CN216490483U

CN216490483U - Radio frequency circuit

Info

Publication number: CN216490483U
Application number: CN202123193274.1U
Authority: CN
Inventors: 唐理洋
Original assignee: Microport Sorin CRM Shanghai Co Ltd
Current assignee: Microport Sorin CRM Shanghai Co Ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-05-10
Anticipated expiration: 2031-12-16

Abstract

The utility model provides a radio frequency circuit is applied to implanted active device's program controlled equipment, radio frequency circuit includes radio frequency treater and duplexer, be connected with the amplifier module between radio frequency treater and the duplexer. By the configuration, the wireless transmitting signal power of the program control equipment is increased and/or the receiving sensitivity of the program control equipment is increased through the amplifier module, so that the working current of the implanted active equipment during communication is effectively reduced, the service life of a battery is prolonged, and the communication stability is improved; the problems of large wireless link power consumption and insufficient communication stability of the implanted active equipment in the prior art are solved.

Description

Radio frequency circuit

Technical Field

The utility model relates to an implanted active device technical field, in particular to radio frequency circuit.

Background

The first implanted cardiac pacemaker in the world was implanted in 1958, which has since opened a new era in pacemaker therapy in the area of heart disease, and over 60 years later, different types of implanted active devices have emerged. Implantable active devices are becoming smaller and smaller, increasingly intelligent in function, and require as long a battery life as possible. The implantable active device communicates with the external programmable device through a wireless signal, but due to the introduction of the wireless function of the implantable active device, the power consumption of the wireless signal is relatively high, which has higher and higher requirements on the battery life or the power saving function of the implantable active device, and therefore, the optimization of the power consumption of the wireless link and the stability of the communication face huge challenges. That is to say, the wireless link of the implanted active device in the prior art has a large power consumption and insufficient communication stability.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a radio frequency circuit to solve the great and not enough problem of communication stability of wireless link consumption of the implanted active device that exists among the prior art.

In order to solve the technical problem, the utility model provides a radio frequency circuit is applied to implanted active device's programme-controlled equipment, radio frequency circuit includes radio frequency processor and duplexer, be connected with the amplifier module between radio frequency processor and the duplexer.

Optionally, the amplifier module includes a transmitting and amplifying unit, and the radio frequency processor, the transmitting and amplifying unit and the duplexer are sequentially connected in series.

Optionally, the transmit amplifying unit includes a transmit switching element, a transmit bypass, and at least two transmit amplifiers; the input end of at least one of the transmitting amplifiers is connected with the output end of the radio frequency processor or the output end of the other transmitting amplifier through the transmitting switching element.

The first output end of the transmitting switching element is connected with the input end of one transmitting amplifier, the second output end of the transmitting switching element is connected with the input end of one transmitting bypass, the output end of the transmitting bypass is connected with the output end of one transmitting amplifier, and the input end of the transmitting switching element is connected with the output end of the radio frequency processor or the output end of the other transmitting amplifier.

Optionally, the number of the transmission switching elements is one less than the number of the transmission amplifiers, and one transmission switching element is disposed between any two adjacent transmission amplifiers.

Optionally, the radio frequency circuit further includes a main processor and a communication link signal measurement module; the signal input end of the main processor is connected with the output end of the communication link signal measuring module, and the control signal output end of the main processor is connected with the control end of the emission switching element.

Optionally, the amplifier module includes a receiving and amplifying unit, and the duplexer, the receiving and amplifying unit and the radio frequency processor are sequentially connected in series.

Optionally, the receiving and amplifying unit includes a receiving switching element, a receiving bypass, and at least two receiving amplifiers; an input terminal of at least one of the receiving amplifiers is connected to an output terminal of the duplexer or an output terminal of the other receiving amplifier through the receiving switching element.

The first output end of the receiving switching element is connected with the input end of the receiving amplifier, the second output end of the receiving switching element is connected with the input end of the receiving bypass, the output end of the receiving bypass is connected with the output end of the receiving amplifier, and the input end of the receiving switching element is connected with the output end of the duplexer or the other output end of the receiving amplifier.

Optionally, the receiving amplifier has a noise filtering function.

Optionally, the number of the receiving switching elements is one less than the number of the receiving amplifiers, and one receiving switching element is disposed between any two adjacent receiving amplifiers.

Optionally, the radio frequency circuit further includes a main processor and a communication link signal measurement module; the signal input end of the main processor is connected with the output end of the communication link signal measuring module, and the control signal output end of the main processor is connected with the control end of the receiving switching element.

Compared with the prior art, the utility model provides a radio frequency circuit is applied to implanted active device's programme-controlled equipment, radio frequency circuit includes radio frequency processor and duplexer, be connected with the amplifier module between radio frequency processor and the duplexer. According to the configuration, the wireless transmitting signal power of the program control equipment is increased and/or the receiving sensitivity of the program control equipment is increased through the amplifier module, so that the working current during the communication of the implanted active equipment is effectively reduced, the service life of a battery is prolonged, and the communication stability is improved; the problems that the wireless link power consumption of the implanted active equipment is large and the communication stability is insufficient in the prior art are solved.

Drawings

Those skilled in the art will appreciate that the drawings are provided for a better understanding of the invention and do not constitute any limitation on the scope of the invention. Wherein:

FIG. 1 is a schematic view of a use scenario of an implantable active device;

fig. 2 is a schematic structural diagram of a radio frequency circuit according to an embodiment of the present invention;

fig. 3a is a schematic diagram of a connection mode of a transmission amplifier according to an embodiment of the present invention;

fig. 3b is a schematic diagram of a connection mode of a transmission amplifier according to another embodiment of the present invention;

fig. 3c is a schematic diagram of a connection mode of a transmission amplifier according to still another embodiment of the present invention;

fig. 4a is a schematic diagram of a connection mode of a receiving amplifier according to an embodiment of the present invention;

fig. 4b is a schematic diagram of a connection mode of a receiving amplifier according to another embodiment of the present invention;

fig. 4c is a schematic diagram of a connection mode of a receiving amplifier according to still another embodiment of the present invention.

In the drawings:

1-program control equipment; 2-an implanted active device; 3-human body;

4-a radio frequency processor; 5-a duplexer; 6-a transmit amplification unit; 7-a receiving amplification unit; 8-an antenna; 9-a main processor; 10-a communication link signal measurement module; 20-an amplifier module;

61-a transmit amplifier; 62-a transmit switching element; 63-a launch bypass; 71-a receiving amplifier; 72-receive switching element; 73-receive bypass.

Detailed Description

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in simplified form and are not to scale, but rather are provided for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

As used in this application, the singular forms "a", "an" and "the" include plural referents, the term "or" is generally employed in a sense including "and/or," the terms "a", "an" and "the" are generally employed in a sense including "at least one", the terms "at least two" and "two or more" are generally employed in a sense including "two or more", and moreover, the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or imply that there is a number of technical features being indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or at least two of such features, the term "proximal" is typically the end near the operator, the term "distal" is typically the end near the patient, "end" with "another end" and "proximal" with "distal" are typically the corresponding two parts, which include not only end points, the terms "mounted", "connected" and "connected" are to be understood broadly, e.g., they may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Furthermore, as used in the present application, the disposition of an element with another element generally only means that there is a connection, coupling, fit, or drive relationship between the two elements, and the connection, coupling, fit, or drive between the two elements may be direct or indirect through intermediate elements, and is not to be understood as indicating or implying any spatial relationship between the two elements, i.e., an element may be in any orientation within, outside, above, below, or to one side of another element unless the content clearly dictates otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The core idea of the utility model is to provide a radio frequency circuit to solve the great and not enough problem of communication stability of wireless link consumption of the implanted active device that exists among the prior art.

The following description refers to the accompanying drawings.

Referring to fig. 1 to 4c, fig. 1 and fig. 1 are schematic views illustrating a usage scenario of an implanted active device;

fig. 2 is a schematic structural diagram of a radio frequency circuit according to an embodiment of the present invention; fig. 3a is a schematic diagram of a connection mode of a transmission amplifier according to an embodiment of the present invention; fig. 3b is a schematic diagram of a connection mode of a transmission amplifier according to another embodiment of the present invention; fig. 3c is a schematic diagram of a connection mode of a transmission amplifier according to still another embodiment of the present invention; fig. 4a is a schematic diagram of a connection mode of a receiving amplifier according to an embodiment of the present invention; fig. 4b is a schematic diagram of a connection mode of a receiving amplifier according to another embodiment of the present invention; fig. 4c is a schematic diagram of a connection mode of a receiving amplifier according to still another embodiment of the present invention.

As shown in fig. 1, the usage scenario of the implanted active device 2 is as follows. The implanted active device 2 is implanted in a human body 3, and the implanted active device 2 transmits data thereof to the program control device 1 outside the body in a wireless mode; then the in vitro program control device 1 judges whether the parameters of the implanted active device 2 need to be modified according to the data of the implanted active device 2, and if the parameters need to be modified, the parameters of the implanted active device 2 are modified in a wireless mode.

Referring to fig. 2, the present embodiment provides a radio frequency circuit applied to a programmable device 1 of an implanted active device 2, where the radio frequency circuit includes a radio frequency processor 4 and a duplexer 5, an amplifier module 20 is connected between the radio frequency processor 4 and the duplexer 5, the amplifier module 20 includes a transmitting amplification unit 6 and a receiving amplification unit 7, the transmitting amplification unit 6 includes an amplifier for increasing power of a transmitted signal, and the receiving amplification unit 7 includes an amplifier for increasing receiving sensitivity of the programmable device 1. As can be seen from the embodiment shown in fig. 2, the rf circuit including only the transmitting amplifying unit 6 or only the receiving amplifying unit 7 can also have some advantages of stable communication and low power consumption. Above-mentioned structure also, amplifier module 20 includes transmission amplifying unit 6, radio frequency processor 4 transmission amplifying unit 6 with duplexer 5 establishes ties in proper order, and/or, amplifier module 20 is including receiving amplifying unit 7, duplexer 5 receive amplifying unit 7 with radio frequency processor 4 establishes ties in proper order. The radio frequency circuit is connected with an antenna 8 through the duplexer 5. The antenna 8 is used to receive or transmit wireless signals that communicate with the implanted active device 2.

Based on the above configuration, in this embodiment, the amplifier may increase the wireless transmission signal power of the programmable device 1 and/or increase the receiving sensitivity of the programmable device, so as to effectively reduce the working current during the communication of the implanted active device, prolong the service life of the battery, and increase the communication stability; the problems that the wireless link power consumption of the implanted active equipment is large and the communication stability is insufficient in the prior art are solved.

Referring to fig. 3a, the transmitting and amplifying unit 6 includes a transmitting amplifier 61. The transmission amplifier 61 can increase the power of the wireless transmission signal of the program control device 1, so that the signal transmitted by the program control device is better, thereby increasing the communication stability. For the radio frequency function of the programming device 1, increasing the transmission power of the programming device 1 may allow the active device 2 implanted in the body to receive stronger signals. When the received signal is strong, on one hand, the communication stability of the link can be ensured, and on the other hand, when the received signal is strong, compared with a weak received signal, the receiving circuit does not need too much complex operation or can adopt a simple structural design when the circuit is designed, so that the power consumption of the receiving equipment can be reduced. But the transmit power is not allowed to increase indefinitely because an excessive transmit signal may cause the receive circuitry of the implanted active device 2 to receive a radio signal of excessive strength, thereby causing the receive circuitry to oversaturate and affect performance. In addition, under different working conditions, the strength of the transmission signal also needs to be adjusted to achieve the optimal transmission power.

In view of the above, the transmission amplifying unit 6 includes a transmission switching element 62, a transmission bypass 63, and at least two of the transmission amplifiers 61; the input of at least one of the transmit amplifiers 61 is connected to the output of the rf processor 4 (as can be understood with reference to the 1 st transmit switching element 62 in fig. 3 c) or to the output of another one of the transmit amplifiers 61 through the transmit switching element 62.

A first output terminal of the transmit switching element 62 is connected to an input terminal of one of the transmit amplifiers 61, a second output terminal of the transmit switching element 62 is connected to an input terminal of one of the transmit bypasses 63, an output terminal of the transmit bypass 63 is connected to an output terminal of one of the transmit amplifiers, and an input terminal of the transmit switching element 62 is connected to the 4 output terminal of the rf processor or the output terminal of the other one of the transmit amplifiers 61.

Based on the above structure, the transmission switching element 62 is used to selectively switch the transmission amplifier 61 or the transmission bypass 63, which has its output terminal connected, into a circuit so that one part of all the transmission amplifiers 61 is operated and the other part is not operated, thereby selectively changing the total amplification factor of the amplification unit 6 so that the total transmission power has sufficient strength but at the same time does not cause over-saturation of the receiving circuit. The function of the transmission bypass 63 is to short the corresponding transmission amplifier 61 while ensuring that the circuit is still conductive, and the specific structure thereof may be set as required, for example, only a wire or a conductor is used as the transmission bypass 63, and the transmission bypass 63 may also include other necessary circuit elements. The transmission switching element 62 can be implemented by a single-pole double-throw switch element or a single-pole multiple-throw switch element.

In order to facilitate the control algorithm to realize the control, in the embodiment shown in fig. 3a, the number of the transmission switching elements 62 is one less than the number of the transmission amplifiers 61, and one transmission switching element 62 is disposed between any two adjacent transmission amplifiers 61. N represents the total number of the transmission amplifiers 61. The transmission bypass 63 is connected in a manner compatible with the transmission switching element. So configured, the corresponding transmitting amplifiers 61 can be switched according to the target coefficients in ascending or descending order according to the numbering sequence shown in fig. 3a, thereby achieving the desired effect and facilitating the design of the control algorithm.

It is to be understood that the transmit switching elements 62 may be arranged in other ways, for example, in the embodiment shown in fig. 3b, there are a total of 4 transmit amplifiers 61, but only two of them are associated with the transmit switching elements 62, and the other two are independently connected to the system. Alternatively, in the embodiment shown in fig. 3c, there are a total of 3 of the transmit amplifiers 61, wherein each of the transmit amplifiers 61 is associated with one of the transmit switching elements 62. It is to be understood that the number of the transmission amplifiers 61 may also be varied in the above embodiments. In summary, although the embodiment shown in fig. 3a is a preferred connection and facilitates the implementation of the control algorithm, other forms of embodiments may be provided and the variable amplification function may be implemented.

With continued reference to fig. 3a, the rf circuit further includes a main processor 9 and a communication link signal measurement module 10; the signal input end of the main processor 9 is connected with the output end of the communication link signal measurement module 10, and the control signal output end of the main processor 9 is connected with the control end of the emission switching element 62. The main processor 9 obtains information of the communication link through the communication link Signal measurement module 10, determines a Received Signal Strength RSSI (Received Signal Strength Indicator) of the implanted active device 2, and controls the switching of the transmission switching element 62 according to the maximum value of the RSSI Strength, the link loss and the Received Signal Strength of the implanted active device 2, so that part of the transmission amplifier 61 and part of the transmission bypass 63 operate until the maximum value of the Received Signal Strength of the implanted active device 2 is reached or approached.

Referring to fig. 4a, the receiving and amplifying unit 7 includes a receiving amplifier 71. In order to ensure the validity of the final signal, the receiving amplifier 71 preferably has a noise filtering function. The noise filtering function can improve the definition of signals, further reduce the requirement on the output power of the implanted active device 2, and the specific implementation mode can be set according to actual conditions. For the receiving circuit of the programmable device 1, the receiving sensitivity of the programmable device 1 is improved, so that the transmitting power of the implanted active device 2 in vivo can be reduced, and the power consumption can be reduced, and the scheme of the receiving amplifier 71 has better communication stability under the condition that the transmitting power of the implanted active device 2 is not changed.

Similarly, the low noise amplifier of the receiving circuit is not infinitely increased, and due to physical characteristics, the increased amplifier cannot amplify a signal by a certain factor, and the increase of the low noise amplifier cannot bring practical significance. Therefore, the internal device is required to transmit the lowest power through switching of the circuit on the premise of meeting the requirement of stable communication, so that the transmission power consumption of the internal device is reduced.

Referring to fig. 4a, the receiving and amplifying unit 7 includes a receiving switching element 72, a receiving bypass 73 and at least two receiving amplifiers 71; the input of at least one of the receiving amplifiers 71 is connected to the output of the duplexer 5 (as can be understood with reference to the 1 st receiving switching element 72 in fig. 4 c) or the output of another receiving amplifier 71 through the receiving switching element 72.

The first output terminal of the reception switching element 72 is connected to the input terminal of one of the reception amplifiers 71, the second output terminal of the reception switching element 72 is connected to the input terminal of one of the reception bypasses 73, the output terminal of the reception bypass 73 is connected to the output terminal of one of the reception amplifiers 71, and the input terminal of the reception switching element 72 is connected to the output terminal of the duplexer 5 or the output terminal of the other of the reception amplifiers 71. The function of the receive bypass 73 is to short the corresponding receive amplifier 71 while ensuring that the circuit is still conducting, and the receive switch element 72 can be implemented by a single-pole double-throw switch element or a single-pole multiple-throw switch element.

In fig. 4a, the number of the reception switching elements 72 is one less than the number of the reception amplifiers 71, and one reception switching element 72 is provided between any two adjacent reception amplifiers 71.

Referring to fig. 4b and 4c, similar to the idea of the connection mode of the transmission amplifier 61 in the present specification, although fig. 4a is a better connection mode, the connection mode shown in fig. 4b and 4c is also one of the embodiments of the present invention. The contents of this section are understood with reference to the description of the connection mode of the transmission amplifier 61 in this specification.

It should be understood that in an embodiment of a complete rf circuit, the connection shown in fig. 3a may be combined with the connection shown in fig. 4b to form an embodiment, and the contents shown in fig. 3a to 3c and fig. 4a to 4c do not need to be mechanically corresponding. Other possibilities are possible which are not described in fig. 3a to 4 c.

Further, referring to fig. 4a, the radio frequency circuit further includes a main processor 9 and a communication link signal measurement module 10; the signal input end of the main processor 9 is connected to the output end of the communication link signal measurement module 10, and the control signal output end of the main processor 9 is connected to the control end of the receiving switching element 72. The main processor 9 may obtain the currently received signal strength RSSI through the communication link signal measurement module 10, and determine whether a certain receiving amplifier 71 may be turned on again according to the current RSSI value, so as to feed back the RSSI value to the implanted active device 2, so that the implanted active device 2 can appropriately reduce the transmission power, thereby reducing the power consumption of the implanted active device 2.

In this embodiment, the specific working details of the main processor 9, the duplexer 5, the antenna 8 and other elements not described may be set according to the requirement, and are not described herein.

In summary, the radio frequency circuit provided in this embodiment is applied to the program control device 1 of the implantable active device 2, the radio frequency circuit includes a radio frequency processor 4 and a duplexer 5, and an amplifier module 20 is connected between the radio frequency processor 4 and the duplexer 5. With such configuration, the amplifier module 20 increases the wireless transmission signal power of the programmable control device 1 and/or increases the receiving sensitivity of the programmable control device 1, thereby effectively reducing the working current during the communication of the implanted active device 2, prolonging the service life of the battery, and increasing the communication stability; the problems that the wireless link of the implanted active device 2 is large in power consumption and poor in communication stability in the prior art are solved.

The above description is only for the description of the preferred embodiment of the present invention, and not for any limitation of the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure all belong to the protection scope of the technical solution of the present invention.

Claims

1. A radio frequency circuit is applied to program control equipment of an implanted active device and is characterized in that the radio frequency circuit comprises a radio frequency processor and a duplexer, and an amplifier module is connected between the radio frequency processor and the duplexer.

2. The radio frequency circuit according to claim 1, wherein the amplifier module comprises a transmitting amplifying unit, and the radio frequency processor, the transmitting amplifying unit and the duplexer are sequentially connected in series.

3. The radio frequency circuit according to claim 2, wherein the transmission amplifying unit includes a transmission switching element, a transmission bypass, and at least two transmission amplifiers; the input end of at least one of the transmitting amplifiers is connected with the output end of the radio frequency processor or the output end of the other transmitting amplifier through the transmitting switching element;

4. The radio frequency circuit according to claim 3, wherein the number of the transmission switching elements is one less than the number of the transmission amplifiers, and one transmission switching element is provided between any two adjacent transmission amplifiers.

5. The radio frequency circuit of claim 3, further comprising a main processor and a communication link signal measurement module; the signal input end of the main processor is connected with the output end of the communication link signal measuring module, and the control signal output end of the main processor is connected with the control end of the emission switching element.

6. The RF circuit of claim 1, wherein the amplifier module comprises a receiving and amplifying unit, and the duplexer, the receiving and amplifying unit and the RF processor are connected in series in sequence.

7. The radio frequency circuit according to claim 6, wherein the reception amplifying unit includes a reception switching element, a reception bypass, and at least two reception amplifiers; an input terminal of at least one of the receiving amplifiers is connected with an output terminal of the duplexer or an output terminal of the other receiving amplifier through the receiving switching element;

8. The radio frequency circuit according to claim 7, wherein the receiving amplifier has a noise filtering function.

9. The radio frequency circuit according to claim 7, wherein the number of the reception switching elements is one less than the number of the reception amplifiers, and one reception switching element is provided between any two adjacent reception amplifiers.

10. The radio frequency circuit of claim 7, further comprising a main processor and a communication link signal measurement module; the signal input end of the main processor is connected with the output end of the communication link signal measuring module, and the control signal output end of the main processor is connected with the control end of the receiving switching element.