CN111130340A - Power supply device, electronic equipment and power supply method - Google Patents
Power supply device, electronic equipment and power supply method Download PDFInfo
- Publication number
- CN111130340A CN111130340A CN202010038933.5A CN202010038933A CN111130340A CN 111130340 A CN111130340 A CN 111130340A CN 202010038933 A CN202010038933 A CN 202010038933A CN 111130340 A CN111130340 A CN 111130340A
- Authority
- CN
- China
- Prior art keywords
- charging
- unit
- discharging
- impedance
- power supply
- 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.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
Abstract
The application discloses a power supply device, electronic equipment and a power supply method, which relate to the technical field of electronics, wherein the power supply device comprises an impedance unit and a charging and discharging unit, wherein the impedance unit is connected with the charging and discharging unit, and forms a charging loop with the charging and discharging unit during the charging period of the charging and discharging unit, and forms a discharging loop with the charging and discharging unit during the discharging period of the charging and discharging unit, wherein the impedance unit is connected into the charging loop with a first resistance value and is connected into the discharging loop with a second resistance value; and the charge and discharge unit is used for storing electric energy during charging, releasing the electric energy during discharging and outputting voltage to a load. Therefore, the impedance unit is added in the power supply device to control the charging and discharging time of the charging and discharging unit so as to reduce the electromagnetic interference caused by the voltage mutation of the charging and discharging unit and improve the radio frequency index performance.
Description
Technical Field
The present disclosure relates to the field of electronic technologies, and in particular, to a power supply device, an electronic apparatus, and a power supply method.
Background
With the development of display screen technology and touch technology, the requirements on touch chips are higher and higher. The touch effect of the touch chip is affected by various factors, and how to supply power to the touch chip belongs to one of the factors. Specifically, different power supply sources have different influences on power supply efficiency, touch sensitivity, and the like, and currently, in order to obtain higher power supply efficiency and touch sensitivity, a Charge Pump (Charge Pump) is mostly used for supplying power. However, the current power supply method still has the problem of electromagnetic Interference (EMI), and the radio frequency index performance is not high.
Disclosure of Invention
The embodiment of the application provides a power supply device, electronic equipment and a power supply method, which can reduce electromagnetic interference and improve radio frequency index performance.
In a first aspect, an embodiment of the present application provides a power supply apparatus, including: a resistance unit and a charge and discharge unit; the impedance unit is connected with the charge and discharge unit and used for forming a charge loop with the charge and discharge unit during the charge period of the charge and discharge unit and forming a discharge loop with the charge and discharge unit during the discharge period of the charge and discharge unit, wherein the impedance unit is connected into the charge loop with a first resistance value and connected into the discharge loop with a second resistance value; the charging and discharging unit is used for storing electric energy during charging, releasing the electric energy during discharging and outputting voltage to a load.
In a second aspect, an embodiment of the present application provides an electronic device, including: a housing, a load, an antenna and a power supply device as described in the first aspect above; the load, the antenna and the power supply device are arranged in the shell; the load is connected with the output end of the power supply device; the antenna is disposed adjacent to the power supply device.
In a third aspect, an embodiment of the present application provides a power supply method, which is applied to the power supply apparatus according to the first aspect, and the power supply method includes: during the charging period of the charging and discharging unit, the impedance unit and the charging and discharging unit form a charging loop, so that the charging and discharging unit releases electric energy and outputs voltage to a load; during the discharging period of the charging and discharging unit, the impedance unit and the charging and discharging unit form a discharging loop so that the charging and discharging unit releases electric energy and outputs voltage to a load; the impedance unit is connected to the charging loop through a first resistance value and connected to the discharging loop through a second resistance value.
The power supply device comprises an impedance unit and a charge and discharge unit, wherein the impedance unit is connected with the charge and discharge unit, and forms a charge loop with the charge and discharge unit during the charge period of the charge and discharge unit, and forms a discharge loop with the charge and discharge unit during the discharge period of the charge and discharge unit, wherein the impedance unit is connected to the charge loop with a first resistance value and connected to the discharge loop with a second resistance value, and the charge and discharge unit is used for storing electric energy during the charge period, releasing the electric energy during the discharge period and outputting voltage to a load. Therefore, the impedance unit is added in the power supply device to control the charging and discharging time of the charging and discharging unit so as to reduce the electromagnetic interference caused by the voltage mutation of the charging and discharging unit and improve the radio frequency index performance.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 shows a schematic diagram of a power supply apparatus provided by an embodiment of the present application;
FIG. 2 illustrates a schematic diagram of a power supply apparatus provided by another embodiment of the present application;
fig. 3 shows an operation timing chart of a power supply device provided in an embodiment of the present application;
FIG. 4 illustrates a schematic diagram of a power supply apparatus provided in accordance with yet another embodiment of the present application;
FIG. 5 illustrates a schematic diagram of a power supply apparatus provided in accordance with yet another embodiment of the present application;
FIG. 6 illustrates a schematic diagram of a power supply apparatus provided by yet another embodiment of the present application;
fig. 7 is a schematic diagram illustrating a circuit structure of a first impedance subunit according to an embodiment of the present application;
fig. 8 shows a schematic diagram of a power supply apparatus provided by yet another embodiment of the present application;
fig. 9 is a schematic circuit diagram illustrating a power supply device according to an embodiment of the present disclosure during charging;
fig. 10 is a schematic circuit diagram illustrating a power supply device provided by an embodiment of the present application during discharging;
FIG. 11 illustrates a jamming test waveform provided by an embodiment of the present application;
FIG. 12 illustrates a schematic diagram of an electronic device provided by an embodiment of the present application;
FIG. 13 illustrates a schematic diagram of an electronic device provided by another embodiment of the present application;
fig. 14 shows a method flowchart of a power supply method provided by an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
Before explaining the embodiments of the present application in detail, first, the concepts related to the embodiments of the present application are explained as follows:
charge Pump (Charge Pump): also known as a switched capacitor DC-DC converter (switchedca paci-torvoltageconverter), when compared to an inductance-based DC-DC switching power supply, is also known as an inductance-less DC-DC power converter. Compared with an inductance type switch DC-DC converter which adopts an inductance as an energy storage element, the charge pump has the following main advantages that: the efficiency is high; the volume is small; low quiescent current; the lowest working voltage is lower; low noise; low electromagnetic interference.
At present, a capacitive touch chip applied to an Active Matrix/Organic light emitting Diode (AMOLED) display screen needs to be powered by a charge pump, and the method has higher efficiency compared with an output mode of a Low Dropout Regulator (LDO) and can realize better touch sensitivity. However, as the switch of the charge pump is repeatedly switched, the frequency domain Fourier transform of the charge pump is expanded to cause the bottom noise in the whole frequency band to be raised, so that the radio frequency interference is caused, and the radio frequency OTA index is influenced.
Based on the above problem, the embodiments of the present application provide a power supply device, an electronic apparatus, and a power supply method. The following will be described in detail by way of specific examples.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a power supply device according to an embodiment of the present application, and as shown in fig. 1, the power supply device 10 includes: a resistance unit 200 and a charge and discharge unit 400.
The impedance unit 200 is connected to the charge/discharge unit 400, and forms a charge circuit with the charge/discharge unit 400 during a charge period of the charge/discharge unit 400, and forms a discharge circuit with the charge/discharge unit 400 during a discharge period of the charge/discharge unit 400. The impedance unit 200 is connected to the charging circuit with a first resistance value and connected to the discharging circuit with a second resistance value. The charge and discharge unit 400 stores electric energy during charging, discharges electric energy during discharging, and outputs a voltage to a load.
In some embodiments, the impedance unit 200 is used to connect with the charging and discharging unit 400 and provide a resistor in a loop formed with the charging and discharging unit 400. In some examples, the impedance unit 200 may include a resistor, a magnetic bead having a resistance characteristic, another element having a resistance characteristic, and the like, which is not limited in this embodiment.
Because the voltage of a capacitor plate in an original power supply circuit such as a charge pump is suddenly changed when the charge pump is charged and discharged, the output voltage is a pulse function when a frequency spectrum interference test is carried out, and the Fourier change frequency spectrum of the power supply circuit causes the bottom noise of the whole frequency domain to be raised, thereby causing radio frequency interference and influencing the OTA index performance. Therefore, the power supply device provided in this embodiment can increase the charging and discharging time of the charging and discharging unit 400 by adding the impedance unit 200 to the original charging pump circuit to form a charging loop with the charging and discharging unit 400 during the charging period and form a discharging loop with the charging and discharging unit 400 during the discharging period, so as to solve the problem of voltage jump of the charging and discharging unit 400, thereby suppressing the radio frequency interference from the power supply device 10 itself, weakening the radiation of the charging and discharging unit 400, reducing the interference to the antenna, and improving the OTA index performance.
In addition, when an original power supply circuit such as a charge pump is subjected to EMI protection, the whole machine shielding is mainly adopted, and a film is covered on the charge pump, for example, the current shielding mode adopts two films: the Mylar and the copper foil are insulated to block an interference propagation path, thereby reducing the influence on the radio frequency reception index. However, this method of reducing interference by shielding requires not only the addition of films such as insulating mylar and copper foil, but also the arrangement of station mounting accessories in the production or assembly of the equipment using the charge pump for power supply, resulting in an increase in production or assembly costs. And the EMI interference of the charge pump can not be completely eliminated through shielding, because in practical application, the charge pump can be used for supplying power to the touch chip, and because the charge pump is close to the antenna, interference signals can be leaked from a gap between the charge pump circuit and the antenna, and strong interference is caused to the antenna.
Because on terminal equipment, the antenna generally sets up at least one in terminal equipment's frame, casing internal portion, and it is lower that the ratio is occupied to preceding screen, when still having the frame on the casing at screen place, the line is walked to the accessible frame, still has the distance of frame between antenna and the charge pump this moment, but now along with the continuous increase that the ratio is occupied to the screen, the frame is more and more narrow and even comprehensive screen does not have the frame, charge pump and antenna are more and more near apart from this moment, the interference influence that the charge pump caused the antenna also will be big more. Therefore, it is necessary to reduce or even eliminate the interference of the charge pump to the antenna, and the shielding method adopted at present only cuts off the propagation path, and the lower edge slot radiation at the position of the charge pump close to the antenna may still leak the interference signal, resulting in strong interference to the antenna. Therefore, the power supply device 10 provided by this embodiment starts from the reason that the charge pump generates interference, that is, the interference is caused by the sudden change of the charging capacitor plate voltage, by improving the structure of the charge pump itself, the impedance unit 200 is added to be connected with the charging and discharging unit 400, so as to control the charging and discharging time of the charging and discharging unit 400 through the impedance unit 200, thereby converting the original pulse signal into a ramp signal, the radiation of the charging and discharging unit 400 itself is weakened from the source, the radio frequency interference of the power supply device 10 is reduced or even eliminated, not only can the interference caused to the antenna and the radiation of the lower edge gap near the antenna be avoided, thereby improving the radio frequency index performance and the OTA competitiveness, but also the material cost and the production and assembly cost required by the shielding mode can be.
Referring to fig. 2, fig. 2 is a schematic diagram of a power supply device according to another embodiment of the present application, and as shown in fig. 2, the power supply device 20 further includes: a switching unit 600.
In this embodiment, the power supply device 20 has an input end 12 and an output end 14, wherein the input end 12 is connected to the charging and discharging unit 400 for obtaining an input voltage and transmitting the input voltage to the charging and discharging unit 400, and the output end 14 is connected to the charging and discharging unit 400 during discharging for outputting a voltage to a load to supply power to the load.
The switching unit 600 is connected to the charging and discharging unit 400, and the switching unit 600 is configured to control the charging and discharging unit 400 to be connected between the input end 12 and the ground during charging so that the charging and discharging unit 400 is charged according to the input voltage; during the discharging period, the charging and discharging unit 400 is controlled to be connected between the input terminal 12 and the output terminal 14, so that the charging and discharging unit 400 discharges to the output terminal 14 to output the voltage to the load through the output terminal 14.
In some embodiments, the switching unit 600 may be a single-input dual-output circuit, and includes a control terminal, a first switching terminal and a second switching terminal, the control terminal is connected to the charging and discharging unit 400, the first switching terminal is connected to the ground terminal, the second switching terminal is connected to the output terminal 14, and the control terminal and the first switching terminal are turned on during charging to control the charging and discharging unit 400 to be connected between the input terminal 12 and the ground terminal, so that the charging and discharging unit 400 is charged according to the input voltage and the charging time; during the discharging period, the control terminal and the second switching terminal are turned on to control the charging and discharging unit 400 to be connected between the input terminal 12 and the output terminal 14, so that the charging and discharging unit 400 discharges to the output terminal 14 to output the voltage to the load through the output terminal 14. In some embodiments, the switching unit 600 may be a single-pole double-throw switch for conducting the charging/discharging unit 400 and the ground during charging and conducting the charging/discharging unit 400 and the output terminal 14 during discharging. In other embodiments, the switching unit 600 may also be another single-input dual-output circuit, which is not limited herein.
In some embodiments, the switching unit 600 is controlled by a control circuit, and the control circuit may be configured to control the switching unit 600 to switch a conducting circuit, for example, when receiving a first signal output by the control circuit to the switching unit 600, the charging/discharging unit 400 and the ground terminal may be conducted to control the charging/discharging unit 400 to be charged, and at this time, the power supply device 20 is in a charging period; when receiving the second signal outputted from the control circuit to the switching unit 600, the charging/discharging unit 400 and the output terminal 14 can be turned on to control the charging/discharging unit 400 to output the voltage to the load, and the power supply device 20 is in the discharging period.
In some embodiments, the control circuit may include a clock circuit, and the clock circuit may be configured to output the first signal and the second signal. In some examples, the clock circuit may be configured to output a square pulse signal, and the first signal may correspond to a high level and the second signal may correspond to a low level.
In some embodiments, during charging, one end of the charge/discharge unit 400 is connected to the input end 12, and the other end is connected to ground through the switching unit 400, so that the input end 12 is connected to the charge/discharge unit 400 to provide an input voltage for charging the charge/discharge unit 400. During discharging, one end of the charge and discharge unit 400 is connected to the input end 12, and the other end is connected to the output end 14 through the switching unit 400, so that the charge and discharge unit 400 outputs voltage to the load through the output end 14 to supply power to the load.
It should be noted that, in the present embodiment, the first resistance value of the impedance unit 200 connected to the charging circuit and the second resistance value of the impedance unit 200 connected to the discharging circuit are equivalent resistors in the circuit, so the impedance unit 200 is not limited to a connection manner. In some embodiments, the impedance unit 200 may be connected between the input terminal 12 and the charging and discharging unit 400, between the switching unit 600 and the charging and discharging unit 400, and between the switching unit 600 and the ground terminal.
In other embodiments, the impedance unit 200 may also include a plurality of impedance sub-units, and each of the impedance sub-units may be connected according to at least one of the connection manners described above, so as to access the charging circuit with a first resistance value during the charging period and access the resistance value of the discharging circuit with a second resistance value during the discharging period.
In some examples, the charging and discharging unit 400 is a capacitor, the capacitance value is denoted as C1, and the charging and discharging unit 400 and the impedance unit 200 are connected to form an RC charging and discharging circuit. The resistance of the impedance unit 200 connected to the charging loop is the first resistance R1 during the charging period, and the resistance of the impedance unit 200 connected to the discharging loop is the second resistance R2 during the discharging period. At this time, the charging time of the charging/discharging unit 400 can be obtained according to the product of the first resistance value R1 and the capacitance value C1 in the charging loop, for example, the charging time T1 can be the product of the first resistance value R1 and the capacitance value C1, i.e., T1 is R1 × C1; the discharge time is obtained by multiplying the second resistance value R2 by the capacitance value C1 of the discharge circuit. Therefore, the voltage change of the capacitive electrode plate can be changed from the previous pulse signal to the ramp signal.
In one example, referring to fig. 3, fig. 3 shows an operation timing diagram of a power supply apparatus. When the pulse signal from the time t0 to the time t3 corresponds to the voltage Vout across the capacitor when the impedance unit 200 is not applied before, the input voltage Vin is input from the time t 0. The ramp signal from the time tc1 to the time tc4 corresponds to the voltage Vc1 between the input voltage Vin and the two ends of the capacitor, where Vc1 is input from the time tc1
Wherein T is used for representing the charging and discharging time of the circuit, the charging period corresponds to the charging time T1, and the discharging period corresponds to the discharging time T2. The time interval from time tc1 to time tc2 is charging time T1, and the time interval from time tc3 to time tc4 is discharging time T2. As can be seen from fig. 3, the charging is completed from the moment t0 to the moment tc1 to the moment tc2, so that the problem of radio frequency interference caused by sudden change of the capacitor plate voltage is solved, and the radiation of the charging and discharging unit 400 is weakened by the power supply device 20 itself, so as to greatly reduce or even eliminate the radio frequency interference of the power supply device 20, and improve the OTA index performance.
In fig. 3, time t1 to time t2 represent system operating time. In order to meet the system operation requirement, the power supply device needs to ensure that the voltage of the system operation time reaches the operation voltage, so the charging and discharging unit 400 needs to complete the charging before the system operation time starts, i.e., before the time t 1. Therefore, in this embodiment, the original structure of the charge pump circuit is changed, the charging and discharging time is extended by adding the impedance unit 200, and in order to meet the system operation requirement, the charging end time tc2 of the charging and discharging unit 400 after being charged is required to be earlier than the start time T1 of the system operation time, so that the charging and discharging unit 400 can be charged before the system operation time starts by controlling at least one of the charging time T1 and the charging start time tc 1.
As can be seen from the charging time T in the RC charging circuit, the charging time T1 is determined by the resistance of the access circuit of the impedance unit 200 and the capacitance of the charging/discharging unit 200, and the larger the resistance and the larger the capacitance, the larger the charging time T1. It can be understood that the higher the charging time T1 is within a certain range, the greater the radiation of the charging and discharging unit 400 can be attenuated, and the radio frequency interference of the power supply device 20 itself can be reduced.
In some embodiments, if the charging time T1 is less than the difference between time T1 and time T0, only the charging time T1 may be changed such that the charging time T1 is less than the difference between time T1 and time T0, i.e., T1< T1-T0 is satisfied. As an embodiment, specifically, the first resistance R1 of the charging circuit can be accessed by controlling the impedance unit 200, when T1 is too large, for example, T1 is not less than T1-T0, the first resistance R1 can be decreased, and when T1 is too small, the first resistance R1 can be increased under the condition that T1< T1-T0, so as to improve the attenuation degree of radiation of the body of the charging and discharging unit 400.
In other embodiments, the charging start time tc1 may also be advanced to complete the charging of the charge and discharge unit 400 before the start time t1 of the system operation time. As an embodiment, the switching unit 600 may be controlled in advance to turn on the charging and discharging unit 400 and the ground terminal by increasing an advance amount to the clock signal corresponding to the system operating time to advance the phase, so as to start charging in advance, and ensure that charging is completed before the start time t1 of the system operating time. Therefore, the allowable charging time T1 is larger, and even when the charging time T1 is not less than the difference value between the time T1 and the time T0, the charging can be completed before the system working time, so that the attenuation degree of radiation to the body of the charging and discharging unit 400 can be further improved, the radio frequency interference of a power supply device is reduced or even eliminated, and the OTA index performance is improved.
In some embodiments, if the power supply device operates under a high-frequency signal, for example, when the signal frequency is between 700MHz and 960MHz, the charging time T1 does not need to be too large, and at this time, the resistance value of the access circuit of the impedance unit 200 does not need to be too large, so that the power supply device 20 provided in this embodiment can avoid current pulses caused by the instant rise of the voltage of the capacitor plate by increasing the impedance unit 200 to prolong the charging time, thereby avoiding the rise of the ground noise caused by the pulse signal in the whole frequency spectrum range. And a smaller resistance value can be selected for the radio frequency communication low frequency band of 700MHz-960MHz, so that the noise rise can be effectively eliminated, and the charging efficiency of the charging and discharging unit 400 is ensured.
Based on the above, when the capacitance value is not changed, the charging time T1 can be determined according to the first resistance R1, and if the charging time T1 of the charging/discharging unit 400 needs to be prolonged, the first resistance R1 of the impedance unit 200 accessing the charging circuit can be increased, and if the charging time T2 of the charging/discharging unit 400 needs to be shortened, the first resistance R1 of the impedance unit 200 accessing the charging circuit can be decreased.
In some embodiments, the resistance of the impedance unit 200 is not variable, and the charging and discharging time of the charging and discharging unit 400 can be controlled by selecting the impedance units 200 with different resistances.
In other embodiments, the resistance of the impedance unit 200 may be variable. As one approach, the impedance unit 200 may employ an adjustable resistor. Alternatively, the impedance unit 200 may employ a resistor circuit having a gating circuit to gate switches corresponding to different resistance values according to a received signal at the gating circuit to control the resistance value of the access circuit of the impedance unit 200. The detailed description of the embodiments can be seen in the following examples, which are not repeated herein. In this embodiment, the impedance unit 200 may also use other resistors or magnetic beads with resistance characteristics, and is not limited herein.
In some embodiments, the circuit in the subsequent stage to which the output terminal 14 is connected may further have a system internal resistance, which is recorded as Rs. At this time, the discharging time of the charging/discharging unit 400 can be determined by the second resistance value R2, the system internal resistance Rs and the capacitance value C1. For example, the discharge time T2 may be the product of the sum of the second resistance value R2 and the system internal resistance Rs and the capacitance value C1, i.e., T2 ═ (R2+ Rs) × C1. In some embodiments, in order to make the charging time T1 and the discharging time T2 consistent, the sum of the second resistance value R2 and the system internal resistance Rs may be equal to the first resistance value R1, that is, R1 ═ R2+ Rs.
In some embodiments, the switching unit 600 includes a first switching unit 610 and a second switching unit 620, specifically, as shown in fig. 4, fig. 4 shows a schematic diagram of a power supply device provided in another embodiment of the present application. In the power supply apparatus 30, the first switching unit 610 has three terminals, which are a first terminal 611, a second terminal 612 and a third terminal 613, respectively, specifically, the first terminal 611 is connected to the first connection terminal 410 of the charge and discharge unit 400, the second terminal 612 is connected to the input terminal 12, and the third terminal 613 is connected to the ground. The first switching unit 610 is used for connecting the first end 611 and the second end 612, or connecting the first end 611 and the third end 613.
The second switching unit 620 also has three terminals, namely a fourth terminal 624, a fifth terminal 625 and a sixth terminal 626, specifically, the fourth terminal 624 is connected to the second connection terminal 420 of the charge/discharge unit 400, the fifth terminal 625 is connected to the input terminal 12, and the sixth terminal 626 is connected to the output terminal 14. The second switching unit 620 is capable of conducting the fourth terminal 624 and the fifth terminal 625, or conducting the fourth terminal 624 and the sixth terminal 626.
In some embodiments, during the charging period, the first switching unit 610 is configured to conduct the first terminal 611 and the third terminal 613, so that the first connection terminal 410 of the charge and discharge unit 400 is connected to the ground terminal through the first switching unit 610, and the second switching unit 620 is configured to conduct the fourth terminal 624 and the fifth terminal 625, so that the second connection terminal 420 of the charge and discharge unit 400 is connected to the input terminal 12 through the second switching unit 620, so that the charge and discharge unit 400 can be charged according to the input voltage input by the input terminal 12.
During the discharging period, the first switching unit 610 is configured to conduct the first terminal 611 and the second terminal 612, so that the first connection terminal 410 of the charging and discharging unit 400 is connected to the input terminal 12, and the second switching unit 620 is configured to conduct the fourth terminal 624 and the sixth terminal 626, so that the second connection terminal 420 of the charging and discharging unit 400 is connected to the output terminal 14 through the second switching unit 620, so that the charging and discharging unit 400 can transfer the charges stored during the charging period to the output terminal 14, so as to output the voltage to the load through the output terminal 14, thereby implementing the power supply.
In some embodiments, the impedance unit 200 may be connected between the first terminal 611 of the first switching unit 610 and the first connection terminal 410 of the charge and discharge unit 400, and may also be connected between the second connection terminal 420 of the charge and discharge unit 400 and the fourth terminal 624 of the second switching unit 620, so as to switch in the circuit during both the charge period and the discharge period, so as to provide a first resistance value in the charge loop during the charge period and a second resistance value in the discharge loop during the discharge period. In the case that the resistance of the impedance unit 200 is not changed, the first resistance may be equal to the second resistance, and in the case that the first resistance is changed, the first resistance may not be equal to the second resistance. Optionally, the second resistance may be equal to the first resistance minus the resistance of the internal resistance of the system, so that the charging time and the discharging time of the charging and discharging unit 400 are consistent.
In other embodiments, the impedance unit 200 may include a plurality of sub-units. Specifically, referring to fig. 5, fig. 5 is a schematic diagram illustrating a power supply device according to still another embodiment of the present application. In the power supply apparatus 40, the impedance unit 200 may include a first impedance subunit 210 and a second impedance subunit 220.
The first impedance subunit 210 is connected between the first end 611 of the first switching unit 610 and the first connection end 410 of the charge/discharge unit 400, and the second impedance subunit 220 is connected between the third end 613 of the first switching unit 610 and the ground. Therefore, when the first switching unit 610 turns on the first end 611 and the second end 612, the resistance of the access circuit of the impedance unit 200 includes the resistance of the first impedance subunit 210; when the first switching unit 610 turns on the first end 611 and the third end 613, the resistance of the access circuit of the impedance unit 200 includes the resistances of the first impedance subunit 210 and the second impedance subunit 220.
The first impedance subunit 210 is configured to be connected in series with the charge and discharge unit 400 between the input terminal 12 and the output terminal 14 during a discharge period to form a discharge loop, so that a first resistance R1 of the discharge loop is determined by the first impedance subunit 610, and the charge and discharge unit 400 discharges to the output terminal 14 to output a voltage to a load through the output terminal 14.
The second impedance subunit 220 is connected in series with the first impedance subunit 210 and the charge and discharge unit 400 between the input end 12 and the ground during charging to form a charging loop, so that a second resistance R2 of the charging loop is determined by the first impedance subunit 210 and the second impedance subunit 220, and the charge and discharge unit is charged according to the input voltage.
In addition, in some embodiments, the power supply device may be applied to a touch chip. In some embodiments, the first impedance subunit 210 and the second single-group subunit 220 may be disposed outside the touch chip 700, so that the impedance unit 200 may be added to control the charging and discharging time of the charging and discharging unit 400 without changing the internal circuit of the touch chip 700.
In other embodiments, at least one of the first impedance subunit 210 and the second impedance subunit 220 may be disposed inside the touch chip 700. As an example, specifically, as shown in fig. 6, a schematic diagram of the impedance unit 200 in which the first impedance subunit 210 and the second impedance subunit 220 are both disposed inside the touch chip 700 is shown. Therefore, the space occupied by the power supply device on the equipment can be reduced, and the OTA index performance can be improved. In other examples, the first impedance subunit 210 or the second impedance subunit 220 may be disposed outside the touch chip 700.
In some embodiments, since the system internal resistance Rs exists in the circuit at the rear stage of the output terminal 14 during the discharging period, the system internal resistance Rs is also connected to the discharging loop, and the discharging time T2 is affected. Therefore, the first switch unit 610 can turn on the first terminal 611 and the second terminal 220 during the charging period, so that the second impedance subunit 220 can access the charging loop, and the first switch unit 610 turns on the first terminal 611 and the second terminal 612 during the discharging period, so that the second impedance subunit 220 does not access the discharging loop, and thus the system internal resistance Rs accessing the discharging loop during the discharging period can be counteracted by accessing the second impedance subunit 200 during the charging period.
Specifically, during the charging period, the first resistance value R1 of the charging circuit includes the sum of the resistance value R11 of the first impedance subunit 210 connected to the charging circuit and the resistance value R12 of the second impedance subunit 220 connected to the charging circuit, that is, R1 — R11+ R12; during the discharging period, the second resistance R2 of the discharging circuit includes the resistance R11 of the first impedance subunit 210 connected to the discharging circuit, that is, R2 is equal to R11. If the discharge circuit further includes the system internal resistance Rs, the total resistance of the discharge circuit actually includes the sum of the second resistance R2 and the system internal resistance Rs, that is, R '═ R2+ Rs ═ R11+ Rs, and since the charging time T1 ═ R1 × C1 ═ R11+ R12) × C1 and the discharging time T2 ═ R' × C1 ═ R2+ Rs) × C1 ═ R11+ Rs × C1, in order to make the charging time T1 and the discharging time T2 consistent, R12 ═ Rs, that is, the resistance R12 of the second impedance subunit connected to the charge circuit is equal to the system internal resistance Rs, so as to counteract the influence of the system internal resistance Rs on the discharging time of the charge and discharge unit 400.
In some embodiments, a filter capacitor may be connected between the second switching unit 620 and the output terminal 14 to ground, so that the high frequency signal can be filtered by the filter capacitor, and the system internal resistance Rs may be smaller, about several ohms, so that the resistance of the second impedance subunit 220 connected to the charging loop is also about several ohms, and thus, the second impedance subunit 200 may not only counteract the system internal resistance, but also may not introduce large extra power consumption. In addition, in some examples, the capacitance value of the filter capacitor is much smaller than that of the charge and discharge unit 400, and thus may be ignored when calculating the discharge time.
In some embodiments, to meet the system operation requirement, the charging and discharging unit 400 needs to complete charging before the system operation time begins, so that the voltage in the system operation time reaches the required voltage. Referring to fig. 3 again, in fig. 3, in order to meet the system operation requirement, the charging end time tc2 of the charging and discharging unit 400 is required to be earlier than the start time T1 of the system operation time, so that the charging and discharging unit 400 can complete charging before the system operation time starts by controlling at least one of the charging time T1 and the charging start time tc 1.
In some embodiments, the first sub-resistance value R11 of the first impedance subunit 210 accessing the circuit may be obtained based on T1 ═ R1 × C1 according to the charging time T1, where the first resistance value R1 ═ R11+ R12. The resistance of the first sub-resistance R11 is related to the operating frequency and the noise of the system, and the higher the operating frequency of the system is, the smaller the first sub-resistance R11 is; the first sub-resistance value R11 may be larger if the system requires a higher level of noise suppression.
In some specific examples, the system operating frequency is between 700MHz and 960MHz, and the requirement on the charging time T1 is not high, so that the first resistance value R1 is not high based on T1 ═ R1 × C1. In some embodiments, the second sub-resistance value R12 of the second impedance subunit 220 accessing the circuit is determined according to the system internal resistance Rs, and thus the first resistance value R1 ═ R11+ R12 in the charging circuit is determined by the first sub-resistance value R11, i.e., by the first impedance subunit 210. Therefore, according to the charging time T1, it is determined that the first impedance subunit 210 is connected to the first sub-resistance value R11 of the circuit, and the larger the charging time T1 is, the larger the first sub-resistance value R11 should be, and the smaller the charging time T1 is, the smaller the first sub-resistance value R11 should be.
In the power supply apparatus provided by this embodiment, the first switching unit 610 and the second switching unit 620 further control the resistance values of the impedance unit 200 connected to the circuit in different periods, including the first resistance value R1 connected to the charging loop in the charging period and the second resistance value R2 connected to the discharging loop in the discharging period, so that during the charging period, the first switching unit 610 is used to conduct the first end 611 and the third end 613, so as to connect the first connection end 410 of the charging and discharging unit 400 with the ground end, and the second switching unit 620 conducts the fourth end 624 and the fifth end 625, so that the charging and discharging unit 400 can be charged according to the input voltage; during the discharging period, the first switching unit 610 is configured to conduct the first terminal 611 and the second terminal 612, so that the first connection terminal 410 of the charge and discharge unit 400 is connected to the input terminal 12, and the second switching unit 620 is configured to conduct the fourth terminal 624 and the sixth terminal 626, so that the second connection terminal 420 of the charge and discharge unit 400 is connected to the output terminal 14, so that the charge and discharge unit 400 can output a voltage to a load through the output terminal 14 to supply power to the load. The impedance unit 200 includes a first impedance subunit 210 and a second impedance subunit 220, and the charging time T1 and the discharging time T2 of the charging and discharging unit 400 are controlled by the resistances of the access circuits of the first impedance subunit 210 and the second impedance subunit 220, so that the charging time T1 and the discharging time T2 of the charging and discharging unit 400 can be flexibly changed by the first impedance subunit 210 and the second impedance subunit 220, so as to balance the reduction of the radio frequency interference by increasing the charging time T1 with the additional power consumption, noise and the like introduced by the increase of the charging time T1. And in some embodiments, the second impedance subunit 220 is used for offsetting the system internal resistance, so that the charging time T1 and the discharging time T2 of the charging and discharging unit 400 are consistent.
In some embodiments, the first impedance subunit 210 may adopt a resistor circuit with a gating circuit, including at least one first resistor and a first gating circuit, and the first gating circuit is used to control the number of the first resistor access circuits so as to control the resistance value R11 of the access circuit of the first impedance subunit 210 to be variable. Specifically, referring to fig. 7, fig. 7 shows a circuit structure diagram of the first impedance subunit 210. As shown in fig. 7, the first gate circuit may include at least one first switch, the first impedance subunit 210 may include three first switches a1, a2, A3 and three first resistors R11-1, R11-2, R11-3, and has a first resistor selection terminal 211 and a first resistor connection terminal 212, and a resistance value R11 of the first impedance subunit 210 connected to the circuit is determined by a resistance value between the first resistor selection terminal 211 and the first resistor connection terminal 212. Wherein, the first switch can adopt a field effect transistor, a triode or other switches.
Specifically, three first resistors R11-1, R11-2 and R11-3 are connected in series, one ends of three first switches a1, a2 and A3 are all connected to the selection end 211 of the first impedance subunit 210, the first switch a1 is connected between the first resistor selection end 211 and the first resistor connection end 212, the other end of the first switch a2 is connected between the first resistors R11-1 and R11-2, and the other end of the switch A3 is connected between the first resistors R11-2 and R11-3. Therefore, when only the first switch a1 is turned on, the resistance R11 of the first impedance subunit 210 connected to the circuit is 0; when only the first switch a2 is turned on, the resistance R11 of the first impedance subunit 210 connected to the circuit is equal to the resistance R11-1; when only the first switch A3 is turned on, the resistance R11 of the first impedance subunit 210 connected into the circuit is equal to the sum of the resistances of R11-1 and R11-2; when none of the three first switches is conductive, the resistance value R11 of the first impedance subunit 210 connected into the circuit is equal to the sum of the resistance values of R11-1, R11-2 and R11-3. Thus, the resistance value of the first impedance subunit 210 can be controlled to change by controlling the closing of the first switch.
It should be noted that fig. 7 is only a schematic diagram of the first impedance subunit 210, in other embodiments, the first impedance subunit 210 may further include more switches or fewer switches, and the connection of the first resistor is not limited to the above connection manner, and may also be a network connection, which is not limited in this embodiment. In some embodiments, the second impedance subunit 220 may have a similar circuit structure to that of the first impedance subunit 210, and is not described herein again.
In addition, referring to fig. 8 in some embodiments, fig. 8 shows a schematic diagram of a power supply apparatus according to yet another embodiment of the present application, wherein the first impedance subunit 210 may also be connected between the fourth terminal 624 of the second switching unit 620 and the second connection terminal 420 of the charge and discharge unit 400, and the second impedance subunit 220 is connected between the third terminal 613 of the first switching unit 610 and the ground terminal. The method principle of the power supply device 60 shown in fig. 8 is substantially the same as that of the power supply device 40 shown in fig. 5 or the power supply device 50 shown in fig. 6, and the description thereof is omitted.
Referring to fig. 9 and 10, fig. 9 and 10 respectively show circuit structure diagrams of a power supply device at different times, and specifically, fig. 9 shows a circuit structure diagram of a power supply device during charging, and fig. 10 shows a circuit structure diagram of a power supply device during discharging.
As shown in fig. 9 and 10, the charging and discharging unit 400 may correspond to the charging capacitor C1, the first impedance subunit 210 may correspond to the resistor R11, the second impedance subunit 220 may correspond to the resistor R12, the first switching unit 610 may correspond to the switch S1, the second switching unit 620 may correspond to the switch S2, the input end 12 of the power supply device 70 corresponds to the VIN terminal, and the output end 14 corresponds to the VOUT terminal. In some embodiments, a first filter capacitor CIN may be connected between the VIN terminal and the switch S1 to ground, a second filter capacitor COUT may be connected between the switch S2 and the output terminal VOUT terminal to ground, and the first filter capacitor CIN and the second filter capacitor COUT are used for filtering out harmonics.
As shown in fig. 9, the switch S1 is turned on between the resistor R11 and the resistor R12, and the switch S2 is turned on between the VIN terminal and the charging capacitor C1, so that the charging capacitor C1 can be charged by the input voltage input from the VIN terminal, the power supply device 70 is in the charging period, and the charging time T1 is (R11+ R12) × C1.
As shown in fig. 10, the switch S1 is turned on between the terminal VIN and the resistor R1, and the switch S2 is turned on between the terminals C1 and VOUT, so that the charging capacitor C1 can discharge and output voltage to the next system (load) through the terminal VOUT. In some examples, the system internal resistance Rs exists in the later stage system, and in addition, since the capacitance value of the second filter capacitor COUT is much smaller than that of the charging capacitor C1, the discharging time T2 ≈ R (R11+ Rs) × C1 of the charging capacitor C1 at this time.
In a specific example, the impedance unit 200 is a resistor or a magnetic bead with a resistance characteristic, and an interference test waveform diagram can be obtained by performing experiments on the suppression situation of the power supply device provided in the embodiment of the present application on the radio frequency interference, as shown in fig. 11, specifically, a curve a is a first interference test value when the impedance unit 200 is not added, and an average value is about-35 dBm, and a curve B is a second interference test value when the first impedance subunit 210 and the second electronic subunit 220 are added, and an average value is about-45 dBm. Therefore, compared with the first interference test value and the second interference test paper, the noise suppression of at least 10dBm can be realized, and the noise suppression is basically equal to the environmental noise, so that the power supply device provided by the embodiment of the application can suppress the generation of interference signals from the source, and can save the material cost and the production cost without additional shielding measures.
Referring to fig. 12, an electronic device 80 is further provided in the embodiment of the present application, where the electronic device 80 may include a housing 810, a load 820, and a power supply device 830 as shown in the foregoing embodiment. The power supply device 830 may be any one of the power supply devices 10 to 70 provided in the above embodiments, and is not limited herein.
In this embodiment, the electronic device 80 includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a desktop computer, a wearable smart device, and the like.
The load 820 and the power supply device 830 are disposed in the housing 810, and the load 820 is connected to an output terminal of the power supply device 830. The power supply device 830 may supply power to the load 820 through an output terminal.
In some embodiments, the electronic device 80 further includes an antenna 840, and referring to fig. 13, the power supply device 830 is disposed adjacent to the antenna 840. Therefore, if the power supply device 830 generates radio frequency interference, the antenna will be greatly interfered, and the OTA index performance is affected, and the power supply device 830 provided by the embodiment of the present application weakens the radiation of the charging and discharging unit 400, reduces or even avoids the radio frequency interference of the power supply device 830 and the gap radiation near the antenna 840, improves the radio frequency index performance and the OTA competitiveness, and can also solve the problem that the current comprehensive screen cannot be wired through the screen frame to reduce the radio frequency interference to the antenna, and simultaneously, compared with the current shielding mode, the material cost and the production and assembly cost of shielding by using films such as insulating mylar, shielding copper foil and the like can be reduced.
The antenna 840 may be disposed on a Circuit board inside the housing 810, for example, on a Flexible Printed Circuit (FPC) on a frame of the housing 810 as shown in fig. 13, or on another frame of the housing 810, or inside the housing 810 on a non-frame, which is not limited herein.
Those skilled in the art will appreciate that the configurations shown in fig. 12 and 13 are merely illustrative and do not constitute a limitation of the electronic device 80, and may include more or fewer components than those shown, or combine certain components, or employ a different arrangement of components.
Referring to fig. 14, an embodiment of the present application further provides a power supply method, where the method includes: s110 to S120.
S110: during the charging period of the charging and discharging unit, the impedance unit and the charging and discharging unit form a charging loop so that the charging and discharging unit stores electric energy.
S120: during the discharging period of the charge and discharge unit, the impedance unit and the charge and discharge unit form a discharging loop, so that the charge and discharge unit releases electric energy and outputs voltage to a load.
The impedance unit is connected to the charging circuit with a first resistance value and connected to the discharging circuit with a second resistance value.
The foregoing steps may refer to the foregoing embodiments, and in addition, the foregoing method may be applied to the foregoing power supply device and electronic equipment, that is, the method may use the foregoing power supply device and electronic equipment as execution carriers, and achieve the beneficial effects described in the foregoing embodiments, and in particular, refer to the foregoing embodiments.
In addition, the power supply method provided by this embodiment can be applied to the power supply device and the electronic device, and achieve the beneficial effects described in the foregoing embodiments, and in particular, refer to the foregoing embodiments.
Specifically, the main executing body of the power supply method may be a processor, and the processor may be disposed in the housing of the electronic device, and connected to the power supply device, and configured to control the impedance unit to access the charging loop with a first resistance value during charging, and to access the discharging loop with a second resistance value during discharging.
In some embodiments, a processor may include one or more processing cores. The processor, using the various interfaces and lines to connect the various parts throughout the electronic device, performs various functions of the electronic device and processes data by executing or executing instructions, programs, code sets, or instruction sets stored in memory, and invoking data stored in memory. Alternatively, the processor may be implemented in hardware using at least one of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA). The processor may integrate one or more of a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), a modem, and the like. Wherein, the CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for rendering and drawing display content; the modem is used to handle wireless communications. It is to be understood that the modem may be implemented by a communication chip without being integrated into the processor.
In other embodiments, the processor may also be a Micro Control Unit (MCU).
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A power supply device is characterized by comprising an impedance unit and a charging and discharging unit;
the impedance unit is connected with the charge and discharge unit and used for forming a charge loop with the charge and discharge unit during the charge period of the charge and discharge unit and forming a discharge loop with the charge and discharge unit during the discharge period of the charge and discharge unit, wherein the impedance unit is connected into the charge loop with a first resistance value and connected into the discharge loop with a second resistance value;
the charging and discharging unit is used for storing electric energy during charging, releasing the electric energy during discharging and outputting voltage to a load.
2. The power supply device according to claim 1, wherein the power supply device has an input terminal connected to the charge and discharge unit for obtaining an input voltage and transmitting the input voltage to the charge and discharge unit, and an output terminal connected to the charge and discharge unit during discharging for outputting a voltage to the load; the power supply device further comprises a switching unit connected with the charging and discharging unit, and the switching unit is used for:
during charging, controlling the charging and discharging unit to be connected between the input end and the ground end so as to charge the charging and discharging unit according to the input voltage;
and during the discharging period, controlling the charging and discharging unit to be connected between the input end and the output end so that the charging and discharging unit discharges to the output end to output voltage to the load through the output end.
3. The power supply device according to claim 2, wherein the switching unit includes a first switching unit and a second switching unit;
the first end of the first switching unit is connected with the first connecting end of the charge and discharge unit, the second end of the first switching unit is connected with the input end, and the third end of the first switching unit is connected with the ground end;
the fourth end of the second switching unit is connected with the second connecting end of the charge and discharge unit, the fifth end is connected with the input end, and the sixth end is connected with the output end;
during charging, the first switching unit is used for conducting the first end and the third end so as to connect the first connection end of the charging and discharging unit with a ground end; the second switching unit is used for conducting the fourth end and the fifth end so as to connect the second connection end of the charge and discharge unit with the input end;
during discharging, the first switching unit is used for conducting the first end and the second end so as to connect the first connection end of the charging and discharging unit with the input end; the second switching unit is configured to connect the fourth terminal and the sixth terminal, so that the second connection end of the charge and discharge unit is connected to the output end.
4. A power supply device according to any one of claims 1-3, characterized in that the impedance unit comprises a first impedance subunit and a second impedance subunit;
the first impedance subunit is used for being connected in series with the charge and discharge unit between the input end and the output end during a discharge period to form the discharge loop, so that a first resistance value of the discharge loop is determined by the first impedance subunit, and the charge and discharge unit discharges to the output end to output voltage to the load through the output end;
the second impedance subunit is configured to, during charging, be connected in series between the input terminal and a ground terminal with the first impedance subunit and the charge and discharge unit to form the charging loop, so that a second resistance value of the charging loop is determined by the first impedance subunit and the second impedance subunit, and the charge and discharge unit performs charging according to the input voltage.
5. The power supply device according to claim 4, wherein the first impedance subunit is connected between the first terminal of the first switching unit and the first connection terminal of the charge/discharge unit, and the second impedance subunit is connected between the third terminal of the first switching unit and the ground terminal.
6. The power supply device according to claim 4, wherein the first impedance subunit is connected between the fourth terminal of the second switching unit and the second connection terminal of the charge/discharge unit, and the second impedance subunit is connected between the third terminal of the first switching unit and a ground terminal.
7. The power supply device according to any one of claims 4 to 6, wherein the power supply device is applied to a touch chip, and at least one of the first impedance subunit and the second impedance subunit is disposed inside the touch chip.
8. A supply device according to any one of claims 4-6, characterized in that the resistance of the first impedance subunit is variable and the resistance of the second impedance subunit is variable.
9. An electronic device comprising a housing, a load, an antenna, and the power supply apparatus of any one of claims 1-8;
the load, the antenna and the power supply device are arranged in the shell;
the load is connected with the output end of the power supply device;
the antenna is disposed adjacent to the power supply device.
10. A power supply method applied to a power supply apparatus according to any one of claims 1 to 8, the method comprising:
during the charging period of the charging and discharging unit, the impedance unit and the charging and discharging unit form a charging loop so that the charging and discharging unit stores electric energy;
during the discharging period of the charging and discharging unit, the impedance unit and the charging and discharging unit form a discharging loop so that the charging and discharging unit releases electric energy and outputs voltage to a load;
the impedance unit is connected to the charging loop through a first resistance value and connected to the discharging loop through a second resistance value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010038933.5A CN111130340B (en) | 2020-01-14 | 2020-01-14 | Power supply device, electronic equipment and power supply method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010038933.5A CN111130340B (en) | 2020-01-14 | 2020-01-14 | Power supply device, electronic equipment and power supply method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111130340A true CN111130340A (en) | 2020-05-08 |
| CN111130340B CN111130340B (en) | 2021-08-17 |
Family
ID=70490657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010038933.5A Active CN111130340B (en) | 2020-01-14 | 2020-01-14 | Power supply device, electronic equipment and power supply method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111130340B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111711255A (en) * | 2020-07-20 | 2020-09-25 | 上海英内物联网科技股份有限公司 | Method for reducing energy consumption of semi-active RFID equipment |
| CN113470720A (en) * | 2021-06-29 | 2021-10-01 | 长江存储科技有限责任公司 | Discharge circuit and discharge control circuit system of memory |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020008499A1 (en) * | 2000-06-13 | 2002-01-24 | Henry George C. | Charge pump regulator with load current control |
| US6411531B1 (en) * | 2000-11-21 | 2002-06-25 | Linear Technology Corporation | Charge pump DC/DC converters with reduced input noise |
| US20020153869A1 (en) * | 2001-04-24 | 2002-10-24 | Satoru Kurotsu | Power supply device |
| US20050110559A1 (en) * | 2003-11-25 | 2005-05-26 | Synqor, Inc. | Charge pump with reduced noise |
| CN1719704A (en) * | 2004-07-08 | 2006-01-11 | 沛亨半导体股份有限公司 | Charge pump dc/dc converter with constant-frequency operation |
| JP2007104823A (en) * | 2005-10-05 | 2007-04-19 | Asahi Kasei Microsystems Kk | Charge pump circuit |
| CN101552552A (en) * | 2008-04-02 | 2009-10-07 | 联咏科技股份有限公司 | Dynamic feedback stabilized charge pump device |
| US20140084890A1 (en) * | 2012-09-21 | 2014-03-27 | Nxp B.V. | Output ripple voltage control for a capacitive dc/dc converter |
-
2020
- 2020-01-14 CN CN202010038933.5A patent/CN111130340B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020008499A1 (en) * | 2000-06-13 | 2002-01-24 | Henry George C. | Charge pump regulator with load current control |
| US6411531B1 (en) * | 2000-11-21 | 2002-06-25 | Linear Technology Corporation | Charge pump DC/DC converters with reduced input noise |
| US20020153869A1 (en) * | 2001-04-24 | 2002-10-24 | Satoru Kurotsu | Power supply device |
| US20050110559A1 (en) * | 2003-11-25 | 2005-05-26 | Synqor, Inc. | Charge pump with reduced noise |
| CN1719704A (en) * | 2004-07-08 | 2006-01-11 | 沛亨半导体股份有限公司 | Charge pump dc/dc converter with constant-frequency operation |
| JP2007104823A (en) * | 2005-10-05 | 2007-04-19 | Asahi Kasei Microsystems Kk | Charge pump circuit |
| CN101552552A (en) * | 2008-04-02 | 2009-10-07 | 联咏科技股份有限公司 | Dynamic feedback stabilized charge pump device |
| US20140084890A1 (en) * | 2012-09-21 | 2014-03-27 | Nxp B.V. | Output ripple voltage control for a capacitive dc/dc converter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111711255A (en) * | 2020-07-20 | 2020-09-25 | 上海英内物联网科技股份有限公司 | Method for reducing energy consumption of semi-active RFID equipment |
| CN113470720A (en) * | 2021-06-29 | 2021-10-01 | 长江存储科技有限责任公司 | Discharge circuit and discharge control circuit system of memory |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111130340B (en) | 2021-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102590867B (en) | Mobile terminal | |
| CN111130340B (en) | Power supply device, electronic equipment and power supply method | |
| CN105070711B (en) | Electromagnetism interference method and apparatus | |
| CN106550073B (en) | Equipment component applied to mobile terminal and mobile terminal | |
| CN109193123B (en) | Electronic device, antenna radiator control method, and storage medium | |
| CN210092344U (en) | Antenna assembly and electronic equipment | |
| US20200021029A1 (en) | Communication device | |
| CN110429394B (en) | Antenna module and mobile terminal | |
| US20220238998A1 (en) | Antenna structure, radio frequency circuit, and electric device | |
| CN208433511U (en) | Antenna module and electronic equipment | |
| CN108232407B (en) | LTE antenna based on comprehensive screen metal frame | |
| US20200411955A1 (en) | Antenna assembly and electronic device using same | |
| US20170041035A1 (en) | Sensor assembly | |
| CN103337687A (en) | An antenna apparatus of a mobile terminal | |
| US20190341701A1 (en) | Circuit and method for adjusting frequency band of antenna, and electronic device | |
| CN103222356B (en) | Perform the method and the corresponding intrument that chip level reduce electromagnetic interference | |
| CN215581155U (en) | Antenna radio frequency circuit, communication module and terminal equipment | |
| KR101136189B1 (en) | Electro-magnetic shielding apparatus for mobile phone | |
| CN201781481U (en) | Mobile terminal and control device of antenna circuit | |
| CN105490697A (en) | Electronic equipment and information processing method | |
| CN205725776U (en) | A kind of terminal and FM vacation platform thereof eliminate circuit | |
| CN110459860A (en) | Shell component and electronic equipment afterwards | |
| CN101677421B (en) | Loudspeaker and mobile communication terminal with the loudspeaker | |
| CN112737630B (en) | Antenna circuit and electronic equipment | |
| CN215527939U (en) | Signal isolation device, antenna and electronic equipment |
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 |