flip-flop U2 when receiving pulse signal, just the current potential with its data input end (D) moves on to forward data output (Q), form the reverse potential of original data input end (D) simultaneously at reverse data output (QN), oppositely the current potential of data output (QN) is then sent data input end (D) back to, when next pulse signal is sent into control signal generator 12, the current potential of data input end (D) just moves on to the forward data output (Q) of a D type flip-flop U2, current potential when the current potential of forward data output this moment (Q) is sent into control signal generator 12 with preceding pulsatile once signal is opposite, so does the conversion of high potential (HIGH) and electronegative potential (LOW) in the mode of circulation.The triggering signal that the 2nd D type flip-flop U4 is then sent into as its clock pulse signal input part (CP) with the current potential of the forward data output (Q) of a D type flip-flop U2, therefore the forward data output (Q) of the 2nd D type flip-flop U4 also is the conversion of doing high potential (HIGH) and electronegative potential (LOW) in the mode of circulation, and the frequency of its conversion is a D type flip-flop U2 half.So the forward data output (Q) at a D type flip-flop U2 and the 2nd D type flip-flop U4 just obtains electronegative potential (LOW) electronegative potential (LOW), high potential (HIGH) electronegative potential (LOW), electronegative potential (LOW) high potential (HIGH) and four kinds of control signals of sending in a looping fashion of high potential (HIGH) high potential (HIGH), connector 13 is connected different USB interfaces.

Please referring to Fig. 4, the circuit diagram of the another preferred embodiment of the utility model, be that with the difference of the foregoing USB interface of this paper electronic type switching device shifter the internal resistance between the USB interface is different, utilize mode in parallel that the first multiplexer U3 in the connector 13 is in parallel with the second multiplexer U3 ', make the internal resistance between the USB interface diminish, signal transmission quality between the USB interface is promoted, prolong the distance between the USB interface.

Please referring to Fig. 5, Fig. 6, the circuit box schematic diagram and the circuit diagram of the preferred embodiment of the utility model additional delay signal generator 17, as shown in the figure, delay signal generator 17 is made up of a resistor, a capacitor and a diode (see figure 6), its input links to each other with the output of triggering signal generator 11, and output then is connected with the activation end (OE) of connector 13.Second resistor R 2 and the second capacitor C2 are serially connected between power supply (VCC) and the ground (GND), one end of second resistor R 2 is connected with power supply (VCC), the other end then is connected with the end of the second capacitor C2, current potential is V2, the other end of the second capacitor C2 then is connected to ground (GND), the positive pole of the first diode D1 is connected to current potential V2, negative pole then is connected with an end of the 3rd resistor R 3, the other end of the 3rd resistor R 3 then is the input of delay signal generator 17, and current potential V2 then is the output of delay signal generator 17.

When the diverter switch SW1 of triggering signal generator 11 conducting, current potential V1 changes into electronegative potential (LOW) by high potential (HIGH), and current potential V2 also changes into electronegative potential (LOW) by high potential (HIGH), when not conducting of diverter switch SW1, current potential V1 changes into high potential (HIGH) by electronegative potential (LOW), and current potential V2 also changes into high potential (HIGH) by electronegative potential (LOW), change into the time of high potential (HIGH) by electronegative potential (LOW) for retarded potential V2, the capacitor that the utility model choice reaction time is grown is as the second capacitor C2, when the diverter switch SW1 of triggering signal generator 11 conducting, the activation end (OE) of connector 13 becomes electronegative potential, therefore the connection between the USB interface all is cut off, after a period of time, current potential V2 changes into high potential (HIGH) by electronegative potential (LOW), and the control signal of being sent according to the control signal generator 12 USB interface of will being correlated with connects again.The design person of being to use of the present utility model will work diverter switch in proper order move, the annexation that just can choose required USB interface is (as selecting device No. 1 by a shift knob, select device No. 2 by twice shift knob), but if make change action for several times at short notice, because the electronic installation reaction is faster, the USB interface of incoherent centre is therefore conducting but, be easy to cause the signal confusion of whole system and work as machine, delay signal generator 17 then can make the electronic type switching device shifter of USB interface of the present utility model in switching the way, because the delay of current potential V2 is saturated, so the USB interface of middle of short duration connection is unaffected, avoids producing signal misdelivery and work as machine.

Please referring to Fig. 7, Fig. 8, the circuit box schematic diagram and the circuit diagram of the preferred embodiment of the utility model additional display 18, as shown in the figure, the input of display 18 links to each other with the output of control signal generator 12, the unlike signal that utilizes control signal generator 12 to be exported, make first light-emitting diode (LED1), second light-emitting diode (LED2) conducting respectively, to show the annexation between the present USB interface.

Please referring to Fig. 9, Figure 10, the circuit box schematic diagram and the circuit diagram of the preferred embodiment of the additional initial signal generator 19 of the utility model, as shown in the figure, the output of initial signal generator 19 is connected with the input of control signal generator 12, it is made up of a resistor and a capacitor, wherein the 4th resistor R 4 and the 4th capacitor C4 are serially connected between power supply (VCC) and the ground (GND), the 4th resistor R 4 one ends are connected to ground (GND), the other end then is connected with the 4th capacitor C4 one end, current potential is V3, the other end of the 4th capacitor C4 then is connected with power supply (VCC), when power supply (VCC) is connected, V3 changes into high potential (HIGH) by electronegative potential (LOW) at once, send into the replacement end (R) of the D type flip-flop U2 in the control signal generator 12, the output valve cleaning of the one D type flip-flop U2 is electronegative potential (LOW), after after a while, because the 4th capacitor C4 charging, make V3 change into electronegative potential (LOW) by high potential (HIGH), and maintain electronegative potential (LOW), no longer influence connector 13, when so making each energized, the annexation of USB interface all is identical.

And therefore the power supply (VCC) that the utility model is connect with each electronic installation USB interface itself does not need to add in addition power supply as high potential (HIGH).Simultaneously can locate to be connected in series a diode, enter USB power supply that interface is connect (VCC) to avoid electric current to pour in down a chimney at the power supply (VCC) of (USB) interface.

The above only is preferred embodiment of the present utility model, and not limiting the pulse signal that triggering signal generator 11 sent is forward or negative sense, and also not limiting the control signal that control signal generator 12 sent has several groups.Secondly, the number of display, multiplexer and USB interface and unrestricted.Therefore all equalizations of doing according to spirit of the present utility model change and modify, and all belong to the utility model claim.

Claims

1. the electronic type switching device shifter of a universal serial bus (USB) interface comprises triggering signal generator, control signal generator, connector, it is characterized in that:

The triggering signal generator, its output links to each other with the input of control signal generator, and tool one switching switch, when the user starts diverter switch, just sends a triggering signal to the control signal generator;

The control signal generator, its input is connected with the output of triggering signal generator, and output then is connected with the input of connector, and it receives the triggering signal that the triggering signal generator is sent, and after treatment, sends and controls signal to connector;

Connector, its input links to each other with electronic installation universal serial bus (USB) interface more than two, output then links to each other with universal serial bus (USB) interface of another electronic installation, after it receives the control signal that the control signal generator sent, according to universal serial bus (USB) interface of control signal join dependency.

2. the electronic type switching device shifter of universal serial bus according to claim 1 (USB) interface, it is characterized in that, said triggering signal generator switches switches set with a resistor, a capacitor and and becomes, resistor and capacitor series are between power supply and ground, one end of diverter switch is connected to ground, the other end then is connected to the end that resistor is connected with capacitor, utilizes the diverter switch conducting whether to produce pulse signal.

3. the electronic type switching device shifter of universal serial bus according to claim 1 (USB) interface, it is characterized in that, said control-signals generator constitutes with a D type flip-flop (D FLIP-FLOP), its clock pulse signal input part (CP) is the input of control signal generator, oppositely data output (QN) then is connected with data input end (D), and forward data output (Q) then is an output.

4. the electronic type switching device shifter of universal serial bus according to claim 1 (USB) interface, it is characterized in that, said connector constitutes with a multiplexer, the signal input part of multiplexer and output are connected with different electronic installation universal serial bus (USB) interface respectively, and select signal input part (SEL) to be connected with the output of control signal generator with it.

5. the electronic type switching device shifter of universal serial bus according to claim 1 (USB) interface, it is characterized in that, said control signal generator constitutes with at least two D type flip-flops (D FLIP-FLOP), the clock signal input (CP) of first D type flip-flop is connected with the output of triggering signal generator, oppositely data output (QN) then is connected with its data input end (D), the clock signal input (CP) of second D type flip-flop is connected with the reverse data output (QN) of first D type flip-flop, the reverse data output (QN) of second D type flip-flop then is connected with its data input end (D), the rest may be inferred by analogy, again with the output signal of the forward data output (Q) of each the D type flip-flop control signal as connector.(Q) output signal is as the control signal of connector.

6. the electronic type switching device shifter of universal serial bus according to claim 1 (USB) interface, it is characterized in that, have the identical multiplexer that connects with parallel way more than two in the said connector, make that the internal resistance between universal serial bus (USB) interface diminishes.

7. the electronic type switching device shifter of universal serial bus according to claim 1 (USB) interface, it is characterized in that, can set up a delay signal generator between said triggering signal generator and the connector, its input links to each other with the output of triggering signal generator, and output then is connected with the activation end (OE) of connector.

8. the electronic type switching device shifter of universal serial bus according to claim 7 (USB) interface, it is characterized in that, said delay signal generator is by two resistors, one capacitor and a diode are formed, its input links to each other with the output of triggering signal generator, output then is connected with the activation end (OE) of connector, resistor and capacitor series are between power supply (VCC) and ground (GND), the positive pole of diode is connected to the tie point of resistor and capacitor, output for delay signal generator, the negative pole of diode then is connected in series mutually with another resistor, is the input of delay signal generator.

9. the electronic type switching device shifter of universal serial bus according to claim 1 (USB) interface is characterized in that said control signal generator can connect a display, to show the annexation between present universal serial bus (USB) interface.

10. the electronic type switching device shifter of universal serial bus according to claim 9 (USB) interface is characterized in that said display is formed with light-emitting diode.

11. the electronic type switching device shifter of universal serial bus according to claim 1 (USB) interface, it is characterized in that, said control signal generator can connect the beginning signal generator, when making each energized, the annexation of universal serial bus (USB) interface all is identical.

12. the electronic type switching device shifter of universal serial bus according to claim 11 (USB) interface, it is characterized in that, said initial signal generator is made up of a resistor and a capacitor, resistor and capacitor series and link to each other with the control signal generator for output with the tie point of capacitor with resistor between power supply (VCC) and ground (GND).

13. the electronic type switching device shifter of universal serial bus according to claim 1 (USB) interface is characterized in that, used power supply can use the power supply of universal serial bus (USB) interface that is connected.

14. the electronic type switching device shifter of universal serial bus according to claim 1 (USB) interface is characterized in that, the power supply of each universal serial bus (USB) interface can be connected in series a diode in case electric current pours in down a chimney.