Prompt circuit for indicating connection state of radio frequency coaxial switch

Abstract

The utility model discloses a prompt circuit used for indicating connection states of radio frequency coaxial switches, comprising a bidirectional conversion circuit connected with a PXI cabinet backboard module through a PXI connector, an FPGA controller, a plurality of radio frequency coaxial switches and an LED indication circuit, the automatic bidirectional conversion circuit, the LED indication circuit and the plurality of radio frequency coaxial switches are respectively in communication connection with the FPGA, and the FPGA controller is used for detecting the power-on states of the radio frequency coaxial switches and outputting corresponding high and low levels according to the power-on states to control the states of the LED indication lamps corresponding to the radio frequency coaxial switches. According to the power-on state of the radio frequency coaxial switch, the corresponding high and low levels are output according to the power-on state to control the LED indicating lamp corresponding to the radio frequency coaxial switch, the power-on state of the radio frequency coaxial switch is prompted, and the power-on state of the radio frequency coaxial switch is visually observed.

Description

Technical Field

[0001] The utility model relates to the technical field of status indication circuits, and particularly relates to a prompt circuit for indicating the connection status of a radio frequency coaxial switch. Background Technique

[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 stable PC-based 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, a communication circuit for completing the communication between PCI and FPGA, and a switch control circuit for controlling the opening or closing of the corresponding radio frequency coaxial switch. However, the user cannot directly observe whether the radio frequency coaxial switch is powered on. If it is not powered on, the radio frequency coaxial switch cannot receive the control command sent by the FPGA. Since a PXI switch module will set multiple radio frequency coaxial switches at the same time and it is necessary to check the power-on status of all radio frequency coaxial switches, it is very important to set up a circuit that can indicate the power-on status of the switch. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a prompt circuit for indicating the connection status of a radio frequency coaxial switch. By detecting the power-on status of the radio frequency coaxial switch and outputting corresponding high and low levels according to the power-on status to control the LED indicator corresponding to the radio frequency coaxial switch, the power-on status of the radio frequency coaxial switch is prompted, and the power-on status of the radio frequency coaxial switch can be visually observed.

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

[0006] A prompt circuit for indicating the connection status of a radio frequency coaxial switch includes a bidirectional conversion circuit, an FPGA controller, several radio frequency coaxial switches, and an LED indication circuit, which are connected to the PXI chassis backplane module through a PXI connector, wherein;

[0007] The automatic bidirectional conversion circuit, the LED indication circuit, and several radio frequency coaxial switches are respectively connected to the FPGA for communication. The FPGA controller is used to detect the power-on status of the radio frequency coaxial switch and output corresponding high and low levels to control the status of the LED indicator corresponding to the radio frequency coaxial switch.

[0008] In some alternative embodiments, it further includes a first power supply module for providing a 5V power supply to the bidirectional conversion circuit and the FPGA controller, and a power conversion module for converting the 5V power supply into a 3V3 power supply. The power conversion module provides the 3V3 power supply to the bidirectional conversion circuit.

[0009] In some alternative embodiments, the bidirectional conversion circuit is used to perform bidirectional conversion on the interface transmission direction between the FPGA controller and the PXI chassis backplane module.

[0010] In some alternative embodiments, the bidirectional conversion circuit includes a first bidirectional conversion circuit and a second bidirectional conversion circuit. The number of the first bidirectional conversion circuits corresponds to the number of the radio frequency coaxial switches, and is used to convert the bidirectional transmission signals between the FPGA controller and the PXI chassis backplane module. The second bidirectional conversion circuit is used to transmit the configuration signal data between the FPGA controller and the PXI chassis backplane module.

[0011] In some alternative embodiments, the bidirectional conversion circuits all adopt the 8-bit converter chip TXB0108PWR.

[0012] In some alternative embodiments, the FPGA controller adopts the dual backplane control chips of ZYNQ7010 and 7020.

[0013] In some alternative embodiments, the radio frequency coaxial switch is communicatively connected to the FPGA controller through a JTAG connector.

[0014] In some alternative embodiments, the PXI connector adopts the 354142CPCI J1 connector.

[0015] Advantages of the present utility model:

[0016] A prompting circuit for indicating the connection state of a radio frequency coaxial switch according to the present utility model. 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 LED indicator lights corresponding to the radio frequency coaxial switches, so as to prompt the power-on states of the radio frequency coaxial switches. When it detects that the power interface of the corresponding radio frequency coaxial switch is powered on and connected, it outputs a high level to the LED indicating circuit to make the LED indicator light corresponding to the radio frequency coaxial switch light up, providing a prompt for the user to intuitively observe the power-on state of the radio frequency coaxial switch. Description of the drawings

[0017] Figure 1 It is a functional connection diagram of the prompting circuit for indicating the connection state of a radio frequency coaxial switch provided by an embodiment of the present utility model;

[0018] Figure 2Schematic diagram of pin connection of the PXI connector provided by the embodiment of the present utility model;

[0019] Figure 3 Schematic diagram of the bi-directional conversion circuit provided by the embodiment of the present utility model;

[0020] Figure 4 Schematic diagram of pin connection of the FPGA controller provided by the embodiment of the present utility model;

[0021] Figure 5 Schematic diagram of the circuit of the power conversion module provided by the embodiment of the present utility model;

[0022] Figure 6 Schematic diagram of the circuit of the first power module provided by the embodiment of the present utility model. Detailed implementation manners

[0023] The present utility model will be further described in detail below in conjunction with embodiments and the accompanying drawings, but the implementation manners of the present utility model are not limited thereto.

[0024] 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.

[0025] 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 internal communication of 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.

[0026] The present utility model will be described in detail below by referring to the drawings and in conjunction with embodiments:

[0027] Embodiment 1:

[0028] As Figure 1As shown in the figure, this embodiment provides a prompting circuit for indicating the connection state of a radio frequency coaxial switch, including a bidirectional conversion circuit, an FPGA controller, several radio frequency coaxial switches, and an LED indication circuit that are connected to the PXI chassis backplane module through a PXI connector, where;

[0029] The automatic bidirectional conversion circuit, the LED indication circuit, and several radio frequency coaxial switches are respectively communicatively connected to the FPGA. The FPGA controller is used to detect the power-on state of the radio frequency coaxial switch and output corresponding high and low levels to control the state of the LED indicator corresponding to the radio frequency coaxial switch.

[0030] Specifically, since the power supply output by the chassis backplane module is 5V, and the operating voltage of the PFGA data transmission interface is 3V3, therefore, in this embodiment, the power supply includes a first power supply module that converts 12V to 5V, as Figure 6 shown, the J3 connector is used to connect an external 12V power supply. The first power supply module uses a TPS54331DR power conversion chip to convert the externally connected 12V power supply into a 5V power board; and a first power supply module that provides 5V power for the bidirectional conversion circuit and the FPGA controller, and a power conversion module that converts the 5V power into 3V3 power. The power conversion module provides 3V3 power for the bidirectional conversion circuit. As Figure 5 shown, the circuit connection method of the power conversion module that converts 5V power into 3V3 power is that the VIN pin of the DC-DC conversion chip is connected to the 5V voltage output by the first power supply module, and the VOUT pin outputs 3V3 power.

[0031] Specifically, in this embodiment, the bidirectional conversion circuit is used to perform bidirectional conversion on the interface transmission direction between the FPGA controller and the PXI chassis backplane module. The bidirectional conversion circuit includes two types of first bidirectional conversion circuits and second bidirectional conversion circuits. The number of the first bidirectional conversion circuits corresponds to the number of radio frequency coaxial switches and is used to convert the bidirectional transmission signals between the FPGA controller and the PXI chassis backplane module. The second bidirectional conversion circuit is used to transmit the configuration signal data between the FPGA controller and the PXI chassis backplane module. As Figure 3As shown in the figure, seven bidirectional conversion circuits all use the 8-bit converter chip TXB0108PWR. The component of model TXB0108PWR is an 8-bit non-inverting converter, which adopts two independent configurable power rails. This device has Ioff to support operation in the semi-off mode. The Ioff circuit disables the output to prevent damage during power-off. In automatic instrumentation equipment and automatic control systems, TXB0108PWR is used to convert one signal into another signal after comparison with a standard quantity or reference quantity, so as to connect the FPGA controller and the PXI chassis backplane module. The two independent configurable power rails are 3V3 and 5V3 respectively, which enables this device to perform general low-voltage bidirectional conversion arbitrarily between the 3.V3 and 5V voltage nodes.

[0032] Specifically, as Figure 2 shown, the FPGA controller of this embodiment adopts the dual-backplane control chips of ZYNQ7010 and 7020, and the connection relationship of its chip interface pins is as Figure 2 shown. The radio frequency coaxial switch is communicatively connected to the FPGA controller through a JTAG connector.

[0033] As Figure 4 shown, the PXI connector adopts the 354142CPCI J1 connector, and the connection structure of the PXI connector connecting the backplane module and the bidirectional conversion circuit is as Figure 4 shown.

[0034] The working principle of this embodiment is as follows:

[0035] In order to enable signal transmission between the FPGA controller and the PXI chassis backplane module under the corresponding voltage, after inserting an external 12V power supply, the first power module converts the external 12V power supply into a 5V power supply to provide power for each chip. In addition, in order to provide two power supplies of 5V and 3V3 for the bidirectional conversion circuit, it is also necessary to convert the 5V power supply into a 3V3 power supply through a power conversion module. When there is a radio frequency coaxial switch connected to the FPGA controller through a JTAG connector, the FPGA detects that a radio frequency coaxial switch is connected, and then outputs a high level to the LED indicator circuit corresponding to the radio frequency coaxial switch to control the LED indicator corresponding to the radio frequency coaxial switch to light up, indicating that the radio frequency coaxial switch has been successfully powered on and connected. In this application, there are multiple radio frequency coaxial switches, so there are multiple LED indicators, and the radio frequency coaxial switches and the LED indicators are in one-to-one correspondence.

[0036] It can be understood that the above embodiments are only exemplary embodiments adopted to illustrate the principle of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various deformations and improvements can be made without departing from the spirit and essence of the present invention, and these deformations and improvements are also regarded as the protection scope of the present invention.

Claims

1. A prompting circuit for indicating the connection state of a radio frequency coaxial switch, characterized in that It includes a bidirectional conversion circuit, an FPGA controller, several RF coaxial switches, and an LED indication circuit that are connected to the PXI chassis backplane module through a PXI connector, where; The automatic bidirectional conversion circuit, the LED indication circuit, and several RF coaxial switches are respectively connected to the FPGA for communication. 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 LED indicator corresponding to the RF coaxial switch.

2. The prompting circuit for indicating the connection state of a radio frequency coaxial switch according to claim 1, wherein It further includes a first power supply module that provides a 5V power supply for the bidirectional conversion circuit and the FPGA controller, and a power conversion module that converts the 5V power supply into a 3V3 power supply. The power conversion module provides a 3V3 power supply for the bidirectional conversion circuit.

3. The prompting circuit for indicating the connection state of a radio frequency coaxial switch according to claim 1, wherein The bidirectional conversion circuit is used to perform bidirectional conversion on the interface transmission direction between the FPGA controller and the PXI chassis backplane module.

4. The prompting circuit for indicating the connection state of a radio frequency coaxial switch according to claim 1, characterized in that, The bidirectional conversion circuit includes a first bidirectional conversion circuit and a second bidirectional conversion circuit. The number of the first bidirectional conversion circuits corresponds to the number of RF coaxial switches and is used to convert the bidirectional transmission signals between the FPGA controller and the PXI chassis backplane module. The second bidirectional conversion circuit is used to transmit the configuration signal data between the FPGA controller and the PXI chassis backplane module.

5. The prompting circuit for indicating the connection state of a radio frequency coaxial switch according to claim 4, wherein The bidirectional conversion circuits all adopt the 8-bit converter chip TXB0108PWR.

6. The prompting circuit for indicating the connection state of a radio frequency coaxial switch according to claim 2, wherein The FPGA controller adopts a dual backplane control chip of ZYNQ7010 and 7020.

7. The prompting circuit for indicating the connection state of a radio frequency coaxial switch according to claim 3, wherein, The RF coaxial switch is communicatively connected to the FPGA controller through a JTAG connector.

8. The prompt circuit for indicating the connection state of a radio frequency coaxial switch according to claim 3, wherein The PXI connector adopts a 354142CPCI J1 connector.

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