Active power splitter integrated circuit and radio frequency receiver supporting multiple communication systems

Abstract

The present invention provides an active power splitter integrated circuit and a radio frequency receiver supporting multiple communication systems. The active power splitter integrated circuit includes a radio frequency input port, a front-stage input module, and a rear-stage power splitter module. The front-stage input module includes a front-stage amplifier and a spread-spectrum switch, the spread-spectrum switch being connected in parallel to the input and output ends of the front-stage amplifier. The rear-stage power splitter module is coupled to the output end of the front-stage input module. The rear-stage power splitter module includes multiple power splitter channels connected in parallel, each power splitter channel including at least one power splitter amplifier. When the rear-stage power splitter module is operating in multiple power splitter channels, the spread-spectrum switch is closed, and the front-stage input module outputs the input radio frequency signal to the rear-stage power splitter module in full-band mode. When the rear-stage power splitter module switches from multi-channel operation to single-channel operation, the spread-spectrum switch is opened, and the front-stage amplifier processes the input radio frequency signal and outputs an in-band signal to the rear-stage power splitter module in single-channel operation.

Description

Technical Field

[0001] The present invention relates to the field of wireless communications, and in particular to an active power division integrated circuit and a radio frequency receiver supporting multiple communication systems. Background Art

[0002] With the development of communication technology, communication systems have become increasingly diversified. Communications such as 2G, 3G, 4G, Wi-Fi 6, 5G, and BT have coexisted in people's lives. Communication systems also need to be compatible with an increasing number of standards, making the systems increasingly complex and costly. As a result, the systems have increasingly stringent requirements for communication circuits. Traditional technology solutions that simply combine individual systems into multiple systems are becoming increasingly unable to meet the requirements of communication systems.

[0003] Traditional circuit implementation of multi-communication system is as follows Figure 1 As shown in the figure, the structure consists of two independent receiver systems. Each RF modulated signal is received into the signal channel through an independent antenna and RF input ports LNA_IN1 and LNA_IN2. The received RF signal is amplified by the front-end low noise amplifier 1-1, 2-1, and then converted into a digital signal through the off-chip RF filter 1-2, 2-2, RF pre-amplifier 1-3, 2-3, down converter 1-4, 2-4, intermediate frequency filter 1-5, 2-5, adjustable gain amplifier 1-6, 2-6 and analog-to-digital converter 1-7, 2-7, and then processed at the digital baseband. Figure 1 As you can see, two different communication systems require two independent input ports, LNA_IN', and two external antennas and matching networks. As the number of communication systems increases, the number of antennas and matching networks required also increases, which incurs significant cost and chip area. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides an active power division integrated circuit that can greatly reduce chip cost and area, and a radio frequency receiver that supports multiple communication systems.

[0005] In order to achieve the above-mentioned objectives, the present invention provides an active power splitter integrated circuit, which includes a radio frequency input port, a front-stage input module, and a rear-stage power splitter module. The front-stage input module includes a front-stage amplifier and a spread spectrum switch, and the spread spectrum switch is connected in parallel to the input and output ends of the front-stage amplifier. The rear-stage power splitter module is coupled to the output end of the front-stage input module, and the rear-stage power splitter module includes a plurality of power splitter channels connected in parallel, and each power splitter channel includes at least one power splitter amplifier. When the rear-stage power splitter module is in operation with multiple power splitter channels, the spread spectrum switch is closed, and the front-stage input module outputs the input radio frequency signal to the rear-stage power splitter module in full-band mode; when the rear-stage power splitter module switches from multi-channel operation to single-channel operation, the spread spectrum switch is opened, and the front-stage amplifier processes the input radio frequency signal and outputs the in-band signal to the rear-stage power splitter module in single-channel operation.

[0006] According to an embodiment of the present invention, the front-stage input module further includes a broadband spread spectrum network, which is connected in series to a spread spectrum switch, and the spread spectrum switch connects or disconnects the broadband spread spectrum network to or from the front-stage input module.

[0007] According to one embodiment of the present invention, the pre-stage input module further includes a load network, which is respectively connected to the output of the pre-stage amplifier and the spread spectrum switch. The load network adjusts the gain of the pre-stage amplifier and compensates for the parasitic capacitance generated by the power division channel being turned off.

[0008] According to an embodiment of the present invention, the load network is an RLC load including a variable capacitor array, the variable capacitor array including multiple capacitors and multiple switches, and the multiple switches connect one or more capacitors to the RLC load based on register configuration to change its capacitance value.

[0009] According to an embodiment of the present invention, each power division channel further includes a coupling capacitor, and at least one power division amplifier is coupled to the output of the pre-amplifier or the broadband spread spectrum network via the coupling capacitor.

[0010] According to one embodiment of the present invention, each power splitting channel also includes an isolation element. When the power splitting channel is switched to the off state, the isolation element connected thereto opens to release the leakage signal of the power splitting channel and isolate the influence of the signal in the power splitting channel on other channels.

[0011] According to one embodiment of the present invention, the isolation element is an isolation switch, one end of the isolation switch is connected to the output end of at least one power division amplifier, and the other end of the isolation switch is connected to the ground; when the power division channel is working normally, the isolation switch is disconnected; when the power division channel is turned off, the isolation switch is closed to release the leakage signal of the power division channel to the ground.

[0012] According to one embodiment of the present invention, the pre-amplifier is a common-source and common-gate amplifier circuit, which includes a common-source tube and a common-gate tube. The signal input end is connected to the gate of the common-source tube, and the drain of the common-gate tube serves as the output of the pre-amplifier; the broadband spread spectrum network is connected to the gate of the common-source tube and the drain of the common-gate tube through a spread spectrum open switch.

[0013] According to one embodiment of the present invention, the pre-stage input module also includes a bias circuit arranged on the input side of the pre-stage amplifier, the bias circuit includes a current source, a bias transistor and a bias isolation element, the current source and the bias transistor provide a mirror bias current for the pre-stage amplifier, and the bias isolation element is connected in series to the bias transistor and the input end of the pre-stage amplifier.

[0014] In another aspect, the present invention further provides a radio frequency receiver supporting multiple communication systems, having only a single radio frequency input port. The radio frequency receiver supporting multiple communication systems includes the aforementioned active power splitter integrated circuit and multiple communication links. The multiple communication links are respectively connected to the outputs of multiple power splitter channels within the active power splitter integrated circuit.

[0015] According to an embodiment of the present invention, each communication link includes a radio frequency preamplifier, a down converter, an intermediate frequency filter, an adjustable gain amplifier, and an analog-to-digital converter connected in sequence.

[0016] According to an embodiment of the present invention, an active power splitter integrated circuit and a plurality of communication links are integrated into a chip-level integrated circuit device.

[0017] In summary, the active power splitter integrated circuit provided by the present invention integrates the pre-stage input module and the post-stage power splitter module of the pre-stage amplifier into one. The RF signal input from a single RF input port is processed by the pre-stage input module and the post-stage power splitter module to form multiple power splitter channels that connect to the communication links of multiple systems, thereby realizing the conversion of RF signals from a single input port to multiple communication systems, greatly reducing the number of front-end antennas and matching networks of the RF input port, and achieving a significant reduction in cost and volume. In addition, the setting of the broadband spread spectrum network and spread spectrum switch in the pre-stage input module also enables the pre-stage amplifier to switch between broadband and narrowband modes, and both operating modes can be in the optimal working state.

[0018] Furthermore, the load network serves as a common load for the pre-amplifier and the broadband spread spectrum network. When adjusting the gain and output characteristics of the pre-amplifier, it can also compensate for the influence of the parasitic capacitance generated by the switching of the power division channel working mode of the post-stage power division module, thereby further optimizing the performance of the active power division integrated circuit.

[0019] In order to make the above and other objects, features and advantages of the present invention more clearly understood, preferred embodiments are given below with reference to the accompanying drawings for detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. 4 is a schematic diagram of a circuit architecture of an existing multi-communication system.

[0021] Figure 2 FIG2 is a schematic diagram of the architecture of an active power splitter integrated circuit provided by an embodiment of the present invention.

[0022] Figure 3 FIG2 is a circuit diagram of an active power splitter integrated circuit provided in accordance with an embodiment of the present invention.

[0023] Figure 4 Shown Figure 3 Schematic diagram of the structure of the variable capacitor array.

[0024] Figure 5 FIG2 is a schematic diagram of the architecture of a radio frequency receiver supporting multiple communication systems provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0025] Figure 1 The figure shows the architecture diagram of the existing multi-communication system. Figure 1 There are two communication systems in the chip, each with independent RF input ports LNA_IN1 and LNA_IN2. Therefore, two independent antennas and matching networks are required outside the system architecture, increasing the overall chip size and cost.

[0026] In view of this, this embodiment provides an active power splitter integrated circuit that can interface with multiple communication systems with only a single RF input port, thereby greatly reducing the number of antennas and matching networks at the front end of the RF input port, thereby meeting the requirements of low cost and small size.

[0027] like Figure 2 and Figure 3 As shown, the active power splitter integrated circuit 10 provided in this embodiment includes an RF input port LNA_IN, a pre-stage input module 1, and a post-stage power splitter module 2. The single RF input port LNA_IN is connected to the input of the pre-stage amplifier 11. The pre-stage input module 1 includes the pre-stage amplifier 11 and a spread-spectrum switch 14. The spread-spectrum switch 14 is connected in parallel to the input and output of the pre-stage amplifier 11. The post-stage power splitter module 2 is coupled to the output of the pre-stage input module 11. The post-stage power splitter module 2 includes multiple power splitter channels connected in parallel, each of which includes at least one power splitter amplifier. When the post-stage power splitter module 2 is operating in multiple power splitter channels, the spread-spectrum switch 14 is closed, and the pre-stage input module 1 outputs the input RF signal to the post-stage power splitter module 2 in full-band mode. When the post-stage power splitter module 2 switches from multi-channel operation to single-channel operation, the spread-spectrum switch 14 is opened, and the pre-amplifier 11 processes the input RF signal and outputs the in-band signal to the post-stage power splitter module 2 in single-channel operation.

[0028] The active power splitter integrated circuit 10 provided in this embodiment, which integrates a post-stage power splitter module, not only converts a single RF input port into multiple communication links to accommodate multiple communication systems; it also supports the operation of a single power splitter channel of the post-stage power splitter module 2 to accommodate a single communication system. In other words, the active power splitter integrated circuit 10 provided in this embodiment can be applied to both single communication system architectures with only one communication link and multi-communication system architectures with two or more communication links.

[0029] In this embodiment, the pre-stage input module 1 also includes a broadband spread spectrum network 12 and a load network 13. The broadband spread spectrum network 12 is connected in series to a spread spectrum switch 14. In other words, the broadband spread spectrum network 12 is connected in parallel to the pre-stage amplifier 11 via the spread spectrum switch 14. The broadband spread spectrum network 12 can be any combination of resistors, inductors, and capacitors; the spread spectrum switch 14 connects the broadband spread spectrum network 12 to or disconnects it from the pre-stage input module 1. The load network 13 is connected to the output terminals of the pre-stage amplifier 11 and the broadband spread spectrum network 12, respectively. The load network 13 adjusts the gain of the pre-stage amplifier 11 and compensates for parasitic capacitance generated by the power splitter channel being turned off. Figure 3 In FIG, cp1, cp2, and cp3 are used to represent the parasitic capacitance on the power divider amplifier in a single power divider channel.

[0030] In this embodiment, the spectrum spreading in the spread-spectrum switch 14 and the broadband spread-spectrum network 12 means that the pre-amplifier 11 is originally a narrow-band amplifier that can only amplify narrow-band signals; however, after the broadband spread-spectrum network 12 and the spread-spectrum switch 14 are used, the pre-amplifier 11 can amplify signals of a certain bandwidth, thereby expanding the amplification bandwidth of the pre-amplifier 11 to a certain extent.

[0031] The following will be combined Figures 3 and 4 The working principle of the active power splitter integrated circuit 10 provided in this embodiment is introduced in detail.

[0032] like Figure 3As shown, in this embodiment, the post-stage power splitter module 2 includes three power splitter channels connected in parallel, and each power splitter channel includes a power splitter amplifier and a coupling capacitor. In the power splitter channel Ch1, the power splitter amplifier 21a is coupled to the output of the pre-stage input module 1 via the coupling capacitor Ca; in the power splitter channel Ch2, the power splitter amplifier 21b is coupled to the output of the pre-stage input module 1 via the coupling capacitor Cb; and in the power splitter channel Ch3, the power splitter amplifier 21c is coupled to the output of the pre-stage input module 1 via the coupling capacitor Cc. The power splitter function implemented in this manner does not require other components on the power splitter channels, thereby greatly simplifying the module structure and size. However, the present invention does not impose any restrictions on the number of power splitter channels or the number of power splitter amplifiers in each power splitter channel. In other embodiments, the number of power splitter channels can be two or more than four. Of course, for post-stage power splitter modules with a large number of power splitter channels, some of the power splitter channels can be closed to accommodate the requirements of communication systems with fewer communication links.

[0033] Specifically, when the active power splitter integrated circuit 10 provided in this embodiment is applicable to multiple communication systems, the spread spectrum switch 14 connects the broadband spread spectrum network 12, and the input RF signal flows through the pre-amplifier 11 and the broadband spread spectrum network 12 respectively. At this point, the pre-stage input module 1 is in full-band mode. The two or three active power splitter channels within the post-stage power splitter module 2 process the full-band output signal according to the frequency band requirements of the connected communication system, obtaining the signals required by each communication system (output from Output 1, Output 2, and Output 3, respectively), thereby converting a single RF input port to multiple communication systems. In this embodiment, the multiple active power splitter channels within the post-stage power splitter module 2 collectively serve as the load for the pre-stage input module, evenly sharing the output gain of the pre-stage input module 1. However, this is not a limitation of the present invention. In other embodiments, the gains of the multiple power splitter channels may also differ.

[0034] In the post-stage power splitter module 2, parasitic capacitance exists on the power splitter amplifier within each power splitter channel. Therefore, when the power splitter channel operating state changes, such as switching from three power splitter channels to two power splitter channels, switching from three power splitter channels to a single power splitter channel, or switching from two power splitter channels to a single power splitter channel, the overall parasitic capacitance within the post-stage power splitter module 2 will change. To compensate for the parasitic capacitance caused by the switching of the power splitter channel operating state, in this embodiment, the load network 13 is configured as an RLC load including a variable capacitor array. The variable capacitor array includes multiple capacitors CC1, CC2...CCn and multiple switches SW1, SW2...SWn. The multiple switches SW1, SW2...SWn connect one or more parallel capacitors to the RLC load based on register configuration to change the capacitance value of the load network 13 so that the load network 13 and the post-stage power splitter module 2, which together serve as the load of the pre-stage input module 1, can maintain stable load performance when the power splitter channel operating state changes, so that the pre-stage input module 1 is always in the optimal working state.

[0035] like Figure 4 As shown, within the variable capacitor array, each capacitor is connected in series with its corresponding switch and then in parallel with the other switches and capacitors connected in series. Each switch controls the access state of the capacitor connected in series with it. However, the present invention does not impose any limitations on the positional arrangement of the multiple capacitors and multiple switches within the variable capacitor array. Other variable capacitor array structures that can change the load network capacitance based on register configuration are also within the scope of protection of the present invention.

[0036] When the active power splitter integrated circuit 10 provided in this embodiment is used in a single communication system, only one power splitter channel, Ch1, is in operation within the post-stage power splitter module, while power splitter channels Ch2 and Ch3 are both in the off state. To ensure excellent out-of-band rejection for the single communication system, the spread spectrum switch 14 within the pre-stage input module 1 is disconnected, disabling the broadband spread spectrum network 12 and placing the pre-stage amplifier 11 in narrowband output mode. This allows the pre-stage amplifier 11 to switch from broadband mode to narrowband mode, ensuring optimal operation even in a single communication system.

[0037] like Figure 3As shown, in this embodiment, each power splitting channel also includes an isolation element. When a power splitting channel switches to the off state, the isolation element connected to it opens to release the signal in that power splitting channel, isolating the signal within that power splitting channel from affecting other channels. Specifically, in this embodiment, the isolation elements are isolation switches sh1, sh2, and sh3. One end of the isolation switch is connected to the output of the corresponding power splitting amplifier, and the other end is connected to ground. When power splitting channel Ch3 is operating normally, isolation switch sh3 opens to cut off the path from power splitting amplifier 21c to ground, without affecting the normal operation of the power splitting channel. However, when power splitting channel Ch3 switches from the operating state to the off state, isolation switch sh3 within power splitting channel Ch3 closes, releasing the leakage signal within power splitting channel Ch3 to ground through isolation switch sh3. This effectively prevents the leakage signal within the off power splitting channel from affecting other channels, thereby significantly improving the isolation between multiple power splitting channels. Although this embodiment uses isolation switches as isolation elements, the present invention is not limited to this.

[0038] In this embodiment, the preamplifier 11 is a cascode amplifier circuit comprising a common-source transistor M4 and a common-gate transistor M5. A signal input terminal "Input" is connected to the gate of the common-source transistor M4, and a signal output terminal "Output" is electrically connected to the drain of the common-gate transistor M5. A broadband spread spectrum network 12 is connected to the gate of the common-source transistor M4 and the drain of the common-gate transistor M5 via a spread spectrum switch 13. However, the present invention does not impose any limitation on the structure of the preamplifier.

[0039] In this embodiment, the pre-stage input module 1 also includes a bias circuit 15 provided on the input side of the pre-stage amplifier 11, and the bias circuit includes a current source I3 and a bias transistor M3. The current source I3 is connected to the drain of the bias transistor M3, the source of the bias transistor M3 is grounded, and its gate is connected to the drain as the output of the bias circuit 15, providing a mirror current for the pre-stage amplifier 11. The bias isolation element is connected in series between the bias transistor M3 and the input end of the pre-stage amplifier 11. The isolation element isolates the DC bias circuit 15 from the AC RF input port LNA_IN to prevent the AC signal from affecting the bias circuit. Preferably, the isolation element is a resistor R1.

[0040] Correspondingly, such as Figure 5As shown, this embodiment also provides a radio frequency receiver supporting multiple communication systems, which has a radio frequency input port LNA_IN. The radio frequency receiver supporting multiple communication systems includes the active power splitter integrated circuit 10 provided in this embodiment and multiple communication links 201...20n, where n is an integer greater than 1. The multiple communication links 201...20n are respectively connected to the outputs of multiple power splitter channels within the active power splitter integrated circuit. In this embodiment, the radio frequency receiver supporting multiple communication systems includes two communication links 201, 202, and the two communication links 201, 202 are respectively connected to the power splitter channels Ch1, Ch2 of the subsequent power splitter module 2. At this time, the power splitter channel Ch3 within the subsequent power splitter module 2 will be in the off state and the isolation switch sh3 connected thereto will be in the closed state.

[0041] like Figure 5 As shown, each communication link includes an RF preamplifier (RFA), a downconverter (MIXER), an intermediate frequency (IF) filter, an adjustable gain amplifier (VGA), and an analog-to-digital converter (ADC), all connected in sequence. The RF preamplifier (RFA) connects to the power splitter channel, further amplifies the power-divided signal, and then connects it to the downconverter (MIXER). The IF filter selects the intermediate frequency (IF) signal and filters out the IF signal within the bandwidth required for demodulation. This IF signal is amplified by the adjustable gain amplifier (VGA) and provides appropriate signal strength to the analog-to-digital converter (ADC), which converts the IF analog signal into a digital signal.

[0042] In this embodiment, the high-isolation active power splitter integrated circuit 10 and the two communication links 201 and 202 are integrated into a chip-level integrated circuit device; this arrangement further improves the integration of the system architecture while achieving the functions of low cost and miniaturization of the chip, and can be adapted to single-channel or multi-channel communication systems at the same time, with very good compatibility.

[0043] In summary, the active power splitter integrated circuit provided by the present invention integrates the pre-stage input module and the post-stage power splitter module of the pre-stage amplifier into one. The RF signal input from a single RF input port is processed by the pre-stage input module and the post-stage power splitter module to form multiple power splitter channels that connect to the communication links of multiple systems, thereby realizing the conversion of RF signals from a single input port to multiple communication systems, greatly reducing the number of front-end antennas and matching networks of the RF input port, and achieving a significant reduction in cost and volume. In addition, the setting of the broadband spread spectrum network and spread spectrum switch in the pre-stage input module also enables the pre-stage amplifier to switch between broadband and narrowband modes, and both operating modes can be in the optimal working state.

[0044] Furthermore, the load network serves as a common load for the pre-amplifier and the broadband spread spectrum network. When adjusting the gain and output characteristics of the pre-amplifier, it can also compensate for the influence of the parasitic capacitance generated by the switching of the power division channel working mode of the post-stage power division module, thereby further optimizing the performance of the active power division integrated circuit.

[0045] Although the present invention has been disclosed above by means of preferred embodiments, this is not intended to limit the present invention. Anyone skilled in the art may make slight changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of protection required by the claims.

Claims

1. An active power splitter integrated circuit, characterized in that: include: a radio frequency input port; The front-stage input module includes a front-stage amplifier and a spread-spectrum switch. The RF input port is connected to the input end of the front-stage amplifier. The spread-spectrum switch is connected in parallel to the input and output ends of the front-stage amplifier. The front-stage input module also includes a load network and a broadband spread-spectrum network. The broadband spread-spectrum network is connected in series to the spread-spectrum switch. The spread-spectrum switch connects the broadband spread-spectrum network to or disconnects it from the front-stage input module. The load network is connected to the output of the preamplifier and the spread spectrum switch respectively. The load network is connected to one or more parallel capacitors based on the register configuration to adjust the gain of the preamplifier and compensate for the parasitic capacitance generated by the power splitter channel being turned off. A rear-stage power division module is coupled to the output end of the front-stage input module, wherein the rear-stage power division module includes a plurality of power division channels connected in parallel and each power division channel includes at least one power division amplifier; When the subsequent power splitter module is working in multiple power splitter channels, the spread spectrum switch is closed, and the previous input module outputs the input RF signal to the subsequent power splitter module in full-band mode; When the post-stage power splitter module switches from multi-channel operation to single-channel operation, the spread spectrum switch is disconnected, and the pre-stage amplifier processes the input RF signal and outputs the in-band signal to the post-stage power splitter module in single-channel operation; Each power splitting channel further includes an isolation element. When the power splitting channel switches to the off state, the isolation element connected thereto opens to release the leakage signal of the power splitting channel and isolate the influence of the signal in the power splitting channel on other channels. The isolation element is an isolation switch, one end of which is connected to the output end of at least one power splitting amplifier, and the other end of the isolation switch is connected to ground. When the power splitting channel is operating normally, the isolation switch is opened. When the power division channel is turned off, the isolation switch is closed to release the leakage signal of the power division channel to the ground.

2. The active power splitter integrated circuit according to claim 1, characterized in that: The load network is an RLC load including a variable capacitor array. The variable capacitor array includes multiple capacitors and multiple switches. The multiple switches connect one or more capacitors to the RLC load based on register configuration to change the capacitance value thereof.

3. The active power splitter integrated circuit according to claim 1, characterized in that: Each power division channel further includes a coupling capacitor, and at least one power division amplifier is coupled to the output of the pre-amplifier or the broadband spread spectrum network via the coupling capacitor.

4. The active power splitter integrated circuit according to claim 1, characterized in that: The pre-amplifier is a common-source common-gate amplifier circuit, which includes a common-source transistor and a common-gate transistor. The signal input end is connected to the gate of the common-source transistor, and the drain of the common-gate transistor serves as the output of the pre-amplifier. The broadband spread spectrum network is connected to the gate of the common source tube and the drain of the common gate tube through a spread spectrum switch.

5. The active power splitter integrated circuit according to claim 1, characterized in that: The pre-stage input module also includes a bias circuit arranged on the input side of the pre-stage amplifier. The bias circuit includes a current source, a bias transistor and a bias isolation element. The current source and the bias transistor provide a mirror bias current for the pre-stage amplifier. The bias isolation element is connected in series to the bias transistor and the input end of the pre-stage amplifier.

6. A radio frequency receiver supporting multiple communication systems, characterized in that: It has only one radio frequency input port, and the radio frequency receiver supporting multiple communication systems includes: The active power splitter integrated circuit according to any one of claims 1 to 5; The plurality of communication links are respectively connected to the outputs of the plurality of power division channels in the active power division integrated circuit.

7. The radio frequency receiver supporting multiple communication systems according to claim 6, wherein: Each communication link includes a radio frequency preamplifier, a down converter, an intermediate frequency filter, an adjustable gain amplifier, and an analog-to-digital converter connected in sequence.

8. The radio frequency receiver supporting multiple communication systems according to claim 6, wherein: The active power division integrated circuit and multiple communication links are integrated into a chip-level integrated circuit device.

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