RF switch module

Abstract

The utility model relates to the technical field of radio frequency switches, and specifically to a radio frequency switch module, including a radio frequency switch, a controller, and a logic judgment circuit. The controller uses the logic judgment circuit to accurately control the on and off state of the radio frequency switch. If the controller fails and the control signal output by the controller cannot correctly switch the radio frequency switch, the logic judgment circuit will maintain the previous channel switching standard to ensure that the radio frequency switch maintains the previous channel state. The utility model solves the technical problem that the radio frequency switch can still maintain the previous channel state when the controller fails.

Description

Technical Field

[0001] The utility model relates to the technical field of radio frequency switches, and in particular to a radio frequency switch module. Background Art

[0002] An RF switch is a module used to switch signal paths in RF circuits. It can select, connect or disconnect signals in different RF circuits to meet various communication needs. Existing RF switches are generally controllable RF switches, which precisely control the on and off states of RF channels by outputting positive and negative voltages through a controller, so as to achieve high-speed channel switching while ensuring low signal loss and high-quality transmission.

[0003] However, when the controller fails, it may not be able to provide stable voltage control signals to the RF switch. Since the RF switch relies on these voltage signals to switch and maintain channels, the failure of the controller will directly interfere with the normal operation of the RF switch, resulting in communication interruption or signal quality degradation, or more seriously, damage to the RF switch.

[0004] Therefore, it is extremely important to solve the problem of how to ensure that the RF switch can maintain the previous channel state when the controller fails. Utility Model Content

[0005] The purpose of the present application is to provide a radio frequency switch module, which solves the technical problem that the radio frequency switch can still maintain the previous channel state when the controller fails.

[0006] In order to solve the above technical problems, the solution adopted by this application is as follows:

[0007] The utility model provides a radio frequency switch module, comprising a radio frequency switch and a controller connected to the radio frequency switch, characterized in that: it also comprises a logic judgment circuit, the controller controls the on and off of the radio frequency switch through the logic judgment circuit, the input end of the logic judgment circuit is connected to the output end of the controller, and the output end is connected to the control end of the radio frequency switch; the logic judgment circuit comprises a first control circuit and a second control circuit;

[0008] The first control circuit includes a first trigger, a first AND gate, and a first NOT gate. An input end of the first AND gate is connected to a signal receiving end of the first trigger, and the input end is set here as an input end of a logic judgment circuit; the input end of the first NOT gate is used as two input ends of the logic judgment circuit, and the output end of the first NOT gate is connected to the two input ends of the first AND gate; the output end of the first AND gate is connected to the clock end of the first trigger; the signal output end of the first trigger is set as an output end of the logic judgment circuit;

[0009] The second control circuit includes a second trigger, a second AND gate, and a second NOT gate. An input end of the second AND gate, a signal receiving end of the second trigger, and an input end of the first NOT gate are connected; an input end of the second NOT gate is connected to an input end of the first AND gate, and an output end of the second NOT gate is connected to two input ends of the second AND gate; an output end of the second AND gate is connected to a clock end of the second trigger; and a signal output end of the second trigger is set as the second output end of the logic judgment circuit.

[0010] In some embodiments, the power supply terminal of the first trigger and the power supply terminal of the second trigger are connected and connected to a power source.

[0011] In some embodiments, the power supply terminals of the first trigger and the second trigger are further connected to delay capacitors.

[0012] In some embodiments, the reset terminal of the first trigger and the reset terminal of the second trigger are connected to a power supply; the ground terminal of the first trigger and the ground terminal of the second trigger are connected to ground.

[0013] In some embodiments, the RF switch includes a first RF switch and a second RF switch, wherein the two control ends of the first RF switch are respectively connected to an output end of two sets of logic judgment circuits; the two control ends of the second RF switch are respectively connected to two output ends of two sets of logic judgment circuits.

[0014] In some embodiments, the input end of the first RF switch is connected to the input end of the second RF switch, and the input end is set here as the total input end of the RF switch; the output end of the first RF switch is used as an output end of the RF switch, and the output end of the second RF switch is used as a second output end of the RF switch.

[0015] In some embodiments, the first trigger and the second trigger are both D triggers, and the model of the D trigger is SN74LVC1G175DCKR.

[0016] The technical solution of the present application has at least the following advantages and beneficial effects:

[0017] In the utility model, the controller uses a logic judgment circuit to accurately control the on and off state of the radio frequency switch. If the controller fails and the control signal it outputs cannot correctly switch the radio frequency switch, the logic judgment circuit will maintain the previous channel switching standard to ensure that the radio frequency switch maintains the previous channel state, thereby effectively avoiding channel switching accidents caused by controller failures and ensuring the stability and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a radio frequency switch circuit diagram of the utility model;

[0019] Figure 2 This is a logic judgment circuit diagram of the utility model. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in the subsequent figures. If the terms "center", "upper", "lower", "inner", "outer", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the figure, or the orientation or position relationship in which the product of the application is usually placed when in use, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. It should also be noted that unless otherwise clearly specified and limited, if the terms "set", "install", and "connect" appear, they 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, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] Example 1

[0023] Please refer to Figure 1-Figure 2 The utility model provides a radio frequency switch module, which is the same as the prior art, and includes a radio frequency switch and a controller connected to the radio frequency switch, and the controller is used to control the switching of the radio frequency switch.

[0024] Different from the prior art, it also includes a logic judgment circuit, and the controller controls the on and off of the radio frequency switch through the logic judgment circuit. The input end of the logic judgment circuit is connected to the output end of the controller, and its output end is connected to the control end of the radio frequency switch. In this embodiment, two sets of logic judgment circuits are provided;

[0025] Furthermore, if Figure 2As shown, the logic judgment circuit includes a first trigger U1, a first AND gate U3, a first NOT gate U5, a second trigger U5, a second AND gate U4, a second NOT gate U6, and a delay capacitor C7; the delay capacitor C7 not only has a delay function, but also has a filtering function;

[0026] It should be noted that, in this embodiment, the first trigger U1 and the second trigger U2 are both D triggers, and the model of the D trigger is SN74LVC1G175DCKR;

[0027] Specifically, in the logic judgment circuit, the VCC terminal of the first trigger U1, the VCC terminal of the second trigger U2, and one end of the delay capacitor C7 are connected and connected to the power supply, and the other end of the delay capacitor C7 is grounded; the CLR# terminal of the first trigger U1 and the CLR# terminal of the second trigger U2 are connected and connected to the power supply; the Q terminal of the first trigger U1 is a signal output terminal, which is set as an output terminal of the logic judgment circuit, and is called the OUT1 output terminal for the convenience of description; the Q terminal of the second trigger U2 is a signal output terminal, which is set as the second output terminal of the logic judgment circuit, and is called the OUT2 output terminal for the convenience of description; the GND terminal of the first trigger U1 is connected to the GND terminal of the second trigger U2 and is grounded; the C The LK terminal is connected to the output terminal of the first AND gate U3, an input terminal of the first AND gate U5, the D terminal of the first trigger U1, and the input terminal of the second NOT gate U6 are connected, and the input terminal is set here as an input terminal of the logic judgment circuit, for the convenience of description, it is called the IN1 input terminal; the two input terminals of the first AND gate U3 are connected to the output terminal of the first NOT gate U5, the input terminal of the first NOT gate U5, an input terminal of the second AND gate U4, and the D terminal of the second trigger U2 are connected, and the input terminal is set here as the two input terminals of the logic judgment circuit, for the convenience of description, it is called the IN2 input terminal; the output terminal of the second NOT gate U6 is connected to the two input terminals of the second AND gate U4, and the output terminal of the second AND gate U4 is connected to the CLK terminal of the second trigger U2.

[0028] Specifically, when the logic judgment circuit is in a working state, that is, when the power supply is not cut off, if the IN1 input terminal and the IN2 input terminal receive a high level or a low level at the same time, it can be determined that the controller has failed, and the logic judgment circuit maintains the previous channel state; if the IN1 input terminal and the IN2 input terminal receive different levels respectively, the controller is in a normal working state, and the logic judgment circuit controls the channel switching according to the signal transmitted by the controller.

[0029] It should be noted that when the RF switch is normally turned off, that is, when the power is turned off, the VCC terminal of the first trigger U1 is turned off with a delay. At the moment of power off, the CLR# terminal of the first trigger U1 is at a low level. At this time, the trigger is reset and the output terminal is at a low level. This processing method can ensure that the trigger U1 enters a stable and safe state before the power is completely turned off. The second trigger U2 operates the same as the first trigger U1 under normal shutdown conditions.

[0030] In this embodiment, the RF switch includes a first RF switch and a second RF switch, wherein two control ends of the first RF switch are respectively connected to one output end of two sets of logic judgment circuits; and two control ends of the second RF switch are respectively connected to two output ends of two sets of logic judgment circuits.

[0031] Furthermore, if Figure 1 As shown, the RF switch in this embodiment includes diodes D1, D2, D3, and D4, capacitors C1, C2, C3, C4, C5, and C6, and inductors L1, L2, L3, L4, L5, L6, L7, L8, L9, L10, and L11;

[0032] The first RF switch includes diodes D1 and D3, capacitors C1, C2 and C5, and inductors L2, L3, L6, L7 and L10; the anode of the diode D1 is the input end of the first RF switch, and the anode of the diode D3 is the output end of the first RF switch;

[0033] The second RF switch includes diodes D2 and D4, capacitors C3, C4 and C5, and inductors L4, L5, L8, L9 and L11; the anode of the diode D2 is the input terminal of the second RF switch, and the anode of the diode 43 is the output terminal of the second RF switch.

[0034] Specifically, in the RF switch, one end of the inductor L1, the positive electrode of the diode D1, and the negative electrode of the diode D2 are connected, and an input end is set here as the total input end of the RF switch, which is called the J0 input end for the convenience of description; the other end of the inductor L1 is grounded; the negative electrode of the diode D1, one end of the inductor L3, and one end of the capacitor C2 are connected, the other end of the inductor L3, one end of the inductor L2, and one end of the capacitor C1 are connected, and the other end of the inductor L2 is set as a control input end, which is called the E1 input end for the convenience of description; the other end of the capacitor C1 is grounded; the other end of the capacitor C2, one end of the inductor L7, and the negative electrode of the diode D3 are connected, the other end of the inductor L7, one end of the inductor L6, and one end of the capacitor C5 are connected, and the other end of the inductor L6 is set as a second control input end, which is called the E2 input end for the convenience of description; the other end of the capacitor C5 is grounded; the positive electrode of the diode D3, the inductor L1 0 is connected and an output terminal is set here as an output terminal of the RF switch, which is called J1 output terminal for the convenience of description; the cathode of the diode D2, one end of the inductor L4, and one end of the capacitor C3 are connected, the other end of the inductor L4, one end of the inductor L5, and one end of the capacitor C4 are connected, and the other end of the inductor L5 is set as the third control input terminal, which is called E3 input terminal for the convenience of description; the other end of the capacitor C4 is grounded; the other end of the capacitor C32, one end of the inductor L8, and the cathode of the diode D4 are connected, the other end of the inductor L8, one end of the inductor L9, and one end of the capacitor C6 are connected, and the other end of the inductor L9 is set as the fourth control input terminal, which is called E4 input terminal for the convenience of description; the other end of the capacitor C6 is grounded; the anode of the diode D4 and one end of the inductor L11 are connected and an output terminal is set here as the second output terminal of the RF switch, which is called J2 output terminal for the convenience of description.

[0035] It should be noted that, in the RF switch, channel J0-J1 is the first RF switch, and channel J0-J2 is the second RF switch; the E1 input terminal and the E3 input terminal are a group of control terminals, and the E2 input terminal and the E4 input terminal are two groups of control terminals, and the two groups of control terminals receive the control voltage and work at the same time;

[0036] In the logic judgment circuit, the IN1 input terminal and the IN2 input terminal are respectively connected to different pins of the controller; each group of control terminals is configured with a logic judgment circuit, and the OUT1 output terminal and the OUT2 output terminal in a logic judgment circuit are respectively connected to two input ports in a group of control terminals through a voltage source, that is, the OUT1 output terminal and the OUT2 output terminal in one logic judgment circuit are respectively connected to the E1 input terminal and the E3 input terminal of one group of control terminals, and the OUT1 output terminal and the OUT2 output terminal in another group of logic judgment circuits are respectively connected to the E2 input terminal and the E4 input terminal of the two groups of control terminals.

[0037] It should be noted that the OUT1 output terminal and the OUT2 output terminal in a logic judgment circuit output a high level or a low level respectively, thereby controlling the voltage source to output a positive voltage or a negative voltage to the corresponding input terminal, so as to control the on and off state of the RF switch, that is, the OUT1 output terminal of a group of logic judgment circuits outputs a high level, and the OUT2 output terminal must be a low level at this time. The voltage source outputs a positive voltage to the E1 input terminal of a group of control terminals and outputs a negative voltage to the E3 input terminal according to the high and low levels; the control principle of the other group of logic judgment circuits for the two groups of control terminals is the same as the control principle of a group of logic judgment circuits for a group of control terminals.

[0038] When the E1 input terminal is negative, and the E2 input terminal is also negative, the diode D1 and the diode D3 are turned on, and the first RF switch, that is, the channel J0-J1 is turned on; when the E1 input terminal is positive, and the E2 input terminal is also positive, the diode D1 and the diode D3 are turned off, and the first RF switch, that is, the channel J0-J1 is closed. The switching principle of the second RF switch, that is, the channel J0-J2, is the same as that of the first RF switch.

[0039] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution of the present invention, and the scope of the present invention is defined by the attached claims.

Claims

1. A radio frequency switch module, comprising a radio frequency switch and a controller connected to the radio frequency switch, characterized in that: It also includes a logic judgment circuit, the controller controls the on and off of the radio frequency switch through the logic judgment circuit, the input end of the logic judgment circuit is connected to the output end of the controller, and the output end is connected to the control end of the radio frequency switch; the logic judgment circuit includes a first control circuit and a second control circuit; The first control circuit includes a first trigger, a first AND gate, and a first NOT gate. An input end of the first AND gate is connected to a signal receiving end of the first trigger, and the input end is set here as an input end of a logic judgment circuit; the input end of the first NOT gate is used as two input ends of the logic judgment circuit, and the output end of the first NOT gate is connected to the two input ends of the first AND gate; the output end of the first AND gate is connected to the clock end of the first trigger; the signal output end of the first trigger is set as an output end of the logic judgment circuit; The second control circuit includes a second trigger, a second AND gate, and a second NOT gate. An input end of the second AND gate, a signal receiving end of the second trigger, and an input end of the first NOT gate are connected; an input end of the second NOT gate is connected to an input end of the first AND gate, and an output end of the second NOT gate is connected to two input ends of the second AND gate; an output end of the second AND gate is connected to a clock end of the second trigger; and a signal output end of the second trigger is set as the second output end of the logic judgment circuit.

2. The radio frequency switch module according to claim 1, characterized in that: The power supply end of the first trigger and the power supply end of the second trigger are connected and connected to the power supply.

3. The radio frequency switch module according to claim 2, characterized in that: The power supply terminals of the first trigger and the second trigger are also connected with delay capacitors.

4. The radio frequency switch module according to claim 1, characterized in that: The reset end of the first trigger is connected to the reset end of the second trigger and is connected to a power supply; the ground end of the first trigger is connected to the ground end of the second trigger and is grounded.

5. The radio frequency switch module according to claim 1, characterized in that: The RF switch includes a first RF switch and a second RF switch. The two control ends of the first RF switch are respectively connected to an output end of two sets of logic judgment circuits; the two control ends of the second RF switch are respectively connected to two output ends of two sets of logic judgment circuits.

6. The radio frequency switch module according to claim 5, characterized in that: The input end of the first RF switch is connected to the input end of the second RF switch, and the input end is set here as the total input end of the RF switch; the output end of the first RF switch is used as an output end of the RF switch, and the output end of the second RF switch is used as a second output end of the RF switch.

7. The radio frequency switch module according to claim 1, characterized in that: The first trigger and the second trigger are both D triggers, and the model of the D trigger is SN74LVC1G175DCKR.

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