JPH08172226A - Data exchange switch - Google Patents

Abstract

PURPOSE: To provide a small-sized data exchange switch in which power conservation can be obtained by expediting data exchange between processors and the executing performance of a multiprocessor system can be extremely improved. CONSTITUTION: This data exchange switch is formed by providing a predetermined electric terminal by using a coupler for coupling Josephson lines and resistors. A first input signal input from a first input terminal 15 and a second input signal input from a second input terminal 16 become a first output signal and a second output signal by switching the lines for advancing by a first control signal input from input terminals 13, 14 for first control signals and second control signals input from input terminals 8, 11 for second control signals and switching a first output terminal 17 and a second output terminal 18, and hence a fundamental function as the data exchange switch is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data exchange switch such as a superconducting switch mainly applied to a network between a processor and a memory in a computer system having a high computing function.

[0002]

2. Description of the Related Art Conventionally, in order to improve the performance of a computer system, it is indispensable to improve the performance of a single processor (computer). Therefore, there is a limit in realizing the performance improvement of the computer system by the processor alone. Therefore, in order to solve such a problem, a multiprocessor system has been implemented in which a plurality of independent processors are operated in parallel to improve performance.

In the case of this multiprocessor system, the multiprocessor system exhibits the highest performance when each processor has its own useful work. However, it is rare for the best performance to occur,
There are usually several causes of poor performance. The cause of the performance degradation of the multiprocessor system is, for example, a delay associated with communication between the processors and a performance limit of overhead for synchronizing one processor with another processor. The performance of a multiprocessor system depends largely on the network between the processors.

On the other hand, a data exchange switch is widely used in a circuit for performing communication between such processors. The data exchange switch has many configurations, and one example thereof is a case where a semiconductor logic element is used.

FIG. 3 shows a circuit of a conventional data exchange switch formed by using a semiconductor logic element.

This data exchange switch comprises an amplifier, a transmission request bit register 39, two AND circuits 37a, 3
7b and the OR circuit 38 are connected to the required terminals. In this data exchange switch, the transmission request signal input via the transmission request input terminal 34 is held in the transmission request bit register 39 at the rising edge of the clock input from the operation clock input terminal 36.

When the transmission request signal is 0, that is, when the data transmission is not requested, the data signal input through the data input terminal 33 is output through the data output terminal 31. Further, when the transmission request signal is 1, that is, when data transmission is requested, the transmission data signal input through the transmission data input terminal 32 is output through the data output terminal 31.

That is, the data exchange switch can exchange and output the data signal and the transmission data signal according to the transmission request.

[0009]

In the case of the above-mentioned data exchange switch, there is a limit to the reduction of power consumption because it has a configuration using semiconductor logic elements. Generally, the data exchange switch is expected to operate at high speed, and it is difficult to reduce power consumption also from this point.

Further, since the data exchange switch is a basic circuit, when a plurality of exchanges are used between processors in a multiprocessor system or the like, a considerable number is required as a whole. However, due to the above-mentioned problem of power consumption, it is difficult to densely package an exchange composed of a plurality of data exchange switches, and there is a problem that the required exchange as a whole cannot be made compact. Therefore, in a multiprocessor system that requires complicated data exchange, the media delay becomes a bottleneck, and it is difficult to improve the performance of the entire system.

The present invention has been made in order to solve such a problem, and its technical problem is that data exchange between processors can be speeded up to save power and execution performance of a multiprocessor system. (EN) Provided is a small data exchange switch capable of significantly improving

[0012]

According to the present invention, a combination of a Josephson line formed by forming a tunnel barrier between an upper electrode and a lower electrode and a resistor is electrically connected to each other. In addition, a data exchange switch can be obtained in which electric terminals for use are provided at predetermined positions of both ends and the connecting portion of the combined body.

Further, according to the present invention, in the above data exchange switch, a part of the combined body has one end connected to the first input terminal and the other end connected to the first output terminal. And has a Josephson line connected to a second control signal input terminal for inputting a second control signal, and the other part of the combined body has a second input terminal at one end. A second control signal input terminal different from the second control signal input terminal for inputting the second control signal, while being connected to the second output terminal at the other end. With connected Josephson lines, the remainder of the combination being partly second
Connected to the output terminal of the first control signal and having a Josephson line connected to the first control signal input terminal for inputting the first control signal; And a Josephson line connected to the first control signal input terminal different from the first control signal input terminal for inputting the first control signal. A switch for exchanging data, which includes

Further, according to the present invention, in the data exchange switch, part and other parts of the combination are
A data exchange switch including a bias current input terminal as a required electrical terminal is obtained.

[0015]

In general, in order to perform communication between processors at high speed and efficiently, it is effective to physically bring communication parts for data exchange close to each other, but it is difficult to bring many processors physically close to each other. Very difficult. Therefore, only the interface is extracted and brought close to the bus, and the ultra-wideband bus is connected in a ring to form a high speed interface circuit. By using this high-speed interface circuit, the communication speed between the processors is made higher than the operating speed of the processors. If a superconducting line is used for the ultra-wide band here, a signal line without distortion can be realized.

In the data exchange switch of the present invention, since the Josephson line is used as the superconducting line, data exchange can be performed without deteriorating the characteristic of the distortion-free ultra-wideband signal line. Since Frankson (a magnetic vortex accelerated by the Josephson tunnel current) propagating in the Josephson line is a pulse in a very high band, a data exchange switch capable of performing data exchange at high speed is realized.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A data exchange switch according to the present invention will be described in detail below with reference to the accompanying drawings.

First, the basic structure of the data exchange switch of the present invention will be briefly described. This data exchange switch is formed by electrically connecting to each other a coupling body in which a Josephson line formed by forming a tunnel barrier between an upper electrode and a lower electrode and a resistor are electrically connected to each other. Also, electrical terminals are provided at predetermined positions of the coupling portion.

In such a basic structure, in order to exchange data, the electrical terminal has a specific role.

FIG. 1 shows the basic structure of a data exchange switch according to an embodiment of the present invention.

In this data exchange switch, the first input terminal 15 is connected to one end and the first output terminal 17 is connected to the other end of a part of the combined body, and the second control unit is connected. It has a Josephson line 2 connected to a second control signal input terminal 8 for inputting a signal.
In addition to the Josephson line 1,
2, resistors 19, 20, 21 and bias current input terminals 7, 9 are included.

In the other part of the combined body, the second input terminal 16 is connected to one end and the second output terminal 1 is connected to the other end.
8 has a Josephson line 5 connected to it and a second control signal input terminal 11 for inputting a second control signal. In addition to this part, the Josephson lines 4 and 6 and the resistors 22, 23 and 24
And bias current input terminals 10 and 12 are included.

Further, the remaining part of the combined body is for connecting the one part to the second output terminal 18 of the other part and for the first control signal for inputting the first control signal. One having a Josephson line 29 connected to the input terminal 13 (in addition, the resistors 25 and 28 are included),
A first part for connecting the other part to the first output terminal 17 of the part and for inputting the first control signal.
And those having a Josephson line 30 connected to the control signal input terminal 14 (including resistors 26 and 27 in addition).

In the case of this data exchange switch, with respect to only the Josephson line 30, both the upper electrode and the lower electrode are grounded, and the other Josephson lines 1, 2 ,.
The lower electrodes of 3, 4, 5, 6, and 29 are grounded.

The operation of the data exchange switch will be described below.

First, the first input signal input from the first input terminal 15 is transmitted through the resistor 19 to the Josephson line 1
And a bias current is supplied from the bias current input terminal 7, the Frankson generated by the first input signal propagates to the Josephson line 1 biased by the bias current. Frankson is branched by the resistors 20 and 25 at the end of the Josephson line 1 and supplied to the Josephson lines 2 and 29 as an input current.

Here, when the first control signal is input from the first control signal input terminal 13 and the second control signal is not input from the second control signal input terminal 8, Joseph is input. A new Frankson is generated in the Son line 29, but a new Frankson is not generated in the Josephson line 2 because the second control signal is not applied as a bias. The Frankson generated on the Josephson line 29 is propagated to the Josephson line 6 via the resistor 28, and the newly generated Frankson is output as a second output signal from the second output terminal 18 on the Josephson line 6. To be done. As a result, the first input signal input from the first input terminal 15 is propagated to the second output terminal 18 according to the first control signal.

Further, here, when the second control signal is input to the second control signal input terminal 8 and the first control signal is not input from the first control signal input terminal 13. , A new Frankson is generated in the Josephson line 2, but no new Frankson is generated in the Josephson line 29 because the first control signal is not applied as a bias to the Josephson line 29. The Frankson generated in the Josephson line 2 is propagated to the Josephson line 3 via the resistor 21, and the newly generated Frankson is output as the first output signal from the first output terminal 17 in the Josephson line 3. To be done. As a result, the first input signal input from the first input terminal 15 is propagated to the first output terminal 17 according to the second control signal.

On the other hand, the second input signal input from the second input terminal 16 is applied to the Josephson line 4 via the resistor 22, and the bias current is supplied from the bias current input terminal 10. Then, the Frankson generated by the second input signal propagates to the Josephson line 4 biased by the bias current. Frankson is branched by resistors 23 and 27 at the end of the Josephson line 4 and supplied as an input current to the Josephson lines 5 and 30.

Here, when the first control signal is input from the first control signal input terminal 14 and the second control signal is not input from the second control signal input terminal 11, Joseph is input. A new Frankson is generated in the Son line 30, but a new Frankson is not generated in the Josephson line 5 because the second control signal is not applied as a bias. The Frankson generated in the Josephson line 30 is propagated to the Josephson line 3 via the resistor 26, and the newly generated Frankson is output as a first output signal from the first output terminal 17 in the Josephson line 3. To be done. As a result, the second input signal input from the second input terminal 16 becomes the first input signal in accordance with the first control signal.
Will be propagated to the output terminal 17 of.

Further, here, the second control signal input terminal 11
When the second control signal is input and the first control signal is not input from the first control signal input terminal 14, a new Frankson is generated in the Josephson line 5, Since the first control signal is not applied as a bias to the Josephson line 30, no new Frankson is generated. Frankson generated on the Josephson line 5 is transmitted through the resistor 24 to the Josephson line 6
And the newly generated Frankson on the Josephson line 6 is output from the second output terminal 18 as a second output signal. As a result, the second input signal input from the second input terminal 16 is propagated to the second output terminal 18 according to the second control signal.

As described above, the first input signal input from the first input terminal 15 and the second input signal input from the second input terminal 16 are the first control signal and the second control signal. Thus, the first output terminal 17 and the second output terminal 18 are exchanged, and a basic function as a data exchange switch can be obtained.

The voltage is generated in the data exchange switch of this embodiment only at the moment when the Frankson is generated in each Josephson line and when the pulse signal flows through the corresponding resistor. Therefore, the power consumed is very small, on the order of nW, and the Frankson pulse width is a few p.
Since s is very steep, it is possible to propagate a high-speed pulse. As a result, the data exchange switch can exchange data at high speed and low power.

FIG. 2 shows the basic structure of a data exchange switch according to another embodiment of the present invention.

In this data exchange switch, the first input terminal 115 is connected to one end and the first output terminal 117 is connected to the other end of a part of the combined body, and the second control unit is connected. It has a Josephson line 102 connected to a second control signal input terminal 108 for inputting a signal. In addition to the resistor 11
9,120,121 are included.

In the other part of the combined body, the second input terminal 116 is connected to one end, the second output terminal 118 is connected to the other end, and the second control signal is input. Has a Josephson line 105 connected to the second control signal input terminal 111. Resistors 122, 123, and 124 are included in the other part of the combined body.

Further, the remaining part of the combined body is connected to the second output terminal 118 of the other part for a part of the other part, and for the first control signal for inputting the first control signal. Josephson line 12 connected to input terminal 113
9 (including resistors 125 and 128 in addition) and another part for connecting the other part to the first output terminal 117 in part and for inputting the first control signal. One having a Josephson line 130 connected to one control signal input terminal 114 (in addition, resistors 126 and 127 are included).

In the case of this data exchange switch, with respect to only the Josephson line 130, both the upper electrode and the lower electrode are grounded and the other Josephson line 102,
The lower electrodes of 105 and 129 are grounded.
In the case of this data exchange switch, compared with the one in the previous embodiment, a single Josephson line in part and other parts of the coupling body is configured and a bias current input terminal is not provided. Are different.

The operation of this data exchange switch will be described below.

First, from the first input terminal 115 to the resistor 11
The first input signal input via 9 is the resistor 120,
It is branched to 125 and supplied to the Josephson lines 102 and 129 as an input current.

Here, when the first control signal is input from the first control signal input terminal 113 and the second control signal is not input from the second control signal input terminal 108, the Joseph A new Frankson is generated on the Sonson track 129, but a second Frankson is generated on the Josephson track 102.
Since the control signal of is not applied as the bias, new Frankson does not occur. Josephson Railroad 129
Is generated as a second output signal from the second output terminal 118 via the resistor 128.
As a result, the first input from the first input terminal 115
Input signal of the second output terminal 1 according to the first control signal
18 will be propagated.

Further, here, the second control signal input terminal 10 is used.
When the second control signal is input from the control circuit 8 and the first control signal is not input from the first control signal input terminal 113, a new Frankson is generated in the Josephson line 102. No new Frankson is generated because the first control signal is not applied as a bias to the Josephson line 129. Josephson Railroad 1
The Frankson generated in 02 is output as a first output signal from the first output terminal 117 via the resistor 121. As a result, the first input signal input from the first input terminal 115 is propagated to the first output terminal 117 according to the second control signal.

On the other hand, from the second input terminal 116 to the resistor 1
The second input signal input via 22 is the resistor 12
Branched to 3,127, Josephson line 105,13
9 is supplied as an input current.

Here, when the first control signal is input from the first control signal input terminal 114 and the second control signal is not input from the second control signal input terminal 111, the Joseph A new Frankson is generated in the Son line 130, but no new Frankson is generated in the Josephson line 105 because the control signal is not applied as a bias to the Josephson line 105. The Frankson generated on the Josephson line 130 is output as a first output signal from the first output terminal 117 via the resistor 126. As a result, the second input signal input from the second input terminal 116 is propagated to the first output terminal 117 according to the first control signal.

Further, here, the second control signal input terminal 11
If the first control signal is not input from the first control signal input terminal 114 while the first control signal is input from the first control signal 1 from the first control signal, a new Frankson is generated in the Josephson line 105. No new Frankson is generated because the first control signal is not applied as a bias to the Son line 130. The Frankson generated on the Josephson line 105 is output as a second output signal from the second output terminal 118 via the resistor 124. As a result, the second input signal input from the second input terminal 116 is transmitted to the second output terminal 11 according to the second control signal.
8 will be propagated.

As described above, the first input signal input from the first input terminal 115 and the second input signal input from the second input terminal 116 are the first control signal and the second control signal. The first output terminal 117 and the second output terminal 11
8 is exchanged, and a basic function as a data exchange switch is obtained.

In the data exchange switch of this embodiment, the voltage is generated only at the moment when the Frankson is generated in each Josephson line and when the pulse signal flows through the corresponding resistor. Therefore, similar to the previous embodiment, this data exchange switch can exchange data at high speed and low power.

[0048]

As described above, according to the present invention, the data exchange switch is constructed by providing the necessary electrical terminals by using the combination body of the Josephson line and the resistor body. , No gate circuit is needed at all, and it becomes very simple and compact. In addition, in the case of this data exchange switch, the voltage is generated only at the moment when the Frankson is generated in each Josephson line and when the pulse signal flows through the corresponding resistor, and the Frankson pulse width is very steep. Therefore, data exchange can be performed at high speed and with low power consumption. As a result, a data exchange switch capable of speeding up data exchange between processors to save power and significantly improving execution performance of a multiprocessor system is realized.

[Brief description of drawings]

FIG. 1 shows a basic configuration of a data exchange switch according to an embodiment of the present invention.

FIG. 2 shows a basic configuration of a data exchange switch according to another embodiment of the present invention.

FIG. 3 shows a circuit configuration of a conventional data exchange switch configured by using a semiconductor logic element.

[Explanation of Codes] 1 to 6, 29, 30, 102, 105, 129, 130
Josephson line 7, 9, 10, 12 Bias current input terminal 8, 11, 13, 14, 108, 111, 113, 11
4 Control signal input terminal 15, 16, 115, 116 Input terminal 17, 18, 117, 118 Output terminal 19-28, 119-128 Resistor 31 Data output terminal 32 Transmission data input terminal 33 Data input terminal 34 Transmission request input Terminal 36 Operation clock input terminals 37a, 37b Logical product circuit 38 Logical sum circuit 39 Transmission request bit register

Claims (3)

[Claims] 1. A combination of a Josephson line formed by forming a tunnel barrier between an upper electrode and a lower electrode and a resistor is electrically connected to each other, and both ends of the combination and A data exchange switch, characterized in that a predetermined electric terminal is provided at a predetermined portion of the coupling portion. 2. The data exchange switch according to claim 1, wherein a part of the combined body has a first input terminal connected to one end and a first output terminal connected to the other end. At the same time, it has a Josephson line connected to a second control signal input terminal for inputting a second control signal, and the other part of the combined body has a second input terminal at one end. A second control signal input terminal which is connected to the other end of the second control signal and which is different from the second control signal input terminal for inputting the second control signal. A Josephson line connected to the other part of the coupling body, the remaining part of the coupling body connects the one part to the second output terminal of the other part, and outputs the first control signal. The jog connected to the first control signal input terminal for input A first control signal input terminal for inputting the first control signal while having a Sefson line and connecting the other part to the first output terminal of the part And a switch having a Josephson line connected to a first control signal input terminal, which is different from the switch for data exchange. 3. The data exchange switch according to claim 2, wherein the part and the other part of the combined body include a bias current input terminal as the required electric terminal. Switch for data exchange.