CN108964623A - The radio-frequency power amplifier and its main circuit of one kind of multiple power modes - Google Patents
The radio-frequency power amplifier and its main circuit of one kind of multiple power modes Download PDFInfo
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Abstract
Description
技术领域technical field
本发明涉及射频功率放大器领域，具体涉及一种多种功率模式的射频功率放大器及其主电路。The invention relates to the field of radio frequency power amplifiers, in particular to a radio frequency power amplifier with multiple power modes and its main circuit.
背景技术Background technique
NB-IoT(Narrow Band Internet of Things，窄带物联网)是万物互联网络的一个重要分支。NB-IoT构建于蜂窝网络，只消耗大约180KHz的带宽，可直接部署于GSM网络(Global System for Mobile Communications，全球移动通讯系统)、UMTS网络(UniversalMobile Telecommunications System，通用移动通讯系统)或LTE网络(Long TermEvolution，长期演进)，以降低部署成本、实现平滑升级。NB-IoT (Narrow Band Internet of Things, Narrowband Internet of Things) is an important branch of the Internet of Everything. NB-IoT is built on a cellular network and only consumes about 180KHz of bandwidth. It can be directly deployed on a GSM network (Global System for Mobile Communications, Global System for Mobile Communications), a UMTS network (Universal Mobile Telecommunications System, Universal Mobile Communications System) or an LTE network ( Long Term Evolution, long-term evolution) to reduce deployment costs and achieve smooth upgrades.
NB-IoT是IoT领域一个新兴的技术，支持低功耗设备在广域网的蜂窝数据连接，也被叫作低功耗广域网(LPWAN)。NB-IoT支持待机时间长、对网络连接要求较高设备的高效连接。据说NB-IoT设备电池寿命可以提高至少10年，同时还能提供非常全面的室内蜂窝数据连接覆盖。NB-IoT is an emerging technology in the IoT field, which supports cellular data connections of low-power devices in wide area networks, also known as low-power wide area networks (LPWAN). NB-IoT supports efficient connection of devices with long standby time and high network connection requirements. It is said that NB-IoT device battery life can be improved by at least 10 years, while also providing very comprehensive indoor cellular data connection coverage.
在射频功率放大器中，以NB-IOT射频功率放大器为例，射频功率放大器的耗电量是很大的，为了延长电池的使用时间，往往需要射频功率放大器工作在不同的功率模式。在信号比较弱的时候，射频功率放大器会工作在高功率模式下来保证通讯质量。反之当信号很强的时候，射频功率放大器则会工作在低功率模式下来减小耗电。在一些情况下还需要让功率放大器提供衰减模式来满足系统要求。In the RF power amplifier, take the NB-IOT RF power amplifier as an example, the power consumption of the RF power amplifier is very large. In order to prolong the battery life, the RF power amplifier is often required to work in different power modes. When the signal is relatively weak, the RF power amplifier will work in high power mode to ensure the communication quality. Conversely, when the signal is strong, the RF power amplifier will work in a low power mode to reduce power consumption. In some cases, it is also necessary to let the power amplifier provide an attenuation mode to meet the system requirements.
目前传统的解决方案是，设计多条射频链路以及在输入输出端口增加开关电路来实现。高功率模式启动高功率功率放大器链路，低功率模式启动低功率功率放大器链路，衰减模式则通过开关电路以及衰减网络来实现。这样做会增大射频功率放大器的尺寸，占用更多射频功率放大器模块的体积，增大射频功率放大器模块的功耗，这对于NB-IOT功率放大器模块低功耗高集成度非常不利。The current traditional solution is to design multiple radio frequency links and add switch circuits at the input and output ports. The high power mode activates the high power amplifier chain, the low power mode activates the low power amplifier chain, and the attenuation mode is realized through the switch circuit and the attenuation network. Doing so will increase the size of the RF power amplifier, occupy more volume of the RF power amplifier module, and increase the power consumption of the RF power amplifier module, which is very unfavorable for the low power consumption and high integration of the NB-IOT power amplifier module.
发明内容Contents of the invention
针对上述问题，本发明拟提出一种新的多种功率模式的射频功率放大器及其主电路，以便一条射频链路实现3种功率模式，无需像传统解决方案那样需要三条射频链路。In view of the above problems, the present invention intends to propose a new radio frequency power amplifier with multiple power modes and its main circuit, so that one radio frequency link can realize three power modes, without requiring three radio frequency links like traditional solutions.
本发明实施例提供了一种多种功率模式的射频功率放大器主电路，包括第一功率放大器、第二功率放大器、第三功率放大器、衰减器，其中：所述第一功率放大器和所述衰减器并联连接，所述第二功率放大器和第三功率放大器并联连接，二者再串联，串联后第一功率放大器的一端连接射频输入端，第二功率放大器的一端连接射频输出端。An embodiment of the present invention provides a radio frequency power amplifier main circuit with multiple power modes, including a first power amplifier, a second power amplifier, a third power amplifier, and an attenuator, wherein: the first power amplifier and the attenuator The amplifiers are connected in parallel, the second power amplifier and the third power amplifier are connected in parallel, and the two are connected in series, and after series connection, one end of the first power amplifier is connected to the radio frequency input end, and one end of the second power amplifier is connected to the radio frequency output end.
进一步地，所述第一功率放大器、所述第三功率放大器、所述第二功率放大器的功率依次升高。Further, the power of the first power amplifier, the third power amplifier, and the second power amplifier increases sequentially.
进一步地，所述第一功率放大器、所述第二功率放大器、所述第三功率放大器的开闭由控制电路控制。Further, the opening and closing of the first power amplifier, the second power amplifier and the third power amplifier are controlled by a control circuit.
进一步地，所述主电路工作模式包括高功率模式、低功率模式、衰减模式的至少一种。Further, the working mode of the main circuit includes at least one of a high power mode, a low power mode and an attenuation mode.
进一步地，所述主电路工作在高功率模式时，所述控制电路控制打开所述第一功率放大器、所述第二功率放大器、所述第三功率放大器。Further, when the main circuit works in a high power mode, the control circuit controls to turn on the first power amplifier, the second power amplifier, and the third power amplifier.
进一步地，所述主电路工作在低功率模式时，所述控制电路控制打开所述第一功率放大器、所述第三功率放大器，关闭所述第二功率放大器。Further, when the main circuit works in a low power mode, the control circuit controls to turn on the first power amplifier and the third power amplifier, and turn off the second power amplifier.
进一步地，其中，所述第一功率放大器用于驱动所述第二功率放大器或/和所述第三功率放大器。Further, wherein, the first power amplifier is used to drive the second power amplifier or/and the third power amplifier.
进一步地，所述主电路工作在衰减模式时，所述控制电路控制关闭所述第一功率放大器、所述第二功率放大器，打开所述第三功率放大器，通过所述衰减器调节所述射频输出端的输出功率。Further, when the main circuit works in attenuation mode, the control circuit controls to turn off the first power amplifier and the second power amplifier, turn on the third power amplifier, and adjust the radio frequency through the attenuator. output power at the output.
进一步地，所述衰减器包括电阻R1、电容C1，所述电阻R1与所述电容C1串联连接。Further, the attenuator includes a resistor R1 and a capacitor C1, and the resistor R1 and the capacitor C1 are connected in series.
本发明实施例还提供一种多种功率模式的射频功率放大器，包括上述所述的多种功率模式的射频功率放大器主电路。An embodiment of the present invention also provides a radio frequency power amplifier with multiple power modes, including the above main circuit of the radio frequency power amplifier with multiple power modes.
本发明的实施例提供的技术方案，可以节省多种功率模式的射频功率放大器的芯片面积，增加射频功率放大器的集成度，降低射频功率放大器的耗能及成本。The technical solutions provided by the embodiments of the present invention can save the chip area of radio frequency power amplifiers in multiple power modes, increase the integration degree of radio frequency power amplifiers, and reduce the energy consumption and cost of radio frequency power amplifiers.
附图说明Description of drawings
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.
图1是传统的一种多种功率模式的射频功率放大器主电路组成示意图；Fig. 1 is a traditional radio frequency power amplifier main circuit composition schematic diagram of a kind of multiple power modes;
图2是本发明一实施例提供的一种多种功率模式的射频功率放大器主电路组成示意图；Fig. 2 is a schematic diagram of the main circuit composition of a radio frequency power amplifier with multiple power modes provided by an embodiment of the present invention;
图3是本发明一实施例提供的一种多种功率模式的射频功率放大器主电路的衰减器组成示意图；3 is a schematic diagram of the attenuator composition of the main circuit of a radio frequency power amplifier with multiple power modes provided by an embodiment of the present invention;
图4是本发明一实施例提供的一种多种功率模式的射频功率放大器组成示意图。Fig. 4 is a schematic composition diagram of a radio frequency power amplifier with multiple power modes provided by an embodiment of the present invention.
具体实施方式Detailed ways
为使本发明实施例的目的、技术方案和优点更加清楚，以下将结合附图和实施例，对本发明技术方案的具体实施方式进行更加详细、清楚的说明。然而，以下描述的具体实施方式和实施例仅是说明的目的，而不是对本发明的限制。其只是包含了本发明一部分实施例，而不是全部的实施例，本领域技术人员对于本发明的各种变化获得的其他实施例，都属于本发明保护的范围。In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the specific implementation manners of the technical solutions of the present invention will be described in more detail and clearly below in conjunction with the drawings and embodiments. However, the specific embodiments and examples described below are for the purpose of illustration only, rather than limiting the present invention. It only contains a part of the embodiments of the present invention, but not all of them. Other embodiments obtained by those skilled in the art through various changes of the present invention all belong to the protection scope of the present invention.
应该理解的是，虽然第一、第二、第三等用语可使用于本文中用来描述各种元件或组件，但这些元件或组件不应被这些用语所限制。这些用语仅用以区分一个元件或组件与另一元件或组件。因此，下述讨论之第一元件或组件，在不脱离本发明之内容下，可被称为第二元件或第二组件。It should be understood that although the terms first, second, third, etc. may be used herein to describe various elements or components, these elements or components should not be limited by these terms. These terms are only used to distinguish one element or component from another element or component. Therefore, a first element or component discussed below may be referred to as a second element or a second component without departing from the scope of the present invention.
图1是传统的一种多种功率模式的射频功率放大器主电路组成示意图，包括输入开关15、第一功率放大器11、第二功率放大器12、第三功率放大器13、衰减器14、输出开关16。Figure 1 is a schematic diagram of the main circuit composition of a traditional RF power amplifier with multiple power modes, including an input switch 15, a first power amplifier 11, a second power amplifier 12, a third power amplifier 13, an attenuator 14, and an output switch 16 .
如图1所示，第一功率放大器11和第二功率放大器12串联后与第三功率放大器13、衰减器14并联，并联后一端连接输入开关15，另一端连接输出开关16。输入开关15的另一端与射频输入端连接，输出开关16的另一端连接射频输出端。As shown in FIG. 1 , the first power amplifier 11 and the second power amplifier 12 are connected in parallel with the third power amplifier 13 and the attenuator 14 after being connected in series, and one end of the parallel connection is connected to the input switch 15 , and the other end is connected to the output switch 16 . The other end of the input switch 15 is connected to the radio frequency input end, and the other end of the output switch 16 is connected to the radio frequency output end.
传统的解决方案中，射频信号从射频输入端输入，通过一个输入开关来切换射频链路。主电路工作模式包括高功率模式、低功率模式、衰减模式的至少一种。In the traditional solution, the radio frequency signal is input from the radio frequency input terminal, and an input switch is used to switch the radio frequency link. The working mode of the main circuit includes at least one of a high power mode, a low power mode and an attenuation mode.
高功率模式开启第一功率放大器11和第二功率放大器12链路。一般工作在输入射频信号比较弱的时候，此时，射频功率放大器会工作在高功率模式下来保证通讯质量。In the high power mode, the link between the first power amplifier 11 and the second power amplifier 12 is turned on. Generally, when the input RF signal is relatively weak, the RF power amplifier will work in high power mode to ensure the communication quality.
低功率开启第三功率放大器13链路。一般工作在输入射频信号很强的时候，此时，射频功率放大器会工作在低功率模式下来减小耗电。Turn on the link of the third power amplifier 13 with low power. Generally, when the input RF signal is strong, the RF power amplifier will work in low power mode to reduce power consumption.
衰减模式开启衰减器14链路，输出再通过一个输出开关进行切换。以满足让射频功率放大器提供衰减模式来满足系统要求的情况。Attenuation mode opens the attenuator 14 chain, and the output is switched by an output switch. In order to meet the situation where the RF power amplifier provides an attenuation mode to meet the system requirements.
由于传统解决方案需要三条射频链路，会增大射频功率放大器的尺寸，占用更多射频功率放大器模块的体积，增大射频功率放大器模块的功耗，这对于功率放大器模块低功耗高集成度非常不利。Since the traditional solution requires three radio frequency links, it will increase the size of the radio frequency power amplifier, occupy more volume of the radio frequency power amplifier module, and increase the power consumption of the radio frequency power amplifier module. Very unfavorable.
图2是本发明一实施例提供的一种多种功率模式的射频功率放大器主电路组成示意图。Fig. 2 is a schematic diagram of a main circuit composition of a radio frequency power amplifier with multiple power modes provided by an embodiment of the present invention.
如图2所示，该主电路应用在NB-IOT射频功率放大器前端，包括第一功率放大器21、第二功率放大器22、第三功率放大器23、衰减器24。其中第一功率放大器21和衰减器24并联连接，第二功率放大器22和第三功率放大器23并联连接，二者再串联，串联后第一功率放大器21的一端连接射频输入端，第二功率放大器22的一端连接射频输出端。As shown in FIG. 2 , the main circuit is applied at the front end of the NB-IOT radio frequency power amplifier, including a first power amplifier 21 , a second power amplifier 22 , a third power amplifier 23 , and an attenuator 24 . Wherein the first power amplifier 21 is connected in parallel with the attenuator 24, the second power amplifier 22 is connected in parallel with the third power amplifier 23, and the two are connected in series again, and one end of the first power amplifier 21 is connected to the radio frequency input end after the series connection, and the second power amplifier One end of 22 is connected to the radio frequency output end.
第一功率放大器21、第三功率放大器23、第二功率放大器22的功率依次升高。第一功率放大器21、第二功率放大器22、第三功率放大器23的开闭由控制电路控制。The power of the first power amplifier 21 , the third power amplifier 23 and the second power amplifier 22 increases sequentially. The opening and closing of the first power amplifier 21, the second power amplifier 22 and the third power amplifier 23 are controlled by the control circuit.
多种功率模式的射频功率放大器主电路工作模式包括高功率模式、低功率模式、衰减模式的至少一种，其具体的功率范围根据实际需要进行划分。The working mode of the main circuit of the radio frequency power amplifier in multiple power modes includes at least one of high power mode, low power mode and attenuation mode, and its specific power range is divided according to actual needs.
主电路工作在高功率模式时，控制电路控制打开第一功率放大器21、第二功率放大器22、第三功率放大器23。第一功率放大器21用于驱动第二功率放大器22和第三功率放大器23。When the main circuit works in the high power mode, the control circuit controls to turn on the first power amplifier 21 , the second power amplifier 22 and the third power amplifier 23 . The first power amplifier 21 is used to drive the second power amplifier 22 and the third power amplifier 23 .
主电路工作在低功率模式时，控制电路控制打开第一功率放大器21、第三功率放大器23，关闭第二功率放大器22。第一功率放大器21用于驱动第三功率放大器23。When the main circuit works in the low power mode, the control circuit controls to turn on the first power amplifier 21 and the third power amplifier 23 and turn off the second power amplifier 22 . The first power amplifier 21 is used to drive the third power amplifier 23 .
主电路工作在衰减模式时，控制电路控制关闭第一功率放大器21，第二功率放大器22，打开第三功率放大器23，通过衰减器24调节射频输出端的输出功率。When the main circuit works in attenuation mode, the control circuit controls to turn off the first power amplifier 21, the second power amplifier 22, turn on the third power amplifier 23, and adjust the output power of the radio frequency output terminal through the attenuator 24.
这种主电路可以节省射频功率放大器的芯片面积，增加射频功率放大器的集成度，降低射频功率放大器的耗能，降低射频功率放大器的成本。尤其适用于NB-IOT射频功率放大器。The main circuit can save the chip area of the radio frequency power amplifier, increase the integration degree of the radio frequency power amplifier, reduce the energy consumption of the radio frequency power amplifier, and reduce the cost of the radio frequency power amplifier. Especially suitable for NB-IOT RF power amplifier.
图3是本发明一实施例提供的一种多种功率模式的射频功率放大器主电路的衰减器组成示意图。Fig. 3 is a schematic diagram of an attenuator composition of a main circuit of a radio frequency power amplifier with multiple power modes provided by an embodiment of the present invention.
衰减器24包括电阻R1、电容C1，电阻R1与电容C1串联连接组成RC衰减电路。The attenuator 24 includes a resistor R1 and a capacitor C1, and the resistor R1 and the capacitor C1 are connected in series to form an RC attenuation circuit.
图4是本发明一实施例提供的一种多种功率模式的射频功率放大器组成示意图。Fig. 4 is a schematic composition diagram of a radio frequency power amplifier with multiple power modes provided by an embodiment of the present invention.
该多种功率模式的射频功率放大器2包括上述图2的主电路。The radio frequency power amplifier 2 with multiple power modes includes the main circuit of FIG. 2 above.
需要说明的是，以上参照附图所描述的各个实施例仅用以说明本发明而非限制本发明的范围，本领域的普通技术人员应当理解，在不脱离本发明的精神和范围的前提下对本发明进行的修改或者等同替换，均应涵盖在本发明的范围之内。此外，除上下文另有所指外，以单数形式出现的词包括复数形式，反之亦然。另外，除非特别说明，那么任何实施例的全部或一部分可结合任何其它实施例的全部或一部分来使用。It should be noted that the various embodiments described above with reference to the accompanying drawings are only used to illustrate the present invention rather than limit the scope of the present invention. Those of ordinary skill in the art should understand that without departing from the spirit and scope of the present invention Any modifications or equivalent replacements made to the present invention shall fall within the scope of the present invention. Further, words appearing in the singular include the plural and vice versa unless the context otherwise requires. Additionally, all or a portion of any embodiment may be utilized with all or a portion of any other embodiment, unless stated otherwise.
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| CN109541442A (en) * | 2019-01-02 | 2019-03-29 | 珠海格力电器股份有限公司 | Precision-adjustable sampling circuit and measuring equipment |
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Application publication date: 20181207 |