CN113904694A - Gain control circuit, device and radio frequency signal processing system - Google Patents
Gain control circuit, device and radio frequency signal processing system Download PDFInfo
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- CN113904694A CN113904694A CN202111270376.0A CN202111270376A CN113904694A CN 113904694 A CN113904694 A CN 113904694A CN 202111270376 A CN202111270376 A CN 202111270376A CN 113904694 A CN113904694 A CN 113904694A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
- H04B2001/0416—Circuits with power amplifiers having gain or transmission power control
Abstract
The invention relates to the technical field of gain control, in particular to a gain control circuit, gain control equipment and a radio frequency signal processing system, which comprise a frequency mixing gain component, a low-pass filter and a gain amplifier; the frequency mixing gain component is connected with the low-pass filter, and the low-pass filter is also connected with the gain amplifier; the gain amplifier is in two stages; the frequency mixing gain component and the first-stage gain amplifier are used for carrying out coarse gain adjustment; and the other stage of gain amplifier is used for gain fine adjustment. By adopting the technical scheme of the invention, the mixing gain component and the two-stage gain amplifier both carry out gain adjustment, thereby realizing high gain effect, avoiding the problems of volume increase, power consumption increase and the like of the radio-frequency signal amplification equipment, and ensuring the normal use of the radio-frequency signal amplification equipment.
Description
Technical Field
The invention relates to the technical field of gain control, in particular to a gain control circuit, gain control equipment and a radio frequency signal processing system.
Background
Radio frequency transmission is currently an important means of information transmission. In both a receiving link and a transmitting link of radio frequency transmission, a weak radio frequency signal needs to be amplified by a radio frequency signal amplifier. With the rapid development of wireless and mobile communication, the gain of the rf signal amplifier needs to be further improved to ensure the reliability and stability of signal transmission.
In the prior art, high gain is usually realized by cascading amplifiers in multiple stages. However, cascading too many amplifiers increases the size of the rf signal amplifier, increases power consumption, and affects the normal use of the rf signal amplifier.
Therefore, how to ensure normal use of the rf signal amplifier while increasing the gain of the rf signal amplifier is an urgent technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a gain control circuit, a device and a radio frequency signal processing system, so as to overcome the problem that the volume of the radio frequency signal amplifier is increased and the power consumption is increased due to the current cascade connection of too many amplifiers, which affects the normal use of the radio frequency signal amplifier.
In order to achieve the purpose, the invention adopts the following technical scheme:
a gain control circuit, comprising: a mixing gain component, a low pass filter and a gain amplifier; the frequency mixing gain component is connected with the low-pass filter, and the low-pass filter is also connected with the gain amplifier;
the gain amplifier is in two stages; the frequency mixing gain component and the first-stage gain amplifier are used for carrying out coarse gain adjustment; and the other stage of gain amplifier is used for gain fine adjustment.
Further, in the gain control circuit described above, the gain amplifier includes a variable gain amplifier.
Further, the gain control circuit further includes a peak detection component; the wave crest detection component is connected with the variable gain amplifier;
the wave crest detection component is used for detecting wave crest information, and the variable gain amplifier is used for adjusting gain according to the wave crest information.
Further, the gain control circuit described above further includes a signal converter;
if the gain control circuit is used for receiving signals, the signal converter comprises an analog-to-digital converter;
the frequency mixing gain component, the low-pass filter, the gain amplifier and the analog-to-digital converter sequentially process the signals;
if the gain control circuit is used for transmitting signals, the signal converter comprises a digital-to-analog converter;
the digital-to-analog converter, the low-pass filter, the gain amplifier and the frequency mixing gain component sequentially process the signals.
Further, in the gain control circuit described above, the mixing gain module includes a low noise amplifier, a voltage-to-current converter, a mixer, and a transimpedance amplifier connected to each other.
Further, in the gain control circuit described above, the mixers are divided into two groups to realize differential output.
Further, in the gain control circuit, the local oscillation source of one group of mixers is 0 °/180 °; the local oscillation source of the other group of mixers is 90/270 degrees.
Further, the invention also provides a gain amplification device, which comprises the automatic gain control circuit.
Further, the invention also provides a radio frequency signal processing system, which comprises the gain amplification device.
Further, the above-mentioned radio frequency signal processing system includes a radio frequency transmitter and/or a radio frequency receiver.
The gain control circuit, the gain control device and the radio frequency signal processing system comprise a frequency mixing gain component, a low-pass filter and a gain amplifier; the frequency mixing gain component is connected with the low-pass filter, and the low-pass filter is also connected with the gain amplifier; the gain amplifier is in two stages; the frequency mixing gain component and the first-stage gain amplifier are used for carrying out coarse gain adjustment; and the other stage of gain amplifier is used for gain fine adjustment. By adopting the technical scheme of the invention, the mixing gain component and the two-stage gain amplifier both carry out gain adjustment, thereby realizing high gain effect, avoiding the problems of volume increase, power consumption increase and the like of the radio-frequency signal amplification equipment, and ensuring the normal use of the radio-frequency signal amplification equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a circuit diagram of a gain control circuit according to an embodiment of the present invention;
fig. 2 is a circuit diagram of another embodiment of the gain control circuit of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 is a circuit diagram of a gain control circuit according to an embodiment of the present invention. As shown in fig. 1, the gain control circuit of the present embodiment includes: a mixer gain block 1, a low pass filter 2 and a gain amplifier 3. The mixing gain component 1 is connected with a low-pass filter 2, and the low-pass filter 2 is also connected with a gain amplifier 3.
In this embodiment, a two-stage gain amplifier is used. The mixing gain component 1 and the first-stage gain amplifier are used for carrying out coarse gain adjustment; and the other stage of gain amplifier is used for gain fine adjustment.
The gain control circuit of the present embodiment includes a mixing gain component 1, a low-pass filter 2 and a gain amplifier 3; the frequency mixing gain component 1 is connected with the low-pass filter 2, and the low-pass filter 2 is also connected with the gain amplifier 3; the gain amplifier 3 is in two stages; the mixing gain component 1 and the first-stage gain amplifier are used for carrying out coarse gain adjustment; and the other stage of gain amplifier is used for gain fine adjustment. By adopting the technical scheme of the embodiment, the mixing gain component 1 and the two-stage gain amplifier both carry out gain adjustment, so that a high gain effect is realized, the problems of volume increase, power consumption increase and the like of the radio-frequency signal amplification equipment are avoided, and the normal use of the radio-frequency signal amplification equipment is ensured.
In some alternative embodiments, both of the two stages of gain amplifiers are variable gain amplifiers. The variable gain amplifier can adjust the gain according to the input signal, and the variable gain amplifier can effectively improve the flexibility of the gain control circuit and realize the adjustment of the multistage gain.
As shown in fig. 1, in some alternative embodiments, the gain control circuit further includes a peak detection component 4; the wave crest detection component 4 is connected with the variable gain amplifier 3; the peak detection component 4 is used for detecting peak information, and the gain amplifier 3 is used for adjusting gain according to the peak information.
As shown in fig. 1, in some alternative embodiments, an input of the peak detection component 4 may be connected to an input of the low pass filter 2 to obtain peak information. The peak information detected by the peak detection component 4 can be converted into a voltage signal, the voltage signal is sent to the variable gain amplifier 3, and the variable gain amplifier 3 adjusts the gain according to the voltage signal to provide a criterion for the fast gain control.
In some optional embodiments, the gain control circuit further comprises a signal converter 5.
The gain control circuit can be applied to a radio frequency receiver and performs gain processing on a received radio frequency signal. As shown in fig. 1, specifically, if the gain control circuit is used for receiving the rf signal, the signal converter 5 is an analog-to-digital converter. The gain control circuit of this embodiment is configured to acquire an analog signal obtained by processing a radio frequency signal, and after the analog signal is acquired, the radio frequency signal is sequentially processed by the mixing gain component 1, the low-pass filter 2, the gain amplifier 3, and the analog-to-digital converter, and a digital signal is output. The frequency mixing gain component 1 performs frequency mixing processing and coarse gain adjustment, the low-pass filter 2 is mainly used for filtering processing, the two-stage gain amplifier performs coarse gain adjustment and fine gain adjustment, the analog-to-digital converter converts an analog signal into a digital signal, and the digital signal is processed by a subsequent processing module to further analyze information contained in the digital signal.
The gain control circuit can be applied in a radio frequency transmitter for generating a radio frequency signal. Specifically, if the gain control circuit is used to transmit radio frequency signals, the signal converter 5 is a digital-to-analog converter. And processing the baseband digital signal to obtain a digital signal. After the gain control circuit of this embodiment acquires the digital signal, the digital-to-analog converter, the low-pass filter 2, the gain amplifier 3, and the mixing gain component 1 sequentially process the radio frequency signal. Namely, the digital-to-analog converter, the low-pass filter 2, the gain amplifier 3 and the mixing gain component 1 are connected in sequence. The digital-to-analog converter converts a digital signal into an analog signal, the low-pass filter 2 is used for filtering processing, the gain amplifier 3 performs coarse gain adjustment and fine gain adjustment, the mixing gain component 1 performs mixing processing and coarse gain adjustment, the processed analog signal is output and processed by a subsequent processing module, and the analog signal is converted into a radio frequency signal and then output.
In some optional embodiments, the mixing gain component comprises a low noise amplifier, a voltage-to-current converter, a mixer, and a transimpedance amplifier connected. Alternatively, the mixer may be provided with two paths to realize differential input. The low-noise amplifier can select a source input structure, and single-network broadband matching is convenient to realize. The voltage-current converter is used for converting the voltage signal into a current signal. The mixer performs mixing processing of the received signal and a signal generated by the local oscillator, and improves the sensitivity of the gain control circuit so that the gain control circuit can stably operate while having a sufficient amplification amount and an appropriate passband. The transimpedance amplifier is used for further amplifying the current signal.
Fig. 2 is a circuit diagram of another embodiment of the gain control circuit of the present invention. As shown in fig. 2, if the gain control circuit is applied in a radio frequency receiver, the low noise amplifier 11 is connected to the voltage-to-current converter 12, the voltage-to-current converter 12 is connected to the mixer 13, and then the mixer 13 is divided into two branches, where each group of mixers 13 is connected to a transimpedance amplifier 14, a low pass filter 2 and the gain amplifier 3. As shown in fig. 2, includes a first branch L1 and a second branch L2. The gain amplifier 3 of each branch is correspondingly connected with the signal converter 5, and meanwhile, the peak detection component 4 is correspondingly arranged on each branch, so that the gain amplifier 3 can adjust the gain according to the peak information.
If the gain control circuit is applied to a radio frequency transmitter, the signal converter is connected with the gain amplifier through the low-pass filter, the gain amplifier is connected with the voltage-current converter, the voltage-current converter is connected with the frequency mixer through the low-noise amplifier, then the frequency mixer is divided into two branches, and each group of frequency mixers outputs one path of digital signals. Meanwhile, a wave crest detection component 4 is correspondingly arranged, so that the gain amplifier 3 can adjust the gain according to the wave crest information.
In some optional embodiments, the local oscillation source of the mixer 13 in one sub-circuit is 0 °/180 °; the local oscillation source of the mixer 13 in the other sub-circuit is 90 DEG/270 deg.
In some alternative embodiments, the low noise amplifier 11 is capable of adjustment on the order of-20 dB, -10dB, 0dB, 10dB, 20dB, and 30 dB; the combination of the voltage-current converter 12, the mixer 13 and the transimpedance amplifier 14 can realize the adjustment of the levels of-5 dB, 0dB, 4dB, 8dB, 12dB, 16dB, 20dB, 24dB, 28dB and 32 dB; the gain amplifier for carrying out coarse gain adjustment can realize the adjustment of 0dB, 5dB, 10dB and 15dB levels; the gain amplifier with fine gain adjustment can realize adjustment of-2 dB, -1dB, 0dB, 1dB, 2dB, 3dB, 4dB, 5dB, 6dB, 7dB, 8dB, 9dB, 10dB, 11dB, 12dB and 13dB level. Based on the above levels, a 1dB step, maximum 90dB gain can be combined.
By adopting the technical scheme of the embodiment, the mixing gain component 1 and the two-stage gain amplifier both carry out gain adjustment, so that a high gain effect is realized, the problems of volume increase, power consumption increase and the like of the radio-frequency signal amplification equipment are avoided, and the normal use of the radio-frequency signal amplification equipment is ensured.
Based on one general inventive concept, the present embodiment also provides a gain amplifying apparatus including the automatic gain control circuit of the above embodiment. By adopting the technical scheme of the embodiment, the mixing gain component 1 and the two-stage gain amplifier both carry out gain adjustment, so that a high gain effect is realized, the problems of volume increase, power consumption increase and the like of the radio-frequency signal amplification equipment are avoided, and the normal use of the radio-frequency signal amplification equipment is ensured.
Based on one general inventive concept, the present embodiment also provides a radio frequency signal processing system including the gain amplifying device of the above embodiment. The radio frequency signal processing system comprises a radio frequency transmitter and/or a radio frequency receiver. By adopting the technical scheme of the embodiment, the mixing gain component 1 and the two-stage gain amplifier both carry out gain adjustment, so that a high gain effect is realized, the problems of volume increase, power consumption increase and the like of the radio-frequency signal amplification equipment are avoided, and the normal use of the radio-frequency signal amplification equipment is ensured.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A gain control circuit, comprising: a mixing gain component, a low pass filter and a gain amplifier; the frequency mixing gain component is connected with the low-pass filter, and the low-pass filter is also connected with the gain amplifier;
the gain amplifier is in two stages; the frequency mixing gain component and the first-stage gain amplifier are used for carrying out coarse gain adjustment; and the other stage of gain amplifier is used for gain fine adjustment.
2. The gain control circuit of claim 1, wherein the gain amplifier comprises a variable gain amplifier.
3. The gain control circuit of claim 2, further comprising a peak detection component; the wave crest detection component is connected with the variable gain amplifier;
the wave crest detection component is used for detecting wave crest information, and the variable gain amplifier is used for adjusting gain according to the wave crest information.
4. The gain control circuit of claim 1, further comprising a signal converter;
if the gain control circuit is used for receiving signals, the signal converter comprises an analog-to-digital converter;
the frequency mixing gain component, the low-pass filter, the gain amplifier and the analog-to-digital converter sequentially process the signals;
if the gain control circuit is used for transmitting signals, the signal converter comprises a digital-to-analog converter;
the digital-to-analog converter, the low-pass filter, the gain amplifier and the frequency mixing gain component sequentially process the signals.
5. The gain control circuit of claim 1, wherein the mixing gain component comprises a low noise amplifier, a voltage-to-current converter, a mixer, and a transimpedance amplifier connected together.
6. The gain control circuit of claim 5, wherein the mixers are in two groups to achieve differential output.
7. The gain control circuit of claim 6, wherein the local oscillator sources of a set of mixers are 0 °/180 °; the local oscillation source of the other group of mixers is 90/270 degrees.
8. A gain amplifying device, characterized by comprising an automatic gain control circuit according to any one of claims 1 to 7.
9. A radio frequency signal processing system comprising the gain amplification device of claim 8.
10. The radio frequency signal processing system according to claim 9, characterized in that the radio frequency signal processing system comprises a radio frequency transmitter and/or a radio frequency receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111270376.0A CN113904694A (en) | 2021-10-29 | 2021-10-29 | Gain control circuit, device and radio frequency signal processing system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111270376.0A CN113904694A (en) | 2021-10-29 | 2021-10-29 | Gain control circuit, device and radio frequency signal processing system |
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| CN202111270376.0A Pending CN113904694A (en) | 2021-10-29 | 2021-10-29 | Gain control circuit, device and radio frequency signal processing system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1868308A2 (en) * | 2006-06-01 | 2007-12-19 | Integrant Technologies Inc. | Terrestrial-digital multimedia broadcasting receiver |
| US20090163165A1 (en) * | 2007-12-13 | 2009-06-25 | Kabushiki Kaisha Toshiba | Wireless communication circuit and wireless communication system |
| US20090209221A1 (en) * | 2008-02-14 | 2009-08-20 | Silicon Motion, Inc. | Receiver with low power consumption |
| US20120319774A1 (en) * | 2011-06-20 | 2012-12-20 | Broadcom Corporation | Multi-stage gain control in receivers and other circuits |
| CN106788511A (en) * | 2016-12-30 | 2017-05-31 | 北京时代民芯科技有限公司 | A kind of wideband radio receiver |
| CN109756240A (en) * | 2019-01-25 | 2019-05-14 | 广州全盛威信息技术有限公司 | Wireless communication receiver and gain control method with gain control |
-
2021
- 2021-10-29 CN CN202111270376.0A patent/CN113904694A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1868308A2 (en) * | 2006-06-01 | 2007-12-19 | Integrant Technologies Inc. | Terrestrial-digital multimedia broadcasting receiver |
| US20090163165A1 (en) * | 2007-12-13 | 2009-06-25 | Kabushiki Kaisha Toshiba | Wireless communication circuit and wireless communication system |
| US20090209221A1 (en) * | 2008-02-14 | 2009-08-20 | Silicon Motion, Inc. | Receiver with low power consumption |
| US20120319774A1 (en) * | 2011-06-20 | 2012-12-20 | Broadcom Corporation | Multi-stage gain control in receivers and other circuits |
| CN106788511A (en) * | 2016-12-30 | 2017-05-31 | 北京时代民芯科技有限公司 | A kind of wideband radio receiver |
| CN109756240A (en) * | 2019-01-25 | 2019-05-14 | 广州全盛威信息技术有限公司 | Wireless communication receiver and gain control method with gain control |
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