A high-reliability medium power frequency hopping filter

Abstract

The utility model provides a kind of high reliability middle power frequency hopping filter, including frequency hopping filter main circuit and switch drive circuit;The frequency hopping filter main circuit includes one-to-many switch, multiple channel module and multiple-in-one switch;Multiple channel module includes multiple channels;One of the channels is straight-through channel, and the rest of the channels are filter channels of different frequency bands;All filter channels and straight-through channels are respectively connected with one-to-many switch and multiple-in-one switch;It further includes detection circuit for detecting whether power supply voltage is normal;The output of detection circuit is respectively connected with one-to-many switch and multiple-in-one switch.The middle power frequency hopping filter can detect power supply voltage in real time, switch straight-through channel conduction when power supply is abnormal, can continue to adhere to work, can avoid component damage due to power supply abnormality, prolong service life, improve the reliability of equipment.

Description

Technical Field

[0001] This utility model relates to the field of frequency hopping filtering technology, and more specifically, to a highly reliable medium-power frequency hopping filter. Background Technology

[0002] Current medium-power frequency-hopping filters are all built from discrete components, including resonant circuits, switched capacitor arrays, and driver circuits. Their circuit principles are as follows: Figure 1 As shown, frequency-hopping filters use hundreds of electronic components, most of which are related to the +200V power supply. Statistics show that many medium-power frequency-hopping filter failures are due to abnormal +200V power supply, which burns out high-voltage components, leading to +200V high-voltage current limiting or open circuit, rendering the entire frequency-hopping filter inoperable and reducing or eliminating the overall system output power. Therefore, there is an urgent need to design a medium-power frequency-hopping filter that can avoid component damage caused by abnormal power supply. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and provide a highly reliable medium-power frequency hopping filter. This medium-power frequency hopping filter can detect the power supply voltage in real time. When the power supply is abnormal, it switches the direct channel to conduct, so that it can continue to work. This can avoid damage to components due to power supply abnormalities, extend service life, and improve the reliability of the equipment.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a high-reliability medium-power frequency hopping filter, comprising a frequency hopping filter main circuit and a switch driving circuit; the frequency hopping filter main circuit includes a one-to-many switch, a multi-channel module, and an all-in-one switch; the multi-channel module includes multiple channels; one channel is a through channel, and the remaining channels are filter channels for different frequency bands; all filter channels and through channels are respectively connected to the one-to-many switch and the all-in-one switch; it also includes a detection circuit for detecting whether the power supply voltage is normal; the output of the detection circuit is respectively connected to the one-to-many switch and the all-in-one switch.

[0005] Preferably, the detection circuit includes a voltage divider module for dividing the supply voltage to acquire a supply voltage signal, a comparator for comparing the signal acquired by the voltage divider module with a reference signal, an OR gate for ORing the comparator output signal with a filter channel selection signal, and an NOT gate for NOTing the comparator output signal; the outputs of the comparator, the OR gate, and the NOT gate are respectively connected to a one-to-many switch and a multiplexer.

[0006] Preferably, the filter channel is two; the one-to-many switch is a one-to-three switch; and the multi-in-one switch is a three-in-one switch.

[0007] Preferably, each filter channel includes a resonant main line and N resonant units sequentially connected to the resonant main line.

[0008] Preferably, the i-th resonant unit includes a resistor R1i, a capacitor C1i, a capacitor C2i, a capacitor C3i, an inductor L1i, and a diode VD1i; i = 1, 2…N; The control terminal HAi of the i-th resonant unit is grounded through capacitor C1i, and connected to the resonant main circuit through resistor R1i, inductor L1i and capacitor C3i connected in series. The connection between inductor L1i and capacitor C3i is grounded through diode VD1i and capacitor C2i. The connection between diode VD1i and capacitor C2i is connected to the working voltage of 3.3V.

[0009] Preferably, the switch driving circuit includes N driving units; each driving unit corresponds one-to-one with each resonant unit.

[0010] Preferably, the i-th drive unit includes resistor R2i, resistor R3i, transistor VQ1i, transistor VQ2i, and diode VD2i; The digital interface output Di of the switch driver is connected to the base of transistor VQ2i through resistor R2i; the emitter of transistor VQ2i is grounded; the collector of transistor VQ2i is connected to the supply voltage through resistor R3i and to the base of transistor VQ1i; the collector of transistor VQ1i is connected to the supply voltage; the base and emitter of transistor VQ1i are connected through diode VD2i; the emitter of transistor VQ1i is connected to the control terminal HAi of the i-th resonant unit.

[0011] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. This utility model of a medium-power frequency hopping filter adds a detection circuit to monitor the power supply voltage in real time. If the detected power supply voltage is higher than a preset threshold, the direct path is switched on directly. Even if the power supply is abnormal, it will not affect the overall transmission power and will continue to work. When the power supply returns to normal, the medium-power frequency hopping filter will switch the filter channel normally. This can avoid damage to components due to abnormal power supply, extend service life, and improve the reliability of the equipment. 2. The medium-power frequency hopping filter of this utility model has stable and reliable frequency hopping filtering capabilities. Attached Figure Description

[0012] Figure 1 This is a block diagram of an existing frequency hopping filter. Figure 2 This is a block diagram of the principle of the medium power frequency hopping filter of this utility model; Figure 3This is the schematic diagram of the main circuit of the frequency hopping filter of the medium power frequency hopping filter of this utility model; Figure 4 This is a schematic diagram of the switching drive circuit of the medium power frequency hopping filter of this utility model; Figure 5 This is a schematic diagram of the detection circuit of the medium power frequency hopping filter of this utility model. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Example 1 This embodiment presents a high-reliability medium-power frequency-hopping filter, including a frequency-hopping filter main circuit and a switch drive circuit. For example... Figure 2 As shown, the frequency hopping filter main circuit includes a one-to-many switch, a multi-channel module, and an all-in-one switch. The multi-channel module includes multiple channels; one channel is a pass-through channel, and the remaining channels are filter channels for different frequency bands; all filter channels and pass-through channels are connected to the one-to-many switch and the all-in-one switch, respectively.

[0015] Specifically, such as Figure 3 and Figure 4 As shown, each filter channel includes a resonant main line and N resonant units sequentially connected to the resonant main line. The i-th resonant unit includes a resistor R1i, a capacitor C1i, a capacitor C2i, a capacitor C3i, an inductor L1i, and a diode VD1i; i=1,2…N; the control terminal HAi of the i-th resonant unit is grounded through capacitor C1i and connected to the resonant main line through the resistor R1i, inductor L1i, and capacitor C3i connected in series; the connection between inductor L1i and capacitor C3i is grounded through diode VD1i and capacitor C2i; the connection between diode VD1i and capacitor C2i is connected to the operating voltage of 3.3V.

[0016] The switch drive circuit includes N drive units; each drive unit corresponds one-to-one with a resonant unit. The i-th drive unit includes resistors R2i and R3i, transistors VQ1i and VQ2i, and diode VD2i; the digital interface output Di of the switch drive is connected to the base of transistor VQ2i through resistor R2i; the emitter of transistor VQ2i is grounded; the collector of transistor VQ2i is connected to the supply voltage through resistor R3i and to the base of transistor VQ1i; the collector of transistor VQ1i is connected to the supply voltage; the base and emitter of transistor VQ1i are connected through diode VD2i; the emitter of transistor VQ1i is connected to the control terminal HAi of the i-th resonant unit.

[0017] The medium-power frequency hopping filter also includes a detection circuit for detecting whether the power supply voltage is normal; the output of the detection circuit is connected to a splitter switch and a multi-in-one switch respectively, so as to realize the switching of the direct channel by the output of the detection circuit through the splitter switch and the multi-in-one switch.

[0018] like Figure 5 As shown, the detection circuit includes a voltage divider module (resistors R5 and R6) for dividing the supply voltage to acquire a supply voltage signal, a comparator for comparing the signal acquired by the voltage divider module with a reference signal, an OR gate for ORing the comparator output signal with a filter channel selection signal, and an NOT gate for NOTing the comparator output signal; the outputs of the comparator, the OR gate, and the NOT gate are respectively connected to a one-to-many switch and a multiplexer.

[0019] In this embodiment, there are two filter channels: a U-segment filter channel and a V-segment filter channel. Correspondingly, the one-to-many switch is a one-to-three switch, and the multi-to-one switch is a three-to-one switch. A8 is the filter channel selection signal, i.e., the UV segmentation code. When A8=0, the V-segment filter channel is selected; when A8=1, the U-segment filter channel is selected. In the detection circuit, when the power supply voltage is normal, the comparator output HV-Check=0, the NOT gate output signal / HV-Check=1, and the OR gate output OR-A8 has the same level as the filter channel selection signal A8. When the power supply voltage is abnormal, the comparator output HV-Check=1, the NOT gate output signal / HV-Check=0, and the OR gate output OR-A8=1. The one-to-three switch and the three-to-one switch are executed according to Table 1.

[0020] Table 1. Truth Table of Logic for One-to-Three Switch and Three-in-One Switch

[0021] When the power supply voltage is normal (1) When A8=0, the V-segment filter channel is selected; the logic level at this time is: OR-A8=0, HV-Check=0, / HV-Check=1, the TX3 path of the one-to-three switch and the three-in-one switch is turned on, which is the V-segment filter channel; (2) When A8=1, the U-band filter channel is selected; the logic level at this time is: OR-A8=1, HV-Check=0, / HV-Check=1, the TX2 path of the one-to-three switch and the three-in-one switch is turned on, which is the U-band filter channel; When the power supply voltage is abnormal, regardless of whether A8=0 or A8=1, the logic level is: OR-A8=1, HV-Check=1, / HV-Check=0, the conduction path TX1 of the one-to-three switch and the three-in-one switch is the direct channel.

[0022] Based on the truth tables of the one-to-three switch and the three-in-one switch, the one-to-three switch and the three-in-one switch can be controlled using existing methods.

[0023] This utility model of a medium-power frequency-hopping filter adds a detection circuit to monitor the supply voltage in real time. If the detected supply voltage exceeds a preset threshold, the 1-to-3 switch and the 3-in-1 switch directly switch to conduct the direct path. Even in the event of a power supply anomaly, the overall transmission power is not affected, and the filter can continue to operate. When the power supply returns to normal, the medium-power frequency-hopping filter switches the filter channels normally. This avoids component damage due to power supply anomalies, extends service life, and improves the reliability of the equipment.

[0024] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A high-reliability medium-power frequency hopping filter, comprising a frequency hopping filter main circuit and a switch driving circuit; characterized in that: The frequency hopping filter main circuit includes a splitter switch, a multi-channel module, and an all-in-one switch; the multi-channel module includes multiple channels; one channel is a pass-through channel, and the remaining channels are filter channels for different frequency bands; all filter channels and pass-through channels are connected to the splitter switch and the all-in-one switch respectively; it also includes a detection circuit for detecting whether the power supply voltage is normal; the output of the detection circuit is connected to the splitter switch and the all-in-one switch respectively.

2. The high-reliability medium power hopping filter of claim 1, wherein: The detection circuit includes a voltage divider module for dividing the supply voltage to acquire a supply voltage signal, a comparator for comparing the signal acquired by the voltage divider module with a reference signal, an OR gate for ORing the comparator output signal with a filter channel selection signal, and an NOT gate for NOTing the comparator output signal; the outputs of the comparator, the OR gate, and the NOT gate are respectively connected to a one-to-many switch and a multiplexer.

3. The high-reliability medium power hopping filter of claim 1, wherein: The filter has two channels; the one-to-many switch is a one-to-three switch; and the multi-in-one switch is a three-in-one switch.

4. The high-reliability medium-power frequency hopping filter according to claim 1, characterized in that: Each filter channel includes a resonant main line and N resonant units sequentially connected to the resonant main line.

5. The high-reliability medium-power frequency hopping filter according to claim 4, characterized in that: The i-th resonant unit includes a resistor R1i, a capacitor C1i, a capacitor C2i, a capacitor C3i, an inductor L1i, and a diode VD1i; i=1,2…N; The control terminal HAi of the i-th resonant unit is grounded through capacitor C1i, and connected to the resonant main circuit through resistor R1i, inductor L1i and capacitor C3i connected in series. The connection between inductor L1i and capacitor C3i is grounded through diode VD1i and capacitor C2i. The connection between diode VD1i and capacitor C2i is connected to the working voltage of 3.3V.

6. The high-reliability medium-power frequency hopping filter according to claim 5, characterized in that: The switch drive circuit includes N drive units; each drive unit corresponds one-to-one with a resonant unit.

7. The high-reliability medium-power frequency hopping filter according to claim 6, characterized in that: The i-th drive unit includes resistor R2i, resistor R3i, transistor VQ1i, transistor VQ2i, and diode VD2i; The digital interface output Di of the switch driver is connected to the base of transistor VQ2i through resistor R2i; the emitter of transistor VQ2i is grounded; the collector of transistor VQ2i is connected to the supply voltage through resistor R3i and to the base of transistor VQ1i; the collector of transistor VQ1i is connected to the supply voltage; the base and emitter of transistor VQ1i are connected through diode VD2i; the emitter of transistor VQ1i is connected to the control terminal HAi of the i-th resonant unit.

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