Radio frequency chip and electronic equipment

Abstract

The embodiment of the invention provides a radio frequency chip and electronic equipment. The radio frequency chip comprises a first baseband circuit, a second baseband circuit and at least one signal processing link, the signal processing link comprises an orthogonal frequency conversion module and a receiving and transmitting amplification module; the receiving and transmitting amplification module is used for amplifying the signal and receiving and transmitting the signal through an external antenna end; the orthogonal frequency conversion module is respectively connected with the first baseband circuit and the second baseband circuit; the orthogonal frequency conversion module is used for adjusting the frequency of the input signal; and the first baseband circuit and the second baseband circuit are respectively connected with an external circuit of the radio frequency chip and are respectively used for processing signals input into the baseband circuit. According to the radio frequency chip provided by the invention, through framework innovation, the signal receiving and transmitting functions are integrated in the same radio frequency chip, and half-duplex communication can be realized; the integration of the radio frequency chip is realized through the common baseband circuit; and multi-band coverage can be realized through flexible configuration of a signal processing link.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular, to a radio frequency chip and an electronic device. Background Art

[0002] With the rapid development of modern communication technologies, the demand for multi-functional integration, miniaturization, low power consumption, and low cost of radio devices is becoming more urgent. To meet the needs of the development of radio devices, as the core component of radio devices, the radio frequency channel processing system needs to have characteristics such as wide-band coverage, flexible reconfigurability, high integration, and high energy efficiency ratio. However, the implementation methods and technical architectures of traditional radio frequency channel processing systems have significant limitations, restricting the performance improvement and intensive development of radio devices.

[0003] As the core of the radio frequency channel processing system, a traditional radio frequency channel link is usually built by multiple discrete radio frequency receiving chips, transmitting chips, and peripheral circuits. Such a discrete architecture needs to cascade multiple chips to implement signal transceiver and processing functions, resulting in a large link volume, high power consumption, and a significant increase in hardware complexity. In addition, the frequency band coverage range of the devices in the discrete architecture is limited, making it difficult to support the wide-band reconfigurability requirement, and the impedance matching and signal isolation performance between the devices are poor, further reducing the flexibility and reliability of the communication system. These problems seriously limit the application of radio devices in scenarios of miniaturization and multi-functional integration. Summary of the Invention

[0004] Embodiments of the present disclosure provide a radio frequency chip and an electronic device to solve the problems of discrete transceiver chips, circuit structure load, large volume, high power consumption, and limited frequency band coverage range in the radio frequency channel link.

[0005] Based on the above problems, in a first aspect, embodiments of the present disclosure provide a radio frequency chip, including: a first baseband circuit, a second baseband circuit, and at least one signal processing link; The signal processing link includes: a quadrature frequency conversion module and a transceiver amplification module; A first end of the transceiver amplification module is connected to an external antenna end of the radio frequency chip; a second end and a third end of the transceiver amplification module are respectively connected to the quadrature frequency conversion module; the transceiver amplification module is configured to amplify a signal and receive and transmit the signal through the external antenna end; The quadrature frequency conversion module is respectively connected to the first baseband circuit and the second baseband circuit; the quadrature frequency conversion module is configured to adjust the frequency of an input signal; The first baseband circuit and the second baseband circuit are respectively connected to an external circuit of the radio frequency chip; and are respectively configured to process a signal input to the baseband circuit.

[0006] In combination with the first aspect, in one possible implementation, the RF chip switches its operating mode according to the host computer signal; wherein, the operating modes include: a receiving mode and a transmitting mode; The transceiver amplifier module is configured to receive and amplify a first signal transmitted from the external antenna terminal when the RF chip is in the receiving mode; the first signal is processed by the transceiver amplifier module, the quadrature frequency conversion module, the first baseband circuit, and the second baseband circuit and then output as a first baseband quadrature signal; The first baseband circuit and the second baseband circuit are configured to receive a second baseband quadrature signal transmitted from an external circuit of the RF chip when the RF chip is in the transmitting mode; the second baseband quadrature signal is processed by the first baseband circuit, the second baseband circuit, the quadrature frequency conversion module, and the transceiver amplifier module and then output as a second signal.

[0007] In combination with the first aspect, in one possible implementation, the transceiver amplifier module includes: a signal switching device, a first amplifier, and a second amplifier; The first end of the signal switching device is connected to the external antenna terminal of the RF chip; The second end of the signal switching device is connected to the input terminal of the first amplifier; The third end of the signal switching device is connected to the output terminal of the second amplifier; The output terminal of the first amplifier is connected to the quadrature frequency conversion module. The first amplifier is configured to adjust the received first signal into a first differential signal and transmit it to the quadrature frequency conversion module when the first end and the second end of the signal switching device are conducted; The input terminal of the second amplifier is connected to the quadrature frequency conversion module. The first amplifier is configured to adjust the received second differential signal into the second signal when the first end and the third end of the signal switching device are conducted.

[0008] In combination with the first aspect, in one possible implementation, the transceiver amplifier module is configured to convert the received first signal into the first differential signal and transmit it to the quadrature frequency conversion module when the RF chip is in the receiving mode; The quadrature frequency conversion module is configured to mix the first differential signal with a local oscillator quadrature differential signal and then output a first quadrature differential signal to the first baseband circuit and the second baseband circuit; The first baseband circuit and the second baseband circuit are configured to adjust the first quadrature differential signal to obtain the first baseband quadrature signal; and output the first baseband quadrature signal to an external circuit of the RF chip.

[0009] In combination with the first aspect, in a possible implementation manner, the first baseband circuit and the second baseband circuit are configured to, when the radio frequency chip is in the transmission mode, respectively adjust the received second baseband quadrature signal into a second quadrature differential signal and then output it to the quadrature frequency conversion module; The quadrature frequency conversion module is configured to convert the second quadrature differential signal and then output the second differential signal; The transceiver amplifier module is configured to obtain the second signal according to the second differential signal and then output it to the external antenna terminal of the radio frequency chip.

[0010] In combination with the first aspect, in a possible implementation manner, the signal switching device is configured to switch the conduction states of the first amplifier and the second amplifier according to the radio frequency chip state; Wherein, when the radio frequency chip is in the receiving state, the first amplifier is turned on and the second amplifier is turned off; the first signal is input into the signal switching device through the first end of the signal switching device and output to the first amplifier through the signal switching device; When the radio frequency chip is in the transmission state, the second amplifier is turned on and the first amplifier is turned off; the second signal obtained through the second amplifier is input into the signal switching device through the third end of the signal switching device.

[0011] In combination with the first aspect, in a possible implementation manner, the quadrature frequency conversion module includes: a quadrature signal generation circuit, a first quadrature mixer, and a second quadrature mixer; The first end of the first quadrature mixer is connected to the first amplifier, the second end of the first quadrature mixer is connected to the first baseband circuit, and the third end of the first quadrature mixer is connected to the second baseband circuit; The first end of the second quadrature mixer is connected to the second amplifier, the second end of the second quadrature mixer is connected to the first baseband circuit, and the third end of the second quadrature mixer is connected to the second baseband circuit; The quadrature signal generation circuit is respectively connected to the first quadrature mixer and the second quadrature mixer; The quadrature signal generation circuit is configured to obtain four local oscillator quadrature differential signals according to the input local oscillator signal and respectively output them to the first quadrature mixer and the second quadrature mixer; The first quadrature mixer is configured to, when the radio frequency chip is in the receiving mode, receive the first differential signal output by the transceiver amplifier module, and mix it with the local oscillator quadrature differential signal to obtain a first quadrature differential signal; The second quadrature mixer is configured to receive a second quadrature differential signal when the radio frequency chip is in the transmission mode, and mix it with the local oscillator quadrature differential signal to obtain a second differential signal.

[0012] In a possible implementation manner in combination with the first aspect, the first baseband circuit and the second baseband circuit each include a plurality of signal processing devices, and the plurality of signal processing devices at least include: a filter, a third amplifier, and an attenuator; The filter is configured to filter out noise signals in the signals input to the baseband circuit where it is located; The third amplifier is arranged at the last stage of the baseband circuit where it is located, and is configured to amplify the signal and output it outside the radio frequency chip; The attenuator is configured to attenuate the signal input to the baseband circuit where it is located according to a preset step signal.

[0013] In a possible implementation manner in combination with the first aspect, the first baseband circuit and the second baseband circuit further each include: a feedback circuit, a fourth amplifier, a first equalizer, and a second equalizer; The feedback circuit is configured to feedback the signal between the input end and the output end of the baseband circuit where it is located; The fourth amplifier is configured to amplify the signal input to the baseband circuit where it is located; The first equalizer and the second equalizer are configured to boost the high-frequency gain of the signal input to the baseband circuit where they are located.

[0014] A second aspect of the embodiments of the present disclosure provides an electronic device, including: the radio frequency chip according to any one of the first aspect.

[0015] The beneficial effects of the embodiments of the present disclosure include: A radio frequency chip and an electronic device provided by an embodiment of the present disclosure include: a first baseband circuit, a second baseband circuit, and at least one signal processing link; the signal processing link includes: a quadrature frequency conversion module and a transceiver amplification module; a first end of the transceiver amplification module is connected to an external antenna end of the radio frequency chip; a second end and a third end of the transceiver amplification module are respectively connected to the quadrature frequency conversion module; the transceiver amplification module is configured to amplify signals and receive and transmit signals through the external antenna end; the quadrature frequency conversion module is respectively connected to the first baseband circuit and the second baseband circuit; the quadrature frequency conversion module is configured to adjust the frequency of an input signal; the first baseband circuit and the second baseband circuit are respectively connected to an external circuit of the radio frequency chip, and are respectively configured to process signals input to the baseband circuit. The radio frequency chip provided by the present disclosure integrates two functions of signal transceiver in the same radio frequency chip through architecture innovation, and can achieve half-duplex communication; and realizes the integration of the radio frequency chip by sharing the baseband circuit; and can also achieve multi-band coverage through flexible configuration of the signal processing link. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a radio frequency chip provided by an embodiment of the present disclosure; Figure 2 It is a schematic structural diagram of the transceiver amplification module provided by an embodiment of the present disclosure; Figure 3 It is a schematic structural diagram of the quadrature frequency conversion module provided by an embodiment of the present disclosure; Figure 4 It is a schematic structural diagram of a baseband circuit provided by an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] An embodiment of the present disclosure provides a radio frequency chip and an electronic device. The preferred embodiments of the present disclosure are described below with reference to the accompanying drawings of the specification. It should be understood that the preferred embodiments described herein are only for the purpose of illustration and explanation of the present disclosure, and are not intended to limit the present disclosure. And without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0018] An embodiment of the present disclosure provides a radio frequency chip, including: a first baseband circuit, a second baseband circuit, and at least one signal processing link; The signal processing link includes: a quadrature frequency conversion module and a transceiver amplification module; A first end of the transceiver amplification module is connected to an external antenna end of the radio frequency chip; a second end and a third end of the transceiver amplification module are respectively connected to the quadrature frequency conversion module; the transceiver amplification module is configured to receive and transmit signals through the external antenna; The quadrature frequency conversion module is respectively connected to the first baseband circuit and the second baseband circuit; the quadrature frequency conversion module is configured to adjust the frequency of an input signal; The first baseband circuit and the second baseband circuit are respectively connected to the external circuit of the radio frequency chip, and are respectively used to process the signals input to the baseband circuit.

[0019] In the embodiments of the present disclosure, the provided radio frequency chip can be applied to a radio device. The radio frequency chip adopts a differential structure I / Q zero intermediate frequency architecture, and realizes the integration of multiple functions such as signal filtering, amplification, attenuation, up-conversion, and down-conversion. It can work in a half-duplex communication mode and realize the receiving and transmitting functions through one chip. The above radio frequency chip can be produced based on a silicon-based process.

[0020] The radio frequency chip provided by the present disclosure can realize the receiving and transmitting functions of radio frequency signals. Its structure can include a signal processing link part and a baseband circuit part. Among them, the signal processing link part includes at least one signal processing link, and one end of the signal processing link is connected to an antenna terminal outside the chip (for example, the antenna of a radio device). The radio frequency signal received by the radio device antenna is input to the radio frequency chip through one end of the signal processing link. The radio frequency chip converts the radio frequency signal into a signal that can be recognized by the radio device through processing such as single conversion difference and down-conversion, so as to realize signal reception. The baseband signal to be sent by the radio device (that is, the second baseband quadrature signal in the present disclosure) is transmitted from the external circuit of the radio frequency chip to the baseband circuit part and input to the radio frequency chip. After the radio frequency chip performs operations such as up-conversion on the baseband signal, the corresponding radio frequency signal is obtained and output to the antenna of the radio device through one end of the signal processing link, so as to realize signal transmission. Among them, the external circuit of the radio frequency chip can be a control and processing unit of the radio device (for example, a microprocessor and a digital signal processor, etc.).

[0021] For radio devices that need to cover multiple frequency bands, a radio frequency chip that can process multi-band signals is required. The radio frequency chip provided by the embodiments of the present disclosure can be provided with signal processing links for multiple different frequency bands. The structure of each signal processing link is the same, but the components therein can be applicable to different operating frequency bands. Each signal link can share the baseband circuit and the local oscillator signal. It realizes the coverage of a multi-band range by a single radio frequency chip and realizes the integration of the chip.

[0022] As Figure 1 shown, the present disclosure provides a radio frequency chip covering the S-Ku frequency band as an example, which includes two signal processing links 3, a first baseband circuit 1, and a second baseband circuit 2. Each signal processing link 3 includes a transceiver amplification module 31 and a quadrature frequency conversion module 32. Among them, one signal processing link 3 is used to process signals in the S frequency band and the C frequency band, and the frequency range is , the signal processing link 3 is connected to the corresponding antenna terminal through the port RF_L. Another signal processing link 3 is used to process signals in the X band and Ku band, and the frequency range is , the signal processing link 3 is connected to the corresponding antenna terminal through the port RF_H. The local oscillator signal is input into the two quadrature frequency conversion modules 32 through the port LO respectively.

[0023] The radio frequency chip may further include a standard serial-to-parallel conversion interface (SPI, Serial Peripheral Interface), a reference power supply module (BGR, Bandgap Reference), a DC offset compensation module (DCOC, DC Offset Cancellation), and a second-order compensation module (IP2OC, Input Second-Order Intercept Point Offset Calibration).

[0024] Among them, the BGR is a circuit module that generates a stable reference voltage for the radio frequency chip; the DCOC is used to eliminate the DC bias in the signal chain; the IP2OC can calibrate the second-order intermodulation interference in the zero-IF architecture; the SPI is used to enable short-distance data transmission between the radio frequency chip and other peripheral devices. In the embodiments of the present disclosure, other peripheral devices may include the host computer of the radio frequency chip.

[0025] In another embodiment provided by the present disclosure, the radio frequency chip switches the working mode according to the host computer signal; wherein, the working modes include: a receiving mode and a transmitting mode; A transceiver amplification module, configured to receive and amplify a first signal transmitted from an external antenna terminal when the radio frequency chip is in the receiving mode; the first signal is processed by the transceiver amplification module, the quadrature frequency conversion module, the first baseband circuit, and the second baseband circuit and then output as a first baseband quadrature signal; The first baseband circuit and the second baseband circuit are configured to receive a second baseband quadrature signal transmitted from an external circuit of the radio frequency chip when the radio frequency chip is in the transmitting mode; the second baseband quadrature signal is processed by the quadrature frequency conversion module and the transceiver amplification module and then output as a second signal.

[0026] In the embodiments of the present disclosure, the host computer of the radio frequency chip may be a controller in a radio device, and the controller may send a control signal (i.e., the host computer signal) through the SPI to control the working mode of the radio frequency chip.

[0027] The first signal may be a radio frequency signal received at the antenna terminal of the radio device (i.e., the external antenna terminal of the above-mentioned radio frequency chip). The antenna inputs the received first signal into the radio frequency chip connected to the antenna. After demodulation by the radio frequency chip, a first baseband quadrature signal containing target information (such as voice and data, etc.) is extracted from the high-frequency first signal. It should be noted that the first baseband quadrature signal may be a signal in the form of orthogonal decomposition, which may include two signal components, and each signal component can be transmitted in the form of a differential signal pair. The first baseband quadrature signal may be a low-frequency signal.

[0028] The second baseband quadrature signal may be the information that the radio device needs to send. After the second quadrature signal is input into the radio frequency chip and modulated by the radio frequency chip, the second quadrature signal is up-converted to a high-frequency carrier signal (i.e., the second signal). The second signal is output to the antenna connected to the radio frequency chip and transmitted by the antenna to achieve long-distance signal transmission. It should be noted that the second baseband quadrature signal may be a signal that directly carries the original information (such as voice, data, and images to be sent, etc.), and its form may be a low-frequency signal in the form of orthogonal decomposition. This signal may include two signal components, and each signal component can be transmitted in the form of a differential signal pair.

[0029] In another embodiment provided by the present disclosure, as Figure 2 shown, the transceiver amplification module includes: a signal switching device 311, a first amplifier 312, and a second amplifier 313; The first end 314 of the signal switching device is connected to the external antenna terminal of the radio frequency chip; The second end 315 of the signal switching device is connected to the input end of the first amplifier 312; The third end 316 of the signal switching device is connected to the output end of the second amplifier 313; The output end of the first amplifier 312 is connected to the quadrature frequency conversion module; the first amplifier 312 is used to adjust the received first signal to a first differential signal and transmit it to the quadrature frequency conversion module when the first end and the second end of the signal switching device are conducting; The input end of the second amplifier 313 is connected to the quadrature frequency conversion module; the second amplifier 313 is used to adjust the received second differential signal to a second signal when the first end and the third end of the signal switching device are conducting.

[0030] In the embodiments of the present disclosure, the signal switching device 311 may be a component that changes the internal signal path according to an external enable signal. In practical applications, this function can be implemented by a field effect transistor (FET, Field Effect Transistor) or a heterojunction bipolar transistor (HBT, Heterojunction Bipolar Transistor), etc. This is only for illustration and not limitation. The signal switching device 311 may include three connection ports. Among them, the first end 314 of the signal switching device is connected to the antenna end outside the chip. In the receiving mode, the first signal can be input into the signal switching device 311 through the first end, and output from the second end 315 of the signal switching device to the input end of the first amplifier 312.

[0031] The first amplifier 312 may be a low-noise amplifier, which can reduce the noise signal introduced by itself while maintaining signal integrity, can collect extremely low-intensity signals, and improve the sensitivity of the receiving system; at the same time, it can also convert a single-ended signal into a differential signal. In the present disclosure, the first amplifier 312 can perform an operation of converting the received first signal from a single-ended signal to a differential signal, and obtain a first differential signal after amplification.

[0032] The input end of the second amplifier 313 is connected to the quadrature frequency conversion module. In the transmitting mode, it receives the second differential signal generated by the quadrature frequency conversion module and converts the second differential signal into a single-ended radio frequency signal (i.e., the second signal). The second amplifier 313 may be a power amplifier, which can amplify the input signal, convert the differential signal into a single-ended signal, and provide sufficient power for the output signal to drive the load. The second signal output by the second amplifier 313 is input into the third end of the signal switching device 311, and output to the antenna end outside the chip through the first end 314 of the signal switching device.

[0033] In another embodiment provided by the present disclosure, the transceiver amplification module is configured to adjust the received first signal into a first differential signal and transmit it to the quadrature frequency conversion module when the radio frequency chip is in the receiving mode; The quadrature frequency conversion module is configured to mix the first differential signal with the local oscillator quadrature differential signal and output a first quadrature differential signal to the first baseband circuit and the second baseband circuit; The first baseband circuit and the second baseband circuit are configured to adjust the first quadrature differential signal to obtain a first baseband quadrature signal; and output the first baseband quadrature signal to the external circuit of the radio frequency chip.

[0034] In an embodiment of the present disclosure, when the radio frequency chip is in the receiving mode, the quadrature frequency conversion module receives the first differential signal sent by the transceiver amplifier module. Among them, the differential signal can be a pair of signals composed of two signals with a phase difference of 180°. After the first differential signal is input into the quadrature frequency conversion module, it is mixed with the local oscillator quadrature differential signal to achieve quadrature down-conversion and generate the first quadrature differential signal. Among them, the quadrature differential signal can be composed of an in-phase component and a quadrature component. The amplitudes of these two signal components are equal, and they maintain a phase difference of 90°. Each signal component can be transmitted using a differential signal pair.

[0035] The quadrature frequency conversion module transmits the two signal components in the generated first quadrature differential signal to the first baseband circuit and the second baseband circuit respectively. Each baseband circuit can respectively perform gain adjustment, low-pass filtering, and amplification on the input signal component in the baseband frequency part, and respectively output a processed signal component. The two signal components output by the first baseband circuit and the second baseband circuit can form a group of quadrature differential signals, and this group of quadrature differential signals is the first baseband quadrature signal. The first baseband quadrature signal is output outside the radio frequency chip and can be used as a signal that can be recognized by other components in the radio device, thereby realizing the reception of radio frequency signals.

[0036] In another embodiment provided by the present disclosure, the first baseband circuit and the second baseband circuit are used to respectively adjust the received second baseband quadrature signal to a second quadrature differential signal and output it to the quadrature frequency conversion module when the radio frequency chip is in the transmitting mode; The quadrature frequency conversion module is used to frequency-convert the second quadrature differential signal and output a second differential signal; The transceiver amplifier module is used to obtain a second signal based on the second differential signal and output it to the external antenna terminal of the radio frequency chip.

[0037] In an embodiment of the present disclosure, when the radio frequency chip is in the transmitting mode, the first baseband circuit and the second baseband circuit perform amplitude adjustment, low-pass filtering, and amplification on the received second baseband quadrature signal to obtain a second quadrature differential signal, and output the second quadrature differential signal to the quadrature frequency conversion module. Among them, the second baseband quadrature signal can be a signal generated by the radio device and ready to be sent to other radio devices.

[0038] It should be noted that the second baseband quadrature signal can be an orthogonal signal composed of two signal components transmitted in the form of a differential signal pair. The two signal components can be generated by a signal generation unit in the radio device and respectively input into the two baseband circuits.

[0039] The quadrature frequency conversion module up-converts the received second quadrature differential signal to the radio frequency, converts it into a second differential signal, and outputs the second differential signal to the transceiver amplifier module.

[0040] The transceiver amplification module inputs the received second differential signal into the second amplifier 313, amplifies the second differential signal and converts it into a single-ended radio frequency signal (i.e., the second signal), and then outputs it to the antenna terminal outside the radio frequency chip to achieve signal transmission.

[0041] In another embodiment provided by the present disclosure, the signal switching device 311 is configured to switch the conduction states of the first amplifier 312 and the second amplifier 313 according to the state of the radio frequency chip; Wherein, when the radio frequency chip is in the receiving state, the first amplifier 312 is turned on and the second amplifier 313 is turned off; the first signal is input into the signal switching device 311 through the first end 314 of the signal switching device, and is output from the signal switching device 311 to the first amplifier 312; When the radio frequency chip is in the transmitting state, the second amplifier 313 is turned on and the first amplifier 312 is turned off; the second signal obtained through the second amplifier 313 is input into the signal switching device 311 through the third end of the signal switching device 311.

[0042] In the embodiment of the present disclosure, the radio frequency chip can change its own working mode according to the host computer signal. When the radio frequency chip is in the receiving mode, the first end 314 and the second end of the signal switching device are turned on, and the connection from the first end 314 to the third end of the signal switching device is turned off, so that the first amplifier 312 is turned on and the second amplifier 313 is turned off. The first signal received by the external antenna terminal of the radio frequency chip is input into the first amplifier 312 through the signal switching device 311.

[0043] When the radio frequency chip is in the transmitting mode, the first end 314 and the third end of the signal switching device are turned on, and the connection from the first end 314 to the second end of the signal switching device is turned off, so that the first amplifier 312 is turned off and the second amplifier 313 is turned on. The second amplifier 313 is connected to the antenna terminal outside the chip, and the second signal output by the second amplifier 313 is output to the antenna terminal outside the chip through the signal switching device 311 to achieve signal transmission.

[0044] In another embodiment provided by the present disclosure, as Figure 3 shown, the quadrature frequency conversion module includes: a quadrature signal generation circuit 321, a first quadrature mixer 322, and a second quadrature mixer 323; The first end 324 of the first quadrature mixer is connected to the first amplifier 312, the second end 326 of the first quadrature mixer is connected to the first baseband circuit, and the third end 327 of the first quadrature mixer is connected to the second baseband circuit; The first end 325 of the second quadrature mixer is connected to the second amplifier 313, the second end 328 of the second quadrature mixer is connected to the first baseband circuit, and the third end 329 of the second quadrature mixer is connected to the second baseband circuit; The quadrature signal generation circuit 321 is respectively connected to the first quadrature mixer 322 and the second quadrature mixer 323; The quadrature signal generation circuit 321 is configured to obtain four local oscillator quadrature differential signals according to the input local oscillator signal, and output them to the first quadrature mixer 322 and the second quadrature mixer 323 respectively; The first quadrature mixer 322 is configured to receive the first differential signal output by the transceiver amplifier module when the RF chip is in the receiving mode, and mix it with the local oscillator quadrature differential signal to obtain the first quadrature differential signal; The second quadrature mixer 323 is configured to receive the second quadrature differential signal when the RF chip is in the transmitting mode, and mix it with the local oscillator quadrature differential signal to obtain the second differential signal.

[0045] In the embodiments of the present disclosure, the quadrature signal generation circuit 321 may first convert the input local oscillator signal into a differential signal, and then the quadrature signal generation circuit 321 converts the differential signal into four local oscillator quadrature differential signals. Among them, the method of converting the local oscillator signal into a differential signal may adopt methods such as balun conversion; the quadrature signal generation circuit 321 may adopt a multi-stage polyphase filter structure.

[0046] Optionally, since the forward signal generation process may cause certain losses to the input signal, a corresponding driver amplifier may be cascaded after the quadrature signal generation circuit 321 to compensate for the losses generated during the quadrature signal generation process, and ensure that the local oscillator quadrature differential signal output by the quadrature signal generation circuit 321 can reach the required amplitude.

[0047] Further, when the RF chip is in the receiving mode, the first quadrature mixer 322 uses the frequency addition and subtraction characteristics of the input high-frequency differential signal (i.e., the first differential signal) to achieve spectrum shifting, perform down-conversion, and convert the input differential signal pair (i.e., the first differential signal) into four quadrature differential signals (i.e., the first quadrature differential signal).

[0048] When the RF chip is in the transmitting mode, the second quadrature mixer 323 receives the second quadrature differential signal sent by the first baseband circuit and the second baseband circuit, and uses the local oscillator quadrature differential signal generated by the quadrature circuit as a carrier signal to perform up-conversion on the second quadrature differential signal at the baseband frequency to obtain the second differential signal at the RF frequency.

[0049] In another embodiment provided by the present disclosure, the first baseband circuit and the second baseband circuit respectively include a plurality of signal processing devices, and the plurality of signal processing devices at least include: a filter, a third amplifier, and an attenuator; The filter is configured to filter out the noise signal in the signal input to the corresponding baseband circuit; A third amplifier, which is arranged at the end stage of the baseband circuit where it is located, is used to amplify the signal and output it outside the radio frequency chip; An attenuator is used to attenuate the signal input into the baseband circuit according to a preset step signal.

[0050] In the embodiment of the present disclosure, when the radio frequency chip is in the receiving mode, two signal components in the quadrature differential signal can be respectively input into different baseband circuits. The baseband circuits can respectively perform processing such as gain adjustment and signal amplification on the input signal components, and output the processed signal components, so as to realize the conversion of the first quadrature differential signal into the first baseband quadrature signal. The first baseband quadrature signal, as a signal that can be recognized by other components in the radio device, is output outside the radio frequency chip.

[0051] When the radio frequency chip is in the transmitting mode, the baseband circuit receives the second baseband quadrature signal. The second baseband quadrature signal can be a signal generated by other components of the radio device and ready to be transmitted. Two signal components in the second baseband quadrature signal can be respectively sent to different baseband circuits. The baseband circuits can respectively perform amplitude adjustment and signal amplification processing on the input signal components, and output these two signal components, so as to obtain the second quadrature differential signal.

[0052] The baseband circuit may include multiple signal processing devices, and the corresponding signal processing devices can be configured according to needs. To ensure that the signals obtained by the first baseband circuit and the second baseband circuit have the same time delay, the first baseband circuit and the second baseband circuit should have the same structure.

[0053] The first baseband circuit and the second baseband circuit may at least include: a filter, a third amplifier, and an attenuator. Among them, the third amplifier can be arranged at the end stage of the baseband circuit, and is used to amplify the baseband quadrature signal and provide sufficient driving ability for the signal output by the baseband circuit; the attenuator can be arranged at the front stage of the baseband circuit, and is used to attenuate the signal input into the baseband circuit according to a preset step signal and adjust the gain of the signal.

[0054] The filter can be an Optimal and precise array response control algorithm (OPARC) filter, which is used to filter out out-of-band harmonics, intermodulation components, and noise in the signal.

[0055] In another embodiment provided by the present disclosure, the first baseband circuit and the second baseband circuit further respectively include: a feedback circuit, a fourth amplifier, a first equalizer, and a second equalizer; The feedback circuit is used to feedback the signal between the input end and the output end of the baseband circuit where it is located; A fourth amplifier for amplifying the signal in the baseband circuit where the input is located; A first equalizer and a second equalizer for boosting the high-frequency gain of the signal in the baseband circuit where the input is located.

[0056] In an embodiment of the present disclosure, the baseband circuit may further include: a fourth amplifier, a first equalizer, and a second equalizer.

[0057] Among them, the fourth amplifier is used to provide high gain to the signal input to the baseband circuit and amplify the above signal; the first equalizer and the second equalizer are used to boost the high-frequency gain of the signal in the baseband circuit; the feedback circuit can be a direct current offset calibration (DCOC, DC Offset Cancellation) circuit that collects the direct current offset at the output end of the baseband circuit and feeds it back to the input end of the baseband circuit to eliminate or suppress the possible direct current offset caused by process deviation, device mismatch, or environment in the baseband circuit.

[0058] It should be noted that for the baseband circuit provided in the present disclosure, the signal processing device inside it can be configured according to the actual application scenario, and the configuration method of the signal processing device inside the baseband circuit is not fixed. Here, a configuration method of the baseband circuit as shown in Figure 4 is provided as an example. In a possible implementation manner, the first baseband circuit and the second baseband circuit can be implemented as the structure in Figure 4 : Among them, the fourth amplifier 401 receives the first quadrature differential signal or the second baseband quadrature signal as the input end of the baseband circuit. The output end of the fourth amplifier 401 is connected to the input end of the first equalizer 402. The output end of the first equalizer 402 is connected to the input end of the attenuator 403. The output end of the attenuator 403 is connected to the output end of the second equalizer 404. The output end of the second equalizer 404 is connected to the input end of the filter 405. The output end of the filter 405 is connected to the input end of the third amplifier 406. The output end of the third amplifier 406 can output the first baseband quadrature signal or the second quadrature differential signal in different operating modes of the radio frequency chip. One end of the feedback circuit 407 is connected to the output end of the third amplifier 406, and the other end is connected to the input end of the fourth amplifier 401.

[0059] The present disclosure also provides an electronic device including the radio frequency chip provided in any one of the embodiments of the present disclosure.

[0060] Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments of the present disclosure can be implemented by hardware or by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solutions of the embodiments of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several instructions for causing a computer device (such as a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present disclosure.

[0061] Those skilled in the art can understand that the drawings are only schematic diagrams of a preferred embodiment, and the modules or processes in the drawings are not necessarily essential for implementing the present disclosure.

[0062] Those skilled in the art can understand that the modules in the device in the embodiments can be distributed in the device in the embodiments according to the description of the embodiments, or can be correspondingly changed and located in one or more devices different from the present embodiments. The modules of the above embodiments can be combined into one module, or can be further split into multiple sub-modules.

[0063] The serial numbers of the above embodiments of the present disclosure are only for description and do not represent the advantages or disadvantages of the embodiments.

[0064] Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalent technologies, the present disclosure is also intended to include these changes and modifications.

Claims

1. A radio frequency chip, characterized in that, Comprising: A first baseband circuit, a second baseband circuit, and at least one signal processing link; The signal processing link includes: a quadrature frequency conversion module and a transceiver amplification module; A first end of the transceiver amplification module is connected to an external antenna end of the radio frequency chip; a second end and a third end of the transceiver amplification module are respectively connected to the quadrature frequency conversion module; the transceiver amplification module is configured to amplify a signal and receive and transmit signals through the external antenna end; The quadrature frequency conversion module is respectively connected to the first baseband circuit and the second baseband circuit; the quadrature frequency conversion module is configured to adjust the frequency of an input signal; The first baseband circuit and the second baseband circuit are respectively connected to an external circuit of the radio frequency chip, and are respectively configured to process signals input to the baseband circuit.

2. The chip according to claim 1, characterized in that The radio frequency chip switches a working mode according to a host computer signal; wherein, the working mode includes: a reception mode and a transmission mode; The transceiver amplification module is configured to, when the radio frequency chip is in the reception mode, receive and amplify a first signal transmitted by the external antenna end; the first signal is output as a first baseband quadrature signal after being processed by the transceiver amplification module, the quadrature frequency conversion module, the first baseband circuit, and the second baseband circuit; The first baseband circuit and the second baseband circuit are configured to, when the radio frequency chip is in the transmission mode, receive a second baseband quadrature signal transmitted by an external circuit of the radio frequency chip; the second baseband quadrature signal is output as a second signal after being processed by the first baseband circuit, the second baseband circuit, the quadrature frequency conversion module, and the transceiver amplification module.

3. The chip according to claim 2, wherein The transceiver amplification module includes: a signal switching device, a first amplifier, and a second amplifier; A first end of the signal switching device is connected to the external antenna end of the radio frequency chip; A second end of the signal switching device is connected to an input end of the first amplifier; A third end of the signal switching device is connected to an output end of the second amplifier; An output end of the first amplifier is connected to the quadrature frequency conversion module; the first amplifier is configured to, when the first end and the second end of the signal switching device are conducted, adjust the received first signal into a first differential signal and transmit it to the quadrature frequency conversion module; An input end of the second amplifier is connected to the quadrature frequency conversion module; the second amplifier is configured to, when the first end and the third end of the signal switching device are conducted, adjust the received second differential signal into the second signal.

4. The chip according to claim 3, characterized in that, The transceiver amplification module is configured to, when the radio frequency chip is in the reception mode, adjust the received first signal into the first differential signal and transmit it to the quadrature frequency conversion module; The quadrature frequency conversion module is configured to mix the first differential signal with a local oscillator quadrature differential signal and then output a first orthogonal differential signal to the first baseband circuit and the second baseband circuit; The first baseband circuit and the second baseband circuit are configured to adjust the first quadrature differential signal to obtain the first baseband quadrature signal, and output the first baseband quadrature signal to an external circuit of the radio frequency chip.

5. The chip according to claim 3, characterized in that, The first baseband circuit and the second baseband circuit are configured to, when the radio frequency chip is in a transmission mode, respectively adjust the received second baseband quadrature signal to a second quadrature differential signal and output it to the quadrature frequency conversion module. The quadrature frequency conversion module is configured to frequency-convert the second quadrature differential signal and output the second differential signal. The transceiver amplifier module is configured to obtain the second signal according to the second differential signal and output it to an external antenna terminal of the radio frequency chip.

6. The chip according to claim 3, wherein The signal switching device is configured to switch the conduction states of the first amplifier and the second amplifier according to the state of the radio frequency chip. Wherein, when the radio frequency chip is in a receiving state, the first amplifier is turned on and the second amplifier is turned off; the first signal is input to the signal switching device through a first end of the signal switching device and output to the first amplifier through the signal switching device. When the radio frequency chip is in a transmitting state, the second amplifier is turned on and the first amplifier is turned off; the second signal obtained through the second amplifier is input to the signal switching device through a third end of the signal switching device.

7. The chip according to claim 3, wherein, The quadrature frequency conversion module includes: a quadrature signal generation circuit, a first quadrature mixer, and a second quadrature mixer. A first end of the first quadrature mixer is connected to the first amplifier, a second end of the first quadrature mixer is connected to the first baseband circuit, and a third end of the first quadrature mixer is connected to the second baseband circuit. A first end of the second quadrature mixer is connected to the second amplifier, a second end of the second quadrature mixer is connected to the first baseband circuit, and a third end of the second quadrature mixer is connected to the second baseband circuit. The quadrature signal generation circuit is respectively connected to the first quadrature mixer and the second quadrature mixer. The quadrature signal generation circuit is configured to obtain four local oscillator quadrature differential signals according to an input local oscillator signal and respectively output them to the first quadrature mixer and the second quadrature mixer. The first quadrature mixer is configured to, when the radio frequency chip is in a receiving mode, receive the first differential signal output by the transceiver amplifier module, mix it with the local oscillator quadrature differential signal to obtain a first quadrature differential signal. The second quadrature mixer is configured to, when the radio frequency chip is in a transmitting mode, receive the second quadrature differential signal, mix it with the local oscillator quadrature differential signal to obtain a second differential signal.

8. The chip according to claim 1, characterized in that, The first baseband circuit and the second baseband circuit respectively include a plurality of signal processing devices, and at least include: a filter, a third amplifier, and an attenuator. The filter is configured to filter out noise signals in the signal input to the baseband circuit where it is located. The third amplifier is disposed at the end stage of the baseband circuit where it is located and is configured to amplify the signal and output it outside the radio frequency chip. The attenuator is used to attenuate the signal input to the baseband circuit according to a preset step signal.

9. The chip according to claim 7, characterized in that, The first baseband circuit and the second baseband circuit further respectively include: a feedback circuit, a fourth amplifier, a first equalizer, and a second equalizer; The feedback circuit is used to feedback the signal between the input end and the output end of the baseband circuit where it is located; The fourth amplifier is used to amplify the signal input to the baseband circuit; The first equalizer and the second equalizer are used to boost the high-frequency gain of the signal input to the baseband circuit.

10. An electronic device, characterized in that, Comprising: The radio frequency chip according to any one of claims 1-9.

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