RU174301U1 - PRECISION POWER SUPPLY WITH AUTO RESET SYSTEM FOR A SUPERCONDUCTIVE SINGLE-PHOTON DETECTOR - Google Patents

Abstract

The utility model relates to precision, tunable, and stabilized current or voltage sources. A precision power supply with an auto-reset system for a superconductor detector includes galvanically isolated analog and digital parts, and the analog part is powered by a battery. The analog part includes a bias source for setting the required current or voltage value and providing an appropriate mode for stabilizing the current or voltage, a power adapter for decoupling the power of the connected external device and the electrical signal removed from it, an amplifier for registering the signal from the external device, and an auto-reset system for automatically maintaining the working superconducting single-photon detector during its transition to an unstable state. The digital part includes a microcontroller for control with a bias source, a control panel and a display to enable the user to set the required current or voltage at the bias source, and a unit for connecting a personal computer to a power source. and power stability and automatic maintenance of a single-photon superconducting detector. 2 ill.

Description

The utility model relates to power sources, in particular to precision, tunable and stabilized current or voltage sources.

From the patent of the Russian Federation RU 2467376 (published on November 20, 2012; IPC G05F 1/10, G05B 11/00), a voltage regulator is known for use in power supply systems. It contains a computing unit, a control unit, a tuner, and a memory unit. The first output of the computing unit is connected to the control input of the control unit, and the power input of the control unit is connected to the corresponding input of the voltage regulator. The power output of the control unit is connected to the output of the voltage regulator, the input and output of the voltage regulator are also connected to the measurement inputs of the input and output voltage of the computing unit, respectively. The second of the outputs of the computing unit is connected to the input of the tuner. The output of the tuner is connected to the input of the memory block, and the output of the memory block is connected to the corresponding input of the computing unit. The technical result consists in increasing the accuracy and reliability of the voltage regulator and simplifying the design.

The disadvantage of this known solution is the possibility of pickups from the power source of the voltage regulator in the output signal, which makes it impossible to use it for powering high-precision devices, such as highly sensitive sensors.

The following analogue is disclosed in US patent US 6476582 (published 05.11.2002; IPC G05F 1/00, H01M 10/42, H01M 10/44, H02J 7/00). This patent describes a power supply intended for measuring systems with low noise or for measuring the characteristics of electronic components, such as highly sensitive sensors, when noise from an external AC source affects the measured characteristics.

The power supply contains a power supply enclosed in a shield for protection against external interference and allowing precise control of the output current or voltage. It also contains a battery pack and a resistance box to set the desired output voltage or current; power supply control and monitoring unit; a two-way signal transmission unit for converting an electrical signal from a control and monitoring unit into an optical or acoustic signal and transmitting it to the power supply, and vice versa. Thus, the power supply and the control and monitoring unit of the power supply are electrically isolated from each other. The power supply unit includes an on / off control unit, a battery control unit, a resistance magazine control unit, and a power supply control unit. Once the required current or voltage is installed, it is possible to disconnect from the main (external) power source in order to avoid interference. The power source may further include a charger for charging batteries.

The disadvantage of the analogue is the limited ability to precisely control the output current or voltage, since the power source cannot produce a stable value of the output quantity with a sharp increase in the internal resistance of a single-photon superconductor detector.

The closest analogue of the considered technical solution is disclosed in the patent for utility model No. 137798 "Precision power source." Antipov A.A., Ozhegov R.V., Troisky P.V., Rosenthal V.A. (IPC Class 7: G05F1). The patent describes a useful model of a precision power supply intended for measuring systems with low noise or for measuring the characteristics of electronic components, such as highly sensitive sensors, when noise from an external AC source affects the measured characteristics.

The precision power supply includes galvanically isolated analog and digital parts of the power supply, while the analog part also includes a bias source to set the desired current or voltage during operation of the external device and provide stabilization mode, respectively, of the current or voltage, a power adapter for decoupling the power to be connected an external device and an electric signal removed from it, and an amplifier for recording a signal from an external device, the digital part includes a microcontroller for control with a bias source, a control panel and a display to enable the user to set the required value of current or voltage at the bias source, and a unit for connecting a personal computer to a power source;

The disadvantage of the closest analogue is the limited ability to automatically maintain the operating mode of a superconducting single-photon detector.

The inventive utility model is designed to eliminate the above disadvantages of known technical solutions and to provide a precise, tunable power source with high stability of the output parameters for a superconducting single-photon detector.

The technical result is to increase the accuracy and stability of the power supply of a superconducting single-photon detector, in particular, when feedback is provided between the power source and the detector connected to it, as well as the ability to automatically maintain the operating mode of the detector with a sharp change in its internal resistance.

The technical result is achieved due to the fact that the precision power source includes galvanically isolated analog and digital parts, and the analog part is powered by a battery. The analog part includes a bias source for setting the required current or voltage and providing the appropriate stabilization mode (current or voltage), a power adapter for decoupling the power of the connected external device and the electrical signal removed from it, and an amplifier for recording the signal from the external device, as well as a system auto reset to control the internal resistance of external devices. The digital part includes a microcontroller for control with a bias source, a control panel and a display to enable the user to set the required current or voltage at the bias source, and a unit for connecting a personal computer to the power source.

The main difference between the claimed utility model and the closest analogue is that the auto-reset system, designed to maintain the operating mode of the superconducting single-photon detector, works automatically.

The digital part can be powered by a network adapter.

The precision power source can be configured to supply a stabilized value of current or voltage constant in time to an external device. Alternatively or in addition to this, the precision power supply can also be configured to supply to the external device a stabilized value of current or voltage, varying in a predetermined interval, while recording a signal from an external device.

Next, a utility model is disclosed in more detail with reference to FIG. 1, which shows a block diagram of the inventive precision power source.

The block diagram of a precision power supply includes two main components: the digital part (I) and the analog part (II).

The digital part (I) of the power source includes a control panel (1), a microcontroller (2), a display (3), a unit (4) for connecting a personal computer to the power source.

The control panel (1) and display (3) are used to set the user required currents and voltages on the power source itself. The main function of the microcontroller (2) is the user interaction through the control panel (1), display (3) and the personal computer connection unit (4) with the bias source unit (6) of the analog part (II).

By means of the personal computer connection unit (4), a power source is controlled through a computer to implement stationary and (or) dynamic power modes (operation) of an external device. In stationary mode, a constant constant in time current or voltage value is set on an external device. In dynamic mode, the stabilized value of current or voltage changes in a predetermined interval with the simultaneous removal of an electrical signal from an external device.

To minimize the influence of interference and interference, the digital (I) and analog (II) parts of the precision power supply are galvanically isolated using galvanic isolation (5).

The analog part (II) includes an offset source (6), a power adapter (7) and an amplifier (8) and an auto-reset system (9). The bias source (6) sets the necessary current and voltage for the desired operating mode of the external device. It also provides the operation of stabilization modes of current or voltage on an external device. The power adapter (7) decouples the power supplied to the external device and the electrical signal removed from it. An amplifier (8) is necessary for observing a weak signal from an external device on an oscilloscope or other reading equipment when a high input signal level is required.

The analog part (II) of the precision power source is powered by the battery, since it is the source of the least noise and interference in an external device, thereby ensuring the most stable operation of the latter. The digital part (I) of the precision power supply can be powered by a network adapter, because it is electrically isolated from the analog part (II) and high requirements for noise and interference parameters are not imposed on it.

The inventive precision power source can be used to power a superconducting single-photon detector, which is the aforementioned external device. In this case, the main purpose of the power source is to set such a current level Ib or detector voltage Vb at which its quantum efficiency takes its maximum value. To implement such a detector operation mode, it is necessary to bring the operating current Ib as close as possible to the critical current Ic of the detector, above which the detector goes into an unstable mode of operation. The precision power supply makes it possible to carry out both coarse and smooth adjustment of the current step or voltage, thereby allowing them to be set to the required values with fairly high accuracy. The need for tunability of the power source is due to the fact that all superconducting single-photon detectors differ in their operating parameters, including the value of the critical current Ic, i.e. Each individual detector requires setting its own operating current or voltage.

Another important characteristic of a precision power supply is the automatic stabilization of current or voltage, which is necessary for stable and long-term maintenance of an optimal mode of operation of a superconducting single-photon detector. For this, an auto-reset system is used. The auto-reset system (Fig. 2) allows you to automatically return the detector to operating mode even when it enters an unstable state due to, as a rule, interference in the electrical circuit. In the operating mode, the detector resistance is zero and, in the mode of stabilization of the bias current, the voltage at the detector is small ~ 2 mV and is determined by the resistance of the supplied high-frequency cables. However, under the influence of external disturbing factors (electrical interference, blinding illumination, etc.), the superconductor detector becomes unstable and its sensitivity drops sharply. The auto-reset system monitors the voltage at the detector and, if it exceeds a value of the order of 20 mV, puts the detector into operation by short-circuiting it to ground.

In the particular case of the precision power supply supply for supplying a single-photon superconducting detector, a current or voltage stabilization mode is provided (optional), while the current variation range in the stabilization mode is from -100 to 100 μA with a temporary stability of at least 0.1 μA, and the voltage variation range in the stabilization mode is from -100 to 100 mV with a temporary stability of at least 50 μV. The current tuning step in the stabilization mode is 0.5 and 5 μA, respectively, for smooth and coarse current adjustment. The voltage tuning step in the stabilization mode is 50 and 500 μV, respectively, for smooth and coarse voltage adjustment.

Thus, the claimed source of precision power allows you to increase the accuracy and stability of the power of the connected external device while reducing the level of pickups on it.

Claims (5)

1. A precision power source, including galvanically isolated analog and digital parts of the power source, while the analog part includes a bias source for setting the required current value and ensuring the current stabilization mode, a power adapter for decoupling the power of the connected external device and the electrical signal removed from it, an amplifier for recording the signal from the external device, and an auto-reset system for stabilizing the output parameters of the power sources with a rapidly changing internal resistance to external load, the digital part includes a microcontroller to control the bias source, a control panel and a display to enable the user to set the required current value on the bias source, and a unit for connecting a personal computer to the power source, the analog part is powered from the battery and from the network adapter, it is possible to supply a regulated and stabilized current value to the external device that is constant in time with simultaneous registration of the signal from the external device. 2. The precision power supply according to claim 1, characterized in that the device uses an auto-reset system to automatically return the superconducting single-photon detector to operating mode.

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