TWM637356U - Wireless communication front-end circuit device - Google Patents

Abstract

A wireless communication front-end circuit device, suitable for coupling with a base frequency circuit device and an antenna circuit device respectively, the base frequency circuit device can transmit and receive a digital wireless communication signal and has a signal transmitting end and a signal receiving end, the The wireless communication front-end circuit device includes a power amplifying unit, a low-noise amplifying unit, and a switch unit. The power amplifying unit is electrically connected to the signal transmitting end of the base frequency circuit device, and the low noise amplifying unit is electrically connected to the signal receiving end of the base frequency circuit device. The switch unit is respectively coupled with the power amplifying unit, the low noise amplifying unit, and the antenna circuit device, and includes a plurality of transistors that can be switched between a standard mode and a bypass mode.

Description

Wireless communication front-end circuit device

The present invention relates to a front-end module circuit, in particular to a wireless communication front-end circuit device for digital wireless communication signals.

With the rapid development of science and technology, in modern electronic equipment, wireless communication technology for wireless transmission of data, sound, images, etc. has been used more and more widely, such as mobile phones, tablet computers, digital TV, medical, agricultural, etc. Integrating into daily life, it brings infinite convenience to human beings. It can be seen that the purpose of developing wireless communication is to enable users to communicate with each other at any time and any place without being limited by traditional wired transmission, so that the development of wireless communication can not be ignored.

Referring to FIG. 1 , it is a functional block diagram of a conventional front-end circuit module used in WiFi and Bluetooth systems, and its model is RFFM8202. The front-end circuit module 1 includes a transmitting end 11, a power amplifier element 12 electrically connected to the transmitting end 11, a switch element 13 electrically connected to the power amplifier element 12, and an antenna end electrically connected to the switch element 13 14. A low-noise amplifying element 15 electrically connected to the switching element 13, a bypass circuit 16 connected in parallel to the low-noise amplifying element 15, and a receiving end 17 electrically connected to the low-noise amplifying element 15.

The bypass circuit 16 of the front-end circuit module 1 can enable the low-noise amplifying element 15 to provide a bypass (Bypass) mode when the output power is relatively high, so that the signal is no longer amplified through the low-noise amplifying element 15, And directly bypass the output to the receiving end 17, thereby improving the accuracy of wireless signal transmission and ensuring that the circuit will not be damaged by excessive power.

From the above, it can be known that the bypass mode provided by the bypass circuit 16 can make the front-end circuit module 1 have the function of directly outputting the signal without amplifying it. However, the bypass However, the circuit 16 needs to consume additional electronic components, so the cost is high, the hardware area is large, the power consumption is large, and the hardware complexity is high.

In view of this, the development of a wireless communication front-end module circuit device that can reduce manufacturing costs, simplify hardware complexity and chip size, and can avoid oversaturation of transmitted signals and reduce power consumption will surely enable the industry to create greater business opportunities , this kind of more efficient and more efficient design is quite worth looking forward to.

In view of this, the purpose of the present invention is to provide a wireless communication front-end circuit device. The manufacturing cost of the wireless communication front-end circuit device is lower than that of the traditional one, and the power consumption, hardware complexity and chip area are all smaller than the traditional front-end circuit.

The wireless communication front-end circuit device is suitable for coupling with a first control signal, a second control signal, a third control signal, a base frequency circuit device and an antenna circuit device respectively, and the base frequency circuit device can transmit, It receives a digital wireless communication signal and has a signal transmitting end and a signal receiving end. The wireless communication front-end circuit device includes a power amplifying unit, a low noise amplifying unit, and a switching unit.

The power amplifying unit is electrically connected to the signal transmitting end of the base frequency circuit device, and the low noise amplifying unit is electrically connected to the signal receiving end of the base frequency circuit device. The switch unit is respectively coupled with the power amplifying unit, the low noise amplifying unit, and the antenna circuit device, and includes a plurality of transistors that can be switched between a standard mode and a bypass mode.

When the switch unit is switched to the standard mode, it can receive the digital wireless communication signal output from the power amplifier unit and transmit it to the antenna circuit device, and when the switch unit is switched to the bypass mode, the digital wireless communication The signal is received from the antenna circuit device and passed back to the base frequency circuit device through the plurality of transistors, wherein the switch unit has a receiving A transmitting transistor for the first control signal, a receiving transistor for receiving the second control signal, and a ground transistor for receiving the third control signal.

Another technical means of the present invention is that the above-mentioned transmitting transistor has a transmitting input terminal, a transmitting output terminal, and a transmitting control terminal, the transmitting input terminal is coupled with the power amplifying unit, and the transmitting output terminal Coupled with the antenna circuit device, the transmission control terminal controls whether the transmission input terminal and the transmission output terminal are connected.

Yet another technical means of the present invention is that the above-mentioned receiving terminal transistor has a receiving input terminal, a receiving output terminal, and a receiving control terminal, the receiving input terminal is coupled with the antenna circuit device, and the receiving output terminal Coupled with the low noise amplifying unit, the receiving control terminal controls whether the receiving input terminal and the receiving output terminal are connected.

Yet another technical means of the present invention is that the above-mentioned ground terminal transistor has a ground output terminal, a ground input terminal, and a ground control terminal, the ground output terminal is coupled with the receiving terminal transistor, and the ground input terminal The terminal is grounded, and the ground control terminal controls whether the connection between the ground input terminal and the ground output terminal is conducted.

Another technical means of the present invention is that the above-mentioned switch unit further has a capacitor connected in series between the ground input terminal and ground.

The beneficial effect of the present invention is that when the switch unit is switched to the standard mode, the digital wireless communication signal output from the power amplifier unit can be received and transmitted to the antenna circuit device, and when the switch unit is switched to the bypass In the mode, the digital wireless communication signal is received from the antenna circuit device, and is shunted and returned to the base frequency circuit device through the plurality of transistors. Therefore, the hardware design of the conventional bypass circuit can be omitted, the chip area can be saved and the complexity of the chip design can be simplified, and the transmission signal can be prevented from being over-amplified and oversaturated, which can improve the accuracy of wireless signal transmission and ensure that the baseband circuit The circuit of the device will not be damaged by excessive amplification power, and has the effect of further reducing cost and power consumption.

BT: Bluetooth channel

C: Capacitance

CTX: the first control signal

CRX: Second control signal

CB: The third control signal

CVB_L: Amplify control signal

1: Front-end circuit module

11:Transmitter

12: Power amplifier components

13: Switching element

14: Antenna end

15: Low noise amplifier components

16: Bypass circuit

17: Receiver

2: Wireless communication front-end circuit device

21: Power amplifier unit

22: Low noise amplifier unit

23: switch unit

231:transmitter transistor

2311:Transmit input

2312: transfer output

2313: Transmission control terminal

232: Receiver transistor

2321: Receive input

2322: Receive output

2323: Receive control terminal

233: ground terminal transistor

2331: ground output

2332: Ground input

2333: ground control terminal

24: Detection unit

3: Fundamental frequency circuit device

31: Signal transmitter

32: Signal receiving end

4: Antenna circuit device

91~93: Steps

Fig. 1 is a schematic diagram of a block, illustrating a known front-end circuit module; Fig. 2 is a schematic diagram of a block, illustrating a preferred embodiment of the new wireless communication front-end circuit device; Fig. 3 is a schematic circuit diagram, illustrating the comparative The circuit in the preferred embodiment is a standard mode; Fig. 4 is a flow chart of steps illustrating the bypass control method of the wireless communication front-end circuit device of the present invention; and Fig. 5 is a schematic circuit diagram illustrating the preferred embodiment The circuit is in a bypass mode.

The features and technical contents of the relevant patent applications related to the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. Before proceeding with the detailed description, it should be noted that like elements are denoted by the same reference numerals.

Referring to Fig. 2 and Fig. 3, it is a preferred embodiment of the novel wireless communication front-end circuit device 2, the wireless communication front-end circuit device 2 is suitable for coupling 4 with a base frequency circuit device 3 and an antenna circuit device respectively, the base The frequency circuit device 3 can transmit and receive a digital wireless communication signal and has a signal transmitting terminal 31 and a signal receiving terminal 32. The wireless communication front-end circuit device 2 includes a power amplifying unit 21, a low noise amplifying unit 22, and a switch Unit 23, a detection unit 24, and a bluetooth channel BT.

The power amplifying unit 21 is electrically connected to the signal transmitting end 31 of the base frequency circuit device 3 , and the low noise amplifying unit 22 is electrically connected to the signal receiving end 32 of the base frequency circuit device 3 .

The switch unit 23 is respectively coupled with the power amplifying unit 21, the low-noise amplifying unit 22, and the antenna circuit device 4, and the switch unit 23 is provided with a plurality of switches that can be switched between a standard mode and a bypass mode. Transistor.

In this preferred embodiment, the switch unit 23 is a circuit module of a single-pole three-throw switch as a whole, but it can also be a circuit module of other forms of multi-pole multi-throw switches during actual implementation. limit. Wherein, the switch unit 23 has a transmitting transistor 231 , a receiving transistor 232 , and a grounding transistor 233 .

The transmitting transistor 231 has a transmitting input 2311, a transmitting output 2312, and a transmitting control terminal 2313 for controlling whether the transmitting input 2311 and the transmitting output 2312 are connected. The transmission input end 2311 is coupled with the power amplifying unit 21 to receive the digital wireless communication signal, and its transmission output end 2312 is coupled with the antenna circuit device 4 to output the digital wireless communication signal, and the transmission control end 2313 is It is used to control whether the transmission input terminal 2311 and the transmission output terminal 2312 are connected.

The receiver transistor 232 has a receiver input terminal 2321 , a receiver output terminal 2322 , and a receiver control terminal 2323 for controlling whether the receiver input terminal 2321 and the receiver output terminal 2322 are connected. The receiving input end 2321 of the receiving transistor 232 is coupled to the antenna circuit device 4 to receive the digital wireless communication signal, and the receiving output end 2322 is coupled to the low noise amplifying unit 22 to return the digital wireless communication signal. communication signal.

The ground terminal transistor 233 has a ground output terminal 2331 , a ground input terminal 2332 , and a ground control terminal 2333 for controlling whether the ground output terminal 2331 is connected to the ground input terminal 2332 . The ground output terminal 2331 of the ground terminal transistor 233 is coupled to the receiving output terminal 2322 of the receiving terminal transistor 232 to receive the digital wireless communication signal, and its ground input terminal 2332 is connected in series with a capacitor C to receive a ground signal. Voltage.

In this preferred embodiment, the Bluetooth channel BT is coupled to the ground terminal transistor 233 and connected to the signal receiving terminal 32 for conduction, which can be used by Bluetooth or other communication channels. The detection unit 24 is electrically connected to the power amplifier unit 21, and is mainly used to detect the signal transmitting end The power of the digital wireless communication signal output by 31 is not limited to the existence of the bluetooth channel BT and the detection unit 24 during actual implementation.

The wireless communication front-end circuit device 2 includes a plurality of channels connecting a first control signal CTX, a second control signal CRX, a third control signal CB, and an amplified control signal CVB_L. When the switch unit 23 is switched to the standard mode, the switch unit 23 can receive the digital wireless communication signal output from the power amplification unit 21 and transmit it to the antenna circuit device 4 (i.e. the mode TX in Table 1, the The first control signal CTX is at a high potential H (HIGH), and the second control signal CRX, the third control signal CB, and the amplified control signal CVB_L are at a low potential L (LOW). The above table 1 is a truth table, Explain the input logic of the circuit in Figure 3, Mode is the transmission mode (including TX mode, RX mode, BT mode, Bypass bypass mode), H is high potential, L is low potential).

Referring to Figs. 5 and 6 together, it is a preferred embodiment of the bypass control method of the new wireless communication front-end circuit device 2, and includes the following steps. First, in step 91, the complex number The control signals respectively correspond to and enable the transistors in the switch unit 23 to enable the low noise amplifying unit 22 to operate. In this preferred embodiment, the first control signal CTX, the second control signal CRX, and the third control signal CB are respectively corresponding to control the transmission control terminal 2313 of the transmission terminal transistor 231, the reception terminal transistor 232 The receiving control terminal 2323 and the grounding control terminal 2333 of the grounding terminal transistor 233 are conducting control signals, and the amplifying control signal CVB_L is a bias circuit signal enabling the low noise amplifying unit 22 to operate.

Next, in step 92, when the switch unit 23 is in the bypass mode, at least one control signal in the plurality of control signals enables the low noise amplifying unit 22 to operate. In this preferred embodiment, as long as the amplifying The control signal CVB_L is a high potential H, regardless of the other first control signal CTX, second control signal CRX, third control signal CB is a high potential H or low potential L is a kind of bypass mode Bypass, because of its bypass mode The change of each control signal (high potential H or low potential L) in Bypass can be understood from the truth table in the above table 1, so the step-by-step flow chart of each control signal (high potential H or low potential L) will not be drawn one by one. The transmission modes in the above Table 1 include mode TX, mode RX, bluetooth channel BT mode, and bypass mode Bypass.

Here, it should be noted that the first control signal CTX, the second control signal CRX, and the third control signal CB enable the control terminals of the corresponding transistors, so that the corresponding transistors are turned on or off. (Although the control signal is a low potential L, in this model it only means that the low potential L allows the signal to pass less than the high potential H pass mode). Among them, the mode RX can be regarded as one of the bypass mode Bypass in the present invention, which is characterized in that the digital wireless communication signal received from the antenna circuit device 4 to the low noise amplifier 22 in the bypass mode Bypass is the maximum A large number of persons.

Moreover, the control signal input logic truth table shown in the above Table 1 is only an example, and lists the conduction states of the transistor switches of the switch unit 23 in various bypass modes. The input logic in the truth table will vary with the amount of the control signal, the number of transistors, and the form of different switch units 23, so it should not be limited to this in actual implementation.

Finally, proceed to step 93, the antenna circuit device 4 receives the digital wireless communication signal to the base in a shunt manner through the transmitting transistor 231, the receiving transistor 232, and the grounding transistor 233 that are turned on by the switch unit 23. Frequency circuit device 3.

Compared with the conventional one, the wireless communication front-end circuit device 2 and the bypass control method of the present invention do not need the hardware design of the conventional bypass circuit, can save chip area and simplify the complexity of chip design. Although the physical bypass circuit is omitted, the first control signal CTX, the second control signal CRX, and the third control signal CB respectively correspond to enabling the control terminals of each transistor in the switch unit 23, so it can The digital wireless communication signal received by the antenna circuit device 4 is transmitted to the baseband circuit device 3 in the form of shunting, so as to prevent a single signal from being over-amplified when passing through the low-noise amplifying unit 22 to cause oversaturation of the transmission signal.

Therefore, the wireless communication front-end circuit device 2 and the bypass control method thereof of the present invention can ensure that the circuit of the base frequency circuit device 3 will not be oversaturated due to excessively high amplification power, improve the accuracy of the transmitted signal and make the chip not easy to be damaged, and The hardware design of the conventional bypass circuit can be omitted, the chip area can be saved and the complexity of the chip design can be simplified, and the cost and power consumption can be further reduced.

According to the actual test results obtained by the creators of this case, when the signal power input by the antenna circuit device 4 is -20dBm, the signal power output from the switch unit 23 to the base frequency circuit device 3 is -21.745dBm . Therefore, through the wireless communication front-end circuit device 2 and its bypass control method of the present invention, it can be seen that the difference between the input signal and the output signal is not large, which can prove that the signal is not over-amplified, and the received digital wireless communication signal is not oversaturated. produce.

To sum up, the wireless communication front-end circuit device 2 of the present invention is coupled with the power amplifier unit 21, the low noise amplifier unit 22, and the switch unit 23. When the switch unit 23 is switched to the standard mode, The digital wireless communication signal output from the power amplifying unit 21 can be received and sent to the antenna circuit device 4, and when the switch unit 23 switches to the bypass mode, the first control signal CTX, the second The second control signal CRX and the third control signal CB respectively correspond to enabling the control terminals of the plurality of transistors in the switch unit 23, so that the digital wireless communication signal received by the antenna circuit device 4 can be transmitted to the base in the form of shunting. The frequency circuit device 3 ensures that the circuit of the base frequency circuit device 3 will not be oversaturated due to excessively high amplification power, improves the accuracy of the transmitted signal and makes the chip not easily damaged, and does save the hard work of the conventional bypass circuit compared with the conventional one. The overall design further saves the chip area and simplifies the chip design, and has the effect of reducing costs, so the purpose of the present invention can indeed be achieved.

But what is described above is only a preferred embodiment of the present invention, and should not limit the scope of implementation of the present invention with this, that is, all simple equivalent changes and modifications made according to the patent scope of the present application and the content of the new description , all still belong to the scope covered by the present patent.

BT: Bluetooth channel

CTX: the first control signal

CRX: Second control signal

CB: The third control signal

CVB_L: Amplify control signal

2: Wireless communication front-end circuit device

21: Power amplifier unit

22: Low noise amplifier unit

23: switch unit

231:transmitter transistor

232: Receiver transistor

233: ground terminal transistor

24: Detection unit

31: Signal transmitter

32: Signal receiving end

4: Antenna circuit device

Claims (5)

A wireless communication front-end circuit device, suitable for coupling with a first control signal, a second control signal, a third control signal, a base frequency circuit device and an antenna circuit device respectively, the base frequency circuit device can transmit and receive A digital wireless communication signal has a signal transmitting end and a signal receiving end, and the wireless communication front-end circuit device includes: a power amplification unit electrically connected to the signal transmission end of the baseband circuit device; a low noise amplifying unit electrically connected to the signal receiving end of the baseband circuit device; and A switch unit, respectively coupled with the power amplifying unit, the low noise amplifying unit, and the antenna circuit device, and including a plurality of transistors that can be switched between a standard mode and a bypass mode, when the switch unit When switching to the standard mode, the digital wireless communication signal output from the power amplifier unit can be received and sent to the antenna circuit device, and when the switch unit is switched to the bypass mode, the digital wireless communication signal is transmitted from the The antenna circuit device receives and sends back to the base frequency circuit device through the plurality of transistors, wherein the switch unit has a transmitting transistor for receiving the first control signal, and a receiving terminal transistor for receiving the second control signal. crystal, and a ground terminal transistor receiving the third control signal. The wireless communication front-end circuit device as described in claim 1, wherein, the transistor at the transmitting end has a transmitting input terminal, a transmitting output terminal, and a transmitting control terminal, the transmitting input terminal is coupled with the power amplifying unit, and the transmitting terminal The output end is coupled to the antenna circuit device, and the transmission control end controls whether the transmission input end and the transmission output end are connected. The wireless communication front-end circuit device as described in claim 1, wherein, the receiving terminal transistor has a receiving input terminal, a receiving output terminal, and a receiving control terminal, the receiving input terminal is coupled with the antenna circuit device, and the receiving terminal The output end is coupled to the low noise amplifying unit, and the receiving control end controls whether the receiving input end and the receiving output end are connected. The wireless communication front-end circuit device as described in claim 1, wherein the ground terminal transistor has a ground output terminal, a ground input terminal, and a ground control terminal, the ground output terminal is coupled to the receiving terminal transistor, the The ground input terminal is grounded, and the ground control terminal controls whether the connection between the ground input terminal and the ground output terminal is conducted. The wireless communication front-end circuit device according to claim 4, wherein the switch unit further has a capacitor connected in series between the ground input terminal and ground.

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