CN113640576B - Radio frequency power detection circuit and electronic equipment - Google Patents
Radio frequency power detection circuit and electronic equipment Download PDFInfo
- Publication number
- CN113640576B CN113640576B CN202110926829.4A CN202110926829A CN113640576B CN 113640576 B CN113640576 B CN 113640576B CN 202110926829 A CN202110926829 A CN 202110926829A CN 113640576 B CN113640576 B CN 113640576B
- Authority
- CN
- China
- Prior art keywords
- transistor
- power detection
- module
- output
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 138
- 230000003321 amplification Effects 0.000 claims abstract description 39
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 39
- 239000003990 capacitor Substances 0.000 claims description 20
- 230000008878 coupling Effects 0.000 claims description 14
- 238000010168 coupling process Methods 0.000 claims description 14
- 238000005859 coupling reaction Methods 0.000 claims description 14
- 230000003139 buffering effect Effects 0.000 claims description 3
- 230000005669 field effect Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 8
- 230000003071 parasitic effect Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000003491 array Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Amplifiers (AREA)
Abstract
The embodiment of the invention provides a radio frequency power detection circuit and electronic equipment, and relates to the technical field of radio frequency circuit design. The differential input end of the radio frequency power detection circuit can be directly connected with the differential output end of the power amplifier, so that the output power of the power amplifier can be directly and accurately detected, and the influence of load balance and impedance change on the power detection precision is reduced; the output signals of the first square law operation circuit and the second square law operation circuit are added through the first addition operation circuit, so that odd harmonics in the output signals are counteracted, the area of the low-pass filter circuit is reduced, the accuracy of power detection output is improved, the operation amplification module and the exponent operation module form a current feedback loop, high-accuracy logarithmic operation is realized, the root mean square value of the output voltage and the input power is in a logarithmic linear relation, the power detection of a high dynamic range is realized, and meanwhile, the range of the output voltage can be effectively improved by utilizing the direct current amplification module.
Description
Technical Field
The invention relates to the technical field of radio frequency circuit design, in particular to a radio frequency power detection circuit and electronic equipment.
Background
In the application scenarios of millimeter wave satellite communication, 5G communication and the like, due to large free space loss, rain attenuation and atmospheric attenuation, a large-scale phased array and other technologies are generally required to be adopted to improve the equivalent omnidirectional radiation power of the transmitting array. In a large-scale phased array, due to factors such as process deviation, temperature variation, power supply voltage drop, complex electromagnetic environment and the like, the radio frequency performance of different channels has certain deviation, and the array surface performance is also deteriorated. In order to detect the working state of the channel in real time and perform corresponding compensation, a low-cost, low-power consumption and high-precision power detection module needs to be integrated in the phased array chip.
The existing power detection module is generally designed aiming at lower frequency band application, and when the existing power detection module is applied to millimeter wave large-scale phased arrays, the following problems exist: the existing power detection module is usually designed in a single-ended input way, the parasitic parameter of the millimeter wave frequency band has larger influence, the fundamental wave and harmonic wave of the radio frequency signal are coupled to a power supply network and output signals through parasitic capacitance, the normal work of other circuit modules is influenced, and meanwhile, the power detection precision is reduced; the output voltage and the input co-rate of the conventional power detection module are in a linear relation, so that high-dynamic-range and high-precision power detection is difficult to realize.
Disclosure of Invention
The invention aims at providing a radio frequency power detection circuit and an electronic device, for example, so as to realize high dynamic range and high precision power detection.
Embodiments of the invention may be implemented as follows:
In a first aspect, the invention provides a radio frequency power detection circuit, which comprises a differential input end, a first linear power detection sub-module, a second linear power detection sub-module, an operational amplification module, a direct current amplification module, an exponential operation module and a circuit output end;
The first input end and the second input end of the first linear power detection sub-module are connected with the differential input end, and the voltage output end of the first linear power detection sub-module is connected with the inverting input end of the operational amplification module and is used for generating output voltage which is proportional to the instantaneous power of an input signal and the feedback current in a preset weighting proportion;
The first input end and the second input end of the second linear power detection submodule are short-circuited, the voltage output end of the second linear power detection submodule is connected with the in-phase input end of the operational amplification module, and the second linear power detection submodule is used for generating zero input power and output reference voltage under the zero feedback condition;
The output end of the operational amplification module is connected with the third input end of the first linear power detection sub-module through an exponential operation module;
the output end of the operational amplification module is also connected with the circuit output end through the direct current amplification module and is used for improving the output voltage range of the circuit output end.
In an alternative embodiment, wherein the first linear power detection subcircuit includes:
The first input end, the first square law operation circuit, the second input end, the second square law operation circuit, the third input end, the proportional operation circuit, the first addition operation circuit, the low-pass filter circuit, the second addition operation circuit and the voltage output end;
The first square law operation circuit is connected with the first input end, the second square law operation circuit is connected with the second input end, the first square law operation circuit and the second square law operation circuit are respectively connected with the input end of the first addition operation circuit, and the output end of the first addition operation circuit is connected with the input end of the low-pass filter circuit;
the output end of the low-pass filter circuit is connected with the output end of the proportional operation circuit and the input end of the second addition operation circuit respectively, and the output end of the second addition operation circuit is connected with the voltage output end.
In an alternative embodiment, the second linear power detection sub-module is the same structure, size and layout as the first linear power detection sub-module.
In an alternative embodiment, the output signal and the input signal of the first square law operation circuit are square law relation.
In an alternative embodiment, the second square law operating circuit has the same structure, size, and layout as the first square law operating circuit.
In an alternative embodiment, the first square law operation circuit and the second square law operation circuit each comprise a differential common source field effect transistor amplifier working in a saturation region, and the drains of the transistors at two sides are connected.
In an alternative embodiment, the exponent operation module includes;
The common drain field effect transistor is connected with the input end and is used for shifting the direct current level so that the later-stage transistor works in a corresponding working area;
the common source field effect transistor is connected with the common drain field effect transistor and works in a subthreshold area, and an output signal and an input signal are in an exponential relationship;
And the current mirror circuit is connected with the common source field effect transistor and is used for buffering output current.
In an alternative embodiment, the dc amplification module includes an in-phase amplification circuit.
In an alternative embodiment, the third input of the second linear power detection sub-module is open.
In a second aspect, the present invention provides an electronic device, including a radio frequency power detection circuit according to any one of the foregoing embodiments.
Compared with the prior art, the scheme provided by the embodiment of the invention has at least the following beneficial effects including, for example:
According to the radio frequency power detection circuit and the electronic equipment, the differential input end can be directly connected with the differential output end of the power amplifier, so that the output power of the power amplifier can be directly and accurately detected, and the influence of load balance and impedance change on the power detection precision is reduced; the output signals of the first square law operation circuit and the second square law operation circuit are added through the first addition operation circuit, so that odd harmonics in the output signals are counteracted, the area of the low-pass filter circuit is reduced, the accuracy of power detection output is improved, the operation amplification module and the exponent operation module form a current feedback loop, high-accuracy logarithmic operation is realized, the root mean square value of the output voltage and the input power is in a logarithmic linear relation, the power detection of a high dynamic range is realized, and meanwhile, the range of the output voltage can be effectively improved by utilizing the direct current amplification module.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a radio frequency power detection circuit provided by the present application;
FIG. 2 is a schematic diagram of a first linear power detection module according to the present application;
FIG. 3 is a schematic diagram of a RF power detection circuit according to the present application;
fig. 4 is a schematic diagram illustrating an effect of the rf power detection circuit according to the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
In the application scenarios of millimeter wave satellite communication, 5G communication and the like, due to large free space loss, rain attenuation and atmospheric attenuation, a large-scale phased array and other technologies are generally required to be adopted to improve the equivalent omnidirectional radiation power of the transmitting array. In a large-scale phased array, due to factors such as process deviation, temperature variation, power supply voltage drop, complex electromagnetic environment and the like, the radio frequency performance of different channels has certain deviation, and the array surface performance is also deteriorated. In order to detect the working state of the channel in real time and perform corresponding compensation, a low-cost, low-power consumption and high-precision power detection module needs to be integrated in the phased array chip. The existing power detection module is generally designed aiming at lower frequency band application, and when the existing power detection module is applied to millimeter wave large-scale phased arrays, the following problems exist: the existing power detection module is usually designed in a single-ended input way, the parasitic parameter of the millimeter wave frequency band has larger influence, the fundamental wave and harmonic wave of the radio frequency signal are coupled to a power supply network and output signals through parasitic capacitance, the normal work of other circuit modules is influenced, and meanwhile, the power detection precision is reduced; the output voltage and the input co-rate of the conventional power detection module are in a linear relation, so that high-dynamic-range and high-precision power detection is difficult to realize.
In order to improve the above problems, the present application provides a radio frequency power detection circuit to realize high dynamic range and high precision power detection.
Referring to fig. 1, fig. 1 is a schematic diagram of a radio frequency power detection circuit 100 according to the present application. As shown IN fig. 1, the rf power detection circuit includes a differential input terminal IN, a first linear power detection sub-module 110, a second linear power detection sub-module 120, an operational amplification module 130, a dc amplification module 150, an exponential operation module 140, and a circuit output terminal OUT.
The first linear power detection sub-module 110 includes a first input terminal 1, a second input terminal 2, a third input terminal 3, and a voltage output terminal 4. The first input end 1 and the second input end 2 are respectively connected with the differential input end IN, wherein the first input end 1 is connected with the first differential port IN1, and the second input end 2 is connected with the second differential port IN 2. The first linear power detection sub-module 110 is configured to generate an output voltage proportional to the instantaneous power of the input signal and the feedback current in a predetermined weighted proportion.
The second linear power detection sub-module 120 includes a first input terminal 1, a second input terminal 2, a third input terminal and a voltage output terminal 4, the first input terminal 1 and the second input terminal 2 of the second linear power detection sub-module are short-circuited, the third input terminal 3 is open-circuited, and the second linear power detection sub-module is used for generating zero input power and an output reference voltage under the zero feedback condition.
The operational amplifier module 130 includes a non-inverting input terminal and an inverting input terminal, the voltage output terminal 4 of the first linear power detection sub-module 110 is connected to the inverting input terminal of the operational amplifier module 130, and the voltage output terminal 4 of the second linear power detection sub-module 120 is connected to the non-inverting input terminal of the operational amplifier module 130.
The output end of the operational amplification module 130 is connected with the third input end 3 of the first linear power detection sub-module 110 through the exponential operation module 140 to form a current feedback loop, so that high-precision logarithmic operation is realized, the root mean square value of the output voltage and the input power is in a logarithmic linear relationship, and power detection with a high dynamic range is realized.
The output terminal of the operational amplifier module 130 is further connected to the circuit output terminal OUT through the dc amplifier module 150, so as to increase the output voltage range of the circuit output terminal OUT.
The operational amplification module 130 and the exponent operation module 140 of the radio frequency power detection circuit 100 provided by the invention form a current feedback loop, high-precision logarithmic operation is realized, the root mean square value of output voltage and input power is in a logarithmic linear relation, high dynamic range power detection is realized, and meanwhile, the range of the output voltage can be effectively increased by utilizing the direct current amplification module 150.
IN an alternative embodiment, the differential input end IN includes a first differential port IN1 and a second differential port IN2, and the differential input end IN may be disposed after the differential output end of the radio frequency power amplifier and before the differential input end IN of the output matching network, directly connected to the differential output end of the power amplifier, so as to directly and accurately detect the output power of the power amplifier, and reduce the influence of load balance and impedance variation on the power detection precision.
The first and second linear power detection sub-modules 110 and 120 have the same structure, dimensions and layout, and the present embodiment only describes the first linear power detection sub-module 110.
Referring to fig. 2, in an alternative embodiment, the first linear power detection sub-module 110 includes: a first input terminal 1, a first square law operation circuit 111, a second input terminal 2, a second square law operation circuit 112, a third input terminal 3, a proportion operation circuit 113, a first addition operation circuit 114, a low-pass filter circuit 115, a second addition operation circuit 116, and a voltage output terminal 4.
The first square law operation circuit 111 is connected to the first input terminal 1, the second square law operation circuit 112 is connected to the second input terminal 2, the first square law operation circuit 111 and the second square law operation circuit 112 are respectively connected to the input terminal of the first addition operation circuit 114, and the output terminal of the first addition operation circuit 114 is connected to the input terminal of the low-pass filter circuit 115.
The proportional operation circuit 113 is connected to the third input terminal 3, and the output terminal of the low-pass filter circuit 115 and the output terminal of the proportional operation circuit 113 are connected to the input terminal of the second addition operation circuit 116, respectively, and the output terminal of the second addition operation circuit 116 is connected to the voltage output terminal 4.
The first input terminal 1 of the first linear power detection sub-module 110 is connected to the first differential port IN1, and the second input terminal 2 is connected to the second differential port IN2, for generating an output voltage proportional to the instantaneous power of the input signal and the feedback current IN a predetermined weighted proportion to the operational amplification module 130.
For the first linear power detection sub-module 110, if the input voltage difference between the first input terminal 1 and the second input terminal 2 is V in and the input current of the third input terminal 3 is I fb, the output voltage V o4 of the voltage output terminal 4 and the relationship between them are V o4＝a1·RMS(Vin)2+b1·Ifb+c1; wherein a1\b1\c1 is a set constant.
In an alternative embodiment, the first square law operation circuit 111 and the second square law operation circuit 112 have the same structure, size and layout, and the output signal and the input signal of the first square law operation circuit 111 have square law relation; the output signal and the input signal of the second square law operation circuit 112 have square law relation.
The first square law operation circuit 111 connected to the first input terminal 1 has an output signal (current signal) and an input signal (voltage signal) in square law relation V + is the voltage of the input signal at the first input terminal 1.
The second square law operation circuit 112 connected to the second input terminal 2 has an output signal in square law relation to the input signal as well: v - is the voltage of the input signal at the second input terminal 2.
The two input ends of the first addition operation circuit 114 are respectively connected with the first square law operation circuit 111 and the second square law operation circuit 112, the output end of the first addition operation circuit 114 is connected with the input end of the low-pass filter circuit 115, harmonic components are filtered by the low-pass filter circuit 115, odd harmonics in output signals are counteracted by the addition operation circuit, the area of the low-pass filter circuit 115 is reduced, and the accuracy of power detection output is improved.
The scaling factor of the scaling circuit 113 is b1, and the output terminal of the scaling circuit 113 and the output terminal of the low-pass filter circuit 115 are connected to the input terminal of the second adder 116, respectively, and the output terminal of the second adder 116 is connected to the voltage output terminal 4.
If the signals input by the two ports of the differential input terminal IN are V ± = ±acos ωt, the output signal expression of the first linear power detection submodule 110 is ：a3A2+b1Ifb+2c3＝(1/2)a3RMS(Vin)2+b1Ifb+2c3,, and when a 1＝(1/2)a3 and c 1＝2c3, the output signal expression of the first linear power detection submodule 110 meets the requirement of the expression.
In an alternative embodiment, the first square law operating circuit 111 and the second square law operating circuit 112 each comprise a differential common source field effect transistor amplifier operating in the saturation region, with the drains of the two side transistors connected.
The third input of the second linear power detection sub-module is open for generating zero input power and an output reference voltage V ref at zero feedback, in a possible implementation, it is assumed that reference voltage V ref = c.
The voltage output end 4 of the first linear power detection sub-module 110 is connected with the inverting input end of the operational amplification module 130, and the voltage output end 4 of the second linear power detection sub-module is connected with the non-inverting input end of the operational amplification module 130, and has V o4＝Vref due to the characteristic of virtual short circuit of the operational amplifier.
The input end of the exponential-phase module 140 is connected with the output end of the operational amplification module 130, the output end of the exponential-phase module 140 is connected with the third input end of the first linear power detection sub-circuit, the output current and the input voltage of the exponential-phase module 140 are in an exponential relationship, and the exponential-phase module comprises. I fb is the input current of the third input terminal, i.e. the output current of the exponent operation module 140, and Vout is the output voltage of the operational amplifier module 130.
In an alternative embodiment, a dc amplifying module 150 is disposed between the output terminal of the operational amplifying module 130 and the output terminal OUT of the circuit, so as to increase the output voltage range.
Based on the voltage and current relation determined by the circuit structure, a mathematical model can be constructed, and the mathematical relation between the output voltage and the input signal is obtained by solving the mathematical relation as follows:
Where Z L is the load impedance of the power amplifier, by reasonably selecting the weighting coefficients, a logarithmic linear relationship between the output voltage and the rms value of the input signal can be achieved, thus achieving the desired high dynamic range rf power detection circuit 100.
The exponent operation module 140 includes; the common drain field effect transistor is connected with the input end and is used for shifting the direct current level so that the later-stage transistor works in a corresponding working area; the common source field effect transistor is connected with the common drain field effect transistor and works in a subthreshold area, and an output signal and an input signal are in an exponential relation; and the current mirror circuit is connected with the common source field effect transistor and is used for buffering output current.
Referring to fig. 3 on the basis of fig. 1 and fig. 2, fig. 3 shows a schematic circuit diagram of a radio frequency power detection circuit according to an embodiment of the present application.
The first linear power detection sub-module 310 has the same structure as the second linear power detection sub-module 320, and only the first linear power detection sub-module 310 is described in this embodiment.
The first linear power detection sub-module includes a first input terminal 1, a second input terminal 2, a third input terminal 3, a voltage output terminal 4, a first coupling capacitor 311, a second coupling capacitor 312, a first bias resistor 313, a second bias resistor 314, a first detection transistor 315, a second detection transistor 316, a load transistor 317, and a filter capacitor 318.
The first input end 1 of the first linear power detection sub-module 310 is provided with a first coupling capacitor 311, the second input end 2 is provided with a second coupling capacitor 312, the sizes and structures of the first coupling capacitor 311 and the second coupling capacitor 312 are identical, and the first coupling capacitor 311 and the second coupling capacitor 312 have smaller capacitance values, so that the input impedance of the power detection module is improved, and the influence of the power detection module on the performance of the power amplifier is reduced.
If the capacitance value is C c, the gate parasitic capacitance C gs of the first detection transistor 315 and the second detection transistor 316 forms a capacitive voltage division network, and the actually input gate voltage is V gs＝CcVin/(Cc+Cgs); the first bias resistor 313 and the second bias resistor 314 are identical in size and structure, and are used for providing direct current bias for the input transistor, and the resistance value is large to reduce loss.
The first detection transistor 315 and the second detection transistor 316 have identical dimensions and structures, and preferably, the first detection transistor 315 and the second detection transistor 316 are field effect transistors, both operate in a saturation region, and the drain current and the gate voltage of the first detection transistor and the second detection transistor have the relationship of I d＝(μCoxW/2L)(Vgs-Vth)2, so that the square law relationship is satisfied, and the drains of the first detection transistor and the second detection transistor are directly connected, thereby canceling odd harmonics.
The bias transistor 316 is a P-channel field effect transistor connected in common source, and is configured to provide a direct current to the first detection transistor 315 and the second detection transistor 316; the load transistor 317 is a P-channel field effect transistor connected as a diode, and is configured to provide a load for the power detection output currents of the first detection transistor 315 and the second detection transistor 316 and the feedback current of the third input terminal 3, and has a resistance of 1/g m; the filter capacitor 318 is a metal-oxide-metal capacitor, and has a larger capacitance value for filtering out higher harmonics.
In some possible implementations, the operational amplifier module 330 is implemented by a two-stage operational amplifier structure with miller capacitance compensation, which takes a larger value to optimize the phase margin since it only works in the dc state.
The exponent operation module 340 includes: the voltage offset transistor 341 is an N-type field effect transistor connected by common drain, and is used for reducing the output voltage of the operational amplifier by one threshold voltage; the current bias transistor 342 provides a current bias for the voltage offset transistor 341; an exponential amplifying transistor 343 having a gate voltage lower than the threshold voltage, operating in the subthreshold region, and having an output current exponentially related to the input voltage: A pair of transistors 344 and 345, acting as a current mirror, are used to replicate and feed back the current of the exponential amplifying transistor 343 to the first linear power detection subcircuit.
The direct current amplifying module comprises 350 an in-phase amplifying circuit formed by operational amplifiers, wherein the core operational amplifier 351 is connected into an in-phase amplifying structure, the first feedback resistor 353 and the second feedback resistor 352 realize feedback of output voltage, and the proportion of voltage amplification is determined.
Accordingly, the schematic circuit diagram satisfies the relation given in fig. 1 and 2. Wherein the method comprises the steps ofThe resulting output voltage and input power relationship.
Fig. 4 is a schematic diagram illustrating the implementation of one embodiment of a high dynamic range rf power detection circuit according to the present invention. Under the 40 nanometer silicon process and the 1.2V power supply voltage, the high dynamic range radio frequency power detection circuit example simulates 160 microwatts of direct current power consumption, the output voltage range is 0.2 to 1V, the logarithmic linear power detection range reaches 30dB, and the maximum power detection range exceeds 40dB.
Based on the radio frequency power detection circuit provided by the embodiment, the invention also provides an electronic device, and the electronic device comprises the radio frequency power detection circuit according to any one of the previous embodiments.
It should be noted that, for brevity, the basic principles and the technical effects of the electronic device provided in the present embodiment are substantially the same as those provided by the rf power detection circuit provided in the foregoing embodiment, and the detailed description of the present embodiment is omitted, and reference is made to the related matters in the foregoing embodiments.
In summary, according to the radio frequency power detection circuit and the electronic device provided by the invention, the differential input end can be directly connected with the differential output end of the power amplifier, so that the output power of the power amplifier can be directly and accurately detected, and the influence of load balance and impedance change on the power detection precision is reduced; the output signals of the first square law operation circuit and the second square law operation circuit are added through the first addition operation circuit, so that odd harmonics in the output signals are counteracted, the area of the low-pass filter circuit is reduced, the accuracy of power detection output is improved, the operation amplification module and the exponent operation module form a current feedback loop, high-accuracy logarithmic operation is realized, the root mean square value of the output voltage and the input power is in a logarithmic linear relation, the power detection of a high dynamic range is realized, and meanwhile, the range of the output voltage can be effectively improved by utilizing the direct current amplification module.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. The radio frequency power detection circuit is characterized by comprising a differential input end, a first linear power detection sub-module, a second linear power detection sub-module, an operational amplification module, a direct current amplification module, an index operation module and a circuit output end; the structure, the size and the layout of the second linear power detection submodule are the same as those of the first linear power detection submodule;
The first input end and the second input end of the first linear power detection sub-module are connected with the differential input end, and the voltage output end of the first linear power detection sub-module is connected with the inverting input end of the operational amplification module and is used for generating output voltage which is proportional to the instantaneous power of an input signal and the feedback current in a preset weighting proportion;
The first input end and the second input end of the second linear power detection submodule are short-circuited, the voltage output end of the second linear power detection submodule is connected with the in-phase input end of the operational amplification module, and the second linear power detection submodule is used for generating zero input power and output reference voltage under the zero feedback condition;
The output end of the operational amplification module is connected with the third input end of the first linear power detection sub-module through an exponential operation module;
The output end of the operational amplification module is also connected with the circuit output end through the direct current amplification module and is used for improving the output voltage range of the circuit output end;
the first linear power detection sub-module further includes:
The voltage output terminal comprises a third input terminal, a voltage output terminal, a first coupling capacitor, a second coupling capacitor, a first bias resistor, a second bias resistor, a first detection transistor, a second detection transistor, a load transistor, a filter capacitor and a bias transistor; one end of the first coupling capacitor is connected with the first input end, the other end of the first coupling capacitor is connected with the grid electrode of the first detection transistor and one end of the first bias resistor, the other end of the first bias resistor is connected with one end of the second bias resistor, one end of the second coupling capacitor is connected with the second input end, the other end of the second coupling capacitor is connected with the grid electrode of the second detection transistor and the other end of the second bias resistor, the sources of the first detection transistor and the second detection transistor are grounded, the drains of the first detection transistor and the second detection transistor are respectively electrically connected with the drain electrode of the bias transistor, the drain electrode of the load transistor and the grid electrode of the load transistor after being connected with each other, the grid electrode of the load transistor is also connected with one end of the filter capacitor, the third input end and the voltage output end, and the other end of the filter capacitor is grounded;
The exponent operation module comprises: the voltage offset transistor, the grid of the current offset transistor is connected with the output end of the operational amplification module, the drain electrode of the voltage offset transistor is connected with a power supply, the source electrode of the voltage offset transistor is respectively connected with the drain electrode of the current offset transistor and the grid of the index amplification transistor, the source electrode of the current offset transistor is grounded, the grid of the current offset transistor is connected between the first offset resistor and the second offset resistor, the source electrode of the index amplification transistor is grounded, the drain electrode of the index amplification transistor is connected with the first end of the transistor pair, the transistor pair serves as a current mirror, and the second end of the transistor pair is connected with the third input end; the voltage offset transistor is used for shifting the direct current level so that the later-stage transistor works in a corresponding working area; the exponential amplification transistor works in a subthreshold region, and an output signal and an input signal are in an exponential relationship; the transistor pair is used for buffering output current.
2. The radio frequency power detection circuit of claim 1, wherein the dc amplification module comprises an in-phase amplification circuit.
3. The radio frequency power detection circuit of claim 1, wherein the third input of the second linear power detection sub-module is open.
4. An electronic device, characterized in that the electronic device comprises a radio frequency power detection circuit as claimed in any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110926829.4A CN113640576B (en) | 2021-08-12 | 2021-08-12 | Radio frequency power detection circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110926829.4A CN113640576B (en) | 2021-08-12 | 2021-08-12 | Radio frequency power detection circuit and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113640576A CN113640576A (en) | 2021-11-12 |
| CN113640576B true CN113640576B (en) | 2024-08-13 |
Family
ID=78421262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110926829.4A Active CN113640576B (en) | 2021-08-12 | 2021-08-12 | Radio frequency power detection circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113640576B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115144649B (en) * | 2022-06-30 | 2024-06-14 | 成都通量科技有限公司 | Self-detection circuit based on power detector |
| WO2024064365A1 (en) * | 2022-09-23 | 2024-03-28 | Viasat, Inc. | Low-power integrated radio frequency power detector |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1381731A (en) * | 2001-04-09 | 2002-11-27 | 恩尼技术公司 | Method and device for measuring sinusoidal signal instantaneous power |
| CN112583370A (en) * | 2020-12-10 | 2021-03-30 | 中国工程物理研究院电子工程研究所 | Power amplification device with high efficiency and high linearity |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9814793D0 (en) * | 1998-07-09 | 1998-09-09 | Ghassemi Foroozan | Power meter for ac electrical systems |
-
2021
- 2021-08-12 CN CN202110926829.4A patent/CN113640576B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1381731A (en) * | 2001-04-09 | 2002-11-27 | 恩尼技术公司 | Method and device for measuring sinusoidal signal instantaneous power |
| CN112583370A (en) * | 2020-12-10 | 2021-03-30 | 中国工程物理研究院电子工程研究所 | Power amplification device with high efficiency and high linearity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113640576A (en) | 2021-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Feng et al. | Pole-converging intrastage bandwidth extension technique for wideband amplifiers | |
| CN113640576B (en) | Radio frequency power detection circuit and electronic equipment | |
| US8659356B2 (en) | Power supply circuit of power amplifier, and terminal | |
| CN112986669B (en) | Radio frequency power detection circuit | |
| Stornelli et al. | Fully differential DDA-based fifth and seventh order Bessel low pass filters and buffers for DCR radio systems | |
| US7642849B2 (en) | Multiple-input and multiple-output amplifier | |
| WO2023011223A1 (en) | Power supply suppression circuit, chip and communication terminal | |
| CN101978600B (en) | Capacitance multiplier circuit | |
| KR20020025701A (en) | Amplifier circuit | |
| CN115940852A (en) | Low-phase-shift variable gain amplifier and radio frequency signal processing method | |
| USRE45634E1 (en) | Multiple-input and multiple-output amplifier using mutual induction in the feedback network | |
| Uygur et al. | Current mode MOSFET-only third order Butterworth low pass filter with DTMOS tuning technique | |
| Singh et al. | G m-boosted current-reuse inductive-peaking common source LNA for 3.1–10.6 GHz UWB wireless applications in 32 nm CMOS | |
| JP2006527957A (en) | Output power detection circuit | |
| JP5454366B2 (en) | Power amplifier module and portable information terminal | |
| US11909361B2 (en) | Broadband logarithmic detector with high dynamic range | |
| CN210405325U (en) | Power detector | |
| Santos et al. | A multimode CMOS PA with a single propagation path | |
| Chen et al. | Ultra-wideband high gain low group delay variation amplifier for phased-array radar system | |
| Sokol et al. | Two-stages differential amplifier for UWB applications with modified Cherry-Hooper structure | |
| CN107547052B (en) | Embedded multiplier and operational amplifier | |
| Martins et al. | A Class AB Programmable Gain Amplifier for an UWB Breast Cancer Detection System | |
| Lakshmi et al. | A 2.4 GHz LNA with Active Inductor in RF Transceiver for Wban | |
| CN118169463B (en) | Power detection circuit | |
| CN110868263B (en) | Power detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |