CN211239813U - Multi-channel voltage source - Google Patents
Multi-channel voltage source Download PDFInfo
- Publication number
- CN211239813U CN211239813U CN202020139496.1U CN202020139496U CN211239813U CN 211239813 U CN211239813 U CN 211239813U CN 202020139496 U CN202020139496 U CN 202020139496U CN 211239813 U CN211239813 U CN 211239813U
- Authority
- CN
- China
- Prior art keywords
- signal
- signals
- voltage source
- unit
- sub
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
Abstract
The application discloses multichannel voltage source includes: the signal source unit is positioned in the first temperature zone, and the multiplexing unit and the signal modulation unit are positioned in the second temperature zone and are arranged on a PCB (printed Circuit Board); wherein the first temperature zone temperature is higher than the second temperature zone temperature; the signal source unit is used for outputting a mixed signal containing a plurality of sub-signals with pulse waveforms; wherein each of the sub-signals is in a different time slot; the multiplexing unit is connected with the signal source unit through a transmission line and is used for splitting the mixed signal into signals to be modulated which correspond to the sub-signals one by one according to the time slot; the signal modulation unit is connected with the multiplexing unit and used for rectifying and filtering each signal to be modulated and outputting a plurality of paths of direct current signals. The multi-channel voltage source provided by the application has the advantages of simple structure, small size, high integration level, low noise and high precision.
Description
Technical Field
The application belongs to the field of power electronics, and particularly relates to a multi-channel voltage source.
Background
At present, the testing and the application of the superconducting quantum chip are both carried out in a dilution refrigerator (the working temperature is 3K-10mK), any superconducting quantum bit needs to provide a high-precision direct-current voltage signal along with the continuous increase of the bit number of the superconducting quantum chip, and when the bit number of the superconducting quantum chip reaches thousands or even tens of thousands, the high-precision direct-current voltage signal needs to be provided by tens of thousands of paths. The limited space of the dilution refrigerator is smaller and smaller, the input and output connection complexity is higher and higher, and a common voltage source is adopted, so that the common voltage source is large in size and cannot directly work in the dilution refrigerator, and if the common voltage source is arranged outside the dilution refrigerator and used for providing voltage signals, the number of cables required for providing high-precision direct current signals is too large, and the input and output connection integration of the dilution refrigerator is difficult to realize; when the voltage signal passes through the dilution refrigerator, signal noise is increased due to thermal settling, and signal accuracy is deteriorated.
In summary, a multi-channel voltage source which is applicable to a low-temperature environment, has a simple structure, a small volume, a high integration level, low noise of an output direct-current signal, and high precision is lacking in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a multichannel voltage source, it can solve not enough among the prior art, can be applicable to the low temperature environment, and simple structure, small, the integrated level is high, and the direct current signal noise of output is little, the precision is high.
The technical scheme adopted by the application is as follows:
a multi-channel voltage source comprising: the signal source unit is positioned in the first temperature zone, and the multiplexing unit and the signal modulation unit are positioned in the second temperature zone and are arranged on a PCB (printed Circuit Board); wherein the first temperature zone temperature is higher than the second temperature zone temperature; the signal source unit is used for outputting a mixed signal containing a plurality of sub-signals with pulse waveforms; wherein each of the sub-signals is in a different time slot; the multiplexing unit is connected with the signal source unit through a transmission line and is used for splitting the mixed signal into signals to be modulated which correspond to the sub-signals one by one according to the time slot; the signal modulation unit is connected with the multiplexing unit and used for rectifying and filtering each signal to be modulated and outputting a plurality of paths of direct current signals.
Further, the signal source unit includes at least one DAC module.
Further, the frequencies of the sub-signals are the same.
Further, the multiplexing unit is a CMOS multiplexer.
Further, the CMOS multiplexer is a MUX chip.
Further, the signal modulation unit comprises a rectification module and a filtering module; the rectification module is connected with the multiplexing unit and is used for rectifying the signal to be modulated to obtain a forward signal to be modulated; the filtering module is connected with the rectifying module and is used for filtering the forward signal to be modulated to obtain the direct current signal.
Further, the rectifier module is a rectifier diode and/or a rectifier bridge.
Further, the filtering module is a low-pass filter.
Further, the low-pass filter is an RC filter and/or an LC filter.
Further, the system also comprises an operational amplifier conversion module; the operational amplifier conversion module is connected with the output end of the signal modulation unit and is used for respectively amplifying and converting each received direct current signal and outputting the processed signal.
Compared with the prior art, the signal source unit is arranged in the first temperature zone and used for outputting a mixed signal containing a plurality of sub-signals with pulse waveforms; each sub-signal is positioned on different time slots, so that any sub-signal can be adjusted in a targeted manner, and the precision of each sub-signal in the mixed signal is ensured; the mixed signal is divided into signals to be modulated which correspond to the sub-signals one by one according to time slots by a multiplexing unit arranged on a PCB of the second temperature zone and a transmission line; the mixed signal is transmitted through one transmission line, so that signal crosstalk and noise can be effectively reduced, the mixed signal is split through the multiplexing unit, the effect of outputting a direct current signal in multiple channels is achieved, the integration level is improved, and the multi-channel direct current signal transmission device is simple in structure and small in size; the waveform of the signal to be modulated is compared with the pulse waveform of the sub-signal, so that distortion is avoided, and the accuracy of the output signal is improved; and the signal modulation unit on the PCB board is connected with the multiplexing unit, and is used for rectifying and filtering each analog signal to be modulated, outputting a plurality of direct current signals, and comparing with the direct current signals generated by the signal source unit and transmitted to the superconducting qubit chip, the provided direct current signals have the characteristics of high precision and low noise. The multichannel voltage source provided by the application has the advantages of simple structure, small size, high integration level, low noise of output multichannel direct current signals and high precision.
Drawings
FIG. 1 is a functional block diagram of the present application;
FIG. 2 is a schematic diagram of a DAC module for generating a mixed signal according to the present invention
FIG. 3 is a schematic diagram of a CMOS multiplexer module according to the present application for splitting mixed signals;
FIG. 4 is a diagram of a CMOS mux module assembly of the present application;
FIG. 5 is a schematic diagram of a signal modulation unit according to the present application;
fig. 6 is a schematic diagram of an operational amplifier conversion module according to the present application.
Detailed Description
The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
The embodiment of the application provides a multichannel voltage source, as shown in fig. 1, comprising a signal source unit 1 located in a first temperature zone, a multiplexing unit 2 and a signal modulation unit 3, which are located in a second temperature zone and are arranged on a PCB 4; wherein the first temperature zone temperature is higher than the second temperature zone temperature; the signal source unit 1 is configured to output a mixed signal including a plurality of sub-signals having pulse waveforms; wherein each of the sub-signals is in a different time slot; the multiplexing unit 2 is connected to the signal source unit 1 through a transmission line 5, and configured to split the mixed signal into to-be-modulated signals corresponding to the sub-signals one to one according to the time slot; the signal modulation unit 3 is connected to the multiplexing unit 2, and is configured to perform rectification and filtering processing on each signal to be modulated, and output a plurality of direct current signals.
As shown in fig. 1, in the embodiment of the present application, the temperature of the first temperature zone is higher than that of the second temperature zone, and specific values of the temperatures of the first temperature zone and the second temperature zone may be set as needed, for example, in quantum computing, the first temperature zone is an external environment of the dilution refrigerator mentioned in the background art, which is usually room temperature, and the second temperature zone is an internal environment of the dilution refrigerator mentioned in the background art, which is usually a low temperature of 3K to 10 mK.
The signal source unit 1 generates the mixed signal including a plurality of sub-signals, wherein the pulse waveforms of the sub-signals may be the same or different, and are set according to the dc signal to be output. It should be noted that each of the sub-signals is located in a different time slot in the mixed signal, so that each of the sub-signals is split into the signals to be modulated in a one-to-one correspondence according to the time slot by the multiplexing unit. The time slot refers to the time occupied by the pulse waveform of each sub-signal in the mixed signal waveform, and any time slot corresponds to one sub-pulse signal.
When the multichannel voltage source is applied to the field of quantum computing and provides a multichannel power supply signal for a superconducting quantum chip, the signal source unit 1 is arranged outside the first temperature zone (250K outside a dilution refrigerator) to provide a mixed signal containing a plurality of sub-signals with pulse waveforms; the mixed signal is split into signals to be modulated which correspond to the sub-signals one by one according to the time slot through the multiplexing unit 2 which is arranged in the second temperature zone (inside the dilution refrigerator and 3K-10mK) and is positioned on a PCB (printed circuit board) 4; and the signal modulation unit 3 arranged on the PCB 4 is connected with the multiplexing unit, rectifies and filters the signals to be modulated, and outputs multi-path high-precision low-noise direct-current signals to the superconducting quantum chip. By adopting the multiplexing unit 2, the number of transmission lines 5 for connecting the internal functional unit and the external functional unit of the dilution refrigerator can be reduced to one, and multi-channel signal transmission can still be realized, so that the input and output integration level of the dilution refrigerator is improved, and the effective space in the dilution refrigerator is efficiently saved; the signal modulation unit 3 arranged in the dilution refrigerator is used for rectifying and filtering the signal to obtain the direct current signal, and compared with the direct current signal directly generated by a signal source and transmitted to the superconducting qubit, the provided direct current signal has the characteristics of low noise and high precision; meanwhile, the multiplexing unit 2 and the signal modulation unit 3 are integrated by adopting a PCB 4, so that the structure is simple and the size is small.
As shown in fig. 2, when the present application is embodied, the signal source unit 1 includes at least one DAC module 11. Specifically, the mixed signal including a plurality of the sub-signals having pulse waveforms may be generated by various signal source devices, such as a signal generator, an arbitrary waveform generator, a DAC module, and the like; in specific implementation, the accuracy of the generated sub-signals needs to be controlled at a signal source, i.e., the signal source device, so that the amplitude and the accuracy of each generated sub-signal can be effectively guaranteed by using a high-bit DAC module, such as a 16-bit DAC module, or even an 18-24-bit DAC module, thereby ensuring that the amplitude of the dc signal processed by the signal modulation unit is more accurate and the accuracy is higher.
The frequencies of the sub-signals generated by the signal source unit 1 are the same. Specifically, each of the sub-signals generated by the signal source unit 1 has frequency and amplitude information, and the frequency of each of the sub-signals may be set to be the same or different. In the specific implementation of the present application, the frequencies of the sub-signals are set to be the same, and the sub-signals can be directly generated by one signal source, and only the amplitude of each sub-signal needs to be set, so that the technical requirements on the signal source are simplified, and the precision of the mixed signal composed of the sub-signals is ensured.
As shown in fig. 3, the multiplexing unit 2 is a CMOS multiplexing module 21. The CMOS mux module 21 is made based on CMOS technology. When the multichannel voltage source is applied to the field of quantum computing, various regulation and control signals required by the operation of the superconducting quantum chip are very weak, so that the requirement on the operating environment of the superconducting quantum chip, namely the environment inside the dilution refrigerator, is extremely high, and the multichannel voltage source needs to have the characteristics of low noise and low power consumption. In the technical field of electronics, the CMOS process achieves the purpose of transmitting electrical signals by arranging a PMOS and an NMOS which are complementary and symmetrical, has the characteristics of low noise and low power consumption, and can provide guarantee for the transmission of regulation and control signals required by a superconducting quantum chip.
With the increase of the number of bits of the superconducting quantum bit, the number of the required paths of the direct current signal is increased, and the mixed signal containing each sub-signal generated by the signal source is split by arranging the CMOS multiplexing module 21, and the signal to be modulated corresponding to each sub-signal one to one is output, so that the purpose of signal multiplexing is achieved. In the field of communication technology, signal multiplexing technology may include frequency division multiplexing, time division multiplexing, code division multiplexing, and the like. The CMOS multiplexing module 21 described in the present application uses a time division multiplexing principle, and allocates each sub-signal to different time slots to form the mixed signal; and the mixed signal is split into the signals to be modulated corresponding to the sub-signals one to one through the CMOS multiplexing module 21 according to the time slot.
As shown in fig. 4, when the number of bits of the superconducting qubit reaches thousands of bits, and the number of the dc signal paths to be provided is also as high as ten thousands of bits, one CMOS multiplexing module 21 cannot meet the requirement of the number of channels for signal multiplexing, and a combination of a plurality of CMOS multiplexing modules 21 may be used.
As shown in fig. 5, the CMOS multiplexing module 21 is a MUX chip 211, and is configured to split the mixed signal into the signals to be modulated. The MUX chip is simple in packaging, small in size and easy to integrate, and when a voltage source prepared by the CMOS multiplexing module 21 based on the MUX chip 211 is used for providing a multichannel direct-current signal for the superconducting quantum chip, the space utilization rate of the first temperature zone, namely the dilution refrigerator, in which the superconducting quantum chip works can be effectively improved.
As shown in fig. 5, the signal modulation unit 3 includes a rectification module 31 and a filtering module 32; the rectifying module 31 is connected to the multiplexing unit 2, and configured to rectify the signal to be modulated to obtain a forward signal to be modulated; the filtering module 32 is connected to the rectifying module 31, and configured to filter the forward to-be-modulated signal to obtain the dc signal.
Each signal to be modulated output by the multiplexing unit 2 is an analog signal containing frequency and amplitude parameters, and cannot be directly used as a direct current signal source, and the analog sub-signal to be rectified needs to be processed into the signal to be modulated by the rectifying module 31, and the signal to be modulated in the forward direction needs to be filtered by the filtering module 32, so that the direct current signal with single frequency and small ripple is obtained and used as an output signal of the voltage source.
The multiplexing unit 2 is adopted to split a mixed signal of a plurality of sub-signals with pulse waveforms generated by the signal source unit 1 according to time slots, so as to obtain signals to be modulated which correspond to the sub-signals one by one; for each signal to be modulated, compared with a time division multiplexing scheme, frequency screening is not needed, and only rectification and filtering processing is needed; the rectifying modules 31 can be designed according to a uniform technical index, and similarly, the filtering modules 32 can also be designed according to a uniform technical index, so that the rectifying modules 31 and the filtering modules 32 which are in one-to-one correspondence to each signal to be modulated are avoided, the design difficulty of the multi-channel voltage source is reduced, and the consistency of the output multi-channel direct current signals is improved.
As shown in fig. 5, the rectifier module 31 is a rectifier diode and/or a rectifier bridge. In the present application, when applied specifically to superconducting quantum chip testing, the rectifier diode 311 is preferred. The positive terminal of the rectifier diode 311 is connected to the multiplexing unit 2, that is, the MUX chip 211, receives the signal to be modulated output by the MUX chip 211, cuts off the reverse signal to be modulated by means of the forward conduction characteristic of the rectifier diode 311, and outputs a signal to be modulated, which only contains a forward half-wave, through the negative terminal. The rectifier diode 311 is a passive device, and can effectively reduce additional power consumption and electromagnetic crosstalk influence caused by the supply voltage or current of the rectifier module 31.
As shown in fig. 5, the filtering module 32 includes a low pass filter 321. The low-pass filter 321 is connected to the cathode of the rectifier diode 311, the low-pass filter 321 adopts a capacitor, and the capacitor can filter the half-wave signal to be modulated which is output by the rectifier diode 311 and only includes the forward direction by utilizing the charging and discharging functions of the capacitor, so that the amplitude of the forward half-wave signal to be modulated is stabilized at a fixed value and has small ripple, and the direct current signal is obtained.
The low pass filter 321 is an RC filter and/or an LC filter. The low-pass filter has a function of filtering high-frequency stray signals, and when the low-pass filter is applied to the quantum field, the low-pass filter 321 can adopt one or more of an RC filter and an LC filter, so that the circuit is simple in structure, small in size and easy to integrate; preferably, one or more of a passive RC filter and a passive LC filter can be used, so that the additional power consumption and the electromagnetic crosstalk influence caused by the operating voltage or current can be effectively reduced.
As shown in fig. 6, the present application further includes an operational amplifier conversion module 61; the operational amplifier conversion module 61 is connected to the output end of the signal modulation unit 3, and is configured to amplify and convert each received dc signal, and output the processed signal.
Specifically, the application scenarios of the multi-channel voltage source of the present application are different, and the requirements for the precision and the amplitude of the output dc signal are also different, and various conversion circuits, such as an addition circuit, a subtraction circuit, and the like, can be implemented by the operational amplifier conversion module 61, so that the dc signal is converted into a dc signal with a specific amplitude interval and small fluctuation, which is required by a user, and the requirements of various dc signal sources are met.
The signal source unit 1 is arranged in the first temperature zone and used for outputting the mixed signal containing a plurality of sub-signals with pulse waveforms; each sub-signal is positioned on different time slots, so that any sub-signal can be adjusted in a targeted manner, and the precision of each sub-signal in the mixed signal is ensured; the mixed signal is split into signals to be modulated which correspond to the sub-signals one by one according to the time slot through the multiplexing unit 2 arranged on the PCB 4 of the second temperature zone; and the signal modulation unit 3 which is arranged on the PCB 4 and connected with the multiplexing unit 2 is used for rectifying and filtering each modulated signal and outputting a plurality of direct current signals with high precision and low noise to the superconducting quantum chip. By adopting the multiplexing unit 2, the number of transmission lines 5 connected between the functional units in the first temperature zone and the second temperature zone can be reduced to one, multi-channel signal transmission can still be realized, the integration level is improved, and the multi-channel temperature-control device is simple in structure and small in size; and the signal modulation unit 3 arranged in the second temperature zone rectifies and filters the signal to obtain the direct current signal, and compared with the direct current signal generated by the signal source unit 1 and transmitted to the superconducting qubit chip, the provided direct current signal has the characteristics of high precision and low noise.
The construction, features and functions of the present application are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present application, but the present application is not limited by the drawings, and all equivalent embodiments that can be modified or changed according to the idea of the present application are within the scope of the present application without departing from the spirit of the present application.
Claims (10)
1. A multi-channel voltage source, comprising: the signal source unit is positioned in the first temperature zone, and the multiplexing unit and the signal modulation unit are positioned in the second temperature zone and are arranged on a PCB (printed Circuit Board); wherein the first temperature zone temperature is higher than the second temperature zone temperature;
the signal source unit is used for outputting a mixed signal containing a plurality of sub-signals with pulse waveforms; wherein each of the sub-signals is in a different time slot;
the multiplexing unit is connected with the signal source unit through a transmission line and is used for splitting the mixed signal into signals to be modulated which correspond to the sub-signals one by one according to the time slot;
the signal modulation unit is connected with the multiplexing unit and used for rectifying and filtering each signal to be modulated and outputting a plurality of paths of direct current signals.
2. A multi-channel voltage source according to claim 1, characterized in that the signal source unit comprises at least one DAC module.
3. Multi-channel voltage source according to claim 1, characterized in that the frequency of each of said sub-signals is the same.
4. The multi-channel voltage source of claim 1, wherein the multiplexing unit is a CMOS multiplexer.
5. The multi-channel voltage source of claim 4, wherein the CMOS multiplexer is a MUX chip.
6. The multi-channel voltage source of claim 1, wherein the signal modulation unit comprises a rectification module and a filtering module;
the rectification module is connected with the multiplexing unit and is used for rectifying the signal to be modulated to obtain a forward signal to be modulated;
the filtering module is connected with the rectifying module and is used for filtering the forward signal to be modulated to obtain the direct current signal.
7. Multi-channel voltage source according to claim 6, characterized in that the rectifying modules are rectifying diodes and/or rectifying bridges.
8. Multi-channel voltage supply according to claim 6, characterized in that the filtering module is a low-pass filter.
9. Multichannel voltage source according to claim 8, characterized in that the low-pass filter is an RC filter and/or an LC filter.
10. The multi-channel voltage source of claim 1, further comprising an operational amplifier conversion module;
the operational amplifier conversion module is connected with the output end of the signal modulation unit and is used for respectively amplifying and converting each received direct current signal and outputting the processed signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020139496.1U CN211239813U (en) | 2020-01-21 | 2020-01-21 | Multi-channel voltage source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020139496.1U CN211239813U (en) | 2020-01-21 | 2020-01-21 | Multi-channel voltage source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211239813U true CN211239813U (en) | 2020-08-11 |
Family
ID=71925519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020139496.1U Active CN211239813U (en) | 2020-01-21 | 2020-01-21 | Multi-channel voltage source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211239813U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113589148A (en) * | 2021-08-18 | 2021-11-02 | 深钛智能科技(苏州)有限公司 | Multi-channel power panel for chip testing field |
| WO2022148316A1 (en) * | 2021-01-05 | 2022-07-14 | 中国科学技术大学 | Architecture of superconducting quantum computer, and information processing method |
-
2020
- 2020-01-21 CN CN202020139496.1U patent/CN211239813U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022148316A1 (en) * | 2021-01-05 | 2022-07-14 | 中国科学技术大学 | Architecture of superconducting quantum computer, and information processing method |
| CN113589148A (en) * | 2021-08-18 | 2021-11-02 | 深钛智能科技(苏州)有限公司 | Multi-channel power panel for chip testing field |
| CN113589148B (en) * | 2021-08-18 | 2023-09-01 | 深钛智能科技(苏州)有限公司 | A multichannel power strip for chip test field |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211239813U (en) | Multi-channel voltage source | |
| Wang et al. | Direct sequence spread spectrum-based PWM strategy for harmonic reduction and communication | |
| US20130278438A1 (en) | Isolator system with status data integrated with measurement data | |
| JP2004236084A (en) | Receiving circuit and transmitting circuit | |
| CN102624427B (en) | Synchronous transmission system of energy and information | |
| CN216697325U (en) | Quantum control system and quantum computer | |
| CN110750126B (en) | Multi-channel voltage source suitable for low-temperature environment | |
| EP3166202B1 (en) | Power transmitting apparatus and power receiving apparatus | |
| CN212302332U (en) | Multi-channel voltage source | |
| WO2020082323A1 (en) | Fingerprint detection coding apparatus, fingerprint detection system and electronic device | |
| CN104524692A (en) | Implantable multi-channel electroneurographic signal acquisition circuit and achieving method thereof | |
| CN217213646U (en) | 16-channel precision direct current voltage source | |
| CN113866492A (en) | Linear isolation sampling method for direct-current voltage signal | |
| CN210986106U (en) | Baseband interference signal generating circuit | |
| CN202750008U (en) | Low-ripple wave heavy current DC-DC switch module power supply | |
| US20140077884A1 (en) | High voltage amplifiers and methods | |
| CN212649748U (en) | Can synchronous signal conversion control chip | |
| Zeng et al. | VHF Band Dual-Channel High-Power Transmitter and Receiver Module | |
| CN215581150U (en) | Radio frequency sampling circuit | |
| CN109379307A (en) | A kind of continuous-time equalizer circuit of high-speed serial communication | |
| US20240129171A1 (en) | Signal transmission device, signal transmission method and communication system | |
| CN219535895U (en) | Control circuit and switching power supply system | |
| CN217216545U (en) | IO control pulse input interface circuit | |
| US20100039084A1 (en) | Controllable circuit | |
| CN218162222U (en) | 3U VPX power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |