Amplifier chip, amplifier module, radio frequency front-end system and radio frequency device

Abstract

The invention discloses an amplifier chip, an amplifier module, a radio frequency front-end system and a radio frequency device, and relates to the field of amplification circuits, if gain adjustment needs to be carried out on a signal currently processed by an amplifier, a second redundant port can be selected to be connected with a first redundant port according to the requirement of gain adjustment, and the gain adjustment can be carried out on the signal currently processed by the amplifier. Therefore, the starting switch in the corresponding attenuation circuit is controlled to be switched on, the attenuation network is connected with the amplifier, and the signal gain adjusting process is achieved through the attenuation network. Whether the signal gain adjusting process is carried out or not can be controlled by directly selecting the redundant port for connection, signal attenuation can be completed without an external control signal, the operation of inserting an external device in the signal gain adjusting process is avoided, insertion loss caused by connection of the external device is effectively avoided, and the signal gain adjusting efficiency is improved. The accuracy of the signal gain adjusting process is improved, the design of the whole radio frequency system is greatly simplified through the integrated design, and the complexity and the cost of the whole radio frequency system are reduced.

Description

Technical Field

[0001] The present invention relates to the field of amplifier circuits, and in particular to an amplifier chip, an amplifier module, a radio frequency front-end system and a radio frequency device. Background Art

[0002] In the field of integrated circuit design, electronic amplifiers are an important electronic component that can amplify the power of input signals to meet the needs of various electronic devices. Multiple amplifier chips may be designed in a circuit system to meet the gain requirements of electronic devices, but in the process of circuit system design, the actual gain of the circuit system as a whole will deviate from the designed gain due to the assembly between the various amplifier chips. In the prior art, the overall signal gain of the circuit system is adjusted by connecting an independent attenuator device in the circuit. When the signal gain needs to be adjusted, the attenuator is inserted into the circuit system, and the attenuator is connected to the output end of the amplifier chip by inserting an external device. The insertion of such an external device will bring additional insertion loss, resulting in a certain error in the gain of the final output signal of the circuit system. Summary of the invention

[0003] The purpose of the present invention is to provide an amplifier chip, an amplifier module, a radio frequency front-end system and a radio frequency device, which can control whether the signal gain adjustment process is carried out or not by directly selecting a redundant port for connection, and can complete signal attenuation without an external control signal, thereby avoiding the operation of inserting external devices during the signal gain adjustment process, thereby effectively avoiding the insertion loss caused by the connection of external devices, improving the accuracy of the signal gain adjustment process, and greatly simplifying the design of the entire radio frequency system through integrated design, reducing the complexity and cost of the entire radio frequency system.

[0004] In a first aspect, the present invention provides an amplifier chip, comprising:

[0005] Amplifier;

[0006] N attenuation circuits, where N is a positive integer;

[0007] at least two redundant ports, the redundant ports comprising a first redundant port and N second redundant ports connected to the N attenuation circuits in a one-to-one correspondence; the first redundant port is grounded, and the second redundant ports are respectively connected to the amplifier, the power supply and the corresponding attenuation circuit;

[0008] Wherein, the attenuation circuit comprises:

[0009] Start the switch, and connect the first end to the corresponding second redundant port;

[0010] A bias resistor, a first end of which is connected to the control end of the start switch, and a second end of which is connected to a preset voltage;

[0011] The attenuation network has a first end connected to the second end of the start switch and a second end grounded.

[0012] Optionally, also include:

[0013] N first resistors corresponding one-to-one to the N attenuation circuits, wherein first ends of the first resistors are respectively connected to the power supply and the corresponding second redundant port, and second ends are respectively connected to the amplifier and the corresponding attenuation circuit.

[0014] Optionally, the attenuation circuit further includes:

[0015] N second resistors corresponding one-to-one to the N attenuation circuits, wherein the first ends of the second resistors are connected to the power supply, and the second ends are respectively connected to the first ends of the corresponding first resistors and the corresponding second redundant ports.

[0016] Optionally, the attenuation network includes:

[0017] a third resistor, a first end of which is connected to the second end of the start switch;

[0018] The first capacitor has a first end connected to the first end of the third resistor and a second end connected to the ground.

[0019] Optionally, the attenuation circuit is arranged at the input end and / or the output end of the amplifier;

[0020] When the attenuation circuit is arranged at the input end of the amplifier, the first end of the start switch is respectively connected to the input end of the amplifier and the input port of the amplifier chip, and the output end of the amplifier is connected to the output port of the amplifier chip;

[0021] When the attenuation circuit is arranged at the output end of the amplifier, the first end of the start switch is respectively connected to the output end of the amplifier and the output port of the amplifier chip, and the input end of the amplifier is connected to the input port of the amplifier chip.

[0022] Optionally, the amplifier chip further includes a first isolation module and / or a second isolation module;

[0023] When the attenuation circuit is arranged at the input end of the amplifier, the first end of the first isolation module is connected to the input end of the amplifier, and the second end is respectively connected to the N second redundant ports and the first ends of the N start switches;

[0024] When the attenuation circuit is arranged at the output end of the amplifier, the first end of the first isolation module is connected to the output end of the amplifier, and the second end is respectively connected to the N second redundant ports and the first ends of the N start switches;

[0025] The first end of the second isolation module is respectively connected to the first ends of the N start switches, the second end of the first isolation module and the N second redundant ports.

[0026] In a second aspect, the present invention further provides an amplifier module, comprising a packaging substrate and the amplifier chip as described in the first aspect.

[0027] In a third aspect, the present invention further provides an amplifier module, comprising a packaging substrate and an amplifier chip, wherein the packaging substrate comprises:

[0028] N attenuation circuits, where N is a positive integer;

[0029] at least two redundant ports, the redundant ports comprising a first redundant port and N second redundant ports connected to the N attenuation circuits in a one-to-one correspondence; the first redundant port is grounded, and the second redundant ports are respectively connected to the amplifier, the power supply and the corresponding attenuation circuit;

[0030] Wherein, the attenuation circuit comprises:

[0031] Start the switch, and connect the first end to the corresponding second redundant port;

[0032] A bias resistor, a first end of which is connected to the control end of the start switch, and a second end of which is connected to a preset voltage;

[0033] The attenuation network has a first end connected to the second end of the start switch and a second end grounded.

[0034] In a fourth aspect, the present invention further provides a radio frequency front-end system, comprising at least one amplifier module as described in the second aspect or the third aspect, or an amplifier chip as described in the first aspect.

[0035] In a fifth aspect, the present invention further provides a radio frequency device, comprising the radio frequency front-end system as described above.

[0036] The present invention provides an amplifier chip, including N attenuation circuits and at least two redundant ports, wherein the attenuation circuit specifically includes a start switch, a bias resistor and an attenuation network. During the process of the amplifier performing signal processing, if it is necessary to perform gain adjustment on the signal currently processed by the amplifier, the second redundant port can be selected to be connected to the first redundant port according to the need for gain adjustment, thereby controlling the start switch in the corresponding attenuation circuit to be turned on, connecting the attenuation network to the amplifier, and realizing the signal gain adjustment process using the attenuation network. Whether the signal gain adjustment process is performed can be controlled directly by selecting the redundant port for connection, signal attenuation can be completed without an external control signal, and the operation of inserting an external device during the signal gain adjustment process can be avoided, thereby effectively avoiding the insertion loss caused by the connection of the external device, and improving the accuracy of the signal gain adjustment process. The design of the entire radio frequency system is greatly simplified through integrated design, and the complexity and cost of the entire radio frequency system are reduced.

[0037] The present invention also provides an amplifier module, a radio frequency front-end system and a radio frequency device, which have the same beneficial effects as the above-mentioned amplifier chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the prior art and the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 A schematic diagram of the structure of an amplifier chip provided by the present invention;

[0040] Figure 2 A schematic diagram of the structure of an amplifier chip provided by the present invention when an attenuation circuit is provided at the output end of the amplifier and no attenuation is introduced;

[0041] Figure 3 A schematic diagram of the structure of an amplifier chip provided by the present invention in which an attenuation circuit is arranged at the output end of the amplifier and attenuation is introduced;

[0042] Figure 4 It is a structural schematic diagram of an amplifier chip of the present invention when two attenuation circuits are arranged at the output end of the amplifier;

[0043] Figure 5 A schematic diagram of the structure of an amplifier chip provided by the present invention when multiple attenuation circuits are arranged at the output end of the amplifier;

[0044] Figure 6A schematic structural diagram of an amplifier chip when an attenuation circuit provided by the present invention is arranged at the input end of the amplifier. DETAILED DESCRIPTION

[0045] The core of the present invention is to provide an amplifier chip, an amplifier module, a radio frequency front-end system and a radio frequency device. Whether the signal gain adjustment process is carried out can be controlled directly by selecting a redundant port for connection. Signal attenuation can be completed without an external control signal, avoiding the operation of inserting external devices during the signal gain adjustment process, thereby effectively avoiding the insertion loss caused by the connection of external devices, improving the accuracy of the signal gain adjustment process, and greatly simplifying the design of the entire radio frequency system through integrated design, reducing the complexity and cost of the entire radio frequency system.

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of an amplifier chip provided by the present invention; wherein VCC represents the power supply, and Vf represents the preset voltage. Figure 2 , Figure 2 This is a schematic diagram of the structure of an amplifier chip provided by the present invention when an attenuation circuit is set at the output end of the amplifier and no attenuation is introduced; please refer to Figure 3 , Figure 3 The present invention provides a schematic diagram of the structure of an amplifier chip in which an attenuation circuit is provided at the output end of the amplifier and attenuation is introduced; in a first aspect, the present invention provides an amplifier chip, comprising:

[0048] Amplifier U;

[0049] N attenuation circuits 1, N is a positive integer;

[0050] At least two redundant ports, the redundant ports include a first redundant port pad1 and N second redundant ports pad2 connected to the N attenuation circuits 1 in one-to-one correspondence; the first redundant port pad1 is grounded, and the second redundant port pad2 is respectively connected to the amplifier U, the power supply and the corresponding attenuation circuit 1;

[0051] Wherein, the attenuation circuit 1 comprises:

[0052] Start the switch Q1, and connect the first end to the corresponding second redundant port pad2;

[0053] A bias resistor R0, a first end of which is connected to the control end of the start switch Q1, and a second end of which is connected to a preset voltage;

[0054] The attenuation network 11 has a first end connected to the second end of the start switch Q1 and a second end grounded.

[0055] Specifically, the amplifier chip itself is provided with an amplifier U for signal amplification. In order to achieve gain adjustment of the signal currently processed by the amplifier U and avoid problems such as attenuation error caused by insertion loss of an external attenuator, the attenuation circuit 1 composed of discrete devices is directly integrated into the amplifier chip in the present application, and a redundant port is provided to control whether the attenuation circuit 1 is connected to the circuit to introduce the attenuation process. The redundant port specifically includes a first redundant port pad1 and a second redundant port pad2. The second redundant port pad2 is connected to the attenuation circuit 1 in a one-to-one correspondence and is also connected to the power supply. The first redundant port pad1 is grounded. When a second redundant port pad2 is connected to the first redundant port pad1, the power supply is output to the first end of the start switch Q1 corresponding to the second redundant port pad2 through the connected first redundant port pad1 and the second redundant port pad2, and the start switch Q1 is controlled to be turned on. At this time, the attenuation network 11 is connected to the amplifier U through the turned-on start switch Q1, thereby introducing attenuation and attenuating the signal currently processed by the amplifier U; when the second redundant port pad2 is not connected to the first redundant port pad1, the first end of the start switch Q1 is connected to the power supply, thereby maintaining the off state, the attenuation network 11 cannot be connected to the amplifier U, no attenuation is introduced, and the attenuation network 11 and the attenuation circuit 1 do not work.

[0056] It is not difficult to understand that in order to realize the process of introducing the attenuation circuit 1 into the circuit, a bias resistor R0 connected to the control end of the start switch Q1 is set, one end of the bias resistor R0 is connected to the control end of the start switch Q1, and the other end is connected to a preset voltage, so that the control end of the start switch Q1 is always kept in the state of the preset voltage. Then, the voltage connected to the first end of the start switch Q1 is adjusted by using the connection between the first redundant port pad1 and the second redundant port pad2, and the voltage difference between the voltage at the first end of the start switch Q1 and the voltage at the control end is used to control whether the start switch Q1 is turned on or off, thereby realizing the control of whether the attenuation circuit 1 is introduced into the circuit. By setting the bias resistor R0, it is ensured that the control end of the start switch Q1 can be at an appropriate voltage relative to its first end, and that the connection between the first redundant port pad1 and the second redundant port pad2 can effectively control the on and off of the start switch Q1, avoid the flow of DC current between the control end of the start switch Q1 and the external resistor, provide DC isolation for the control end, thereby protecting the control end of the start switch Q1, and also play a certain filtering and current limiting role, reduce the influence of interference signals on the action of the start switch Q1, avoid direct exposure of the control end to the electrostatic environment, and avoid the harm caused by electrostatic discharge. The specific value of the preset voltage is not particularly limited in this application. Under normal circumstances, the second end of the bias resistor R0 can be directly grounded; the specific type, resistance value and other implementation methods of the bias resistor R0 are not particularly limited in this application. The resistance value can be appropriately large. The use of a large resistor to implement the bias resistor R0 can provide a stable DC bias for the start switch Q1.

[0057] It is understandable that the specific type, gain parameters and other implementation methods of the amplifier U in the amplifier chip are not specifically limited in this application, and can be selected and adjusted according to the actual application requirements of the amplifier chip. The specific implementation method of the redundant port is not specifically limited in this application, and it is generally implemented in the form of a pad. The specific type and implementation method of the start switch Q1 and the attenuation network 11 in the attenuation circuit 1 are not specifically limited in this application. The start switch Q1 can be implemented by using a controllable switch such as a MOS tube (Metal-Oxide-Semiconductor Field-EffectTransistor, Metal-Oxide Semiconductor Field Effect Transistor), and the attenuation network 11 only needs to be able to attenuate the signal, and can be implemented by devices such as resistors. The specific type and implementation method of the power supply are not specifically limited in this application. Generally, it will be implemented by directly reusing the power supply of the amplifier U itself, or it can be implemented by setting another power supply.

[0058] It should be noted that the number and location of the attenuation circuit 1 can be adjusted according to the actual application requirements of the amplifier U and the amplifier chip, and this application does not make any special restrictions here. Figure 4 , Figure 4 This is a schematic diagram of the structure of an amplifier chip when two attenuation circuits are set at the output end of the amplifier of the present invention; please refer to Figure 5 , Figure 5 A schematic diagram of the structure of an amplifier chip provided by the present invention when multiple attenuation circuits are set at the output end of the amplifier; when the number of attenuation circuits 1 is multiple, the number of second redundant ports pad2 is consistent with the number of attenuation circuits 1, and the second redundant ports pad2 are connected to the attenuation circuits 1 in a one-to-one correspondence. At this time, multiple attenuation circuits 1 can be implemented using a circuit structure including a start switch Q1, a bias resistor R0 and an attenuation network 11, and other circuit structures can also be additionally set. The circuit structures of each attenuation circuit 1 can be consistent or different. The specific setting method and circuit structure of each attenuation circuit 1 are not particularly limited in this application. Each start switch Q1 can also be implemented by reusing the same bias resistor R0. In order to ensure accurate control of each attenuation circuit 1, a preferred embodiment sets an independent bias resistor R0 connected to the start switch Q1 in each attenuation circuit 1. Only one first redundant port pad1 can be set, and when a certain attenuation circuit needs to be accessed, the corresponding second redundant port pad2 can be connected to the first redundant port pad1. Alternatively, N first redundant ports pad1 corresponding to N second redundant ports pad2 can be set, and when a certain attenuation circuit 1 needs to be accessed, the corresponding second redundant port pad2 can be connected to the corresponding first redundant port pad1 to avoid too many connection lines of a single first redundant port pad1. The present application does not make any special limitation on the number of first redundant ports pad1.

[0059] It is understandable that the amplifier chip will be connected to various types of signal processing systems for signal amplification, including radio frequency systems, etc. When the amplifier chip is connected to the system, it can be determined whether to connect the pad in the amplifier chip to introduce attenuation according to the difference between the total actual signal gain of the entire system and the expected signal gain, that is, whether to connect the second redundant port pad2 to the first redundant port pad1 through a gold wire to ground to introduce attenuation. At the same time, the amount of access attenuation can be adjusted by determining the number of accessed attenuation circuits 1, thereby adjusting the signal gain of the entire system and avoiding the addition of additional attenuation modules outside the system. For example, the system design engineer can decide whether to connect the pad and how many pads to connect, which can be achieved by deciding how many second redundant ports pad2 are connected to the first redundant port pad1 and grounded. Allowing users to freely choose whether to connect the pad for attenuation according to the overall gain of the entire circuit system, the second redundant port pad2 and the first redundant port pad1 are directly physically connected by means of gold wires, etc., so that the control of whether to introduce attenuation can be achieved without the need for additional control signals.

[0060] It is not difficult to understand that by integrating all the circuits of the amplifier U body, the attenuation circuit 1 and the redundant port into a die to form an amplifier chip, it is possible to realize a design of an attenuator structure integrated inside the amplifier chip, which is convenient for adjusting the signal gain, and there is no need to add an additional control terminal to introduce an additional control signal to control the attenuation; at the same time, the insertion loss existing in the prior art is avoided, and the adjustment accuracy of the attenuation circuit 1 in the signal gain adjustment process is improved to meet the high-precision application requirements. The attenuation circuit 1 structure of the present invention can be directly integrated into the amplifier chip, without the need for an additional control terminal to control the attenuation, thereby greatly simplifying the design of the entire system and reducing the complexity and cost of the entire system. The introduction of attenuation is achieved through the internal connection method, and the design of small-precision multi-bit attenuation achieves higher adjustment accuracy, thereby meeting the high-precision application requirements. In general, the attenuation structure of the present invention has the advantages of simple design, easy integration, small size, low cost and high adjustment accuracy, and can better meet the application requirements in the field of integrated circuit design, the field of electronic amplifier U technology and the field of adjustable gain equipment.

[0061] As a specific embodiment, Figure 2As shown, the start switch Q1 is implemented by a completely symmetrical MOS tube, and the entire amplifier chip mainly includes an amplifier U, a first redundant port pad1 and a second redundant port pad2 as control ports, a first resistor R1, a second resistor R2, the start switch Q1 and a bias resistor R0 in the attenuation circuit 1, a third resistor R3 and a first capacitor C1 in the attenuation network 11, and capacitors C2 and C3 that play an isolation role; the first resistor R1, the second resistor R2 and the bias resistor R0 serve as power supply resistors to provide a power supply voltage for the action of the start switch Q1, wherein the start switch Q1, the third resistor R3 that plays an attenuation role and the first capacitor C1 are connected in series to form a simple T-type attenuation structure connected in parallel. On the RF line; DC blocking capacitors C2 and C3 are distributed before and after the attenuation circuit 1, connected in series on the RF link, and connected to the drain end of the start switch Q1; the gate of the start switch Q1 is connected in series with a large resistor, the bias resistor R0, to ground, and at the same time, the second redundant port pad2 is connected in series with a large resistor, the first resistor R1, and the other end of the first resistor R1 is connected between the second capacitor C2 and the third capacitor C3 in the RF link, and at the same time, the second resistor R2 is connected between the first resistor R1 and the second redundant port pad2 to the +5V power supply; the +5V power supply is also used as the working voltage of the internal amplifier U, and is internally connected to the power supply terminal VD of the amplifier U; the first redundant port pad1 is a ground pad.

[0062] When pad2 does not make any link, such as Figure 2 As shown, the gate voltage Vg of the start switch Q1 is connected to the ground through the bias resistor R0, so Vg=0V; the drain end of the start switch Q1 is connected to VD through the first resistor R1 and the second resistor R2, so the drain voltage Vd of the start switch Q1=VD (usually 5V), and the working voltage Vgd of the start switch Q1=-VD (-5V); at this time, the start switch Q1 is in the off state, the attenuator does not work, no attenuation is introduced, and the circuit is in the through state; when the second redundant port pad2 is interconnected with the first redundant port pad1 through the gold wire, as shown Figure 3 As shown, the gate voltage Vg of the start switch Q1 is connected to the ground through the bias resistor R0, so Vg=0V; the drain end of the start switch Q1 is connected to the second redundant port pad2 through the first resistor R1, and the second redundant port pad2 is connected to the first redundant port pad1 through the gold wire. Since the first redundant port pad1 is grounded, the drain voltage Vd of the start switch Q1 is 0V, and the working voltage Vgd of the start switch Q1 is 0V; at this time, the start switch Q1 is in the on state, the attenuator starts to work, introduces attenuation, and the circuit is in the attenuation state. This attenuation scheme controls the switching of the attenuator through the state and the attenuation state by controlling whether the second redundant port pad2 is connected to the ground or not. It is suitable for system solutions that explicitly require that the second redundant port pad2 be in the attenuation state when the gold wire is grounded, and the second redundant port pad2 be in the through state when it is vacant.

[0063] The present invention provides an amplifier chip, including N attenuation circuits 1 and at least two redundant ports. The attenuation circuit 1 specifically includes a start switch Q1, a bias resistor R0 and an attenuation network 11. During the process of signal processing by the amplifier U, if it is necessary to perform gain adjustment on the signal currently processed by the amplifier U, the second redundant port pad2 can be selected to be connected with the first redundant port pad1 according to the gain adjustment requirement, so as to control the start switch Q1 in the corresponding attenuation circuit 1 to be turned on, connect the attenuation network 11 with the amplifier U, and use the attenuation network 11 to implement the signal gain adjustment process. Whether the signal gain adjustment process is performed can be controlled directly by selecting the redundant port for connection, and the signal attenuation can be completed without an external control signal, avoiding the operation of inserting an external device during the signal gain adjustment process, thereby effectively avoiding the insertion loss caused by the connection of the external device, improving the accuracy of the signal gain adjustment process, and greatly simplifying the design of the entire radio frequency system through integrated design, reducing the complexity and cost of the entire radio frequency system.

[0064] Based on the above embodiments:

[0065] As an optional embodiment, it also includes:

[0066] There are N first resistors R1 corresponding one to one with the N attenuation circuits 1 , and the first ends of the first resistors R1 are respectively connected to the power supply and the corresponding second redundant port pad2 , and the second ends are respectively connected to the amplifier U and the corresponding attenuation circuit 1 .

[0067] It is not difficult to understand that, considering that when the first redundant port pad1 and the second redundant port pad2 are not connected, the power supply will be directly connected to the first end of the start switch Q1 to provide a shutdown voltage for the start switch Q1. When the first redundant port pad1 and the second redundant port pad2 are connected, the first end of the start switch Q1 will be directly connected to the ground through the connected pad. Therefore, in order to protect the start switch Q1 and ensure the accurate operation of the start switch Q1, a first resistor R1 can be further provided between the power supply connected to the second redundant port pad2 and the first end of the start switch Q1. The first resistor R1 controls the start switch Q1 by utilizing the power supply. At the same time, since the second redundant port pad2 is connected to the power supply, the first resistor R1 set between the power supply and the first end of the start switch Q1 is also connected in series between the second redundant port pad2 and the first end of the corresponding start switch Q1, avoiding the direct connection between the first end of the start switch Q1 and the pad and the direct grounding when the first redundant port pad1 and the second redundant port pad2 are connected. The specific type of the first resistor R1, the resistance setting and other implementation methods are not specifically limited in this application. The resistance value can be appropriately large. Using a large resistor to implement the first resistor R1 can effectively protect the start switch Q1. If there are multiple attenuation circuits 1 in the system, the first resistor R1 can be added to each attenuation circuit 1, or it can be set only in some attenuation circuits 1. This application does not make any special restrictions here.

[0068] Specifically, the first resistor R1 can prevent the power supply from directly impacting the first end of the start switch Q1 and directly grounding the first end of the start switch Q1. It is arranged between the second redundant port pad2 and the first end of the start switch Q1, and can play the role of current limiting and voltage dividing to protect the start switch Q1, thereby ensuring the accuracy and reliability of the control process of the redundant port on the start switch Q1.

[0069] As an optional embodiment, the attenuation circuit 1 further includes:

[0070] N second resistors R2 correspond one-to-one to the N attenuation circuits 1 , the first ends of the second resistors R2 are connected to the power supply, and the second ends are respectively connected to the first ends of the corresponding first resistors R1 and the corresponding second redundant port pad2 .

[0071] It is understandable that, considering that when the first redundant port pad1 and the second redundant port pad2 are connected, the power supply connected to the second redundant port pad2 will be directly connected to the ground through the connected first redundant port pad1 and the second redundant port pad2, and the direct grounding of the power supply will cause excessive current, which will have a greater current impact on the second redundant port pad2 and the first redundant port pad1. In particular, when the power supply connected to the second redundant port pad2 is directly implemented by the power supply VD connected to the power supply end of the amplifier U, this power supply VD will be connected to the ground through the connected first redundant port pad1 and the second redundant port pad2, resulting in the amplifier U being unable to receive a normal power supply voltage. Therefore, in order to avoid these situations, when the power supply connected to each second redundant port pad2 is directly implemented by the power supply VD connected to the power supply end of the amplifier U, it is also necessary to add a second resistor R2 between the power supply and the second redundant port pad2. The second resistor R2 plays a role of voltage division, avoiding the direct grounding of the power supply end of the amplifier U and the power supply, and ensuring the normal operation of the amplifier U when the first redundant port pad1 and the second redundant port pad2 are connected. The present application does not make any special restrictions on the specific type, resistance setting and other implementation methods of the second resistor R2. The resistance value can be appropriately increased. Using a large resistor to implement the second resistor R2 can effectively protect the amplifier U.

[0072] Specifically, by setting the second resistor R2, direct grounding of the power supply and the power supply end of the amplifier U can be effectively avoided, further protecting the circuit. At the same time, the second resistor R2 can cooperate with the first resistor R1 to realize voltage division of the power supply, ensuring the safety and reliability of the starting switch Q1.

[0073] As an optional embodiment, the attenuation network 11 includes:

[0074] A third resistor R3, a first end of which is connected to the second end of the start switch Q1;

[0075] The first capacitor C1 has a first end connected to the first end of the third resistor R3 and a second end grounded.

[0076] It is not difficult to understand that the attenuation network 11 can be specifically implemented by a third resistor R3 and a first capacitor C1 connected in series. The third resistor R3, as an attenuation resistor, can attenuate the signal when the attenuation network 11 is connected to the amplifier U. The first capacitor C1, as a DC blocking capacitor, can not only attenuate the signal, but also improve the signal quality and reduce circuit noise. The specific type and implementation method of the third resistor R3 and the first capacitor C1 are not particularly limited in this application.

[0077] Specifically, the attenuation network 11 includes a third resistor R3 and a first capacitor C1 connected in series, and effectively realizes the signal attenuation effect through resistors and capacitors. It has a simple structure and is easy to implement. The components used are low-cost and small in size, which is conducive to the simple implementation of the entire attenuation circuit 1 and the amplifier chip.

[0078] Please refer to Figure 6 , Figure 6 This is a schematic diagram of the structure of an amplifier chip when an attenuation circuit provided by the present invention is arranged at the input end of the amplifier. As an optional embodiment, the attenuation circuit 1 is arranged at the input end and / or output end of the amplifier U;

[0079] When the attenuation circuit 1 is arranged at the input end of the amplifier U, the first end of the start switch Q1 is connected to the input end of the amplifier U and the input port of the amplifier chip respectively, and the output end of the amplifier U is connected to the output port of the amplifier chip;

[0080] When the attenuation circuit 1 is set at the output end of the amplifier U, the first end of the start switch Q1 is connected to the output end of the amplifier U and the output port of the amplifier chip respectively, and the input end of the amplifier U is connected to the input port of the amplifier chip.

[0081] It is not difficult to understand that the signal input to the amplifier U and / or the signal output from the amplifier U may have a signal gain adjustment requirement, so the attenuation circuit 1 can be set at the input end and / or output end of the amplifier U. When it is set at the input end of the amplifier U, the first end of the start switch Q1 in the attenuation circuit 1 will be directly connected to the input end of the amplifier U, which plays a role in attenuating the signal input to the amplifier U. Figure 6 As shown, at this time, the output end of the amplifier U can be directly connected to the port as the output port of the amplifier chip, and the common connection point of the input end of the amplifier U and the first end of the start switch Q1 is connected to the port as the input port of the amplifier chip; when it is set at the output end of the amplifier U, the first end of the start switch Q1 in the attenuation circuit 1 will be directly connected to the output end of the amplifier U, which plays a role in attenuating the signal output by the amplifier U. Figure 2 As shown, at this time, the input end of the amplifier U can be directly connected to the port as the input port of the amplifier chip, and the common connection point of the output end of the amplifier U and the first end of the start switch Q1 is connected to the port as the output port of the amplifier chip; when it is set at the input end and the output end of the amplifier U at the same time, at this time, at least two attenuation circuits 1 are set on the amplifier chip, and the first end of the start switch Q1 in the first attenuation circuit 1 will be directly connected to the input end of the amplifier U, and the first end of the start switch Q1 in the second attenuation circuit 1 will be directly connected to the output end of the amplifier U.

[0082] Specifically, the setting position and setting quantity of the attenuation circuit 1 can be set according to the signal gain requirements of the input and / or output ends of the amplifier U during the signal processing process. It is flexible and effective, has strong adjustability, and a wide range of applications. It can be applied to application scenarios with various signal gain requirements of the amplifier U.

[0083] As an optional embodiment, the amplifier chip further includes a first isolation module and / or a second isolation module;

[0084] When the attenuation circuit 1 is arranged at the input end of the amplifier U, the first end of the first isolation module is connected to the input end of the amplifier U, and the second end is respectively connected to the first ends of the N second redundant ports pad2 and the N start switches Q1;

[0085] When the attenuation circuit 1 is arranged at the output end of the amplifier U, the first end of the first isolation module is connected to the output end of the amplifier U, and the second end is respectively connected to the first ends of the N second redundant ports pad2 and the N start switches Q1;

[0086] The first end of the second isolation module is respectively connected to the first ends of the N start-up switches Q1 , the second end of the first isolation module, and the N second redundant ports pad2 .

[0087] In practical applications, the static voltage at the input and / or output of the amplifier U may be different from the power supply voltage connected to its own power supply end. In order to avoid the influence of the voltage change at the input or output of the amplifier U on the control process of the start switch Q1, a first isolation module can be added between the amplifier U and the first end of the start switch Q1 in the attenuation circuit 1 to avoid the influence of the static voltage change of the amplifier U on the voltage at the first end of the start switch Q1, and the voltage at the input and / or output of the amplifier U is isolated from the voltage at the first end of the start switch Q1 of the attenuation resistor.

[0088] Further, when the attenuation circuit 1 is set at the input end of the amplifier U, the output end of the amplifier U leads to a port as the output port of the entire amplifier chip, and the common connection point of the first end of the start switch Q1 and the second end of the first isolation module leads to a port as the input port of the entire amplifier chip. At this time, the input port of the amplifier chip will be connected to other devices to realize various functions; when the attenuation circuit 1 is set at the output end of the amplifier U, the input end of the amplifier U leads to a port as the input port of the entire amplifier chip, and the common connection point of the first end of the start switch Q1 and the second end of the first isolation module leads to a port as the output port of the entire amplifier chip. When the amplifier chip output port is connected to other devices to realize various functions, the voltage of the connection point between other devices and the amplifier chip may also be different from the voltage of the common connection point between the first end of the start switch Q1 and the second end of the first isolation module in the amplifier chip. In order to avoid the influence of voltage changes when connected with other devices on the normal operation of the attenuation circuit 1, a second isolation module can be further provided between the connection points of the attenuation circuit 1 and the other devices to isolate the voltage of the common connection point between the first end of the start switch Q1 and the second end of the first isolation module from the voltage between the port where the amplifier chip is connected to the external device, thereby ensuring the accurate operation of the attenuation circuit 1.

[0089] It should be noted that the present application does not specifically limit the specific types and implementation methods of the first isolation module and the second isolation module. Figure 2 As shown, the first isolation module can be implemented by capacitor C2, and the second isolation module can be implemented by capacitor C3.

[0090] Specifically, if the static voltages on the front and rear sides of the first isolation module are the same during the operation of the amplifier U, the first isolation module does not need to be set; if the static voltages on the front and rear sides of the second isolation module are the same during the operation of the amplifier chip, the second isolation module does not need to be set; by adding the first isolation module and the second isolation module, mutual interference between voltages can be effectively avoided, the signal attenuation accuracy of the attenuation circuit 1 is improved, and the accuracy and reliability of the signal gain of the entire amplifier chip and the RF system are ensured.

[0091] In a second aspect, the present invention further provides an amplifier module, comprising a packaging substrate and the amplifier chip of the first aspect.

[0092] It is not difficult to understand that the amplifier chip needs to be packaged on the packaging substrate before it can be used normally as a whole device. In this process, the amplifier, attenuation circuit and redundant port can be uniformly set in the amplifier chip and then packaged on the packaging substrate, or only the amplifier and the start switch can be set in the amplifier chip, and the discrete circuits such as the attenuation circuit and the redundant port can be directly set on the packaging substrate; or some discrete components can be directly set on the packaging substrate according to the actual application situation. The whole working process and working principle remain unchanged, and only the physical carrier of the components is different. The specific setting position and setting method of each component on the packaging substrate can be adjusted and set according to the actual application. The specific type and setting method of the packaging substrate are not particularly limited in this application.

[0093] For an introduction to an amplifier module provided by the present invention, please refer to the embodiment of the amplifier chip mentioned above, and the present invention will not be described in detail here.

[0094] In a third aspect, the present invention further provides an amplifier module, including a packaging substrate and an amplifier chip, wherein the packaging substrate includes:

[0095] N attenuation circuits, where N is a positive integer;

[0096] At least two redundant ports, the redundant ports include a first redundant port and N second redundant ports connected to the N attenuation circuits in a one-to-one correspondence; the first redundant port is grounded, and the second redundant ports are respectively connected to the amplifier, the power supply and the corresponding attenuation circuit;

[0097] The attenuation circuit includes:

[0098] Start the switch, and connect the first end to the corresponding second redundant port;

[0099] A bias resistor, a first end of which is connected to the control end of the start switch, and a second end of which is connected to a preset voltage;

[0100] The attenuation network has a first end connected to the second end of the start switch and a second end grounded.

[0101] Specifically, only the amplifier body may be provided in the amplifier chip, and the attenuation circuit and the redundant port may be directly integrated and provided on the packaging substrate. There is no need to make structural changes to the amplifier chip itself. The attenuation circuit and the redundant port may be designed and provided before packaging, which is convenient for application.

[0102] For an introduction to an amplifier module provided by the present invention, please refer to the embodiment of the amplifier chip mentioned above, and the present invention will not be described in detail here.

[0103] In a fourth aspect, the present invention further provides a radio frequency front-end system, comprising at least one amplifier module as in the second aspect or the third aspect, or an amplifier chip as in the first aspect.

[0104] Specifically, the amplifier chip is generally used in the RF front end as an RF amplification module to amplify the RF signal, etc. At the same time, the RF amplification module can be realized by multiple amplifier modules or amplifier chips connected in series. The present application does not make any special restrictions on the number of amplifier modules or amplifier chips set in the RF front-end system and other circuit modules of the RF front-end system.

[0105] For an introduction to a radio frequency front-end system provided by the present invention, please refer to the embodiments of the amplifier chip and the amplifier module mentioned above, and the present invention will not be described in detail here.

[0106] In a fifth aspect, the present invention further provides a radio frequency device, comprising the radio frequency front-end system as described above.

[0107] Specifically, an RF front-end system including an amplifier module or an amplifier chip will be arranged in an RF device as an RF front-end. The RF system will also include RF back-end, antenna and other modules. This application does not make any special limitations on the specific implementation method of the RF system.

[0108] For an introduction to a radio frequency device provided by the present invention, please refer to the embodiments of the amplifier chip, amplifier module and radio frequency front-end system described above, and the present invention will not be described in detail here.

[0109] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other. It should also be noted that in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also include elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0110] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An amplifier chip, characterized in that: include: Amplifier; N attenuation circuits, where N is a positive integer; at least two redundant ports, the redundant ports comprising a first redundant port and N second redundant ports connected to the N attenuation circuits in a one-to-one correspondence; the first redundant port is grounded, and the second redundant ports are respectively connected to the amplifier, the power supply and the corresponding attenuation circuit; Wherein, the attenuation circuit comprises: Start the switch, and connect the first end to the corresponding second redundant port; A bias resistor, a first end of which is connected to the control end of the start switch, and a second end of which is connected to a preset voltage; The attenuation network has a first end connected to the second end of the start switch and a second end grounded.

2. The amplifier chip according to claim 1, characterized in that: Also includes: N first resistors corresponding one-to-one to the N attenuation circuits, wherein first ends of the first resistors are respectively connected to the power supply and the corresponding second redundant port, and second ends are respectively connected to the amplifier and the corresponding attenuation circuit.

3. The amplifier chip according to claim 2, characterized in that: The attenuation circuit further comprises: N second resistors corresponding one-to-one to the N attenuation circuits, wherein the first ends of the second resistors are connected to the power supply, and the second ends are respectively connected to the first ends of the corresponding first resistors and the corresponding second redundant ports.

4. The amplifier chip according to claim 1, characterized in that: The attenuation network comprises: a third resistor, a first end of which is connected to the second end of the start switch; The first capacitor has a first end connected to the first end of the third resistor and a second end connected to the ground.

5. The amplifier chip according to any one of claims 1 to 4, characterized in that: The attenuation circuit is arranged at the input end and / or the output end of the amplifier; When the attenuation circuit is arranged at the input end of the amplifier, the first end of the start switch is respectively connected to the input end of the amplifier and the input port of the amplifier chip, and the output end of the amplifier is connected to the output port of the amplifier chip; When the attenuation circuit is arranged at the output end of the amplifier, the first end of the start switch is respectively connected to the output end of the amplifier and the output port of the amplifier chip, and the input end of the amplifier is connected to the input port of the amplifier chip.

6. The amplifier chip according to claim 5, characterized in that: The amplifier chip further includes a first isolation module and / or a second isolation module; When the attenuation circuit is arranged at the input end of the amplifier, the first end of the first isolation module is connected to the input end of the amplifier, and the second end is respectively connected to the N second redundant ports and the first ends of the N start switches; When the attenuation circuit is arranged at the output end of the amplifier, the first end of the first isolation module is connected to the output end of the amplifier, and the second end is respectively connected to the N second redundant ports and the first ends of the N start switches; The first end of the second isolation module is respectively connected to the first ends of the N start switches, the second end of the first isolation module and the N second redundant ports.

7. An amplifier module, characterized in that: The invention comprises a packaging substrate and the amplifier chip according to any one of claims 1 to 6.

8. An amplifier module, characterized in that: The invention comprises a packaging substrate and an amplifier chip, wherein the packaging substrate comprises: N attenuation circuits, where N is a positive integer; at least two redundant ports, the redundant ports comprising a first redundant port and N second redundant ports connected to the N attenuation circuits in a one-to-one correspondence; the first redundant port is grounded, and the second redundant ports are respectively connected to the amplifier, the power supply and the corresponding attenuation circuit; Wherein, the attenuation circuit comprises: Start the switch, and connect the first end to the corresponding second redundant port; A bias resistor, a first end of which is connected to the control end of the start switch, and a second end of which is connected to a preset voltage; The attenuation network has a first end connected to the second end of the start switch and a second end grounded.

9. A radio frequency front-end system, characterized in that: The method comprises at least one amplifier module according to claim 7 or claim 8, or an amplifier chip according to any one of claims 1 to 6.

10. A radio frequency device, characterized in that: Comprising the radio frequency front-end system as claimed in claim 9.

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