Power switching circuit for radio frequency coaxial switch

Abstract

The utility model discloses a power supply switching circuit used for a radio frequency coaxial switch, an FPGA controller is in communication connection with the radio frequency coaxial switch through a level conversion module, and a switch switching module is used for switching a first power supply module and a second power supply module, so that the first power supply module or the second power supply module supplies power to the radio frequency coaxial switch. A switch switching module is arranged for the radio frequency coaxial switch, so that the power supply voltage of the radio frequency coaxial switch is switched.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuit design, and particularly relates to a power supply switching circuit for a radio frequency coaxial switch. Background Art

[0002] In a PXI chassis, a PXI switch module compatible with the PXI specification can be installed. PXI (PCIe Extensions for Instrumentation) is an extension of PCI in the field of instruments. PXI (PCI extension for instrumentation) is a PC-based stable platform for measurement and automation systems. PXI integrates the speed and performance of the PCI bus with advanced timing and synchronization features in a stable, modular CompactPCI Eurocard package.

[0003] The PXI switch module includes a radio frequency coaxial switch, and the radio frequency coaxial switch can access different operating voltages. Therefore, a switching circuit is required to facilitate the switching of the voltage applied to the radio frequency coaxial switch. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a power supply switching circuit for a radio frequency coaxial switch, which switches the power supply voltage of the radio frequency coaxial switch by setting a switch switching module for the radio frequency coaxial switch.

[0005] To solve the above technical problems, the utility model adopts the following solutions:

[0006] A power supply switching circuit for a radio frequency coaxial switch includes an FPGA controller, a level conversion module, a switch switching module, and a plurality of radio frequency coaxial switches, wherein;

[0007] The FPGA controller is communicatively connected to the radio frequency coaxial switch through the level conversion module, and the switch switching module is used to switch between a first power supply module and a second power supply module, so that the first power supply module or the second power supply module supplies power to the radio frequency coaxial switch.

[0008] In some optional embodiments, the number of the level conversion modules corresponds to the number of the radio frequency coaxial switches, and each level conversion module corresponds to a radio frequency coaxial switch.

[0009] In some optional embodiments, the first power supply module is a 12V power supply module.

[0010] In some optional embodiments, the second power supply module includes a 12V power supply circuit and a power conversion circuit, and the power conversion circuit converts the 12V power supply into a 5V power supply.

[0011] In some optional embodiments, it further includes a 3V power supply module for providing a 3V power supply to the level conversion module and the FPGA controller.

[0012] In some alternative embodiments, a capacitor for filtering is provided at the power input port of the 3V power module.

[0013] In some alternative embodiments, an LED circuit is further included. The LED circuit is used to receive the control signal of the FPGA controller to indicate the power-on state of the radio frequency coaxial switch.

[0014] In some alternative embodiments, a bi-directional conversion circuit is provided between the FPGA controller and the LED circuit.

[0015] In some alternative embodiments, the level conversion module uses a CD40109BPWR chip.

[0016] Advantages of the present utility model:

[0017] A power supply switching circuit for a radio frequency coaxial switch according to the present utility model sets a switch switching module for the radio frequency coaxial switch to switch the power supply voltage of the radio frequency coaxial switch.

[0018] In addition, in order to conveniently and intuitively view the power-on state of the radio frequency coaxial switch, the FPGA controller detects the power-on state of the radio frequency coaxial switch, and outputs corresponding high and low levels according to the power-on states of the radio frequency coaxial switches to control the corresponding LED circuits associated with the radio frequency coaxial switches to start, so as to prompt the power-on states of the radio frequency coaxial switches. When it is detected that the power interface of the corresponding radio frequency coaxial switch is powered on and connected, a high level is output to the LED indication circuit to cause the LED indicator corresponding to the radio frequency coaxial switch to light up, providing a prompt for the user and intuitively observing the power-on state of the radio frequency coaxial switch. Description of the drawings

[0019] Figure 1 It is a functional connection diagram of the power supply switching circuit for a radio frequency coaxial switch provided by an embodiment of the present utility model;

[0020] Figure 2 It is a schematic diagram of the pin connection of the FPGA controller provided by an embodiment of the present utility model;

[0021] Figure 3 It is a schematic diagram of the connection of the level conversion module provided by an embodiment of the present utility model;

[0022] Figure 4 It is a schematic circuit diagram of the first power module provided by an embodiment of the present utility model;

[0023] Figure 5 It is a schematic circuit diagram of the second power module provided by an embodiment of the present utility model;

[0024] Figure 6Schematic diagram of the 3V power supply module provided by the embodiment of the present utility model;

[0025] Figure 7 Schematic diagram of the LED indication circuit provided by the embodiment of the present utility model. Specific embodiments

[0026] The present utility model will be further described in detail below in conjunction with embodiments and the accompanying drawings, but the embodiments of the present utility model are not limited thereto.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0028] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "provided with", "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] The present utility model will be described in detail below by referring to the drawings and in conjunction with embodiments:

[0030] Embodiment 1:

[0031] As Figure 1 shown, this embodiment provides a power supply switching circuit for a radio frequency coaxial switch, including that the FPGA controller is communicatively connected to the radio frequency coaxial switch through a level conversion module, and the switch switching module is used to switch between the first power supply module and the second power supply module, so that the first power supply module or the second power supply module supplies power to the radio frequency coaxial switch.

[0032] As Figure 2 shown, the FPA controller transfers signals through a patch panel. Among them, the FPGA_SW interface correspondingly controls the radio frequency coaxial switch RF_SW. In this embodiment, 3 radio frequency coaxial switches (RF_SW1,

[0033] RF_SW2, RF_SW3) are taken as examples.

[0034] Correspondingly, as Figure 3 shown (taking a level conversion module as an example), assuming there are 3 RF coaxial switches, then three level conversion modules are provided. The input end of each level conversion circuit is connected to the FPGA_SW interface of the FPGA, and the output end is connected to the corresponding RF coaxial switch RF_SW interface. And each level conversion module uses two CD40109BPWR chips.

[0035] The first power supply module is a 12V power supply module. As Figure 4 shown, the J3 connector is used to connect an external 12V power supply. As Figure 5 shown, the second power supply module uses a TPS54331DR power conversion chip to convert the externally connected 12V power supply into a 5V power supply.

[0036] As Figure 6 shown, it also includes a 3V power supply module for providing a 3V power supply to the level conversion module and the FPGA controller. The power input port of the 3V power supply module is provided with a capacitor for filtering.

[0037] For the convenience of, it also includes an LED circuit. The LED circuit is used to receive the control signal of the FPGA controller to indicate the power-on state of the RF coaxial switch. As Figure 7 shown (taking an RF coaxial switch as an example, one RF coaxial switch corresponds to one bidirectional to dual conversion chip TXB0108PWR), a bidirectional conversion circuit is provided between the FPGA controller and the LED circuit. The FPGA controller is used to detect the power-on state of the RF coaxial switch and output corresponding high and low levels according to the power-on state to control the state of the corresponding indicator light in the LED circuit corresponding to the RF coaxial switch.

[0038] The working principle of this embodiment is as follows:

[0039] For the convenience of switching the working voltage of the RF coaxial switch, this embodiment uses a switch switching module (a mechanical switch can be used). When the switch is switched to the first power supply module, the 12V power supply is provided for the RF coaxial switch to work. When the switch is switched to the second power supply module, the external 12V power supply is converted into a 5V voltage and filtered to provide a 5V power supply for the RF coaxial switch. In addition, for indicating the power connection status of each RF coaxial switch. When there is an RF coaxial switch connected to the FPGA controller through the JTAG connector, the FPGA detects that an RF coaxial switch is connected, then outputs a high level to the LED circuit corresponding to the RF coaxial switch to control the corresponding LED indicator light of the RF coaxial switch to light up, indicating that the RF coaxial switch has been successfully powered on and connected. In this application, there are multiple RF coaxial switches, then there are multiple LED indicator lights, and the RF coaxial switches and the LED indicator lights are in one-to-one correspondence.

[0040] It is understandable that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present utility model. However, the present utility model is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present utility model, and these modifications and improvements are also regarded as the protection scope of the present utility model.

Claims

1. A power switching circuit for a radio frequency coaxial switch, characterized in that: It includes an FPGA controller, a level conversion module, a switch switching module, and several RF coaxial switches, among which; The FPGA controller is connected to the radio frequency coaxial switch through the level conversion module, and the switch switching module is used to switch the first power module and the second power module so that the first power module or the second power module supplies power to the radio frequency coaxial switch.

2. A power switching circuit for a radio frequency coaxial switch according to claim 1, characterized in that: The number of level conversion modules corresponds to the number of RF coaxial switches, and each level conversion module corresponds to one RF coaxial switch.

3. A power switching circuit for a radio frequency coaxial switch according to claim 1, characterized in that: The first power module is a 12V power module.

4. A power switching circuit for a radio frequency coaxial switch according to claim 1, characterized in that: The second power supply module includes a 12V power supply circuit and a power conversion circuit, and the power conversion circuit converts the 12V power supply into a 5V power supply.

5. The power switching circuit for a radio frequency coaxial switch according to claim 1, characterized in that: A 3V power supply module is also included to provide 3V power to the level conversion module and the FPGA controller.

6. The power switching circuit for a radio frequency coaxial switch according to claim 1, characterized in that: The power input port of the 3V power module is provided with a capacitor for filtering.

7. The power switching circuit for a radio frequency coaxial switch according to claim 1, characterized in that: It also includes an LED circuit, which is used to receive a control signal from the FPGA controller to indicate the power-on state of the radio frequency coaxial switch.

8. The power switching circuit for a radio frequency coaxial switch according to claim 7, characterized in that: A bidirectional conversion circuit is provided between the FPGA controller and the LED circuit.

9. The power switching circuit for a radio frequency coaxial switch according to claim 1, characterized in that: The level conversion module uses the CD40109BPWR chip.

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