CN214045575U - Multi-channel device - Google Patents
Multi-channel device Download PDFInfo
- Publication number
- CN214045575U CN214045575U CN202023135545.3U CN202023135545U CN214045575U CN 214045575 U CN214045575 U CN 214045575U CN 202023135545 U CN202023135545 U CN 202023135545U CN 214045575 U CN214045575 U CN 214045575U
- Authority
- CN
- China
- Prior art keywords
- current
- amplifier
- final
- push
- stage amplifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The application relates to a multi-channel device, which comprises a plurality of power amplifying units, a first current detection unit, a second current detection unit and a control unit; each power amplification unit comprises a push-stage amplifier and a final-stage amplifier; the first current detection unit is used for detecting the drain current of each push-stage amplifier; a second current detection unit for detecting a drain current of each final amplifier; the control unit is used for determining the grid voltage of each push-stage amplifier according to the drain current of each push-stage amplifier and the preset quiescent current range of the push-stage amplifier; and determining the gate voltage of each final amplifier according to the drain current of each final amplifier and the preset quiescent current range of the final amplifier. The multi-channel equipment can improve the production efficiency of the multi-channel equipment and improve the operation reliability of the control unit; the detection precision of the drain current is improved, and the performance of the multi-channel equipment is improved.
Description
Technical Field
The present application relates to the field of wireless communication technologies, and in particular, to a multi-channel device.
Background
With the development of wireless mobile communication technology, devices in a communication System increasingly adopt a multichannel integrated design scheme, and multichannel devices such as a multichannel digital Distributed Access System (DAS for short), an Open Radio Access Network (Open-RAN for short), a multichannel digital Radio Remote Unit (RRU for short), and a Multiple Input Multiple Output (MIMO) multichannel integrated device become the forms of mainstream products at present. The multi-channel device usually comprises a plurality of power amplification units; in the power amplification unit, the quiescent current of the power amplifier is an important factor affecting the operation efficiency, linearity and other indexes of the power amplification unit. Therefore, in the production debugging stage of the multi-channel device, the gate voltage of the power amplifier needs to be adjusted, so that the quiescent current of each power amplifier is an appropriate value.
In the conventional technology, a gate voltage determination method of a power amplifier comprises the following steps: adjusting the grid voltage of the power amplifier through grid voltage debugging software, reading the drain current of the power amplifier through an external direct current power supply, and storing the current grid voltage value when the drain current detected by the external direct current power supply is within a preset quiescent current range; the grid voltage of each power amplifier in the multi-channel equipment is adjusted in sequence by adopting the method.
However, with the high integration of the multi-channel device, the power amplification unit is no longer a separate module but integrated with the digital board, and is connected with the digital board through the same power module and the commercial power, which results in complicated operation when the drain current of the power amplifier is directly read through the external dc power supply, and affects the production efficiency of the multi-channel device.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a multi-channel device in order to solve the above technical problems.
A multi-channel device includes a plurality of power amplifying units, a first current detecting unit, a second current detecting unit, and a control unit; each power amplification unit comprises a push-stage amplifier and a final-stage amplifier;
the first current detection unit is used for detecting the drain current of each push-stage amplifier;
a second current detection unit for detecting a drain current of each final amplifier;
the control unit is used for determining the grid voltage of each push-stage amplifier according to the drain current of each push-stage amplifier and the preset quiescent current range of the push-stage amplifier; and determining the gate voltage of each final amplifier according to the drain current of each final amplifier and the preset quiescent current range of the final amplifier.
In one embodiment, the range of the measuring range of the first current detection unit is different from that of the second current detection unit; the range of the first current detection unit is determined by the quiescent current range of the push-stage amplifier, and the range of the second current detection unit is determined by the quiescent current range of the final-stage amplifier.
In one embodiment, the multi-channel device further comprises a power supply module for converting an external voltage into a voltage required by the push-stage amplifier and the final-stage amplifier; the output end of the power supply module is respectively connected with the first current detection unit and the second current detection unit.
In one embodiment, the first current detecting unit includes a first detecting resistor and a first operational amplifier;
the first detection resistor is connected between the power supply module and the drain electrode of each push-stage amplifier in series, the first input end of the first operational amplifier is connected with one end of the first detection resistor, and the second input end of the first operational amplifier is connected with the other end of the first detection resistor;
the first operational amplifier is used for transmitting the first current sampling signal to the control unit.
In one embodiment, the second current detection unit includes a second detection resistor and a second operational amplifier;
the second detection resistor is connected between the power supply module and the drain electrode of each final amplifier in series, the first input end of the second operational amplifier is connected with one end of the second detection resistor, and the second input end of the second operational amplifier is connected with the other end of the second detection resistor;
the second operational amplifier is used for transmitting the second current sampling signal to the control unit.
In one embodiment, the power module includes a first output port and a second output port; the first output port is connected with one end of the first detection resistor, and the second output port is connected with one end of the second detection resistor.
In one embodiment, the voltage values output by the first output port and the second output port are different.
In one embodiment, the multi-channel device further includes an analog-to-digital conversion unit, and the analog-to-digital conversion unit is respectively connected to the control unit, the first current detection unit, and the second current detection unit;
the analog-to-digital conversion unit is used for converting a first current sampling signal output by the first current detection unit into a drain current of the push-stage amplifier and/or converting a second current sampling signal output by the second current detection unit into a drain current of the final-stage amplifier;
the analog-to-digital conversion unit is used for transmitting the drain current to the control unit.
In one embodiment, the control unit is configured to determine a target amplifier according to a control instruction; the target amplifier is one of a push-stage amplifier or a final-stage amplifier;
the control unit is used for controlling the target amplifier to be started and controlling the rest amplifiers to be closed;
the control unit is used for adjusting the grid voltage of the target amplifier until the drain current of the target amplifier is within the static range of the target amplifier, and storing the current grid voltage of the target amplifier.
In one embodiment, the control unit is configured to determine the target amplifier according to a preset gate voltage debugging sequence after acquiring the control instruction.
In one embodiment, the multi-channel device further includes a plurality of rf front-end units, and each rf front-end unit is connected to an input terminal of a corresponding power amplification unit.
In one embodiment, the first current detection circuit is further configured to detect an operating current when the push-stage amplifier outputs the rf signal; the second current detection circuit is also used for detecting the working current when the final amplifier outputs the radio frequency signal;
the control unit is also used for realizing current alarm according to the working current.
In one embodiment, the control unit is connected to a port of the gate voltage debugging platform, and is configured to display the drain current through the gate voltage debugging platform and obtain a gate voltage output by the gate voltage debugging platform.
The multi-channel device comprises a plurality of power amplification units, a first current detection unit, a second current detection unit and a control unit; each power amplification unit comprises a push-stage amplifier and a final-stage amplifier; the first current detection unit is used for detecting the drain current of each push-stage amplifier; a second current detection unit for detecting a drain current of each final amplifier; the control unit is used for determining the grid voltage of each push-stage amplifier according to the drain current of each push-stage amplifier and the preset quiescent current range of the push-stage amplifier; and determining the gate voltage of each final amplifier according to the drain current of each final amplifier and the preset quiescent current range of the final amplifier. Because the first current detection unit and the second current detection unit are arranged in the multi-channel device, the drain current of each push-stage amplifier can be detected through the first current detection unit, and the drain current of each final-stage amplifier can be detected through the second current detection unit, and the drain current does not need to be read through an external direct-current power supply, so that an external power supply does not need to be used in gate voltage debugging, the debugging operation of gate voltage is simplified, and the production efficiency of the multi-channel device is improved; in addition, each current detection unit is connected with a plurality of amplifiers, and each amplifier is not required to be provided with a current detection unit, so that the circuit structure is greatly simplified, the cost of multi-channel equipment is reduced, the number of control signals of the control unit is reduced, and the operation reliability of the control unit is improved; furthermore, because the quiescent current ranges of the push-stage amplifier and the final-stage amplifier are different, different current detection units are adopted to respectively detect the drain current of the push-stage amplifier and the drain current of the final-stage amplifier, so that the detection accuracy of the drain current can be improved, a more appropriate grid voltage can be determined, and the performance of the multi-channel device can be improved.
Drawings
FIG. 1 is a block diagram of a multi-channel device in one embodiment;
FIG. 2 is a block diagram showing the structure of a multi-channel device in another embodiment;
FIG. 3 is a block diagram showing the structure of a multi-channel device in another embodiment;
FIG. 4 is a block diagram showing the structure of a multi-channel device in another embodiment;
FIG. 5 is a block diagram showing the structure of a multi-channel device in another embodiment;
fig. 6 is a block diagram showing the structure of a multi-channel device in another embodiment.
Description of reference numerals:
100. a power amplifying unit; 200. A first current detection unit; 300. A second current detection unit;
400. a control unit; 101. a push-stage amplifier; 102. a final amplifier;
1011. a drain of the push stage amplifier; 1012. a gate of the push stage amplifier;
1021. a drain of the final amplifier; 1022. a gate of the final amplifier;
500. a power supply module; 501. a first output port; 502. a second output port;
201. a first detection resistor; 202. A first operational amplifier; 301. A second detection resistor;
302. a second operational amplifier; 2021. A first input terminal of a first operational amplifier;
2022. a second input terminal of the first operational amplifier;
3021. a first input terminal of a second operational amplifier;
3022. a second input terminal of a second operational amplifier;
600. an analog-to-digital conversion unit; 700. A radio frequency front end unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The multi-channel device provided by the application can comprise a plurality of power amplification units, and the power amplification units comprise power amplifiers needing grid voltage adjustment. The multi-channel device may be, but is not limited to, a device in a multi-channel digital fiber distribution system, an OPEN-RAN device, a multi-channel RRU device, a MIMO device, and the like, and the multi-channel device may be, but is not limited to, a device in the following system, including: global System for Mobile communications (GSM) System, Code Division Multiple Access (CDMA) System, Wideband Code Division Multiple Access (WCDMA) System, LTE System, and 5G System.
In one embodiment, as shown in fig. 1, there is provided a multi-channel device including a plurality of power amplifying units 100, a first current detecting unit 200, a second current detecting unit 300, and a control unit 400; each power amplification unit 100 includes a push stage amplifier 101 and a final stage amplifier 102. The first current detection unit 200 is configured to detect the drain current of each driver stage amplifier 101; the second current detection unit 300 is configured to detect a drain current of each final amplifier 102; the control unit is configured to determine a gate voltage of each push-stage amplifier 101 according to a drain current of each push-stage amplifier 101 and a preset quiescent current range of the push-stage amplifier 101; and determines the gate voltage of each final stage amplifier 102 based on the drain current of each final stage amplifier 102 and a preset quiescent current range of the final stage amplifier 102.
The power amplification unit 100 may operate in multiple frequency bands, including an S band, an L band, a C band, an X band, and the like. The power amplifying unit 100 may be a wideband power amplifying unit, or may be a narrowband power amplifying unit, which is not limited herein. The power amplification unit 100 includes a push-stage amplifier 101 and a final-stage amplifier 102, and may further include other small-signal amplifiers and the like. The boost stage amplifier 101 may include a one-stage boost stage amplifier, may also include a cascaded two-stage boost stage amplifier, and may also be a balanced amplifier or a Doherty amplifier composed of two amplifiers, which is not limited herein. The final amplifier 102 may be a single amplifier to perform final power amplification, or may be a balanced amplifier or a Doherty amplifier composed of two or more amplifiers, which is not limited herein. The push-stage amplifier 101 and the final-stage amplifier 102 may be field effect transistor amplifiers, such as LDMOS amplifiers, gallium nitride amplifiers, etc., and the type of the amplifiers is not limited herein. The push-stage amplifier 101 and the final-stage amplifier 102 may be the same or different in type, for example, the push-stage amplifier 101 is an LDMOS amplifier, and the final-stage amplifier 102 is a gan amplifier. In addition, in the plurality of power amplification units 100, the models of the push-stage amplifiers 101 may be the same or different; the final stage amplifiers 102 may be of the same type or different types. Under the condition that the models of the push-stage amplifiers 101 are the same, the corresponding working frequency ranges can be the same or different; in the case where the types of the final amplifiers 102 are the same, the corresponding operating frequency bands may be the same or different. For example, a multi-channel device includes 4 power amplification units 100, each power amplification unit 100 includes 1 final stage amplifier 102, the models of the 4 final stage amplifiers 102 are the same, in one power amplification unit 100, the operating frequency band of the final stage amplifier 102 is the D-band of TD-LTE, and in another power amplification unit 100, the operating frequency band of the final stage amplifier 102 is the E-band of TD-LTE.
The first current detection unit 200 is connected to the drain 1011 of each push-stage amplifier for detecting the drain current of each push-stage amplifier 101, and the second current detection unit 300 is connected to the drain 1021 of each final amplifier for detecting the drain current of each final amplifier 102. The drain current may be a quiescent current when no radio frequency signal is input to each amplifier, or an operating current when each amplifier amplifies the power of a radio frequency signal. The first current detecting unit 200 and the second current detecting unit 300 may be formed by current detecting chips, or may be circuits built by discrete components such as a transistor, and are not limited herein. The circuit configurations of the first current detection unit 200 and the second current detection unit 300 may be the same or different.
Alternatively, in the case where the quiescent current ranges of the push-stage amplifier 101 and the final-stage amplifier 102 are largely different, the range of the first current detection unit 200 and the range of the second current detection unit 300 may be different; wherein, the range of the first current detection unit 200 is determined by the quiescent current range of the push-stage amplifier 101, and the range of the second current detection unit 300 is determined by the quiescent current range of the final-stage amplifier 102. For example, the quiescent current of the push-stage amplifier 101 may be 50mA, the quiescent current of the final-stage amplifier 102 may be 1A, and in order to detect the drain current more accurately, the drain currents of the push-stage amplifier 101 and the final-stage amplifier 102 may be detected by using current detection units having different ranges of measurement.
The control unit 400 is configured to determine a gate voltage of each driver stage amplifier 101 according to a drain current of each driver stage amplifier 101 and a preset quiescent current range of the driver stage amplifier 101; and determines the gate voltage of each final stage amplifier 102 based on the drain current of each final stage amplifier 102 and a preset quiescent current range of the final stage amplifier 102. The input terminal 401 of the control unit may be connected to the gate 1012 of each push-stage amplifier and the gate 1022 of each final-stage amplifier, and the output terminal 402 of the control unit is connected to the first current detection unit 200 and the second current detection unit 300, respectively.
When the quiescent current of the amplifier is the condition that no radio frequency signal is input into the amplifier, the gate voltage is applied to the gate of the amplifier, and then the drain current of the amplifier is increased. For the same amplifier, different gate voltages correspond to different quiescent currents. The quiescent current range of an amplifier affects the linearity, efficiency, etc. of the amplifier. In general, during the debugging process of the power amplification unit 100, the quiescent current range of each amplifier can be set according to the overall performance index of the power amplification unit 100. In different power amplification units 100, the quiescent current ranges of the respective driver stage amplifiers may be the same or different; the quiescent current range of each final amplifier may be the same or different. In the same power amplification unit 100, if the final amplifier 102 is composed of two identical amplifiers, the quiescent currents of the two identical amplifiers may be different. For example, in a Doherty amplifier in which the final stage is formed by two amplifiers, different quiescent current ranges can be set for the two amplifiers so that one amplifier operates at a class AB quiescent operating point and the other amplifier operates at a class C quiescent operating point.
The control unit 400 may output a gate voltage to each of the push stage amplifiers and receive the drain current detected by the first current detecting unit 200, and then compare the value of the detected drain current with the quiescent current range of the push stage amplifier to determine the gate voltage of the push stage amplifier 101.
The control unit 400 may output a gate voltage to each of the final amplifiers and receive the drain current detected by the second current detection unit 300, and then compare the value of the detected drain current with the quiescent current range of the final amplifier to determine the gate voltage of the final amplifier 102.
The control unit 400 may be a digital signal processing DSP module, and the control unit 400 may be implemented by a single chip or an FPGA, which is not limited herein.
The control unit 400 may receive a manual instruction input by a worker and then adjust the gate voltage, for example, the worker sets the gate voltage of the amplifier through the instruction input or the manual debugging software, and then loads the gate voltage to the corresponding amplifier through the control unit 400. In addition, the control unit 400 may sequentially adjust the gate voltage of each amplifier under the control of the automatic test platform, which is not limited herein.
In the multi-channel device, because the first current detection unit 200 and the second current detection unit 300 are arranged in the multi-channel device, the drain current of each push-stage amplifier 101 can be detected by the first current detection unit 200, and the drain current of each final-stage amplifier 102 can be detected by the second current detection unit 300, and the drain current does not need to be read by an external direct-current power supply, so that the external power supply is not needed in gate voltage debugging, the debugging operation of the gate voltage is simplified, and the production efficiency of the multi-channel device is improved; in addition, each current detection unit is connected with a plurality of amplifiers, and each amplifier is not required to be provided with a current detection unit, so that the circuit structure is greatly simplified, the cost of multi-channel equipment is reduced, the number of control signals of the control unit 400 is reduced, and the operation reliability of the control unit 400 is improved; further, since the quiescent current ranges of the push-stage amplifier 101 and the final-stage amplifier 102 are different, different current detection units are used to detect the drain current of the push-stage amplifier 101 and the drain current of the final-stage amplifier 102, respectively, so that the detection accuracy of the drain current can be improved, a more appropriate gate voltage can be determined, and the performance of the multi-channel device can be improved.
In one embodiment, as shown in fig. 2, the multi-channel device further includes a power supply module 500, the power supply module 500 is used for converting an external voltage into a voltage required by the push-stage amplifier 101 and the final-stage amplifier 102; the output end of the power module is respectively connected with the first current detection unit 200 and the second current detection unit 300.
When the power module 500 converts an external voltage, the external voltage may be a voltage of a dc power supply, or may be a voltage of an ac power supply, for example, the external voltage is a voltage of 220V commercial power.
The push-stage amplifier 101 and the final-stage amplifier 102 may be different types of amplifiers, and the drain voltages of the different types of amplifiers may be the same or different. The drain voltage may be 28V, 30V, or 50V. Optionally, the power supply module 500 includes a first output port 501 and a second output port 502; optionally, the voltage values output by the first output port 501 and the second output port 502 are different. The power supply module 500 may convert an external voltage into a different drain voltage. Specifically, when the power module 500 converts the external voltage, the processing such as surge prevention and reverse connection prevention can be realized.
In one implementation, as shown in fig. 3, the first current detecting unit 200 may include a first detecting resistor 201 and a first operational amplifier 202; the first detection resistor 201 is connected in series between the power module 500 and the drain 1011 of each driver stage amplifier, the first input end 2021 of the first operational amplifier is connected to one end of the first detection resistor, and the second input end 2022 of the first operational amplifier is connected to the other end of the first detection resistor; the first operational amplifier 202 is used for transmitting the first current sampling signal to the control unit 400. When the drain current of the push-stage amplifier passes through the first detection resistor 201, a slight voltage difference appears between two ends of the first detection resistor 201, and the voltage difference changes along with the change of the drain current; after the voltage difference is amplified by the first operator, the voltage difference and the drain current of the push-stage amplifier can be linearly changed within a certain range, so that the value of the drain current of the push-stage amplifier 101 can be obtained according to the first current sampling signal output by the first current detection circuit 200.
The second current detection unit 300 includes a second detection resistor 301 and a second operational amplifier 302; the second detection resistor 301 is connected in series between the power module 500 and the drain 1021 of each final amplifier, a first input terminal 3021 of the second operational amplifier is connected to one end of the second detection resistor, and a second input terminal 3022 of the second operational amplifier is connected to the other end of the second detection resistor; the second operational amplifier 302 is used for transmitting the second current sampling signal to the control unit 400.
When the drain current of the final amplifier passes through the second detection resistor 301, a slight voltage difference appears between the two ends of the second detection resistor 301, and the voltage difference changes with the change of the drain current; the voltage difference is amplified by the second operator 302 and then linearly changes with the drain current of the final amplifier within a certain range, so that the value of the drain current of the final amplifier 102 can be obtained according to the second current sampling signal output by the second current detection circuit 300.
The first detecting resistor 201 and the second detecting resistor 301 may be high-precision resistors with small resistance values, and the resistance values and the power-receiving values of the first detecting resistor 201 and the second detecting resistor 301 may be the same or different. The amplification factors of the first operational amplifier 201 and the second operational amplifier 301 may be the same or different. A first output port 501 of the power module may be connected to one end of the first detection resistor 201, and a second output port 502 of the power module may be connected to one end of the second detection resistor 301.
In the multi-channel device, the power supply module 500 may connect the drains of the push-stage amplifier 101 and the final-stage amplifier 102 through different output ports, and respectively connect the first current detection unit and the second current detection unit with the corresponding output ports, so that when the drain voltages of the push-stage amplifier and the final-stage amplifier are different, the drain currents of the push-stage amplifier and the final-stage amplifier may be respectively obtained, the accuracy of detecting the drain currents is improved, and thus, a more accurate gate voltage is obtained, and the performance of the amplifier is improved.
In one embodiment, the control unit 400 is configured to determine a target amplifier according to a control instruction; wherein the target amplifier is one of a push-stage amplifier 101 or a final-stage amplifier 102; then, the control unit is used for controlling the target amplifier to be started and controlling the rest amplifiers to be closed; finally, the control unit adjusts the gate voltage of the target amplifier until the drain current of the target amplifier is within the quiescent range of the target amplifier, and stores the current gate voltage of the target amplifier.
In order to make the detection of the quiescent current more accurate, the control unit 400 may adjust the gate voltage of one amplifier at a time, and thus the control unit 400 may determine a target amplifier according to the control instruction. The control command may be a command generated by a user manually selecting a target amplifier, or may be an automatic modulation control command. Optionally, the automatic debug control instruction includes a gate voltage debug sequence of each amplifier, where the gate voltage debug sequence may be determined according to a channel serial number of the power amplification unit 100, or may be determined by a user. For example, the multi-channel includes 4 power amplification units 100, and the gate voltage debugging sequence may be a push-stage amplifier of a first power amplification unit, a final stage amplifier of the first power amplification unit, a push-stage amplifier of a second power amplification unit, and a final stage amplifier of a … … fourth power amplification unit; in addition, the grid voltage debugging sequence can also finish the grid voltage debugging of all the push-stage amplifiers firstly, and then finish the grid voltage debugging of all the final-stage amplifiers in sequence.
After determining the target amplifier, the control unit 400 may control the target amplifier to be turned on and control the remaining amplifiers to be turned off. For example, the gate of the amplifier may be provided with a gate voltage switch, and the control unit 400 may switch the gate voltage switch of the target amplifier to one end connected to the control unit 400 through a control instruction, so that the target amplifier is turned on; the control unit 400 may also switch the gate voltage switches of the remaining amplifiers to the other end connected to the fixed voltage by a control instruction, so that the target amplifier is turned off. The fixed voltage is a corresponding grid voltage when the target amplifier is closed; for an LDMOS amplifier, the fixed voltage may be 0V, and for a gallium nitride amplifier, the fixed voltage may be-5V.
When the control unit 400 determines the gate voltage of the target amplifier, it may load an initial gate voltage to the target amplifier and read the value of the drain current of the target amplifier; in the process of adjusting the gate voltage, the control unit 400 may adjust the initial gate voltage according to a preset step until the detected value of the drain current is within a preset range, stop the adjustment, and write the current gate voltage into the memory. The initial grid voltage can be 0V or other values; for example, the quiescent current range of the target amplifier is 50mA to 60mA, and the corresponding gate voltage is predicted to be about 2V, then the control unit 400 may set the initial gate voltage of the target amplifier to 1V, so that the quiescent current is a smaller value when the gate of the target amplifier is applied with 1V, and the adjustment is performed on the basis of the initial voltage, so as to improve the gate voltage adjustment efficiency.
After the control unit 400 stores the current gate voltage, the target amplifier may be controlled to be turned off. If the drain current of the target amplifier cannot reach the quiescent current range after the control unit 400 adjusts the gate voltage, the control unit 400 may consider that the target amplifier has a fault and report that the gate voltage debugging fails.
According to the multi-channel equipment, the control unit adjusts the grid voltage of each amplifier in sequence by determining the target amplifier, so that automatic production debugging can be realized, and the production efficiency of the multi-channel equipment is improved.
In one embodiment, as shown in fig. 4, the multi-channel device further includes an analog-to-digital conversion unit 600, and the analog-to-digital conversion unit 600 is respectively connected to the control unit 400, the first current detection unit 200, and the second current detection unit 300;
since the signals output by the first current detection unit 200 and the second current detection unit 300 are analog signals, the first voltage sampling signal and the second voltage sampling signal can be converted into drain currents through analog-to-digital conversion processing. The analog-to-digital conversion unit 600 is configured to convert the first current sampling signal output by the first current detection unit 200 into the drain current of the push-stage amplifier 101, and/or convert the second current sampling signal output by the second current detection unit 300 into the drain current of the final-stage amplifier 102; then, the analog-to-digital conversion unit transmits the converted drain current to the control unit 400.
The analog-to-digital conversion unit 600 may be integrated in the control unit 400, or may be an independent module, which is not limited herein. The analog-to-digital conversion unit 600 may receive the first current sampling signal and the second current sampling signal at the same time, and then perform analog-to-digital conversion on the sampling signals; the first current sample signal or the second current sample signal may be received at different times.
In the multi-channel device, the analog-to-digital conversion unit 600 performs analog-to-digital conversion on the current sampling signal, so that the control unit 400 can adjust the gate voltage according to the magnitude of the drain current.
In one embodiment, as shown in fig. 5, the multi-channel device further includes a plurality of rf front-end units 700, and each rf front-end unit 700 is connected to an input terminal of a corresponding power amplification unit 100. The radio frequency front end unit can process the baseband signal to obtain a radio frequency signal.
In one embodiment, the first current detection circuit 200 is further configured to detect an operating current when the push-stage amplifier 101 outputs the rf signal; the second current detection circuit 300 is further configured to detect an operating current when the final amplifier 102 outputs the rf signal; the control unit 400 is further configured to implement a current alarm according to the above-mentioned operating current. Specifically, the working current of the above-mentioned push stage amplifier 101 may include the working current of the push stage amplifier in the plurality of power amplifying units 100, and the control unit 400 may compare the working current of the push stage amplifier with a preset current threshold, and determine a push stage overcurrent alarm if the working current of the push stage amplifier is greater than the preset current threshold. The operation current of the final amplifier 102 may include an operation current of a final amplifier among the plurality of power amplifying units 100, and the control unit 400 may compare the operation current of the final amplifier with a preset current threshold, and determine a final overcurrent alarm if the operation current of the final amplifier is greater than the preset current threshold. In addition, the control unit 400 may sum the operating current of the push-stage amplifier 101 and the operating current of the final stage amplifier 102, and determine whether to alarm according to the sum of the operating currents. Alternatively, the control unit 400 may also determine whether to alarm in combination with the magnitude of the operating current and the results of power detection, standing wave detection, and the like.
According to the multi-channel equipment, the working currents of the push-stage amplifier and the final-stage amplifier are detected through the first current detection circuit and the second current detection circuit respectively, so that whether an alarm is generated or not can be determined according to the working currents of the push-stage amplifier and the final-stage amplifier respectively, the phenomenon that the alarm is missed when the working current of the whole multi-channel equipment is small due to the fact that the current of the push-stage amplifier is too large is avoided, and the accuracy and timeliness of the alarm are improved.
In one embodiment, as shown in fig. 6, the control unit 400 is connected to a port of the gate voltage debugging platform, and is configured to display the drain current through the gate voltage debugging platform and obtain the gate voltage output by the gate voltage debugging platform.
The multi-channel equipment is connected with the grid voltage debugging platform, so that the current values detected by the first current detection unit and the second current detection unit can be displayed through the grid voltage debugging platform, and the grid voltage can be debugged more intuitively and accurately.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (13)
1. A multi-channel device, comprising a plurality of power amplifying units, a first current detecting unit, a second current detecting unit, and a control unit; each power amplification unit comprises a push-stage amplifier and a final-stage amplifier;
the first current detection unit is used for detecting the drain current of each push-stage amplifier;
the second current detection unit is configured to detect a drain current of each of the final amplifiers;
the control unit is used for determining the grid voltage of each push-stage amplifier according to the drain current of each push-stage amplifier and a preset quiescent current range of the push-stage amplifier; and determining the gate voltage of each final amplifier according to the drain current of each final amplifier and the preset quiescent current range of the final amplifier.
2. The multi-channel device of claim 1, wherein the first current sensing unit and the second current sensing unit have different ranges of span; the range of the first current detection unit is determined by the quiescent current range of the push-stage amplifier, and the range of the second current detection unit is determined by the quiescent current range of the final-stage amplifier.
3. The multi-channel device of claim 1, further comprising a power supply block for converting an external voltage to a voltage required by the push-stage amplifier and the final-stage amplifier; and the output end of the power supply module is respectively connected with the first current detection unit and the second current detection unit.
4. The multi-channel device of claim 3, wherein the first current detection unit comprises a first detection resistor and a first operational amplifier;
the first detection resistor is connected between the power supply module and the drain electrode of each push-stage amplifier in series, the first input end of the first operational amplifier is connected with one end of the first detection resistor, and the second input end of the first operational amplifier is connected with the other end of the first detection resistor;
the first operational amplifier is used for transmitting a first current sampling signal to the control unit.
5. The multi-channel device of claim 4, wherein the second current detection unit comprises a second detection resistor and a second operational amplifier;
the second detection resistor is connected in series between the power supply module and the drain of each final amplifier, a first input end of the second operational amplifier is connected with one end of the second detection resistor, and a second input end of the second operational amplifier is connected with the other end of the second detection resistor;
the second operational amplifier is used for transmitting a second current sampling signal to the control unit.
6. The multi-channel device of claim 5, wherein the power module includes a first output port and a second output port; the first output port is connected with one end of the first detection resistor, and the second output port is connected with one end of the second detection resistor.
7. The multi-channel device of claim 6, wherein the first output port and the second output port output different voltage values.
8. The multi-channel device of claim 1, further comprising an analog-to-digital conversion unit connected to the control unit, the first current detection unit, and the second current detection unit, respectively;
the analog-to-digital conversion unit is used for converting a first current sampling signal output by the first current detection unit into a drain current of a push-stage amplifier and/or converting a second current sampling signal output by the second current detection unit into a drain current of a final-stage amplifier;
the analog-to-digital conversion unit is used for transmitting the drain current to the control unit.
9. Multi-channel device according to claim 1,
the control unit is used for determining a target amplifier according to a control instruction; the target amplifier is one of the push stage amplifier or the final stage amplifier;
the control unit is used for controlling the target amplifier to be started and controlling the rest amplifiers to be closed;
the control unit is used for adjusting the grid voltage of the target amplifier until the drain current of the target amplifier is within the static range of the target amplifier, and storing the current grid voltage of the target amplifier.
10. The multi-channel device of claim 9, wherein the control unit is configured to determine the target amplifier according to a preset gate voltage debugging sequence after the control unit obtains the control instruction.
11. The multi-channel device of claim 1, further comprising a plurality of rf front-end units, each of the rf front-end units being connected to an input of a corresponding one of the power amplification units.
12. The multi-channel device of claim 1, wherein the first current detection circuit is further configured to detect an operating current when the push stage amplifier outputs the rf signal; the second current detection circuit is further used for detecting the working current when the final amplifier outputs a radio frequency signal;
the control unit is also used for realizing current alarm according to the working current.
13. The multi-channel device of claim 1, wherein the control unit is connected to a port of a gate voltage debugging platform, and configured to display the drain current through the gate voltage debugging platform and obtain a gate voltage output by the gate voltage debugging platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023135545.3U CN214045575U (en) | 2020-12-23 | 2020-12-23 | Multi-channel device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023135545.3U CN214045575U (en) | 2020-12-23 | 2020-12-23 | Multi-channel device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214045575U true CN214045575U (en) | 2021-08-24 |
Family
ID=77341571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023135545.3U Active CN214045575U (en) | 2020-12-23 | 2020-12-23 | Multi-channel device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214045575U (en) |
-
2020
- 2020-12-23 CN CN202023135545.3U patent/CN214045575U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100582801C (en) | Batch detector methods and apparatus of power amplifier | |
| CN1925348B (en) | Standing-wave ratio detecting method and device | |
| US7193460B1 (en) | Circuit for controlling power amplifier quiescent current | |
| US7990221B2 (en) | Detector circuit and system for a wireless communication | |
| CN101374027B (en) | Automatic test system and method for 1dB compressing point of high-power radio frequency power-amplifying module | |
| CN101635943B (en) | Method and device for detecting broadband power | |
| CN101917196B (en) | Analog-to-digital joint type data acquisition device | |
| WO2018133332A1 (en) | Voltage standing wave ratio detection method and device for point of interface | |
| CN103973237A (en) | Staging overvoltage protection circuit of power amplifier | |
| CN110658443B (en) | Aging system for radio frequency front-end device | |
| CN214045575U (en) | Multi-channel device | |
| CN106569117A (en) | Testing method and testing apparatus, control method and control system | |
| CN114629448A (en) | Radio frequency power amplifying circuit and radio frequency front end module | |
| US20230034713A1 (en) | Auxiliary control circuit for power amplification module, power amplification module, and communication device | |
| US20110115507A1 (en) | Power delivery circuit monitoring | |
| CN112713862A (en) | Multi-channel device and method for determining grid voltage | |
| CN112636713A (en) | Circuit structure suitable for realizing radio frequency gain automatic switching control at receiving end of vector network analyzer | |
| CN101876672B (en) | Device for quickly debugging and testing grid voltage of power amplification module and method thereof | |
| CN108475982A (en) | A kind of switching power circuit and switch power supply current detection method | |
| CN114895102A (en) | High-isolation input/output stage large dynamic range power detection circuit | |
| CN110113011B (en) | Radio frequency power amplifier grid voltage calibration system, method and access network equipment | |
| CN104749513A (en) | Communication System And Method For Detecting Loading Variation Of Power Amplifier Thereof | |
| CN210465538U (en) | Self-adaptive wide-range radio frequency power meter | |
| CN116008643A (en) | Sampling value switching method and sampling circuit for variable threshold | |
| CN202522652U (en) | Analog chip circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |