CN112350704A - Single-pole double-throw switch - Google Patents
Single-pole double-throw switch Download PDFInfo
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- CN112350704A CN112350704A CN202011181433.3A CN202011181433A CN112350704A CN 112350704 A CN112350704 A CN 112350704A CN 202011181433 A CN202011181433 A CN 202011181433A CN 112350704 A CN112350704 A CN 112350704A
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- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/90—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of galvano-magnetic devices, e.g. Hall-effect devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/32—Non-reciprocal transmission devices
- H01P1/38—Circulators
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Abstract
The invention discloses a single-pole double-throw switch, comprising: an off-chip magnetic field generating unit configured to provide a magnetic field to the circulator, the magnetic field including a first magnetic field and a second magnetic field, the first magnetic field being opposite to the second magnetic field, the first magnetic field and the second magnetic field alternately occurring periodically or non-periodically; the circulator is arranged to transmit signals in a first circulating direction under the action of the first magnetic field and transmit signals in a second circulating direction opposite to the first circulating direction under the action of the second magnetic field; the circulator is at least provided with a first port, a second port and a third port, and the first port, the second port and the third port are sequentially arranged along a first circulating direction; the first port is used as a fixed end of the single-pole double-throw switch, and the second port is used as a first movable end of the single-pole double-throw switch; the third port is used as a second movable end of the single-pole double-throw switch.
Description
Technical Field
The disclosure relates to the technical field of quantum computing, in particular to a single-pole double-throw switch.
Background
Current switches can be broadly divided into two categories: the contact switch realizes the switch function by changing the connection of the inner conductor and the outer conductor from one end to the other end; non-contact switches, such as "capacitively coupled" switches, switch from capacitive coupling at one end to capacitive coupling at the other. The switching of the contact switch depends on the contact of the metal conductor surface, the performance of the switch is directly influenced by the contact, loss and heating are caused by the contact resistance, and the reliability is often greatly reduced because a large mechanical force is needed during switching. The disadvantage of contact is overcome by the "capacitive coupling" type of non-contact switch, which still requires a large mechanical force for switching, and the above-mentioned problems are also present, which have in common that a relatively long (in the order of seconds) switching time is required. These inherent disadvantages make it difficult to achieve the reliability requirements and switching time requirements of particularly high reliability requirements and short switching times for superconducting quantum computing test systems employing the above-described contact-type or non-contact, e.g., "capacitively coupled," switches.
Disclosure of Invention
The disclosed embodiment provides a single-pole double-throw switch, including:
a circulator and an off-chip magnetic field generating unit;
the off-chip magnetic field generating unit is arranged to provide a magnetic field for the circulator, wherein the magnetic field comprises a first magnetic field and a second magnetic field, the first magnetic field is opposite to the second magnetic field, and the first magnetic field and the second magnetic field alternately appear periodically or non-periodically;
the circulator is arranged to transmit signals in a first circulating direction under the action of the first magnetic field and transmit signals in a second circulating direction opposite to the first circulating direction under the action of the second magnetic field; the circulator is at least provided with a first port, a second port and a third port, and the first port, the second port and the third port are sequentially arranged along a first circulating direction;
the first port is used as a fixed end of the single-pole double-throw switch, and the second port is used as a first movable end of the single-pole double-throw switch; the third port is used as a second movable end of the single-pole double-throw switch.
In an exemplary embodiment, the switch further has the following features:
the circulator is an on-chip microwave circulator.
In an exemplary embodiment, the switch further has the following features:
the off-chip magnetic field generating unit comprises a set of off-chip bias circuits.
In an exemplary embodiment, the switch further has the following features:
the first circulating direction is the direction in which signals are input from the first port and output from the second port; or,
the first circulating direction is a direction in which a signal is input from the first port and output from the third port.
In an exemplary embodiment, the switch further has the following features:
the circulator has a first port, a second port, a third port, and a fourth port;
the first port, the second port, the third port and the fourth port are sequentially arranged along a first annular direction;
and the third port is connected with a resistor with the resistance value of a preset value.
In an exemplary embodiment, the switch further has the following features:
the preset value is 50 ohms.
In an exemplary embodiment, the switch further has the following features:
the on-chip microwave circulator is a three-port on-chip microwave circulator.
In an exemplary embodiment, the switch further has the following features:
the on-chip microwave circulator is a four-port on-chip microwave circulator.
The single-pole double-throw switch comprises a circulator and an off-chip magnetic field generating unit, and the off-chip magnetic field generating unit generates alternating magnetic fields so as to change the circulating direction of the circulator, so that signals are input from the same port and output from different ports, and the function of the single-pole double-throw switch is realized.
Drawings
Fig. 1 is a schematic diagram of a single pole, double throw switch according to an embodiment of the disclosure.
Fig. 2 is a schematic diagram of a single pole, double throw switch formed from a three port circulator according to an embodiment of the disclosure.
Fig. 3 is a schematic diagram of a single pole, double throw switch constructed from a four port circulator according to an embodiment of the disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
Fig. 1 is a schematic diagram of a single-pole double-throw switch according to an embodiment of the disclosure, as shown in fig. 1, the single-pole double-throw switch according to the embodiment includes a circulator and an off-chip magnetic field generating unit;
the off-chip magnetic field generating unit is arranged to provide a magnetic field for the circulator, wherein the magnetic field comprises a first magnetic field and a second magnetic field, the first magnetic field is opposite to the second magnetic field, and the first magnetic field and the second magnetic field alternately appear periodically or non-periodically;
the circulator is arranged to transmit signals in a first circulating direction under the action of the first magnetic field and transmit signals in a second circulating direction opposite to the first circulating direction under the action of the second magnetic field; the circulator is at least provided with a first port, a second port and a third port, and the first port, the second port and the third port are sequentially arranged along a first circulating direction;
the first port is used as a fixed end of the single-pole double-throw switch, and the second port is used as a first movable end of the single-pole double-throw switch; the third port is used as a second movable end of the single-pole double-throw switch.
The single-pole double-throw switch comprises a circulator and an off-chip magnetic field generating unit, and the off-chip magnetic field generating unit generates alternating magnetic fields so as to change the circulating direction of the circulator, so that signals are input from the same port and output from different ports, and the function of the single-pole double-throw switch is realized.
In an exemplary embodiment, the switch further has the following features:
the circulator may be an on-chip microwave circulator. An on-chip microwave circulator (on-chip microwave circulator) is a circulator that can be integrated with a superconducting circuit. The single-pole double-throw switch comprising the on-chip microwave circulator is small in size, high in reliability and short in switching time, and plays a role in isolating a signal source from a receiving end. In other embodiments, the circulator may be other types of circulators, and is not limited to an on-chip microwave circulator.
In an exemplary embodiment, the switch further has the following features:
the off-chip magnetic field generating unit may include a set of off-chip bias circuits, which may also be referred to as a set of off-chip bias lines. The set of off-chip bias circuits may include a dc current source or a dc voltage source, and a magnetic field exists around the energized conductor according to the oersted principle, so that the current in the set of off-chip bias circuits generates a magnetic field, and the generated magnetic field is changed when the direction of the current is changed.
In other embodiments, the magnetic field may be generated in other ways.
The direction of the magnetic field of the external bias line is changed by the overturning of the external bias line (namely the off-chip bias circuit), the circulating direction of the circulator becomes opposite, and the repeated overturning of the external bias magnetic field controls the opening and closing of the input signal, thereby realizing the switching function.
The dc current source or dc voltage source is arranged to generate the magnetic field. When the direction of the direct current source or the direct current voltage source is changed, the direction of the magnetic field generated by the direct current source or the direct current voltage source is changed.
In an exemplary embodiment, the switch further has the following features:
the first circulating direction may be a direction in which a signal is input from the first port and output from the second port; or,
the first circulating direction may be a direction in which a signal is input from the first port and output from the third port.
In an exemplary embodiment, the switch further has the following features:
the circulator may have a first port, a second port, a third port, and a fourth port; the first port, the second port, the third port and the fourth port are sequentially arranged along a first annular direction; and the third port is connected with a resistor with the resistance value of a preset value.
When the circulator has 4 ports, the third port is typically connected to a resistor, so that small signals passing from the second port to the third port are prevented from passing to the fourth port or small signals passing from the fourth port to the third port are prevented from passing to the second port, and a matching load of the third port is provided to absorb these small signals.
In an exemplary embodiment, the switch further has the following features:
the preset value may be 50 ohms. In other embodiments, the user can set the preset value according to the actual situation.
In an exemplary embodiment, the switch further has the following features:
the on-chip microwave circulator may be a three-port on-chip microwave circulator. At this time, the circulator has 3 ports.
In an exemplary embodiment, the switch further has the following features:
the on-chip microwave circulator may be a four-port on-chip microwave circulator. The circulator now has 4 ports.
Fig. 2 is a schematic diagram of a single pole, double throw switch formed from a three port circulator according to an embodiment of the disclosure. As shown in fig. 2, the single pole double throw switch includes a three-port circulator and an off-chip magnetic field generating unit including a current source.
Ideally, in the first circulating direction, after the signal is transmitted from the first port to the second port of the circulator, the signal is output from the second port and is no longer transmitted from the second port to the third port. Ideally, the signal from the first port is completely transmitted into the second port, and is completely outputted from the second port to the next device. Similarly, when the current direction of the bias line (i.e., the off-chip bias circuit) is changed, the magnetic field generated by the bias line changes, and the circulating direction is in the opposite direction, i.e., the second circulating direction, after the signal passes from the first port to the third port of the circulator, the signal is output to the next device from the third port and does not pass from the third port to the second port.
The first circulating direction here may also be a direction from the first port to the third port of the circulator, and the second circulating direction is a direction from the first port to the second port of the circulator.
The three-port circulator may be a three-port on-chip microwave circulator.
The embodiment of the disclosure realizes the function of a single-pole double-throw switch through a three-port circulator and an off-chip magnetic field generating unit. When the three-port circulator is a three-port on-chip microwave circulator, integration with a superconducting circuit can be realized. And the single-pole double-throw switch realized by the three-port circulator and the off-chip magnetic field generating unit has small volume, high reliability and short switching time, and plays a role in isolating a signal source and a receiving end.
Fig. 3 is a schematic diagram of a single pole, double throw switch constructed from a four port circulator according to an embodiment of the disclosure. As shown in fig. 3, the single pole double throw switch includes a four port circulator and an off-chip magnetic field generating unit including a current source.
In practical cases, in the first circulating direction, after the signal is transmitted from the first port to the second port of the circulator, the signal is output from the second port and is no longer transmitted from the second port to the third port. Ideally, the signal from the first port is completely transmitted into the second port, and is completely outputted from the second port to the next device. However, in practical situations, a small amount of signals are transmitted from the second port to the third port, and in order to prevent the signals from the third port from being transmitted to the fourth port again, the third port is 50 Ω matched with the load, and at this time, the small amount of signals transmitted from the second port are absorbed by the 50 Ω load of the third port, and the fourth port is not affected. Similarly, when the current direction of the bias line is changed, the magnetic field generated by the bias line changes, and the circulating direction is in the opposite direction, that is, the second circulating direction, and after the signal passes from the first port to the fourth port of the circulator, the signal is output to the next device through the fourth port. However, in practical situations, a small amount of signals are transmitted from the fourth port to the third port, and in order to prevent the signals from the third port from being transmitted to the second port again, the third port is 50 Ω matched with the load, and at this time, a small amount of signals transmitted from the fourth port are absorbed by the 50 Ω load of the third port, and the second port is not affected.
The first circulating direction here may also be a direction from the first port to the fourth port of the circulator, and the second circulating direction is a direction from the first port to the second port of the circulator.
The four-port circulator can be a four-port on-chip microwave circulator.
The embodiment of the disclosure realizes the function of a single-pole double-throw switch through a four-port circulator and an off-chip magnetic field generating unit. When the four-port circulator is a microwave circulator on a four-port chip, the four-port circulator can be integrated with a superconducting circuit. In addition, the single-pole double-throw switch realized by the four-port circulator and the off-chip magnetic field generating unit has small volume, high reliability and short switching time, and plays a role in isolating a signal source from a receiving end.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing the relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in the form of hardware, and may also be implemented in the form of a software functional module. The present disclosure is not limited to any specific form of combination of hardware and software.
The foregoing is only a preferred embodiment of the present disclosure, and there are certainly many other embodiments of the present disclosure, which will become apparent to those skilled in the art from this disclosure and it is therefore intended that various changes and modifications can be made herein without departing from the spirit and scope of the disclosure as defined in the appended claims.
Claims (8)
1. A single-pole double-throw switch is characterized in that,
the method comprises the following steps: a circulator and an off-chip magnetic field generating unit;
the off-chip magnetic field generating unit is arranged to provide a magnetic field for the circulator, wherein the magnetic field comprises a first magnetic field and a second magnetic field, the first magnetic field is opposite to the second magnetic field, and the first magnetic field and the second magnetic field alternately appear periodically or non-periodically;
the circulator is arranged to transmit signals in a first circulating direction under the action of the first magnetic field and transmit signals in a second circulating direction opposite to the first circulating direction under the action of the second magnetic field; the circulator is at least provided with a first port, a second port and a third port, and the first port, the second port and the third port are sequentially arranged along a first circulating direction;
the first port is used as a fixed end of the single-pole double-throw switch, and the second port is used as a first movable end of the single-pole double-throw switch; the third port is used as a second movable end of the single-pole double-throw switch.
2. The switch of claim 1, comprising:
the circulator is an on-chip microwave circulator.
3. The switch of claim 1, comprising:
the off-chip magnetic field generating unit comprises a set of off-chip bias circuits.
4. The switch of claim 1, comprising:
the first circulating direction is the direction in which signals are input from the first port and output from the second port; or,
the first circulating direction is a direction in which a signal is input from the first port and output from the third port.
5. The switch of claim 1, comprising:
the circulator has a first port, a second port, a third port, and a fourth port;
the first port, the second port, the third port and the fourth port are sequentially arranged along a first annular direction;
and the third port is connected with a resistor with the resistance value of a preset value.
6. The switch of claim 5, comprising:
the preset value is 50 ohms.
7. The switch of claim 2, comprising:
the on-chip microwave circulator is a three-port on-chip microwave circulator.
8. The switch of claim 2, comprising:
the on-chip microwave circulator is a four-port on-chip microwave circulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011181433.3A CN112350704A (en) | 2020-10-29 | 2020-10-29 | Single-pole double-throw switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011181433.3A CN112350704A (en) | 2020-10-29 | 2020-10-29 | Single-pole double-throw switch |
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| CN112350704A true CN112350704A (en) | 2021-02-09 |
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| CN202011181433.3A Pending CN112350704A (en) | 2020-10-29 | 2020-10-29 | Single-pole double-throw switch |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3935548A (en) * | 1974-06-04 | 1976-01-27 | The Washington University | Wide-band microwave circulator |
| EP0117879A1 (en) * | 1983-03-02 | 1984-09-12 | ANT Nachrichtentechnik GmbH | Switchable fourport network |
| US20140049335A1 (en) * | 2012-08-17 | 2014-02-20 | Honeywell International Inc. | Reconfigurable switching element for operation as a circulator or power divider |
-
2020
- 2020-10-29 CN CN202011181433.3A patent/CN112350704A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3935548A (en) * | 1974-06-04 | 1976-01-27 | The Washington University | Wide-band microwave circulator |
| EP0117879A1 (en) * | 1983-03-02 | 1984-09-12 | ANT Nachrichtentechnik GmbH | Switchable fourport network |
| US20140049335A1 (en) * | 2012-08-17 | 2014-02-20 | Honeywell International Inc. | Reconfigurable switching element for operation as a circulator or power divider |
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Application publication date: 20210209 |
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