Harmonic voltage combined generation device based on pulse-driven quantum voltage source

Abstract

The invention discloses a harmonic voltage combined generation device based on a pulse-driven quantum voltage source, which comprises two Josephson junction arrays, outputs of the two Josephson junction arrays are connected in series to form a standard source voltage signal, the output of one pulse code pattern generator serves as the input of one Josephson junction array to form a first synthesis channel, and the output of the other pulse code pattern generator serves as the input of the other Josephson junction array to form a second synthesis channel. The output of the other pulse code pattern generator serves as the input of the other Josephson junction array to form a second synthesis channel, the first synthesis channel outputs fundamental wave voltage, and the second synthesis channel outputs second harmonic and higher harmonic voltage; a driving compensation input port of the Josephson junction array in the first synthesis channel is connected with a compensation signal source through an isolation amplifier, and the compensation signal source is used for generating an alternating current voltage signal with the same frequency as the fundamental wave voltage; and the isolation amplifier is responsible for converting an AC voltage signal output by the compensation signal source into an AC current signal for driving pulse correction. According to the invention, complex fundamental wave and multi-harmonic wave synthesis can be realized.

Description

Technical Field

[0001] This invention relates to a harmonic voltage combination generation device based on a pulse-driven quantum voltage source. Background Technology

[0002] New power systems place high demands on the accurate and reliable tracing of harmonic voltages. However, traditional measurement methods struggle to accurately calibrate harmonic voltage signals containing multiple frequency components with small amplitudes. While some literature has attempted to use programmable quantum voltage standards for quantized harmonic measurements, their development is hampered by limitations in frequency range, the inability to handle complex harmonics, and the difficulty in calibrating small-amplitude harmonics. The pulse-driven AC quantum voltage source—the Josephson arbitrary waveform synthesizer (JAWS)—can generate extremely complex harmonic voltages with amplitudes down to the nV level, making it the optimal solution for harmonic tracing. However, when synthesizing signals containing fundamental and harmonic components, existing JAWS methods are only suitable for synthesizing signals with single or two frequency components for large-amplitude synthesis requirements (e.g., fundamental effective values ​​greater than 300mV), making it difficult to achieve complex fundamental-plus-harmonic synthesis. This limits the amplitude of the fundamental-plus-harmonic voltage signal synthesized by traditional compensation methods, failing to meet the calibration and tracing requirements in the electrical field. Summary of the Invention

[0003] To address the aforementioned problems, the present invention aims to provide a harmonic voltage combination generation device based on a pulse-driven quantum voltage source, which enables the synthesis of quantum voltage when the fundamental frequency has a large amplitude.

[0004] To achieve the above objectives, the present invention provides a harmonic voltage combination generation device based on a pulse-driven quantum voltage source, comprising two Josephson arrays. The outputs of the two Josephson arrays are connected in series to form a standard source voltage signal output. The output of one pulse pattern generator serves as the input to one Josephson array, forming a first synthesis channel. The output of the other pulse pattern generator serves as the input to the other Josephson array, forming a second synthesis channel. The first synthesis channel outputs a fundamental voltage, and the second synthesis channel outputs second and higher harmonic voltages. The standard source voltage signal is a composite voltage of the fundamental voltage and the second and higher harmonic voltages. In the first synthesis channel, the drive compensation input port of the Josephson array is connected to a compensation signal source via an isolation amplifier. The compensation signal source generates an AC voltage signal with the same frequency as the fundamental voltage. The isolation amplifier converts the AC voltage signal output by the compensation signal source into an AC current signal for correction of the Josephson array drive pulse.

[0005] A further aspect of the solution is that a microwave amplifier is provided between the pulse code generator and the Josephson array.

[0006] A further step in the scheme is as follows: a host computer is connected to the pulse code generator and compensation signal source of the first and second synthesis channels. The host computer generates pulse digital codes and compensation signals and sends them to the pulse code generator and compensation signal source of the first and second synthesis channels.

[0007] A further aspect of the scheme is that the pulse code generator of the first synthesis channel stores the digital code of the fundamental wave, and the pulse code generator of the second synthesis channel stores the digital code corresponding to the harmonic voltages containing the second harmonic and higher harmonics.

[0008] The solution further includes: the pulse code generator is a Keysight M8195A, or a German-made BPG series device, or an American-made ABG series device.

[0009] The solution further specifies that the microwave amplifier is model MD-50.

[0010] The beneficial effects of this invention are: it has a simple structure; by connecting two Josephson arrays in series, it can synthesize a fundamental wave with an effective value greater than 300mV; and it can realize complex synthesis of fundamental wave plus multiple harmonics.

[0011] The invention will be further explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the circuit structure of the present invention; Figure 2 A schematic diagram of the fundamental wave signal generated by the first synthesis channel; Figure 3 A schematic diagram of the second harmonic and higher harmonic signals generated by the second synthesis channel; Figure 4 This is a schematic diagram of the synthesized fundamental and harmonic signals output. Detailed Implementation

[0013] Harmonic voltage combination generation device based on pulse-driven quantum voltage source, such as Figure 1As shown, the device includes two Josephson arrays. The outputs of the two Josephson arrays are connected in series to form a standard source voltage signal V. The output of one pulse pattern generator 101 serves as the input of one Josephson array 102 to form a first synthesis channel 1, and the output of the other pulse pattern generator 201 serves as the input of another Josephson array 202 to form a second synthesis channel 2. The first synthesis channel 1 outputs the fundamental voltage, and the second synthesis channel 2 outputs the second harmonic and higher harmonic voltages. The standard source voltage signal is a synthesized voltage of the fundamental voltage and the second and higher harmonic voltages, which is the standard source voltage signal V. In the first synthesis channel, the drive compensation input port of the Josephson array 102 is connected to a compensation signal source 104 through an isolation amplifier 103. The compensation signal source 104 is used to generate an AC voltage signal with the same frequency as the fundamental voltage. The isolation amplifier 103 is responsible for converting the AC voltage signal output by the compensation signal source 104 into an AC current signal for the correction of the Josephson array drive pulse.

[0014] In this embodiment, to ensure the stability of the pulse pattern generator signal, a microwave amplifier 105 is provided between the pulse pattern generator 101 and the Josephson array 102 in the first synthesis channel 1, and a microwave amplifier 203 is provided between the pulse pattern generator 201 and the Josephson array 202 in the second synthesis channel 2.

[0015] The pulse code generator can be designed to generate fixed pulse signals on its own, and the compensation signal source 104 can generate compensation signals on its own. However, in this embodiment, for the sake of flexible control, a host computer (computer, not shown in the figure) is connected to the pulse code generator and compensation signal source of the first synthesis channel and the second synthesis channel. The host computer generates pulse digital codes and compensation signals and sends them to the pulse code generator and compensation signal source of the first synthesis channel and the second synthesis channel.

[0016] Wherein: the pulse code generator 101 of the first synthesis channel 1 stores the digital code of the fundamental wave, and the pulse code generator 201 of the second synthesis channel 2 stores the digital code corresponding to the harmonic voltage including the second harmonic and higher harmonics.

[0017] The pulse pattern generator converts the pulse pattern into a pulse signal to drive the Josephson array, or inputs it into a microwave amplifier. The microwave amplifier amplifies the signal and drives the Josephson array. The Josephson array converts the driving current pulse into a series of magnetic flux quanta, and the filtered signal is the waveform to be synthesized.

[0018] In the first synthesis channel, due to the large low-frequency components corresponding to the fundamental code, a compensation signal source and an isolation amplifier are required to correct the driving pulse. The compensation signal source mainly generates an AC voltage signal with the same frequency as the fundamental wave. The isolation amplifier is responsible for converting the AC voltage signal output from the compensation signal source into an AC current signal, and its output is connected to the compensation input port of the Josephson array.

[0019] In the second synthesis channel, since the amplitude of the harmonic voltage is not large and the corresponding low-frequency components are not large, the Josephson array can work normally without the use of compensation current.

[0020] The pulse code generator is a Keysight M8195A, or a BPG series device from Germany, or an ABG series device from the United States. The microwave amplifier is an MD-50.

[0021] The above-described embodiment of the harmonic voltage combination generation device of the pulse-driven quantum voltage source can synthesize a fundamental wave with an effective value greater than 300mV by connecting two Josephson arrays in series, and can also realize complex fundamental wave plus multi-harmonic synthesis.

Claims

1. A harmonic voltage combination generation device based on a pulsed driven quantum voltage source, comprising two arrays of Josephson junctions, characterized in that, The outputs of two Josephson junction arrays are connected in series to form a standard source voltage signal output, wherein the output of one pulse code generator is used as the input of one Josephson junction array to form a first synthesis channel, and the output of another pulse code generator is used as the input of another Josephson junction array to form a second synthesis channel, the first synthesis channel outputs fundamental wave voltage, and the second synthesis channel outputs second harmonic and high harmonic voltage, and the standard source voltage signal is the synthesized voltage of the fundamental wave voltage and the second harmonic and high harmonic voltage; in the first synthesis channel, the driving compensation input port of the Josephson junction array is connected to a compensation signal source through an isolation amplifier, the compensation signal source is used to generate an alternating voltage signal with the same frequency as the fundamental wave voltage, and the isolation amplifier is responsible for converting the alternating voltage signal output by the compensation signal source into an alternating current signal for correcting the driving pulse of the Josephson junction array.

2. The harmonic voltage combination generation device according to claim 1, wherein A microwave amplifier is arranged between the pulse code generator and the Josephson junction array.

3. The harmonic voltage combination generation device according to claim 1, wherein A host computer is connected to the pulse code generators of the first synthesis channel and the second synthesis channel and the compensation signal source, and the host computer generates pulse digital codes and compensation signals and sends them to the pulse code generators of the first synthesis channel and the second synthesis channel and the compensation signal source.

4. The harmonic voltage combination generation device according to claim 3, wherein The pulse code generator of the first synthesis channel stores the digital code of the fundamental wave, and the pulse code generator of the second synthesis channel stores the digital code corresponding to the harmonic voltage containing the second harmonic and high harmonic.

5. The harmonic voltage combination generation device according to claim 1, characterized by The pulse code generator is M8195A of Keysight Company, or BPG series equipment of Germany, or ABG series equipment of the United States.

6. The harmonic voltage combination generation device according to claim 2, wherein The model of the microwave amplifier is MD-50.

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