CN116015048A - Electromagnetic radiation equalizer - Google Patents
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- CN116015048A CN116015048A CN202310301462.6A CN202310301462A CN116015048A CN 116015048 A CN116015048 A CN 116015048A CN 202310301462 A CN202310301462 A CN 202310301462A CN 116015048 A CN116015048 A CN 116015048A
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- 230000005670 electromagnetic radiation Effects 0.000 title claims abstract description 25
- 238000005070 sampling Methods 0.000 claims abstract description 88
- 238000004146 energy storage Methods 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000005855 radiation Effects 0.000 abstract description 11
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 208000032365 Electromagnetic interference Diseases 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Abstract
The invention provides an electromagnetic radiation equalizer, comprising: a plurality of power supply loops and a central controller; each power supply loop comprises: a working circuit provided with an energy storage element; the equalization circuit is connected with the working circuit and used for sampling to obtain an electromagnetic interference sampling value of the working circuit and feeding the electromagnetic interference sampling value back to the central controller; receiving a deviation signal fed back by the central controller according to the electromagnetic interference sampling value, and outputting an adjusting signal according to the deviation signal; the control circuit is connected with the working circuit and generates a pulse modulation signal under the action of an adjustment signal, an output signal and a current sampling signal sampled from the working circuit; the central controller is used for respectively receiving the electromagnetic interference sampling values fed back by the equalization circuit and determining deviation signals of the electromagnetic interference sampling values. The beneficial effects are that: according to the invention, the deviation adjustment is carried out on each power supply loop according to the electromagnetic interference sampling value obtained by sampling, so that the electromagnetic interference radiation of each power supply loop is uniform, and the performance of the system is improved.
Description
Technical Field
The invention relates to the technical field of electromagnetic radiation equalization, in particular to an electromagnetic radiation equalizer.
Background
In portable electronic products powered by batteries, a power supply system is often required to provide positive and negative multiple voltages, and the power supply system outputs a voltage after reducing an input high voltage to a lower voltage through a BUCK converter. In order to ensure long-time and stable operation of a power supply system and achieve the aim of quickly replacing an energy storage medium, the prior art integrates multiple power supplies to supply power, and the multiple power supply system outputs voltage at the same time, so that the system is widely applied to systems requiring multiple power supplies to supply power.
However, when the switching tube is turned on or off along with the high or low level in the existing power system, current peaks are generated due to the influence of parasitic inductance and capacitance in the circuit, and these peaks contain a large amount of harmonic components, which cause higher electromagnetic interference (EMI, electro Magnetic Interference) radiation, and the electromagnetic interference radiation generated in different power systems is different. Referring to the electromagnetic radiation effect diagram of fig. 1, vouta, voutb, voutc and Voutd in fig. 1 are output voltages of four power supply circuits, respectively, it can be seen that the output voltage slopes of the output stage circuits of the power supply circuits in the prior art are different, and the phenomenon of non-uniform electromagnetic interference radiation easily occurs in a multi-power supply system, so as to affect the performance of the system.
Disclosure of Invention
In order to solve the technical problems, the invention provides an electromagnetic radiation equalizer.
The technical problems solved by the invention can be realized by adopting the following technical scheme:
an electromagnetic radiation equalizer comprising: a plurality of power supply loops and a central controller connected with the plurality of power supply loops;
each power supply loop comprises:
the working circuit is provided with an energy storage element, and is controlled to alternately switch between a charging mode and a discharging mode under the action of a pulse modulation signal so as to output an output signal;
the equalization circuit is connected with the working circuit and used for sampling an electromagnetic interference sampling value of the working circuit and feeding the electromagnetic interference sampling value back to the central controller; receiving a deviation signal fed back by the central controller according to the electromagnetic interference sampling value, and outputting an adjustment signal according to the deviation signal;
the control circuit is connected with the working circuit and generates the pulse modulation signal under the action of the adjusting signal, the output signal and a current sampling signal sampled from the working circuit;
the central controller is used for respectively receiving the electromagnetic interference sampling values fed back by the equalization circuit and determining the deviation signals of the electromagnetic interference sampling values.
Preferably, the equalization circuit includes a sensing circuit, the sensing circuit including:
the power supply circuit comprises a plurality of first comparators, a first control circuit and a second control circuit, wherein each first comparator is used for comparing a power supply end voltage input by the power supply circuit with a reference signal to obtain a first comparison signal; the voltage values of the reference signals connected with the first comparators are different;
and the digital-to-analog converter is connected with the plurality of first comparators and is used for obtaining the electromagnetic interference sampling value according to the first comparison signals output by the plurality of first comparators.
Preferably, the equalization circuit further includes: and the adjusting control circuit is used for receiving the deviation signal fed back by the central controller and performing analog-to-digital conversion on the deviation signal to obtain the adjusting signal.
Preferably, the central controller includes:
the average value operation circuit is used for receiving the electromagnetic interference sampling values and carrying out average processing on the electromagnetic interference sampling values of all the power supply loops to obtain an electromagnetic interference sampling average value;
and the first input end of each deviation calculation circuit is connected with the output end of the average value calculation circuit, and the second input end of each deviation calculation circuit is respectively connected with each equalization circuit and is used for respectively calculating the deviation of each electromagnetic interference sampling value and the average value of the electromagnetic interference sampling value to obtain a deviation signal.
Preferably, the control circuit includes:
an error amplifier for comparing a reference voltage with the voltage feedback signal to obtain an error amplified signal;
a second comparator for comparing the error amplified signal with the current sampling signal to generate a second comparison signal;
and the driver is respectively connected with the second comparator and the equalizing circuit and is used for generating the pulse modulation signal according to the second comparison signal and the adjusting signal.
Preferably, the method further comprises: a detection resistor connected in series with the working circuit;
the current sampling signal is generated by a current detection circuit, and the current detection circuit is used for detecting the current flowing through the detection resistor and generating the current sampling signal after multiplying a feedback coefficient.
Preferably, the working circuit includes:
the charging control branch is connected between an input end and an intersection point;
the charge and discharge branch is connected between the junction and an output end;
the discharge control branch is connected between the junction and the grounding end;
the energy storage element is connected in series on the charge-discharge branch.
Preferably, the charging control branch includes: the source electrodes and the drain electrodes of the pull-up tubes are connected in parallel, and the grid electrode of each pull-up tube is connected with the pulse modulation signal and is used for being controlled to be turned on or off under the action of the pulse modulation signal respectively so as to control the quantity of the turned-on pull-up tubes.
Preferably, the discharge control branch includes: the source electrodes and the drain electrodes of the pull-down tubes are connected in parallel, and the grid electrode of each pull-down tube is connected with the pulse modulation signal and is used for being controlled to be turned on or off under the action of the pulse modulation signal respectively so as to control the quantity of the turned-on pull-down tubes.
Preferably, when the working circuit is in a charging mode, the charging control branch circuit and the charging and discharging branch circuit are conducted, and the discharging control branch circuit is disconnected, so that the current input by the input end charges the energy storage element;
when the working circuit is in a discharging mode, the switching device group controls the discharging control branch and the charging and discharging branch to be conducted, and the charging control branch is disconnected, so that the energy storage element discharges the output end.
The technical scheme of the invention has the advantages that:
according to the invention, the electromagnetic interference of the power supply loops is sampled, and then the deviation adjustment is carried out on each power supply loop according to the electromagnetic interference sampling value obtained by sampling, so that the electromagnetic interference radiation of each power supply loop is uniform, and the performance of the system is improved.
Drawings
FIG. 1 is a diagram showing the effect of electromagnetic radiation on a multi-power system according to the prior art;
FIG. 2 is a schematic diagram of an electromagnetic radiation equalizer according to a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of an equalization circuit according to a preferred embodiment of the present invention;
FIG. 4 is a schematic diagram of a sensing circuit according to a preferred embodiment of the invention;
FIG. 5 is a schematic waveform diagram of a key node according to a preferred embodiment of the present invention;
FIG. 6 is a schematic diagram of an adjustment control circuit according to a preferred embodiment of the invention;
FIG. 7 is a schematic circuit diagram of a central controller according to a preferred embodiment of the present invention;
FIG. 8 is a schematic diagram of a second comparator and driver according to a preferred embodiment of the present invention;
FIG. 9 is a schematic diagram of the internal circuit of the driver according to the preferred embodiment of the invention;
FIG. 10 is a schematic diagram of a charge control leg and a discharge control leg according to a preferred embodiment of the present invention;
FIG. 11 is a graph showing the effect of electromagnetic radiation on a multi-power system employing an electromagnetic radiation equalizer according to a preferred embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
The electromagnetic radiation equalizer provided by the embodiment of the invention is applied to a multi-power system, as shown in fig. 2, and comprises a plurality of power supply loops (1A, 1B, 1C, 1D … …) and a central controller 2 connected with the plurality of power supply loops (1A, 1B, 1C, 1D … …); the four power supply circuits 1A, 1B, 1C, and 1D are exemplified below, and the structures of the four power supply circuits and the equalizing method are similar. Wherein 11A, 11B, 11C and 11D are equalization circuits in four power supply loops, respectively; 12A, 12B, 12C, and 12D are error amplifiers in four power supply loops, respectively; 13A, 13B, 13C and 13D are comparison drivers in four power supply loops, respectively; 14A, 14B, 14C, and 14D are current detection circuits in four power supply loops, respectively; 15A, 15B, 15C, and 15D are output stage circuits in the operation circuits of the four power supply circuits, respectively, the output stage circuits including a charge control branch and a discharge control branch for performing switching control of the charge mode and the discharge mode.
Further, coa, cob, coc and Cod are energy storage elements in four power supply loops, respectively; loa, lob, loc and Lod are the inductive elements in the four power supply loops, respectively, and Vouta, voutb, voutc and Voutd are the output voltages of the four power supply loops, respectively.
The following embodiments further illustrate the structure of the power circuit 1A and electromagnetic radiation equalization, and the power circuits 1B, 1C and 1D are similar to the power circuit 1A, and will not be described in detail.
Wherein, power supply circuit 1A includes:
the working circuit is provided with an energy storage element Coa, and is controlled to alternately switch between a charging mode and a discharging mode under the action of a pulse modulation signal so as to output an output signal Vouta;
the equalization circuit 11A is connected with the working circuit and is used for sampling an electromagnetic interference sampling value A1 of the working circuit and feeding the electromagnetic interference sampling value A1 back to the central controller 2; and receiving a deviation signal A2 fed back by the central controller 2 according to the electromagnetic interference sampling value A1, and outputting an adjusting signal according to the deviation signal A2;
the control circuit is connected with the working circuit and generates a pulse modulation signal under the action of the adjusting signal, the output signal Vouta and a current sampling signal sampled from the working circuit;
the central controller 2 is configured to receive the electromagnetic interference sampling values A1 fed back by the equalization circuit 11A, and determine deviation signals A2 of the electromagnetic interference sampling values A1.
As a preferred embodiment, as shown in fig. 3 and 4, the equalizing circuit 11A includes a sensing circuit 111, and the sensing circuit 111 includes:
a plurality of first comparators (COMP 1, COMP2, COMP 3), each of which is used for comparing the power supply terminal voltage input by the power supply loop 1A with a reference signal to obtain a first comparison signal; the voltage values of the reference signals connected with the first comparators are different;
the digital-to-analog converter DAC is connected with the first comparators (COMP 1, COMP2 and COMP 3) and is used for obtaining electromagnetic interference sampling values according to first comparison signals output by the first comparators (COMP 1, COMP2 and COMP 3).
Specifically, in this embodiment, the electromagnetic interference sampling value is obtained by comparing the power supply terminal voltage VDD input by the power supply circuit 1A with reference signals of different voltages, respectively, and then performing digital-to-analog conversion on the comparison result.
Furthermore, the comparison process with the reference signal is implemented by using a plurality of first comparators, in this embodiment, three first comparators are set as examples, namely, a comparator COMP1, a comparator COMP2 and a comparator COMP3, where the comparator COMP1 compares the power supply terminal voltage VDD with the reference signal Vref1, and when the power supply terminal voltage VDD is greater than the voltage of the reference signal Vref1, the LVL1 output by the comparator COMP1 is at a high level; otherwise, a low level is output. The comparator COMP2 compares the power supply terminal voltage VDD with the reference signal Vref2 and then outputs LVL2; the comparator COMP3 compares the power supply terminal voltage VDD with the reference signal Vref4 and then outputs LVL3; the digital-to-analog converter DAC is configured to perform digital-to-analog conversion processing on the three comparison results LVL1, LVL2, and LVL3, to obtain an electromagnetic interference sampling value A1.
Further, referring to fig. 5, the voltage values of the reference signals Vref1, vref2, and Vref3 are different, and are sequentially changed in an increasing or decreasing manner. V in FIG. 5 SW Waveform diagram of output signal of output stage circuit, V DD Is a waveform diagram of the power terminal voltage VDD. According to the embodiment of the invention, the interval of the sampled electromagnetic interference sampling value is refined by setting the reference signals with a plurality of different voltage values, so that the subsequent equalization control effect is better.
As a preferred embodiment, the equalizing circuit 11A further includes, as shown in fig. 3 and 6: the adjustment control circuit 112 is configured to receive the deviation signal A2 fed back by the central controller 2, and perform analog-to-digital conversion on the deviation signal A2 to obtain an adjustment signal.
Specifically, the adjustment control circuit 112 is implemented by an analog-to-digital converter ADC, which is configured to convert the deviation signal A2 into an adjustment signal, where the adjustment signal includes a31, a32, and a33.
As a preferred embodiment, wherein the central controller 2 comprises:
the average value operation circuit (not labeled in the figure) is used for receiving the electromagnetic interference sampling value and carrying out average processing on the electromagnetic interference sampling values of all the power supply loops to obtain an electromagnetic interference sampling average value;
and the second input end of each deviation calculating circuit is respectively connected with each equalizing circuit and is used for respectively calculating the deviation of each electromagnetic interference sampling value and the electromagnetic interference sampling average value to obtain a deviation signal.
Further, as shown in fig. 7, the average value operation circuit is implemented by two operational amplifiers. The positive input end of the first operational amplifier OP1 is grounded, a resistor R2 is connected between the negative input end and the output end of the first operational amplifier OP1, the negative input end is respectively connected with electromagnetic interference sampling values obtained by sampling four power supply loops through resistors, namely an electromagnetic interference sampling value A1 obtained by sampling a power supply loop 1A is connected through a resistor R11, an electromagnetic interference sampling value B1 obtained by sampling a power supply loop 1B is connected through a resistor R12, an electromagnetic interference sampling value C1 obtained by sampling a power supply loop 1C is connected through a resistor R13, and an electromagnetic interference sampling value D1 obtained by sampling a power supply loop 1D is connected through a resistor R14; the resistances of the resistors R11, R12, R13, R14 and the resistor R2 are equal, and the first operational amplifier OP1 is configured to perform addition processing on four sampling values;
the non-inverting input end of the second operational amplifier OP2 is grounded, the inverting input end is connected with the output end of the first operational amplifier OP1 through a resistor R3, and the inverting input end is also connected with the output end of the second operational amplifier OP through a resistor R4; the resistance of the resistor R3 and the resistor R4 form a multiple, which is related to the number of the electromagnetic interference sampling values, and in this embodiment, the resistance of R4 is one-fourth of the resistance of R3, and the second operational amplifier OP2 is used for performing an average processing on the sum of the four sampling values to obtain an electromagnetic interference sampling average value Xaver.
Further, the electromagnetic interference sampling average value Xaver is output to four deviation calculation circuits after being processed by a buffer buff, and the four deviation calculation circuits all adopt third operational amplifiers OP31-OP34 to realize subtraction operation. Taking a deviation calculating circuit for calculating Xaver-A1 as an example, the non-inverting input end of the third operational amplifier OP31 is connected with the output of the buffer buff through a resistor R71 and is grounded through a resistor R81; the inverting input end of the third operational amplifier OP31 is connected with the electromagnetic interference sampling value A1 through a resistor R51 and is connected with the output end of the third operational amplifier OP through a resistor R61, so that the subtraction operation of the Xaver-A1 is realized, and a deviation signal A2 of the electromagnetic interference sampling value A1 is obtained.
Except for the difference of the input electromagnetic interference sampling values, the four bias calculation circuits have the same circuit structure and are not described herein.
As a preferred embodiment, wherein the control circuit comprises:
an error amplifier 12A for comparing a reference voltage with the voltage feedback signal to obtain an error amplified signal;
a second comparator COMP4 for comparing the error amplified signal with the current sampling signal to generate a second comparison signal compout;
a driver 121 connected to the second comparator COMP4 and the equalizing circuit 11A, respectively, for generating a pulse modulation signal according to the second comparison signal and the adjustment signal.
Specifically, as shown in fig. 8, the second comparator COMP4 and the driver 121 together constitute the comparison driver 13A. Wherein the inverting input terminal of the second comparator COMP4 is connected to the output of the error amplifier 12A, and is configured to receive the error amplified signal; the non-inverting input end is used for receiving the current sampling signal, and processing the adjustment signal according to the difference value of the current sampling signal and the error amplification signal to obtain a pulse modulation signal.
Further, as shown in fig. 9, the driver 121 includes: the power supply device comprises a plurality of charging driving branches and a plurality of discharging driving branches, wherein the number of the charging driving branches is the same as that of the pull-up tubes in the working circuit, and the charging driving branches are respectively used for generating pulse modulation signals so as to control the on or off of the corresponding pull-up tubes. Further, each charging driving branch circuit comprises a NAND gate and a high-side switch driver which are connected in series, wherein the NAND gate is used for carrying out NAND logic processing on the modulation signal and the second comparison signal, and the high-side switch driver is used for outputting a pulse modulation signal for controlling the pull-up tube according to the NAND logic processing result. By way of example, and not limitation, the a31 signal and the second comparison signal compout in the modulation signal are subjected to nand logic processing, and then a pulse modulation signal for controlling the pull-up tube M11 is outputted according to the nand logic processing result. The generation logic of the pulse modulation signals of the other pull-up tubes M12 and M13 is the same, and will not be described again.
The number of the discharge driving branches is the same as that of the pull-down tubes in the working circuit, and the discharge driving branches are respectively used for generating pulse modulation signals so as to control the on or off of the corresponding pull-down tubes. Each discharge driving branch circuit comprises an AND gate and a low-side switch driver which are connected in series, wherein the AND gate is used for performing AND logic processing on the modulation signal and the second comparison signal, and the low-side switch driver is used for outputting a pulse modulation signal for controlling the pull-down tube according to an AND logic processing result. By way of example, and not limitation, the a31 signal and the second comparison signal compout in the modulation signal are subjected to nand logic processing, and then a pulse modulation signal for controlling the pull-down pipe M21 is outputted according to the nand logic processing result. The generation logic of the pulse modulation signals of the other pull-down tubes M22 and M23 is the same, and will not be described again.
As a preferred embodiment, as shown in fig. 2, the method further includes: a detection resistor Rense connected in series with the working circuit;
the current sampling signal is generated by a current detecting circuit 14A, and the current detecting circuit 14A is configured to detect the current flowing through the detecting resistor Rense and multiply the current by a feedback coefficient to generate the current sampling signal.
As a preferred embodiment, wherein, as shown in fig. 2, the working circuit comprises:
the charging control branch is connected between an input end and an intersection point;
the charge and discharge branch is connected between the junction and an output end;
the discharge control branch is connected between the junction and the grounding end;
the energy storage element is connected in series on the charge-discharge branch.
In a preferred embodiment, when the working circuit is in a charging mode, the charging control branch and the charging and discharging branch are conducted, and the discharging control branch is disconnected, so that the current input by the input end charges the energy storage element;
when the working circuit is in a discharging mode, the switching device group controls the discharging control branch and the charging and discharging branch to be conducted, and the charging control branch is disconnected, so that the energy storage element discharges to the output end.
As a preferred embodiment, wherein, as shown in fig. 10, the charging control branch includes: the source electrodes and the drain electrodes of the plurality of pull-up tubes (M11, M12, M13 … …) are connected in parallel, and the grid electrode of each pull-up tube is connected with a pulse modulation signal and is used for being controllably turned on or turned off under the action of the pulse modulation signal respectively so as to control the number of the turned-on pull-up tubes.
Specifically, in the charging mode, the charging control branch and the charging and discharging branch are conducted, and the discharging control branch is disconnected, in this embodiment, the number of the pull-up tubes conducted in the charging control branch is further controlled according to the deviation of the electromagnetic interference sampling value, so that the slope of the ripple voltage is changed, and the electromagnetic interference radiation of the multi-voltage system is homogenized.
Further, by way of example and not limitation, the parameters of the pull-up tubes in fig. 10 may be different, and the purpose of homogenizing electromagnetic interference radiation is achieved by controlling the pull-up tubes of different parameters to be turned on or off.
As a preferred embodiment, wherein, as shown in fig. 10, the discharge control branch includes: the source electrodes and the drain electrodes of the plurality of pull-down pipes (M21, M22 and M23 … …) are connected in parallel, and the grid electrode of each pull-down pipe is connected with a pulse modulation signal and is used for being controllably turned on or turned off under the action of the pulse modulation signal respectively so as to control the quantity of the turned-on pull-down pipes.
Specifically, in the discharging mode, the discharging control branch and the charging and discharging branch are conducted, and the charging control branch is disconnected, in this embodiment, the number of pull-down tubes conducted in the discharging control branch is further controlled according to the deviation of the electromagnetic interference sampling value, so that the slope of the ripple voltage is changed, and the electromagnetic interference radiation of the multi-voltage system is homogenized.
Further, by way of example and not limitation, the parameters of the drop down tubes in fig. 10 may be different, and the purpose of homogenizing electromagnetic interference radiation may be achieved by controlling the drop down tubes of different parameters to be turned on or off.
In the scheme, the problem that the performance of the system is affected due to the fact that the ripple voltage slopes of all power supply loops of the existing multi-power supply system are different and the phenomenon of non-uniform electromagnetic interference radiation is easy to occur is solved. In this embodiment, by sampling the electromagnetic interference of each power supply loop, comparing the electromagnetic interference average values of all the power supply loops according to the electromagnetic interference sampling values obtained by sampling, and performing deviation adjustment based on the difference between the electromagnetic interference sampling values of each power supply loop and the electromagnetic interference average values, the VDD ripple voltage slopes of each power supply loop are the same or similar, and as can be seen from the electromagnetic radiation effect diagram of fig. 11, the electromagnetic interference radiation of each power supply loop in the multi-power supply system is uniform, thereby achieving the purpose of improving the system performance.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and drawings, and are intended to be included within the scope of the present invention.
Claims (10)
1. An electromagnetic radiation equalizer, comprising: a plurality of power supply loops and a central controller connected with the plurality of power supply loops;
each power supply loop comprises:
the working circuit is provided with an energy storage element, and is controlled to alternately switch between a charging mode and a discharging mode under the action of a pulse modulation signal so as to output an output signal;
the equalization circuit is connected with the working circuit and used for sampling an electromagnetic interference sampling value of the working circuit and feeding the electromagnetic interference sampling value back to the central controller; receiving a deviation signal fed back by the central controller according to the electromagnetic interference sampling value, and outputting an adjustment signal according to the deviation signal;
the control circuit is connected with the working circuit and generates the pulse modulation signal under the action of the adjusting signal, the output signal and a current sampling signal sampled from the working circuit;
the central controller is used for respectively receiving the electromagnetic interference sampling values fed back by the equalization circuit and determining the deviation signals of the electromagnetic interference sampling values.
2. The electromagnetic radiation equalizer of claim 1, wherein the equalizer circuit comprises a sensing circuit comprising:
the power supply circuit comprises a plurality of first comparators, a first control circuit and a second control circuit, wherein each first comparator is used for comparing a power supply end voltage input by the power supply circuit with a reference signal to obtain a first comparison signal; the voltage values of the reference signals connected with the first comparators are different;
and the digital-to-analog converter is connected with the plurality of first comparators and is used for obtaining the electromagnetic interference sampling value according to the first comparison signals output by the plurality of first comparators.
3. The electromagnetic radiation equalizer of claim 1, wherein the equalizing circuit further comprises: and the adjusting control circuit is used for receiving the deviation signal fed back by the central controller and performing analog-to-digital conversion on the deviation signal to obtain the adjusting signal.
4. The electromagnetic radiation equalizer of claim 1, wherein the central controller comprises:
the average value operation circuit is used for receiving the electromagnetic interference sampling values and carrying out average processing on the electromagnetic interference sampling values of all the power supply loops to obtain an electromagnetic interference sampling average value;
and the first input end of each deviation calculation circuit is connected with the output end of the average value calculation circuit, and the second input end of each deviation calculation circuit is respectively connected with each equalization circuit and is used for respectively calculating the deviation of each electromagnetic interference sampling value and the average value of the electromagnetic interference sampling value to obtain a deviation signal.
5. The electromagnetic radiation equalizer of claim 1, wherein the control circuit comprises:
an error amplifier for comparing a reference voltage with the voltage feedback signal to obtain an error amplified signal;
a second comparator for comparing the error amplified signal with the current sampling signal to generate a second comparison signal;
and the driver is respectively connected with the second comparator and the equalizing circuit and is used for generating the pulse modulation signal according to the second comparison signal and the adjusting signal.
6. The electromagnetic radiation equalizer as set forth in claim 5, further comprising: a detection resistor connected in series with the working circuit;
the current sampling signal is generated by a current detection circuit, and the current detection circuit is used for detecting the current flowing through the detection resistor and generating the current sampling signal after multiplying a feedback coefficient.
7. The electromagnetic radiation equalizer of claim 1, wherein the operating circuit comprises:
the charging control branch is connected between an input end and an intersection point;
the charge and discharge branch is connected between the junction and an output end;
the discharge control branch is connected between the junction and the grounding end;
the energy storage element is connected in series on the charge-discharge branch.
8. The electromagnetic radiation equalizer of claim 7, wherein the charge control branch comprises: the source electrodes and the drain electrodes of the pull-up tubes are connected in parallel, and the grid electrode of each pull-up tube is connected with the pulse modulation signal and is used for being controlled to be turned on or off under the action of the pulse modulation signal respectively so as to control the quantity of the turned-on pull-up tubes.
9. The electromagnetic radiation equalizer of claim 7, wherein the discharge control leg comprises: the source electrodes and the drain electrodes of the pull-down tubes are connected in parallel, and the grid electrode of each pull-down tube is connected with the pulse modulation signal and is used for being controlled to be turned on or off under the action of the pulse modulation signal respectively so as to control the quantity of the turned-on pull-down tubes.
10. The electromagnetic radiation equalizer of claim 7, wherein when the operating circuit is in a charging mode, the charging control branch and the charging/discharging branch are turned on, the discharging control branch is turned off, and the current input from the input terminal charges the energy storage element;
when the working circuit is in a discharging mode, the switching device group controls the discharging control branch and the charging and discharging branch to be conducted, and the charging control branch is disconnected, so that the energy storage element discharges the output end.
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Denomination of invention: An electromagnetic radiation equalizer Granted publication date: 20230530 Pledgee: Changhe Branch of Hangzhou United Rural Commercial Bank Co.,Ltd. Pledgor: Hangzhou Shunyuan Microelectronics Co.,Ltd. Registration number: Y2024980001366 |