CN212785269U - Radio frequency circuit structure capable of adaptively adjusting power consumption and linearity - Google Patents
Radio frequency circuit structure capable of adaptively adjusting power consumption and linearity Download PDFInfo
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Abstract
A radio frequency circuit structure capable of adaptively adjusting power consumption and linearity comprises a radio frequency amplifier module and a power detector, wherein a signal input end of the radio frequency amplifier module is connected with a radio frequency input signal, and a signal output end of the radio frequency amplifier module is connected with a radio frequency output signal; the input end of the power detector is connected with a radio frequency input signal, and the output end of the power detector is connected with the bias current input end of the radio frequency amplifier; the device also comprises a current adder and a bias circuit module; the first input end of the current adder is connected with the output end of the power detector, and the second input end of the current adder is connected with the output end of the bias circuit module; the output end of the current adder is connected with the bias current input end of the radio frequency amplifier module; the radio frequency circuit structure adaptively adjusts the bias current of various radio frequency modules such as a radio frequency amplifier and the like according to the amplitude of a radio frequency signal, realizes the adaptive adjustment of the linearity of various radio frequency modules such as the radio frequency amplifier and the like according to the amplitude of the signal, improves the linearity under the condition of large signal input, and realizes low power consumption under the condition of small signal input.
Description
Technical Field
The utility model belongs to the technical field of the radio frequency microwave integrated circuit, more specifically relates to a radio frequency circuit structure of self-adaptation adjustment consumption and linearity.
Background
In a communication system, the larger the transmission power of the rf microwave ic is, the better communication signal and distance can be brought, so the rf microwave ic is required to have larger gain and output power, and further, the amplifier circuit of the rf microwave ic is also required to have higher gain and linearity.
In the prior art, an adopted radio frequency circuit structure is shown in fig. 1, a bias circuit module generates a bias current according to a preset value and inputs the bias current into a radio frequency amplifier module, and under the circuit structure, the linearity of various radio frequency modules such as a radio frequency amplifier is improved, and the current increase is the most direct method, but the following defects exist:
excessive gain and linearity require that the rf amplifier must be biased with sufficient current, resulting in increased power consumption of the overall circuit; when the radio frequency microwave circuit processes small signals, high linearity is not needed, but bias current is not reduced, and most of the power consumption of the circuit is wasted.
SUMMERY OF THE UTILITY MODEL
The utility model aims at, in order to overcome the not enough radio frequency circuit structure who has proposed a self-adaptation regulation consumption and linearity that prior art exists, according to the radio frequency signal amplitude, the bias current of various radio frequency modules such as self-adaptation regulation radio frequency amplifier realizes according to the linearity of various radio frequency modules such as signal amplitude self-adaptation regulation radio frequency amplifier, promotes the linearity under the large-signal, realizes the low-power consumption under the small-signal.
The utility model provides a following technical scheme.
A radio frequency circuit structure for self-adaptive adjustment of power consumption and linearity comprises a radio frequency amplifier module, wherein the radio frequency amplifier module is provided with a signal input end, a signal output end and a bias current input end, the signal input end is connected with a radio frequency input signal, and the signal output end is connected with a radio frequency output signal;
the radio frequency circuit structure further comprises a power detector; the input end of the power detector is connected with a radio frequency input signal, and the output end of the power detector is connected with the bias current input end of the radio frequency amplifier module.
The radio frequency circuit structure also comprises a current adder and a bias circuit module;
the first input end of the current adder is connected with the output end of the power detector, and the second input end of the current adder is connected with the output end of the bias circuit module; the output end of the current adder is connected with the bias current input end of the radio frequency amplifier module.
Preferably, the first and second electrodes are formed of a metal,
the radio frequency amplifier module comprises a first radio frequency module; the first radio frequency module is provided with a signal input end, a bias current input end and a signal output end; wherein,
the signal input end of the first radio frequency module is connected with a radio frequency input signal, and the signal output end of the first radio frequency module is connected with a radio frequency output signal;
the first input end of the current adder is connected with the output end of the power detector, and the second input end of the current adder is connected with the output end of the bias circuit module; the output end of the current adder is connected with the bias current input end of the first radio frequency module.
Preferably, the first and second electrodes are formed of a metal,
the radio frequency amplifier module comprises a second radio frequency module; the second radio frequency module is provided with a signal input end, a bias current input end and two signal output ends; wherein,
the signal input end of the second radio frequency module is connected with a radio frequency input signal, the second signal output end is connected with a radio frequency output signal, and the first signal output end is connected with the input end of the power detector;
the first input end of the current adder is connected with the output end of the power detector, and the second input end of the current adder is connected with the output end of the bias circuit module; the output end of the current adder is connected with the bias current input end of the second radio frequency module.
Preferably, the first and second electrodes are formed of a metal,
the second radio frequency module comprises a mixer; the mixer has two signal input terminals, a bias current input terminal and two signal output terminals; wherein,
a first signal input end of the frequency mixer is connected with a first radio frequency input signal, a second signal input end of the frequency mixer is connected with a second radio frequency input signal, a first signal output end of the frequency mixer is connected with an input end of the power detector, and a second signal output end of the frequency mixer is connected with a radio frequency output signal;
the first input end of the current adder is connected with the output end of the power detector, and the second input end of the current adder is connected with the output end of the bias circuit module; the output end of the current adder is connected with the bias current input end of the mixer.
The utility model adopts the above technical scheme, compare with prior art, have following technological effect:
1. the bias current output by the power detector under a large signal is large, so that the linearity of modules such as a biased radio frequency amplifier and the like is improved, and high performance is realized;
2. the bias current output by the power detector is small under a small signal, modules such as a radio frequency amplifier and the like do not need high linearity, and low power consumption is realized under the condition of not sacrificing performance;
3. under the condition that the output bias current of the power detector changes along with the signal amplitude under a medium signal, the output bias current is adjusted in a self-adaptive mode, and the power consumption is reduced under the condition that modules such as a radio frequency amplifier and the like realize high linearity performance.
Drawings
FIG. 1 is a circuit diagram of a prior art RF circuit configuration;
fig. 2 is a schematic circuit diagram of an embodiment 1 of a radio frequency circuit structure for adaptively adjusting power consumption and linearity according to the present invention;
fig. 3 is a schematic circuit diagram of an embodiment 2 of a radio frequency circuit structure for adaptively adjusting power consumption and linearity according to the present invention;
fig. 4 is a schematic circuit diagram of an embodiment 3 of a radio frequency circuit structure for adaptively adjusting power consumption and linearity according to the present invention;
fig. 5 is a schematic circuit diagram of an embodiment 4 of a radio frequency circuit structure for adaptively adjusting power consumption and linearity according to the present invention;
fig. 6 is a schematic circuit diagram of an embodiment 5 of a radio frequency circuit structure for adaptively adjusting power consumption and linearity according to the present invention.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1.
A radio frequency circuit structure for adaptively adjusting power consumption and linearity as shown in fig. 2 comprises a radio frequency amplifier module having a signal input terminal connected to a radio frequency input signal RFIN, a signal output terminal connected to a radio frequency output signal RFOUT, and a bias current input terminal.
The radio frequency circuit structure further comprises a power detector; the input end of the power detector is connected with a radio frequency input signal RFIN, and the output end of the power detector is connected with the bias current input end of the radio frequency amplifier module.
In this embodiment, the power detector is configured to detect an amplitude of an output signal of the rf amplifier module, that is, an amplitude of the rf output signal RFOUT, and generate a corresponding current based on a signal amplitude detection result, as a bias current of the rf amplifier module. The radio frequency circuit structure can self-adaptively adjust the magnitude of the bias current according to the magnitude of the signal, thereby adjusting the linearity and the power consumption of the radio frequency amplifier module.
Example 2.
A radio frequency circuit structure for adaptively adjusting power consumption and linearity as shown in fig. 3 comprises a radio frequency amplifier module having a signal input terminal connected to a radio frequency input signal RFIN, a signal output terminal connected to a radio frequency output signal RFOUT, and a bias current input terminal.
The radio frequency circuit structure also comprises a power detector, a current adder and a bias circuit module; the input end of the power detector is connected with a radio frequency input signal RFIN, the first input end of the current adder is connected with the output end of the power detector, and the second input end of the current adder is connected with the output end of the bias circuit module; the output end of the current adder is connected with the bias current input end of the radio frequency amplifier.
In this embodiment, the power detector is configured to detect an amplitude of an output signal of the rf amplifier, that is, an amplitude of the rf output signal RFOUT, and generate a corresponding current based on a detection result of the signal amplitude, where the current and a current generated by the bias circuit module are used as a bias current of the rf amplifier through the current adder. The radio frequency circuit structure not only can self-adaptively adjust the magnitude of the bias current according to the magnitude of the signal, but also can artificially preset the bias current, thereby adjusting the bias current more flexibly and also adjusting the linearity and the power consumption of the radio frequency amplifier module more flexibly.
Example 3.
Fig. 4 shows a radio frequency circuit structure for adaptively adjusting power consumption and linearity, which includes a first radio frequency module 10; the first radio frequency module 10 has a signal input terminal, a bias current input terminal and a signal output terminal; the signal input end of the first rf module 10 is connected to the rf input signal RFIN, and the second signal output end is connected to the rf output signal RFOUT.
The radio frequency circuit structure also comprises a power detector, a current adder and a bias circuit module; the input end of the power detector is connected with a radio frequency output signal RFOUT, the first input end of the current adder is connected with the output end of the power detector, and the second input end of the current adder is connected with the output end of the bias circuit module; the output end of the current adder is connected with the bias current input end of the first radio frequency module 10.
In this embodiment, the radio frequency amplifier module is replaced with a first radio frequency module having an adjustable linearity, so that the radio frequency circuit structure for adaptively adjusting power consumption and linearity is extended to other radio frequency modules having requirements on linearity.
The power detector is used for detecting the amplitude of the output signal of the first radio frequency module and generating corresponding current based on the detection result of the amplitude of the signal, and the current generated by the bias circuit module are jointly used as the bias current of the first radio frequency module through the current adder. The radio frequency circuit structure not only can self-adaptively adjust the magnitude of the bias current according to the magnitude of the signal, but also can artificially preset the bias current to flexibly adjust the bias current, so that the linearity and the power consumption of the first radio frequency module can be adjusted more flexibly.
Example 4.
Fig. 5 shows a radio frequency circuit structure for adaptively adjusting power consumption and linearity, which includes a second radio frequency module 20; the second rf module 20 has a signal input, a bias current input and two signal outputs; the signal input end of the second rf module 20 is connected to the rf input signal RFIN, and the second signal output end is connected to the rf output signal RFOUT.
The radio frequency circuit structure also comprises a power detector, a current adder and a bias circuit module; wherein, the input end of the power detector is connected with the first signal output end of the second radio frequency module 20, the first input end of the current adder is connected with the output end of the power detector, and the second input end of the current adder is connected with the output end of the bias circuit module; the output terminal of the current adder is connected to the bias current input terminal of the second rf module 20.
In this embodiment, the radio frequency amplifier module is replaced with the second radio frequency module having the following performance for the output signal, so that the radio frequency circuit structure for adaptively adjusting the power consumption and the linearity is expanded to not only other radio frequency modules having requirements on the linearity, but also the radio frequency module requiring following output, and the radio frequency circuit structure has a wider application range.
The power detector is used for detecting the amplitude of the output signal of the second radio frequency module, generating corresponding current together with the output signal based on the detection result of the signal amplitude, and the current generated by the bias circuit module are used as the bias current of the second radio frequency module together through the current adder. The radio frequency circuit structure not only can adjust the magnitude of the bias current in a self-adaptive mode according to the signal magnitude, but also can artificially preset the bias current, and can flexibly adjust the bias current, so that the linearity and the power consumption of the second radio frequency module can be adjusted more flexibly.
Example 5.
A radio frequency circuit structure for adaptively adjusting power consumption and linearity as shown in fig. 6 includes a mixer having two signal input terminals, a bias current input terminal and two signal output terminals; the mixer has a first signal input connected to the first rf input signal RFIN-1, a second signal input connected to the second rf input signal LOIN, and a second signal output connected to the rf output signal, i.e. the mixer-specific intermediate frequency output signal IFOUT.
The radio frequency circuit structure also comprises a power detector, a current adder and a bias circuit module; the input end of the power detector is connected with the first signal output end of the mixer, the first input end of the current adder is connected with the output end of the power detector, and the second input end of the current adder is connected with the output end of the bias circuit module; the output end of the current adder is connected with the bias current input end of the mixer.
In this embodiment, the second rf module is replaced by a mixer, so that the rf circuit structure for adaptively adjusting power consumption and linearity is further extended to the mixer module on the basis of the second rf module, and has a higher practical value.
The power detector is used for detecting the amplitude of the output signal of the mixer and generating corresponding current together with the output signal based on the detection result of the signal amplitude, and the current generated by the bias circuit module are used as the bias current of the mixer together through the current adder. The radio frequency circuit structure not only can self-adaptively adjust the magnitude of the bias current according to the signal magnitude, but also can artificially preset the bias current, and can flexibly adjust the bias current, so that the linearity and the power consumption of the frequency mixer can be more flexibly adjusted.
The utility model adopts the above technical scheme, compare with prior art, have following technological effect:
1. the bias current output by the power detector under a large signal is large, so that the linearity of modules such as a biased radio frequency amplifier and the like is improved, and high performance is realized;
2. the bias current output by the power detector is small under a small signal, modules such as a radio frequency amplifier and the like do not need high linearity, and low power consumption is realized under the condition of not sacrificing performance;
3. under the condition that the output bias current of the power detector changes along with the signal amplitude under a medium signal, the output bias current is adjusted in a self-adaptive mode, and the power consumption is reduced under the condition that modules such as a radio frequency amplifier and the like realize high linearity performance.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can understand the changes or substitutions within the technical scope of the present invention, and the present invention should be covered within the protection scope of the present invention.
Claims (5)
1. A radio frequency circuit structure for adaptively adjusting power consumption and linearity is characterized in that,
the radio frequency circuit structure comprises a radio frequency amplifier module, wherein the radio frequency amplifier module is provided with a signal input end, a signal output end and a bias current input end, the signal input end is connected with a radio frequency input signal, and the signal output end is connected with a radio frequency output signal;
the radio frequency circuit structure further comprises a power detector; the input end of the power detector is connected with a radio frequency input signal, and the output end of the power detector is connected with the bias current input end of the radio frequency amplifier module.
2. The RF circuit structure for adaptively adjusting power consumption and linearity of claim 1,
the radio frequency circuit structure further comprises a current adder and a bias circuit module;
the first input end of the current adder is connected with the output end of the power detector, and the second input end of the current adder is connected with the output end of the bias circuit module; the output end of the current adder is connected with the bias current input end of the radio frequency amplifier module.
3. The RF circuit structure for adaptively adjusting power consumption and linearity of claim 2,
the radio frequency amplifier module comprises a first radio frequency module having a signal input, a bias current input, and a signal output; wherein,
the signal input end of the first radio frequency module is connected with a radio frequency input signal, and the signal output end of the first radio frequency module is connected with a radio frequency output signal;
the first input end of the current adder is connected with the output end of the power detector, and the second input end of the current adder is connected with the output end of the bias circuit module; the output end of the current adder is connected with the bias current input end of the first radio frequency module.
4. The RF circuit structure for adaptively adjusting power consumption and linearity of claim 2,
the radio frequency amplifier module comprises a second radio frequency module, wherein the second radio frequency module is provided with a signal input end, a bias current input end and two signal output ends; wherein,
the signal input end of the second radio frequency module is connected with a radio frequency input signal, the second signal output end is connected with a radio frequency output signal, and the first signal output end is connected with the input end of the power detector;
the first input end of the current adder is connected with the output end of the power detector, and the second input end of the current adder is connected with the output end of the bias circuit module; the output end of the current adder is connected with the bias current input end of the second radio frequency module.
5. The RF circuit structure for adaptively adjusting power consumption and linearity of claim 4,
the second radio frequency module comprises a mixer having two signal inputs, a bias current input and two signal outputs; wherein,
a first signal input end of the frequency mixer is connected with a first radio frequency input signal, a second signal input end of the frequency mixer is connected with a second radio frequency input signal, a first signal output end of the frequency mixer is connected with an input end of the power detector, and a second signal output end of the frequency mixer is connected with a radio frequency output signal;
the first input end of the current adder is connected with the output end of the power detector, and the second input end of the current adder is connected with the output end of the bias circuit module; the output end of the current adder is connected with the bias current input end of the mixer.
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| CN202120387642.7U CN212785269U (en) | 2021-02-22 | 2021-02-22 | Radio frequency circuit structure capable of adaptively adjusting power consumption and linearity |
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