High-reliability stable PIN tube switching device

Abstract

The utility model relates to the field of communication, and more specifically relates to a highly reliable and stable PIN tube switching device. The circuit comprises a PIN tube switch switching circuit; a PIN tube bias circuit; a PIN tube reverse isolation circuit; a power supply circuit; the relay switching device is used for solving the technical problems that a mechanical relay switching device is large in size, large in weight, long in switching time, large in insertion loss and short in electrical service life, and potential safety hazards are easily caused by contact ignition during switching. The PIN tube has the advantages of long electrical service life, high response speed, short conduction time, small size, light weight, low loss and the like, so that the reliability and the stability of the PIN tube switching device product are improved; the PIN tube reverse crosstalk of the change-over switch device in the switching process is eliminated through the PIN tube reverse isolation circuit, and bias compensation is carried out on the PIN tube according to the real-time condition when the PIN tube works so as to enhance the stability, the anti-interference performance and the reliability of the PIN tube switch device.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication field more particularly, relate to a kind of high-reliability stable PIN tube switch device. BACKGROUND

[0002] In the existing communication system, the link switch switching technology is mostly using traditional mechanical relay for switching, but these traditional mechanical relay switch devices have the physical defects of large size, heavy weight, etc., and also have the shortcomings of long switching time, large insertion loss, short electrical life, etc., and there are also safety hazards of contact sparking during switching. In the field of radio frequency communication, there are also problems of large insertion loss, large return loss and small isolation.

[0003] The purpose of the present application is to provide a high-reliability stable PIN tube radio frequency switching switch device, which is committed to solving the various shortcomings and hazards of traditional mechanical relay switch devices, thereby improving the reliability and stability of the product. SUMMARY

[0004] The utility model aims at overcoming at least one defect (deficiency) of the above prior art, providing a high-reliability stable PIN tube switch device, to solve the technical problems of large size, heavy weight, long switching time, large insertion loss, short electrical life and safety hazards caused by contact sparking during switching of mechanical relay switch devices.

[0005] The technical scheme adopted by the utility model is to provide a high-reliability stable PIN tube switch device, which comprises: a PIN tube switch switching circuit for controlling the output of PIN tube switch switching signal; a PIN tube bias circuit connected between the PIN tube switch switching circuit and the power supply circuit, which controls the PIN tube switch switching circuit by changing the control level of the PIN tube bias circuit to realize the switching of the output port; a PIN tube reverse isolation circuit connected between the PIN tube switch switching circuit and the power supply circuit, which is used to eliminate the PIN tube reverse crosstalk of the PIN tube switch switching circuit before and after switching; the PIN tube reverse isolation circuit is also connected between the PIN tube bias circuit and the power supply circuit, and performs static bias compensation on the PIN tube bias circuit according to real-time conditions when the PIN tube is working; a power supply circuit for providing power supply for the PIN tube bias circuit and the PIN tube reverse isolation circuit.

[0006] The AC signal is amplified by the PIN tube biasing circuit, the output voltage is changed, the PIN tube switching circuit is controlled by changing the control level of the PIN tube biasing circuit, and the switching of the output port is realized; the PIN tube reverse isolation circuit is used to eliminate the PIN tube reverse crosstalk of the transmission signal before and after the PIN tube switches the radio frequency link signal, and the PIN tube biasing circuit is statically biased and compensated according to the real-time situation when the PIN tube works, and the compensation is adjusted in real time to ensure that the PIN tube can work stably and reliably in any working environment.

[0007] Further, the PIN tube reverse isolation circuit comprises a reverse protection circuit and a static bias compensation circuit, the reverse protection circuit comprises a voltage boosting circuit, the output end of the voltage boosting circuit is connected to the static bias compensation circuit and the PIN tube switching circuit, the input end of the voltage boosting circuit is connected to the power supply circuit, the output end of the static bias compensation circuit is connected to the PIN tube biasing circuit and the PIN tube switching circuit, and the input end of the static bias compensation circuit is connected to the voltage boosting circuit and the power supply circuit.

[0008] The voltage boosting circuit is used to boost the low voltage provided by the power supply circuit to a high voltage, so as to provide an isolation voltage for PIN forward and reverse switching control, and ensure that there is a high and stable reverse protection voltage when the PIN tube is turned on or turned off; the static compensation circuit is used to adjust and compensate the static working state of the PIN tube in real time, provide a stable current for the PIN tube to work stably, and ensure that a stable and reliable current source drives the PIN tube to turn on or turn off, thereby improving the stability and reliability of the PIN tube in actual application.

[0009] Further, the static bias compensation circuit comprises a first constant current source and a second constant current source, the input ends of the first constant current source and the second constant current source are connected to the power supply circuit and the voltage boosting circuit, and the output ends of the first constant current source and the second constant current source are connected to the PIN tube biasing circuit and the PIN tube switching circuit.

[0010] The parallel connection of the two constant current sources can avoid the failure of a single constant current source to provide a stable current, thereby improving the stability and reliability of the static bias compensation circuit.

[0011] Further, the PIN tube switching circuit comprises one input port and two output ports, each input port or output port is connected in series with a capacitor and is provided with a control port, and the input signal of the PIN tube is switched to different output ports for signal output by changing the state of the control port.

[0012] The DC signal is isolated by the capacitor connected in series with the input port or the output port, and whether the AC signal passes through the capacitor connected in series with the input port or the output port is controlled by the on or off of the control port.

[0013] Further, the output port comprises an output port 1 and an output port 2, and the input port and the output port 1 are connected in sequence with a capacitor C1, a control terminal 1, a PIN tube D2, a control terminal 2, and a capacitor C3, and the input port and the output port 2 are connected in sequence with a capacitor C1, a control terminal 1, a PIN tube D1, a control terminal 3, and a capacitor C2.

[0014] Further, the output port comprises an output port 1 and an output port 2, and the input port and the output port 1 are connected in sequence with a capacitor C1, a control terminal 1, a PIN tube D2, a control terminal 2, and a capacitor C3, and the input port and the output port 2 are connected in sequence with a capacitor C1, a control terminal 1, a PIN tube D1, a control terminal 3, and a capacitor C2.

[0015] Further, the output port comprises an output port 1 and an output port 2, and the input port and the output port 1 are connected in sequence with a capacitor C1, a control terminal 1, a PIN tube D2, a control terminal 2, and a capacitor C3, and the input port and the output port 2 are connected in sequence with a capacitor C1, a control terminal 1, a PIN tube D1, a control terminal 3, and a capacitor C2.

[0016] Further, the output port comprises an output port 1 and an output port 2, and the input port and the output port 1 are connected in sequence with a capacitor C1, a control terminal 1, a PIN tube D2, a control terminal 2, and a capacitor C3, and the input port and the output port 2 are connected in sequence with a capacitor C1, a control terminal 1, a PIN tube D1, a control terminal 3, and a capacitor C2.

[0017] Further, the output port comprises an output port 1 and an output port 2, and the input port and the output port 1 are connected in sequence with a capacitor C1, a control terminal 1, a PIN tube D2, a control terminal 2, and a capacitor C3, and the input port and the output port 2 are connected in sequence with a capacitor C1, a control terminal 1, a PIN tube D1, a control terminal 3, and a capacitor C2.

[0018] Further, the output port comprises an output port 1 and an output port 2, and the input port and the output port 1 are connected in sequence with a capacitor C1, a control terminal 1, a PIN tube D2, a control terminal 2, and a capacitor C3, and the input port and the output port 2 are connected in sequence with a capacitor C1, a control terminal 1, a PIN tube D1, a control terminal 3, and a capacitor C2.

[0019] Further, the output port comprises an output port 1 and an output port 2, and the input port and the output port 1 are connected in sequence with a capacitor C1, a control terminal 1, a PIN tube D2, a control terminal 2, and a capacitor C3, and the input port and the output port 2 are connected in sequence with a capacitor C1, a control terminal 1, a PIN tube D1, a control terminal 3, and a capacitor C2.

[0020] The PIN tube is compensated in real time by the inductor L1, the inductor L2 and the capacitor C, the static working point of the PIN tube is adjusted according to different working conditions, the PIN tube is guaranteed to work in the optimal state, and therefore the reliability of the PIN tube is improved.

[0021] Further, the control end 5 of each PIN tube biasing circuit is connected to the control end 1, the control end 2 and the control end 3 in the PIN tube switching circuit.

[0022] Each PIN tube biasing circuit is connected to the control end 5, so that the PIN tube switching circuit can be switched to any link, and real-time adjustment and compensation can be realized, and therefore the reliability and stability of the PIN tube switching device are improved.

[0023] Further, the control end 4 of each PIN tube biasing circuit is connected to the power supply circuit.

[0024] The power supply circuit provides power supply for the PIN tube biasing circuit.

[0025] Compared with the prior art, the PIN tube switching device has the advantages of long electrical life, fast response speed, short conduction time, small size, light weight and small loss, and therefore the reliability and stability of the PIN tube switching device product are improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The utility model discloses a connection schematic diagram.

[0027] Figure 2 The utility model discloses a PIN tube switching circuit connection schematic diagram.

[0028] Figure 3 The utility model discloses a PIN tube biasing circuit connection schematic diagram.

[0029] Figure 4 The utility model discloses a PIN tube reverse isolation circuit connection schematic diagram. DETAILED DESCRIPTION

[0030] The drawings of the utility model are only used for example explanation, and cannot be understood as the limitation of the utility model. In order to better illustrate the following embodiments, some components in the drawings can be omitted, enlarged or reduced, and the size of actual product is not represented. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings can be omitted.

[0031] Embodiment

[0032] As Figures 1-4 shown, the embodiment provides a high-reliability stable PIN tube switch device, which comprises: a PIN tube switch switching circuit for controlling PIN tube switch switching signal output; a PIN tube bias circuit connected between the PIN tube switch switching circuit and the power supply circuit, which controls the PIN tube switch switching circuit by changing the control level of the PIN tube bias circuit to realize the switching of the output port; a PIN tube reverse isolation circuit connected between the PIN tube switch switching circuit and the power supply circuit, which is used to eliminate the PIN tube reverse crosstalk of the PIN tube switch switching circuit before and after switching; the PIN tube reverse isolation circuit is also connected between the PIN tube bias circuit and the power supply circuit, which performs static bias compensation on the PIN tube bias circuit according to real-time conditions when the PIN tube works; and a power supply circuit for providing power supply for the PIN tube bias circuit and the PIN tube reverse isolation circuit.

[0033] In the embodiment, when the PIN tube works under different working conditions and through signals of different powers, the temperature change, frequency response and other parameters of the PIN will change the parasitic parameters of the PIN tube, and the change of the parasitic parameters will cause the static working point of the PIN tube to deviate, the conductor voltage to change, the dissipation power to change, etc., which will further affect the working state of the PIN. Therefore, the embodiment adjusts and compensates the static working state of the PIN tube in real time through the PIN tube bias circuit to ensure that the PIN tube can work stably and reliably under any working environment, thereby improving the reliability of the PIN tube; and the PIN tube reverse isolation circuit eliminates the reverse interference problem when the PIN tube is applied to the switching and transmission of radio frequency link signals.

[0034] The PIN tube reverse isolation circuit comprises a reverse protection circuit and a static bias compensation circuit, the reverse protection circuit comprises a voltage boosting circuit, the output end of the voltage boosting circuit is connected to the static bias compensation circuit and the PIN tube switch switching circuit, the input end of the voltage boosting circuit is connected to the power supply circuit, the output end of the static bias compensation circuit is connected to the PIN tube bias circuit and the PIN tube switch switching circuit, and the input end of the static bias compensation circuit is connected to the voltage boosting circuit and the power supply circuit.

[0035] In the embodiment, the PIN tube reverse isolation circuit comprises one voltage boosting circuit and two constant current source driving circuits. The voltage boosting circuit boosts the low voltage provided by the power supply circuit to high voltage, so as to provide an isolation voltage for PIN tube forward and reverse switching control, and ensure that there is a high and stable reverse protection voltage when the PIN tube is turned on or turned off.

[0036] The static bias compensation circuit comprises a first constant current source and a second constant current source, input ends of the first constant current source and the second constant current source are connected to the power supply circuit and the voltage boosting circuit at the same time, and output ends of the first constant current source and the second constant current source are connected to the PIN tube bias circuit and the PIN tube switch switching circuit.

[0037] In the embodiment, the first constant current source and the second constant current source provide a stable current to ensure stable operation of the PIN tube, ensure that there is a stable and reliable current source to drive the PIN tube to turn on or turn off, and improve the stability and reliability of the PIN tube in actual application.

[0038] The PIN tube switch switching circuit comprises one input port and two output ports, each input port or output port is serially connected with a capacitor and is provided with a control port, and the input signal of the PIN tube is switched to different output ports for signal output by changing the state of the control port.

[0039] In the embodiment, the switching characteristics of the diode conduction and cutoff of the PIN tube are utilized, the PIN conduction or cutoff is controlled by the static working bias circuit to realize on-off, and thus the switching function of the circuit is realized.

[0040] The output port comprises output port 1 and output port 2, the input port and the output port 1 are sequentially connected with a capacitor C1, a control end 1, a PIN tube D2, a control end 2 and a capacitor C3, and the input port and the output port 2 are sequentially connected with the capacitor C1, the control end 1, the PIN tube D1, a control end 3 and a capacitor C2.

[0041] In the embodiment, the PIN tube switch switching circuit comprises one input port and two output ports, each input port and output port is serially connected with a capacitor and is provided with a control port. By changing the state of control 1, control 2 and control 3, the conduction or cutoff state of the PIN tube D1 and the PIN tube D2 is controlled to realize signal flow from the input port to the output port 2 or from the input port to the output port 1.

[0042] The forward current direction of the PIN tube D2 is from the control end 1 to the control end 2, and the forward current direction of the PIN tube D1 is from the control end 3 to the control end 1.

[0043] In the embodiment, the positive pole of the PIN tube D2 is connected to the control end 1, and the negative pole of the PIN tube D2 is connected to the control end 2; the positive pole of the PIN tube D1 is connected to the control end 3, and the negative pole of the PIN tube D1 is connected to the control end 1.

[0044] The PIN tube bias circuit comprises two inductors and a capacitor, one inductor is connected to the power supply circuit, and the other inductor is connected to the control port, the two inductors are connected in series, and one end of the capacitor is grounded and the other end is connected to the series connection point of the two inductors.

[0045] The PIN tube bias circuit comprises an inductor L1, an inductor L2, a capacitor C, a control end 4 and a control end 5, one end of the inductor L1 and the inductor L2 is connected to the capacitor C, the other end of the inductor L1 is connected to the control end 4, the other end of the inductor L2 is connected to the control end 5, and the other end of the capacitor C is grounded.

[0046] The PIN tube bias circuit comprises three, and the control end 5 of each PIN tube bias circuit is connected to the control end 1, the control end 2 and the control end 3 of the PIN tube switch switching circuit respectively.

[0047] The control end 4 of each PIN tube bias circuit is connected to the power supply circuit.

[0048] In the embodiment, the power supply circuit is connected to the control end 4, the control end 1 of the PIN tube switch switching circuit, the control end 2 of the PIN tube switch switching circuit and the control end 3 of the PIN tube switch switching circuit are connected to the control end 5 respectively, the control end 4 is connected to the inductor L1, the control end 5 is connected to the inductor L2, the inductor L1 and the inductor L2 are connected in series, the series connection point between the two inductors is connected to the capacitor C, and the capacitor C is connected to the ground end.

[0049] Obviously, the above embodiments of the utility model are only examples for clearly explaining the technical scheme of the utility model, and are not the limitation of the specific embodiments of the utility model. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model claim should be included in the protection scope of the utility model claim.

Claims

1. A highly reliable and stable PIN tube switch device, characterized in that: include: Power supply circuit; PIN tube switch switching circuit: used to control the PIN tube switch switching signal output; PIN transistor bias circuit: The PIN transistor bias circuit is connected between the PIN transistor switch switching circuit and the power supply circuit, and controls the PIN transistor switch switching circuit by changing the control level of the PIN transistor bias circuit to achieve output port switching; PIN transistor reverse isolation circuit: The PIN transistor reverse isolation circuit is connected between the PIN transistor switching circuit and the power circuit to eliminate PIN transistor reverse crosstalk in signals transmitted before and after switching of the PIN transistor switching circuit. The PIN transistor reverse isolation circuit is also connected between the PIN transistor bias circuit and the power circuit to perform static bias compensation on the PIN transistor bias circuit based on real-time conditions when the PIN transistor is operating. The power supply circuit is used to provide power for the PIN tube bias circuit and the PIN tube reverse isolation circuit.

2. A highly reliable and stable PIN tube switch device according to claim 1, characterized in that: The PIN tube reverse isolation circuit includes a reverse protection circuit and a static bias compensation circuit. The reverse protection circuit includes a voltage boosting circuit. The output end of the voltage boosting circuit is connected to the static bias compensation circuit and the PIN tube switch switching circuit. The input end of the voltage boosting circuit is connected to the power supply circuit. The output end of the static bias compensation circuit is connected to the PIN tube bias circuit and the PIN tube switch switching circuit. The input end of the static bias compensation circuit is connected to the voltage boosting circuit and the power supply circuit.

3. A highly reliable and stable PIN switch device according to claim 2, characterized in that: The static bias compensation circuit includes a first constant current source and a second constant current source. The input ends of the first constant current source and the second constant current source are simultaneously connected to the power supply circuit and the voltage boost circuit. The output ends of the first constant current source and the second constant current source are connected to the PIN tube bias circuit and the PIN tube switch switching circuit.

4. The highly reliable and stable PIN switch device according to claim 1, characterized in that: The PIN tube switch switching circuit includes an input port and two output ports. Each input port or output port is connected in series with a capacitor and is provided with a control port. By changing the state of the control port, the input signal of the PIN tube is controlled to switch to different output ports for signal output.

5. The highly reliable and stable PIN switch device according to claim 4, characterized in that: The output port includes output port 1 and output port 2. The capacitor C1, control terminal 1, PIN transistor D2, control terminal 2, and capacitor C3 are connected in sequence between the input port and the output port 1. The capacitor C1, control terminal 1, PIN transistor D1, control terminal 3, and capacitor C2 are connected in sequence between the input port and the output port 2.

6. The highly reliable and stable PIN tube switch device according to claim 5, characterized in that: The forward current direction of the PIN transistor D2 flows from the control terminal 1 to the control terminal 2, and the forward current direction of the PIN transistor D1 flows from the control terminal 3 to the control terminal 1.

7. The highly reliable and stable PIN switch device according to claim 4, characterized in that: The PIN tube bias circuit includes two inductors and a capacitor, one inductor is used to connect to the power supply circuit, and the other inductor is used to connect to the control port. The two inductors are connected in series, and one end of the capacitor is grounded and the other end is connected to the series connection point of the two inductors.

8. The highly reliable and stable PIN switch device according to claim 7, characterized in that: The PIN tube bias circuit includes an inductor L1, an inductor L2, a capacitor C, a control terminal 4 and a control terminal 5. One end of the inductor L1 and the inductor L2 is connected to the capacitor C, the other end of the inductor L1 is connected to the control terminal 4, the other end of the inductor L2 is connected to the control terminal 5, and the other end of the capacitor C is grounded.

9. The highly reliable and stable PIN switch device according to claim 7, characterized in that: The PIN transistor bias circuits include three, and the control terminal 5 in each PIN transistor bias circuit is respectively connected to the control terminal 1, the control terminal 2 and the control terminal 3 in the PIN transistor switch circuit.

10. The highly reliable and stable PIN tube switch device according to claim 9, characterized in that: The control terminal 4 in each PIN transistor bias circuit is connected to the power supply circuit.

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