A power supply filter circuit for a quantum computer

Abstract

This invention proposes a power supply filtering circuit structure for quantum computers. The power supply filtering circuit includes a power supply circuit, a switching circuit, and a filtering module. The input terminal of the power supply circuit receives the input voltage, and the output terminal supplies the input voltage to the filtering module. The switching circuit incorporates a thyristor electronic switch, which controls the conduction of the entire power supply circuit by adjusting the forward voltage between the anode and cathode of the thyristor electronic switch. The filtering module includes multi-stage filtering circuits, with each stage connected via cascade coupling. The filtering module provides filtered power to the quantum computer's power module. This invention effectively suppresses electromagnetic interference such as mains power surges, radiated spurious signals, and stray ripple signals by filtering and purifying the input signal of the previous stage through multi-stage common-mode filtering circuits, thus providing a clean and efficient power supply for the quantum computer's power module.

Description

Technical Field

[0001] This invention relates to the field of quantum computing, and more particularly to a power supply filtering circuit for quantum computers. Background Technology

[0002] Currently, existing integrated power filters struggle to pass EMC (electromagnetic compatibility) certification, particularly surge safety certification, for NMR quantum computers. Because NMR quantum computers experience significant power fluctuations, the resulting stray radiation signals are also quite strong. These adverse factors lead to unsatisfactory filtering performance of existing power filters when applied to quantum computers. Summary of the Invention

[0003] To address the filtering problem in quantum computers as described in the background section, this invention proposes the following technical solution:

[0004] A power supply filtering circuit for a quantum computer, the power supply filtering circuit comprising: a power supply circuit, a switching circuit, and a filtering module;

[0005] The input terminal of the power supply circuit is used to receive the input voltage, and the output terminal of the power supply circuit is used to supply the input voltage to the filter module.

[0006] The switching circuit includes a thyristor electronic switch, and the switching circuit controls the conduction of the entire power supply circuit by adjusting the forward voltage between the anode and cathode of the thyristor electronic switch.

[0007] The filtering module includes multi-stage filtering circuits, with each stage of the filtering circuits connected by cascade coupling; the filtering module is used to provide filtering power to the power module of the quantum computer.

[0008] Each stage of the filter circuit is an LC filter circuit, which includes a capacitor and an inductor.

[0009] Each of the capacitors is connected in parallel, and the two ends of the circuit formed by the parallel connection of two capacitors are each connected to one of the inductors; the parallel capacitors are used to filter out the ripple signal in the power supply circuit.

[0010] The multi-stage filtering circuits within the filtering module are divided into a front stage and a rear stage, and the number of stages in both the front stage and the rear stage of the multi-stage filtering circuits is three or more.

[0011] The switching circuit further includes a control chip and a step-down rectifier module;

[0012] The input pin of the control chip is connected to the output port of the step-down rectifier module, and the output pin of the control chip is connected to the anode of the thyristor electronic switch after passing through a diode and a resistor.

[0013] The input of the step-down rectifier module is connected to the output port of the power supply circuit. The step-down rectifier module is used to convert the input voltage of the external power supply into the operating voltage of the control chip.

[0014] Furthermore, the two inductors within each stage of the filter circuit are in common mode.

[0015] Furthermore, the control chip is a single-button long-press switch chip.

[0016] Furthermore, the output terminal of the preceding stage shares a node with the input terminal of the quantum computer's measurement and control main power supply module.

[0017] Furthermore, the output port of the latter stage is connected to the AC-to-DC power supply module within the quantum computer.

[0018] Furthermore, the power supply circuit includes multiple thermistors connected in series or parallel; each thermistor is located between the input port of the external power supply and the step-down rectifier module, and each thermistor is used to delay the surge impact generated by the external power supply.

[0019] Furthermore, the step-down rectifier module is an RC step-down regulator circuit.

[0020] Beneficial effects: This invention uses a multi-stage common-mode filter circuit to filter and purify the input signal of the previous stage, thereby effectively suppressing electromagnetic interference such as mains power surges, radiated spurious signals, and stray ripple signals, providing a clean and efficient power supply for the power module of the quantum computer. Attached Figure Description

[0021] Figure 1 A schematic diagram of a power supply filtering circuit for a quantum computer according to an embodiment of the present invention;

[0022] Figure 2 This is a connection diagram of a power supply filtering circuit for a quantum computer according to an embodiment of the present invention;

[0023] Figure 3 This is a control circuit connection structure diagram provided according to an embodiment of the present invention;

[0024] Figure 4 This is a connection structure diagram of a first-stage common-mode filter circuit provided according to an embodiment of the present invention. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0027] Figure 1 This is a schematic diagram of a power supply filtering circuit for a quantum computer according to the present invention.

[0028] refer to Figure 1 A power supply filtering circuit for a quantum computer, located between an external power source and the device, includes: a power supply circuit 1, a switching circuit 2, and a filtering module 3. One end of the power supply circuit 1 is connected to the external power source, and the other end is connected to the filtering module 3. The filtering module 3 includes multi-stage filtering circuits 31, with the output port of each preceding stage filtering circuit 31 serving as the input port of each subsequent stage filtering circuit 31. The switching circuit 2, located between the filtering module 3 and the external power source, controls the conduction of the entire power supply circuit 1. The switching circuit 2 contains a thyristor electronic switch 21. After the power is turned on, the switching circuit 1 inputs a positive voltage signal to the internal thyristor electronic switch 21, causing the entire power supply circuit 1 to close. After multi-stage filtering by the filtering module 3, the power supply circuit 1 outputs the filtered voltage signal to the power supply module of the quantum computer. The multi-stage filtering circuits 31 within the filtering module 3 are divided into pre-stage and post-stage stages, and both the pre-stage and post-stage filtering circuits 31 have at least three stages.

[0029] Figure 2 This is a connection structure diagram of a power supply filter circuit for a quantum computer according to an embodiment of the present invention.

[0030] Figure 3 This is a connection structure diagram of a control circuit according to an embodiment of the present invention.

[0031] Please refer to the above. Figure 2 and Figure 3The switching circuit also includes a buck rectifier module 23 and a power-on / off chip 22. One end of the buck rectifier module is connected to the external power supply output port, and the other end is connected to the input terminal of the power-on / off chip 22. The output terminal of the power-on / off chip is connected to the control port of the switching circuit. The buck rectifier module 23 is an RC (resistor-capacitor) buck regulator circuit. The 220V AC voltage signal output from the external power supply flows into the buck rectifier module 23, is converted into a 5V DC voltage signal, and inputs to the VDD (positive power supply) pin of the power-on / off chip 22. After receiving a press command signal from the KEY (trigger switch) pin, the power-on / off chip 22 outputs a high level to the anode of the SCR electronic switch 21. The control electrode of the SCR electronic switch 21 is connected to the input signal. When the KEY pin of the power-on / off chip 22 receives another press command signal, the OUT pin outputs a low level, and the SCR electronic switch is turned off.

[0032] Figure 4 This is a connection structure diagram of a first-stage common-mode filter circuit provided according to an embodiment of the present invention.

[0033] Please refer to the above. Figure 1 and Figure 4 Each stage of the filter circuit is a common-mode LC (inductor-capacitor) filter circuit. It includes an inductor and a capacitor, with each capacitor connected in parallel and its two ends connected to the inductor. Within each stage of the common-mode LC filter circuit, the common-mode current, ripple signals, and radiated spurious signals in the current signal flowing into the filter circuit are filtered out by the parallel capacitors. The power supply circuit, after passing through multiple stages of common-mode LC filter circuits, is connected to the input terminal of the quantum computer power module.

[0034] Example 1:

[0035] The switching chip is EC20032401-V01-298E, which is a power-on / off chip that can be pressed and held for 1.5 seconds. The step-down voltage regulator circuit adopts an RC step-down voltage regulator circuit, and the filter module adopts a six-stage common-mode LC filter. Both the front-end and rear-end filter circuits are three-stage filter circuits.

[0036] When the positive terminal of the 220V AC voltage signal from the external power supply is input to the power supply circuit, it first flows into the first thermistor, and then into the step-down regulator module 23, the protection circuit formed by parallel capacitors, and the filter module 3. Before the negative terminal of the power supply circuit 1 flows into the external power supply, it first flows into the second thermistor. When the external power supply trips, a sharp pulse current signal is generated instantaneously, causing the resistance of the thermistors to increase rapidly. Each thermistor heats up periodically, delaying the current signal from flowing into the downstream circuit components. Thus, during the delay, the energy of the current signal is dispersed by the capacitors and inductors in the filter module 3. The 220V AC signal generated by the external power supply is input to the AC to DC power supply module 4 of the nuclear magnetic quantum computer's measurement and control main power supply after passing through the three-stage common-mode LC filter circuit 31; after passing through the six-stage common-mode LC filter circuit, it is input to the nuclear magnetic quantum computer's field AC to DC power supply module 5. The output port of the three-stage common-mode LC filter circuit 31 shares a node with the input port of the nuclear magnetic quantum computer's measurement and control main power supply module 4. The 220V AC signal from the external power supply flows into the RC step-down regulator circuit. After passing through the cascading resistor and the RC parallel circuit, it flows into the parallel Zener diode and a general-purpose diode. The capacitor in the RC parallel circuit uses capacitive reactance to counteract AC voltage, thus converting the 220V AC signal into a 5V DC signal. After passing through the filter capacitor, this DC signal is input to the VDD pin of the power-on / off chip. The cascading resistor releases residual energy from the capacitor when power is off.

[0037] At the power-on / off chip, the NC and OPT pins are left floating. The KEY and GND pins are connected to the push-button switch and then to the negative terminal of the power supply circuit. The OUT pin is connected to an external ordinary diode and resistor and then input to the anode of the thyristor electronic switch 21. After pressing and holding the push-button switch for 1.5 seconds, the power-on / off chip 22 outputs a high level, the thyristor electronic switch 21 is turned on, and the filter module 3 inputs the multi-stage filtered voltage signal to the NMR quantum computer measurement and control main control power supply module and the NMR quantum computer field equalization power supply module, respectively.

[0038] In summary, this invention effectively suppresses electromagnetic interference such as mains power surges, radiated spurious signals, and stray ripple signals by filtering and purifying the input signal of the preceding stage through a multi-stage common-mode filter circuit, thus providing a clean and efficient power supply for subsequent circuits. Furthermore, the power circuit's conduction is controlled by a power-on / off chip, allowing users to control the quantum computer's power input with a single button press. Additionally, a thermistor is placed before the input filter circuit and the buck regulator circuit in the power circuit. In the event of a surge, the thermistor delays the surge impact, and during the delay, the capacitors and inductors within the filter circuit disperse the surge energy, thereby reducing the impact of the surge.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A power supply filtering circuit for a quantum computer, characterized in that, The power supply filtering circuit includes: a power supply circuit (1), a switching circuit (2), and a filtering module (3); The input terminal of the power supply circuit (1) is used to receive the input voltage, and the output terminal of the power supply circuit (1) is used to supply the input voltage to the filter module (3). The switching circuit (2) is equipped with a thyristor electronic switch (21). The switching circuit (2) controls the conduction of the entire power supply circuit (1) by adjusting the positive voltage between the anode and cathode in the thyristor electronic switch (21). The filtering module (3) includes a multi-stage filtering circuit (31), and each stage of the filtering circuit (31) is connected by cascading coupling; the filtering module (3) is used to provide filtering power supply for the power module of the quantum computer; The switching circuit (2) also includes: a control chip (22) and a step-down rectifier module (23); The input pin of the control chip (22) is connected to the output port of the step-down rectifier module (23), and the output pin of the control chip (22) is connected to the anode of the thyristor electronic switch (21) after passing through a diode and a resistor. The input of the step-down rectifier module (23) is connected to the output port of the power supply circuit (1). The step-down rectifier module (23) is used to convert the input voltage of the external power supply into the working voltage of the control chip (22). The control chip (22) is a single-button long-press switch chip.

2. The power supply filtering circuit for a quantum computer according to claim 1, characterized in that, Each stage of the filter circuit (31) is an LC filter circuit (31), which includes: a capacitor and an inductor; Each of the capacitors is connected in parallel, and the two ends of the circuit formed by the parallel connection of the two capacitors are each connected to one of the inductors; the parallel capacitors are used to filter out the ripple signal in the power supply circuit (1).

3. A power supply filtering circuit for a quantum computer according to claim 2, characterized in that, The two inductors in each stage of the filter circuit (31) are in common mode.

4. A power supply filtering circuit for a quantum computer according to claim 1, characterized in that, The multi-stage filtering circuit (31) within the filtering module is divided into a front stage and a rear stage, and the number of stages of the multi-stage filtering circuit (31) within the front stage and the rear stage is three or more.

5. A power supply filtering circuit for a quantum computer according to claim 4, characterized in that, The output terminal of the preceding stage shares a node with the input terminal of the quantum computer measurement and control main power supply module (4).

6. A power supply filtering circuit for a quantum computer according to claim 4, characterized in that, The output port of the latter stage is connected to the AC-to-DC power supply module (5) inside the quantum computer.

7. A power supply filtering circuit for a quantum computer according to claim 1, characterized in that, The power supply circuit (1) is provided with multiple thermistors connected in series or in parallel; each thermistor is located between the input port of the external power supply and the step-down rectifier module (23), and each thermistor is used to delay the surge impact generated by the external power supply.

8. A power supply filtering circuit for a quantum computer according to claim 1, characterized in that, The step-down rectifier module (23) is an RC step-down voltage regulator circuit.

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