CN113589876B - Power control circuit - Google Patents
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- CN113589876B CN113589876B CN202110970560.XA CN202110970560A CN113589876B CN 113589876 B CN113589876 B CN 113589876B CN 202110970560 A CN202110970560 A CN 202110970560A CN 113589876 B CN113589876 B CN 113589876B
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Abstract
Description
技术领域Technical field
本公开涉及一种功率控制电路，具体地，涉及一种使功率随控制电压的变化曲线在中小功率变缓的的功率控制电路。The present disclosure relates to a power control circuit, and in particular, to a power control circuit that slows down the change curve of power with control voltage at low and medium power.
背景技术Background technique
射频功率放大器，经常需要控制电压来控制输出功率的大小，即随着控制电压的增大，功率也随之增大。控制电压一般是线性增长的，从0V一直增长到2V，其步进有固定的精度。但功率，特别是GMSK等饱和功率放大器的输出功率一般不是随控制电压增大而线性增大的，一般功率在较小时增长较快，在功率很大，接近饱和功率附近时，增长很慢。这样就造成在中低功率时，功率随控制电压的变化曲线非常陡峭，导致功率控制精度下降。Radio frequency power amplifiers often require a control voltage to control the output power. That is, as the control voltage increases, the power also increases. The control voltage generally increases linearly, from 0V to 2V, and its steps have fixed accuracy. However, the power, especially the output power of saturated power amplifiers such as GMSK, generally does not increase linearly with the increase of the control voltage. Generally, the power increases quickly when it is small. When the power is very large and close to the saturation power, it increases very slowly. This results in a very steep change curve of power with control voltage at medium and low power, resulting in a decrease in power control accuracy.
发明内容Contents of the invention
本公开提出了一种功率随控制电压在中小功率处变化较缓的功率控制电路，并且其不影响在高功率时的最大输出功率的大小。The present disclosure proposes a power control circuit in which the power changes slowly with the control voltage at small and medium power, and does not affect the maximum output power at high power.
根据本发明的实施例，提供了一种功率控制电路，包括：反馈放大器，其接收输入控制电压V1和来自其输出端的反馈电压，并且被配置为连接到镜像电流电路；控制开关电路，其接收输入控制电压V1并且被连接到镜像电流电路，以提供电阻随所述输入控制电压V1变化的电路；镜像电流电路，其连接到反馈放大器的输出端、控制开关电路以及输出电压生成电路，以根据输入控制电压V1和控制开关电路的电阻提供镜像电流；输出电压生成电路，其连接到镜像电流电路，以根据接收到的镜像电流来提供变缓后的输出控制电压。According to an embodiment of the present invention, a power control circuit is provided, including: a feedback amplifier that receives an input control voltage V1 and a feedback voltage from its output terminal, and is configured to be connected to a mirror current circuit; a control switch circuit that receives The input control voltage V1 is connected to the mirror current circuit to provide a circuit whose resistance changes with the input control voltage V1; the mirror current circuit is connected to the output terminal of the feedback amplifier, the control switching circuit and the output voltage generating circuit to provide a circuit according to The input control voltage V1 and the resistor of the control switch circuit provide a mirror current; the output voltage generation circuit is connected to the mirror current circuit to provide a slowed output control voltage according to the received mirror current.
根据本发明的实施例，提供了一种功率控制电路，其中，所述反馈放大器包括运算放大器电路，并且其中，所述运算放大器被配置为使得所述运算放大器的-输入端连接到输入控制电压V1，并且使得所述运算放大器的+输入端通过所述镜像电流电路连接到所述运算放大器的输出端。According to an embodiment of the present invention, a power control circuit is provided, wherein the feedback amplifier includes an operational amplifier circuit, and wherein the operational amplifier is configured such that an input terminal of the operational amplifier is connected to an input control voltage V1, and causes the + input terminal of the operational amplifier to be connected to the output terminal of the operational amplifier through the mirror current circuit.
根据本发明的实施例，提供了一种功率控制电路，其中，所述控制开关电路包括：用作开关的N型管N1、电阻R1以及电阻R2，其中，所述N型管N1的栅极连接到输入控制电压V1，通过输入控制电压V1来控制所述N型管N1的导通和关断，所述N型管N1的源极连接到电阻R1的一端，并且其漏极连接到电阻R1的另一端，以与镜像电流电路连接；电阻R2被配置为与电阻R1串联，其一端连接到电阻R1，并且其另一端接地。According to an embodiment of the present invention, a power control circuit is provided, wherein the control switch circuit includes: an N-type tube N1 used as a switch, a resistor R1 and a resistor R2, wherein the gate of the N-type tube N1 Connected to the input control voltage V1, the input control voltage V1 controls the on and off of the N-type tube N1. The source of the N-type tube N1 is connected to one end of the resistor R1, and its drain is connected to the resistor. The other end of R1 is connected to the mirror current circuit; the resistor R2 is configured to be connected in series with the resistor R1, with one end connected to the resistor R1, and the other end connected to the ground.
根据本发明的实施例，提供了一种功率控制电路，其中，所述控制开关电路还包括滤波网络电路，其被配置为连接在所述N型管N1的栅极和输入控制电压V1之间，以滤除输入控制电压V1的波动。According to an embodiment of the present invention, a power control circuit is provided, wherein the control switch circuit further includes a filter network circuit configured to be connected between the gate of the N-type tube N1 and the input control voltage V1 , to filter out the fluctuation of the input control voltage V1.
根据本发明的实施例，提供了一种功率控制电路，其中，所述滤波网络电路包括低通滤波器，并且其中，所述低通滤波器包括电阻R3和电容C1，电阻R3的一端连接到输入控制电压V1并且其另一端连接到电容C1并连接到所述N型管N1的栅极，电容C1的一端与电阻R3连接并且其另一端接地。According to an embodiment of the present invention, a power control circuit is provided, wherein the filter network circuit includes a low-pass filter, and wherein the low-pass filter includes a resistor R3 and a capacitor C1, one end of the resistor R3 is connected to The control voltage V1 is input and its other end is connected to the capacitor C1 and the gate of the N-type tube N1. One end of the capacitor C1 is connected to the resistor R3 and the other end is grounded.
根据本发明的实施例，提供了一种功率控制电路，其中，所述镜像电流电路包括P型管P1和P型管P2，其中，所述P型管P1和P2的源极共同连接到电源电压，所述P型管P1和P2的栅极共同连接到所述反馈放大器A的输出端，以及所述P型管P1的漏极连接到所述控制开关电路并且所述P型管P2的漏极连接到输出电压生成电路以输出输出控制电压。According to an embodiment of the present invention, a power control circuit is provided, wherein the mirror current circuit includes a P-type tube P1 and a P-type tube P2, wherein the sources of the P-type tubes P1 and P2 are commonly connected to the power supply. voltage, the gates of the P-type tubes P1 and P2 are commonly connected to the output end of the feedback amplifier A, and the drain of the P-type tube P1 is connected to the control switch circuit and the P-type tube P2 The drain is connected to the output voltage generating circuit to output the output control voltage.
根据本发明的实施例，提供了一种功率控制电路，其中，所述输出电压生成电路包括电阻R4，其中，所述电阻R4的一端连接到所述镜像电流电路以输出输出控制电压，并且其另一端接地。According to an embodiment of the present invention, a power control circuit is provided, wherein the output voltage generating circuit includes a resistor R4, wherein one end of the resistor R4 is connected to the mirror current circuit to output an output control voltage, and its The other end is connected to ground.
根据本发明的实施例，提供了一种功率控制电路，其中，所述输出电压生成电路还包括补充电流源I1，其中，补充电流源I1的一端连接到电源电压，并且其另一端与电阻R4并联，以降低用于开启功率放大器的输入控制电压V1。According to an embodiment of the present invention, a power control circuit is provided, wherein the output voltage generating circuit further includes a supplementary current source I1, wherein one end of the supplementary current source I1 is connected to the power supply voltage, and the other end thereof is connected to the resistor R4 connected in parallel to reduce the input control voltage V1 used to turn on the power amplifier.
根据本发明的实施例，提供了一种功率控制电路，其中，在输入控制电压V1低并且N型管N1断开时，输出控制电压为 According to an embodiment of the present invention, a power control circuit is provided, wherein when the input control voltage V1 is low and the N-type transistor N1 is disconnected, the output control voltage is
根据本发明的实施例，提供了一种功率控制电路，其中，在输入控制电压V1增大并且N型管N1导通时，输出控制电压为其中，RN1是N型管N1的导通电阻。According to an embodiment of the present invention, a power control circuit is provided, in which when the input control voltage V1 increases and the N-type transistor N1 is turned on, the output control voltage is Among them, R N1 is the on-resistance of N-type tube N1.
根据本发明的实施例，提供了一种功率控制电路，其中，在输入控制电压V1逐渐增大到1V以上时，输出电压V2为 According to an embodiment of the present invention, a power control circuit is provided, wherein when the input control voltage V1 gradually increases to above 1V, the output voltage V2 is
根据本发明的实施例，使得中小功率随控制电压变化的曲线变缓，同时不影响最大输出功率的大小。According to the embodiments of the present invention, the curve of small and medium power varying with the control voltage is slowed down without affecting the maximum output power.
附图说明Description of drawings
图1是示出了根据本发明实施例的用于使功率随控制电压的变化曲线在中小功率变缓的功率控制电路的示意图；1 is a schematic diagram illustrating a power control circuit for slowing down the variation curve of power with control voltage at small and medium power according to an embodiment of the present invention;
图2是示出了根据本发明实施例的用于使功率随控制电压的变化曲线在中小功率变缓的功率控制电路的示意图；2 is a schematic diagram illustrating a power control circuit for slowing down the variation curve of power with control voltage at small and medium power according to an embodiment of the present invention;
图3是示出了根据本发明实施例的功率控制电路和功率放大器电路的示意图；以及3 is a schematic diagram showing a power control circuit and a power amplifier circuit according to an embodiment of the present invention; and
图4是根据本公开的实施例的输出功率随控制电压变化的曲线。4 is a plot of output power as a function of control voltage according to an embodiment of the present disclosure.
具体实施方式Detailed ways
在进行下面的详细描述之前，阐述贯穿本专利文件使用的某些单词和短语的定义可能是有利的。术语“耦接”“连接”及其派生词指两个或多个元件之间的任何直接或间接通信，无论那些元件是否彼此物理接触。术语“传输”、“接收”和“通信”及其派生词涵盖直接和间接通信。术语“包括”和“包含”及其派生词是指包括但不限于。术语“或”是包含性的，意思是和/或。短语“与……相关联”及其派生词是指包括、包括在……内、互连、包含、包含在……内、连接或与……连接、耦接或与……耦接、与……通信、配合、交织、并列、接近、绑定或与……绑定、具有、具有属性、具有关系或与……有关系等。术语“控制器”是指控制至少一个操作的任何设备、系统或其一部分。这种控制器可以用硬件、或者硬件和软件和/或固件的组合来实施。与任何特定控制器相关联的功能可以是集中式的或分布式的，无论是本地的还是远程的。短语“至少一个”，当与项目列表一起使用时，意指可以使用所列项目中的一个或多个的不同组合，并且可能只需要列表中的一个项目。例如，“A、B、C中的至少一个”包括以下组合中的任意一个：A、B、C、A和B、A和C、B和C、A和B和C。Before proceeding to the detailed description below, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document. The terms "coupled," "connected," and their derivatives refer to any direct or indirect communication between two or more elements regardless of whether those elements are in physical contact with each other. The terms "transmission", "reception" and "communication" and their derivatives cover direct and indirect communications. The terms "include" and "include" and their derivatives mean including, but not limited to. The term "or" is inclusive and means and/or. The phrase "associated with" and its derivatives means to include, include within, interconnect, contain, contain within, connect or be connected with, couple or be coupled with, and ... communicate, cooperate, interweave, juxtapose, approach, bind or be bound to, have, have attributes, have a relationship or have a relationship with, etc. The term "controller" refers to any device, system, or portion thereof that controls at least one operation. Such a controller may be implemented in hardware, or a combination of hardware and software and/or firmware. The functions associated with any particular controller can be centralized or distributed, whether local or remote. The phrase "at least one," when used in connection with a list of items, means that different combinations of one or more of the listed items may be used, and that only one item from the list may be required. For example, "at least one of A, B, C" includes any one of the following combinations: A, B, C, A and B, A and C, B and C, A and B and C.
贯穿本专利文件提供了其他特定单词和短语的定义。本领域普通技术人员应该理解，在许多情况下，即使不是大多数情况下，这种定义也适用于这样定义的单词和短语的先前和将来使用。Definitions of other specific words and phrases are provided throughout this patent document. It will be understood by those of ordinary skill in the art that in many, if not most, cases this definition will apply to prior and future uses of the words and phrases so defined.
在本专利文件中，变换块的应用组合以及子变换块的划分层级仅用于说明，在不脱离本公开的范围内，变换块的应用组合以及子变换块的划分层级可以具有不同的方式。In this patent document, the application combinations of transform blocks and the division levels of sub-transform blocks are only for illustration. The application combinations of transform blocks and the division levels of sub-transform blocks may be implemented in different ways without departing from the scope of the present disclosure.
以下讨论的图1至图4以及用于描述本专利文档中的本公开的原理的各种实施例仅作为说明，并且不应以任何方式解释为限制本公开的范围。本领域技术人员将理解，本公开的原理可以在任何适当布置的系统或设备中实施。1-4, discussed below, and the various embodiments used to describe the principles of the disclosure in this patent document are illustrative only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged system or device.
图1是示出了根据本发明实施例的用于使功率随控制电压的变化曲线在中小功率变缓的功率控制电路的示意图。FIG. 1 is a schematic diagram illustrating a power control circuit for slowing down the variation curve of power with control voltage at low and medium power according to an embodiment of the present invention.
参考图1，功率控制电路100包括反馈放大器A、控制开关电路、电流镜像电路和输出电压生成电路。所述反馈放大器A可以由运算放大器来构成，其用于接收输入控制电压V1和来自其输出端的反馈，以提供与输入控制电压V1相关的稳定输入控制电压。控制开关电路，根据输入电压的变化来调整开关的导通和关断，以调整控制开关电路中的电流。电流镜像电路，其通过对控制开关电路中的电流进行镜像来提供控制开关电路中的电流的镜像电流。输出电压生成电路，其被配置为根据镜像电流来提供变缓后的输出电压。Referring to FIG. 1 , the power control circuit 100 includes a feedback amplifier A, a control switching circuit, a current mirror circuit, and an output voltage generating circuit. The feedback amplifier A may be composed of an operational amplifier, which is used to receive the input control voltage V1 and feedback from its output terminal to provide a stable input control voltage related to the input control voltage V1. The switch circuit is controlled to adjust the on and off of the switch according to changes in input voltage to adjust the current in the control switch circuit. A current mirror circuit that provides a mirror current that controls the current in the switching circuit by mirroring the current in the control switching circuit. An output voltage generating circuit configured to provide a slowed output voltage based on the mirror current.
具体地，在图1中，运算放大器A的-输入端连接到输入控制电压V1，其输出端连接到镜像电流电路中的P型管P1的栅极，以通过P型管P1而反馈连接回运算放大器A的+输入端。Specifically, in Figure 1, the - input terminal of the operational amplifier A is connected to the input control voltage V1, and its output terminal is connected to the gate of the P-type tube P1 in the mirror current circuit to feed back through the P-type tube P1 The + input of operational amplifier A.
控制开关电路包括电阻R1、R2、N型管N1和滤波网络电路。在其中，电阻R1与N型管N1并联连接，其一端连接到放大器A的+输入端、P型管的漏极端以及N型管N1的漏极，并且其另一端连接到电阻R2以及N型管N1的源极。电阻R2的一端连接到电阻R1，并且其另一端接地。N型管N1与电阻R1并联，并且N型管N1的栅极与滤波网络电路连接，以通过滤波网络电路而连接到输入控制电压V1。The control switch circuit includes resistors R1, R2, N-type tube N1 and filter network circuit. Among them, the resistor R1 is connected in parallel with the N-type tube N1, one end of which is connected to the + input terminal of the amplifier A, the drain terminal of the P-type tube and the drain of the N-type tube N1, and the other end of which is connected to the resistor R2 and the N-type tube N1. The source of tube N1. One end of resistor R2 is connected to resistor R1, and the other end is connected to ground. The N-type tube N1 is connected in parallel with the resistor R1, and the gate of the N-type tube N1 is connected to the filter network circuit to be connected to the input control voltage V1 through the filter network circuit.
镜像电流电路包括P型管P1和P型管P2。其中P型管P1和P2的源极共同连接到电源电压，P型管P1和P2的栅极共同连接到反馈放大器A的输出端，并且P型管P1的漏极连接到N型管N1的漏极以及P型管P2的漏极连接到输出电压输出端口。The mirror current circuit includes P-type tube P1 and P-type tube P2. The sources of P-type tubes P1 and P2 are jointly connected to the power supply voltage, the gates of P-type tubes P1 and P2 are jointly connected to the output terminal of feedback amplifier A, and the drain of P-type tube P1 is connected to the N-type tube N1 The drain and the drain of P-type tube P2 are connected to the output voltage output port.
输出电压生成电路包括电阻R4。在其中，电阻R4一端连接到输出电压输出端口，并且其另一端接地。The output voltage generating circuit includes resistor R4. In it, one end of resistor R4 is connected to the output voltage output port, and its other end is connected to ground.
根据本公开的实施例，输出电压生成电路还可以包括补充电流源I1。在其中，补充电流源I1一端连接到电源电压，并且其另一端与电阻R4连接，并连接到输出电压输出端口。由于输入控制电压V1还被用于开启功率放大器，(例如，在0.16V处开启功率放大器)，为了防止在小功率时，输出控制电压的V2的曲线过缓，导致功率放大器的开启电压过大，所以增加了补充电流源I1，来保证功率放大器的开启电压不会过大。According to an embodiment of the present disclosure, the output voltage generating circuit may further include a supplementary current source I1. In it, one end of the supplementary current source I1 is connected to the supply voltage, and its other end is connected to the resistor R4 and connected to the output voltage output port. Since the input control voltage V1 is also used to turn on the power amplifier (for example, turning on the power amplifier at 0.16V), in order to prevent the curve of the output control voltage V2 from being too slow at low power, causing the turn-on voltage of the power amplifier to be too high , so a supplementary current source I1 is added to ensure that the turn-on voltage of the power amplifier is not too large.
根据本公开的实施例，在输入控制电压V1低(例如，约0.8V以下)时，用作控制开关的N型管N1是断开的，则P型管P1的电流为输入控制电压V1除以电阻R1和电阻R2之和的结果。其中，电阻R1和电阻R2约为2K-10Kohm的大电阻。此电流经过P型管P2镜像，并与补充电流I1相加后，乘以电阻R4得到输出控制电压V2，即，表示为以下等式(1)：According to an embodiment of the present disclosure, when the input control voltage V1 is low (for example, about 0.8V or less), the N-type transistor N1 used as the control switch is disconnected, and the current of the P-type transistor P1 is divided by the input control voltage V1 The result is the sum of resistors R1 and R2. Among them, resistor R1 and resistor R2 are about 2K-10Kohm large resistance. This current is mirrored by the P-type tube P2 and added to the supplementary current I1, then multiplied by the resistor R4 to obtain the output control voltage V2, that is, expressed as the following equation (1):
根据本公开的实施例，当输入控制电压V1继续增大(例如，大约0.8-1.0V)时，用作控制开关的N型管N1逐渐导通，并且N型管N1的导通电阻RN1逐渐减小。此时输出控制电压V2由以下等式(2)表示：According to an embodiment of the present disclosure, when the input control voltage V1 continues to increase (for example, about 0.8-1.0V), the N-type transistor N1 used as the control switch gradually turns on, and the on-resistance R N1 of the N-type transistor N1 slowing shrieking. At this time, the output control voltage V2 is expressed by the following equation (2):
根据本公开的实施例，当输入控制电压V1继续增大到1V以上时，用作控制开关的N型管N1的导通电阻RN1的大小相比于电阻R1的值很小，则两者并联后的电阻可以忽略不计。因此，上式输出控制电压V2的表达式变为(3)：According to the embodiment of the present disclosure, when the input control voltage V1 continues to increase to above 1V, the size of the on-resistance R N1 of the N-type transistor N1 used as the control switch is very small compared to the value of the resistor R1, then both The resistance in parallel connection is negligible. Therefore, the expression of the above output control voltage V2 becomes (3):
由于N型管N1的导通电阻RN1的大小是连续变化的，所以输出控制电压V2在根据公式(1)到公式(3)改变的过程中不会出现突变的情况，从而防止功率出现突变。Since the size of the on-resistance R N1 of the N-type tube N1 changes continuously, the output control voltage V2 will not have a sudden change in the process of changing according to the formula (1) to the formula (3), thereby preventing the power from changing suddenly. .
图2示出了根据本发明实施例的用于使功率随控制电压的变化曲线在中小功率变缓的功率控制电路的示意图。FIG. 2 shows a schematic diagram of a power control circuit for slowing down the variation curve of power with control voltage at low and medium power according to an embodiment of the present invention.
在图2中，滤波网络电路包括低通滤波器，其被配置有电阻R3和电容C1。在其中，N型管N1的栅极与电阻R3和电容C1的一端连接，并且电阻R3的另一端与输入控制电压V1连接，以及电容C1的另一端与接地连接。此外，与图1中类似的描述被省略。In Figure 2, the filter network circuit includes a low-pass filter configured with a resistor R3 and a capacitor C1. In it, the gate of the N-type tube N1 is connected to one end of the resistor R3 and the capacitor C1, the other end of the resistor R3 is connected to the input control voltage V1, and the other end of the capacitor C1 is connected to the ground. In addition, description similar to that in Fig. 1 is omitted.
根据本公开的实施例，电阻R3和电容C1构成输入控制电压V1的低通滤波器，其用于滤除输入控制电压的波动，从而防止对输出控制电压V2的精度造成影响。According to an embodiment of the present disclosure, the resistor R3 and the capacitor C1 form a low-pass filter for the input control voltage V1, which is used to filter out fluctuations in the input control voltage, thereby preventing the accuracy of the output control voltage V2 from being affected.
图3是示出了根据本发明实施例的用于使功率随控制电压的变化曲线在中小功率变缓的功率控制电路和功率放大器的示意图，以及图4是根据本公开的实施例的输出功率随控制电压变化的曲线。3 is a schematic diagram illustrating a power control circuit and a power amplifier for slowing down the variation curve of power with control voltage at small and medium power according to an embodiment of the present invention, and FIG. 4 is an output power according to an embodiment of the present disclosure. Curve as a function of control voltage.
参考图3，输入控制电压V1经过功率控制电路而被处理为输出控制电压V2。该输出控制电压V2被输入到功率放大器，以用于控制输出功率的大小。参考图4，在其中，横轴表示输入控制电压V1，纵轴表示功率放大器的输出功率Pout。曲线1表示应用本公开之前的输出功率随输入控制电压V1的变化，可以看出，在中小功率时，曲线非常陡峭。曲线2表示应用了本公开之后的输出功率随输入控制电压V1的变化，可以看出，在中小功率时，曲线明显变缓，但最大功率处的功率保持不变。Referring to FIG. 3 , the input control voltage V1 is processed into an output control voltage V2 through the power control circuit. The output control voltage V2 is input to the power amplifier for controlling the output power. Referring to FIG. 4 , the horizontal axis represents the input control voltage V1 and the vertical axis represents the output power Pout of the power amplifier. Curve 1 represents the change of the output power with the input control voltage V1 before applying the present disclosure. It can be seen that the curve is very steep at small and medium power. Curve 2 represents the change of the output power with the input control voltage V1 after applying the present disclosure. It can be seen that at small and medium power, the curve slows down significantly, but the power at the maximum power remains unchanged.
文本和附图仅作为示例提供，以帮助理解本公开。它们不应被解释为以任何方式限制本公开的范围。尽管已经提供了某些实施例和示例，但是基于本文所公开的内容，对于本领域技术人员而言显而易见的是，在不脱离本公开的范围的情况下，可以对所示的实施例和示例进行改变。The text and figures are provided as examples only to assist in understanding the present disclosure. They should not be construed as limiting the scope of the present disclosure in any way. Although certain embodiments and examples have been provided, based on the disclosure herein, it will be apparent to those skilled in the art that the illustrated embodiments and examples may be modified without departing from the scope of the disclosure. Make changes.
根据本发明的实施例，提供了一种在中小功率处使功率变化变缓的功率控制电路，即，本发明对控制电压进行修改，使其在中小功率阶段(电压比较低的范围内)曲线变缓。同时为了保证此修改不影响控制电压的最大值，即功率放大器输出功率的最大值，根据本发明的实施例在高控制电压时，保证了修改后的控制电压输出最终达到原有的最大值。According to embodiments of the present invention, a power control circuit is provided that slows down power changes at low and medium power. That is, the present invention modifies the control voltage so that it curves in the small and medium power stage (within a relatively low voltage range). Slow down. At the same time, in order to ensure that this modification does not affect the maximum value of the control voltage, that is, the maximum value of the power amplifier output power, according to the embodiment of the present invention, when the control voltage is high, it is ensured that the modified control voltage output eventually reaches the original maximum value.
尽管已经用示例性实施例描述了本公开，但是可以向本领域技术人员建议各种改变和修改。本公开旨在涵盖落入所附权利要求范围内的这种改变和修改。Although the present disclosure has been described with exemplary embodiments, various changes and modifications may be suggested to those skilled in the art. The present disclosure is intended to cover such changes and modifications as falling within the scope of the appended claims.
本发明中的任何描述都不应被理解为暗示任何特定的元件、步骤或功能是必须包括在权利要求范围内的必要元件。专利主题的范围仅由权利要求限定。Any description of the present invention should not be construed as implying that any particular element, step or function is essential to be included within the scope of the claims. The scope of patented subject matter is limited only by the claims.
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