CN101378570A - Signal processing method, signal processing circuit and electronic device - Google Patents
Signal processing method, signal processing circuit and electronic device Download PDFInfo
- Publication number
- CN101378570A CN101378570A CNA2008102162965A CN200810216296A CN101378570A CN 101378570 A CN101378570 A CN 101378570A CN A2008102162965 A CNA2008102162965 A CN A2008102162965A CN 200810216296 A CN200810216296 A CN 200810216296A CN 101378570 A CN101378570 A CN 101378570A
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency
- fixed frequency
- signal processing
- processing circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The implementation method of the invention provides a signal processing method and a signal processing circuit of an electronic device, and the electronic device using the signal processing circuit. The method comprises the steps: frequency jitter process is carried out to an input signal of a fixed frequency; modulation is carried out to the signal after frequency jitter process by a feed-back amplification signal to obtain a signal after feed-back sampling amplification; and wave-form control process is carried out to the signal after feed-back sampling amplification so as to output a control signal. The technical proposal provided by the implementation method can reduce disturbance to other devices by the frequency jitter technology.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to signal processing method, signal processing circuit in a kind of electronic equipment, and the electronic equipment that uses this signal processing circuit.
Background technology
Along with the development of mobile communication technology, the volume of handheld device is more and more littler, and power density is increasing.Accordingly, also more and more higher to the requirement of power management.Be understandable that the notion of handheld device can comprise MS (Mobile Station, travelling carriage), UE (User Equipment, subscriber equipment), can also comprise data card, or other has the other-end product of wireless communication function.
At present, the power module that handheld device is used is when use is high-power, general PWM (the Pulse-Width Modulation that adopts, pulse-width modulation) DC-DC (DC/DC) translation circuit, the benefit of sort circuit is: control mode is simple, the efficient height in addition, can also reduce the size of power inductance and electric capacity by the mode that increases switching frequency.Wherein, PWM is a kind of mode of pulse-width modulation, by changing duty ratio (duty ratio is meant the ratio of the time that high-low level is shared) to change power supply output.And the DC/DC conversion refers to direct voltage to the conversion between the direct voltage.
In addition, other small-sized electronic equipment for consumption also may adopt above-mentioned power module.
In realizing process of the present invention, the inventor finds, at least there is following problem in the prior art: the DC/DC translation circuit of PWM that power module adopts, owing to use fixing switching frequency, thereby can produce the switching noise of fixed frequency, and fixing switching noise can produce the Harmonic Interference of single-frequency.
The interference that harmonic wave caused of single-frequency is concentrated on some Frequency points, performance index is caused to seriously influence on this Frequency point.If this in the working band scope of equipment, will cause very big interference to Sensitive Apparatus.
In addition, along with the development of technology, device can be more and more intensive, and like this, switching frequency is high more, and the interference that is caused will be strong more.
Summary of the invention
In view of above-mentioned existing in prior technology problem, embodiment of the present invention provides signal processing method, the signal processing circuit in a kind of electronic equipment, and the electronic equipment that uses this signal processing circuit, by utilizing the frequency jitter technology, the feasible interference that can reduce to other equipment.
One embodiment of the present of invention provide the signal processing method in a kind of electronic equipment, are applied to adopt in the power supply of DC/DC converter of PWM modulation system, and this method comprises: the input signal of fixed frequency is carried out frequency jitter handle; Modulate by the signal that feeds back after amplifying signal is handled frequency jitter, form signal after feed-back sampling amplification; Signal after feed-back sampling amplification is carried out Waveform Control handle, the output control signal.
An alternative embodiment of the invention provides the signal processing circuit in a kind of electronic equipment, is applied to adopt in the power supply of DC/DC converter of PWM modulation system, and this treatment circuit comprises: the fixed frequency generation module is used to produce the input signal of fixed frequency; The frequency jitter module is used for that the signal that the fixed frequency generation module produces is carried out frequency jitter and handles; The signal feedback amplification module is used for producing the feedback amplifying signal, and this feedback amplifying signal is used for the signal of handling through frequency jitter is modulated; Output control waveform generation module is used to receive the signal through the modulation of signal feedback amplifying signal, this signal is carried out Waveform Control handle, the output control signal.
Another embodiment of the present invention provides a kind of electronic equipment, comprises aforesaid signal processing circuit.
By the above-mentioned technical scheme that provides as can be seen, in the technical scheme of the embodiment of the invention, by utilizing the frequency jitter technology, make at random the shake in the scope of setting of the switching frequency of DC/DC converter, like this, just the noise that switch is brought is distributed in the whole frequency range, rather than only concentrates on the point, has reduced the interference to other equipment.
Description of drawings
Fig. 1 is a kind of schematic diagram that adopts the DC/DC converter of PWM modulating mode;
The schematic diagram of the signal processing circuit of a kind of power module with frequency jitter that Fig. 2 provides for the embodiment of the invention;
The schematic diagram of the signal processing circuit of the power module of the another kind band frequency jitter that Fig. 3 provides for the embodiment of the invention;
The schematic diagram of the signal processing circuit of the power module of another band frequency jitter that Fig. 4 provides for the embodiment of the invention;
The oscillogram of various signals in the signal processing that Fig. 5 provides for the embodiment of the invention;
The schematic flow sheet of the signal processing method that Fig. 6 provides for the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
In the communications field, usually hf rectifier is called primary power source, and DC-DC (DC/DC) converter is called secondary power supply.The DC/DC converter is variable direct voltage with a fixing dc voltage conversion, and this technology is widely used.But the Switching Power Supply of PWM pattern can produce the switching signal of fixed frequency, that is to say the High-frequency Interference that can produce fixed frequency.The switching signal of fixed frequency can produce the high order harmonic component of some fixed frequencies, if high order harmonic component in the normal working frequency scope of electronic product, so just may cause bigger interference to Sensitive Apparatus.And device is intensive more, switching frequency is high more, and interference will be strong more.The present scheme that adopts, such as increase power supply and easily disturbed circuit distance or add the mode of shielding, along with equipment is more and more littler, more and more be difficult to meet design requirement.
Fig. 1 is a kind of schematic diagram of DC/DC converter of the PWM of employing modulating mode, realizes the DC/DC conversion by the switch of switching tube and the energy storage of energy storage inductor.
As shown in Figure 1, this schematic diagram is the schematic diagram of the BUCK buck converter of the stream that shakes synchronously, under the work of PWM pattern, the fixed frequency generation module 101 of the chip internal of this BUCK buck converter can produce the control signal of fixed frequency, and this control signal can be a triangular signal.After the feedback signal stack of this control signal and feedback sample error amplification module 102, after PWM logic control driver module 103 is handled, become the identical square-wave signal of frequency, as metal oxide semiconductor field effect tube (MOSFET, metal-oxide-semiconductor field-effect) control signal (or claiming drive signal), among the figure, MOSFET is that example describes with Q1 and Q2.Because two MOSFET of chip take turns conducting, can produce square-wave signal in the energy storage inductor front, this square-wave signal has big electric current and voltage jumpy, so it is exactly the main interference source of switching power circuit.
Embodiment one:
For the power supply of the DC/DC converter that solves present employing PWM modulation system disturbs too strong problem, the embodiment of the invention provides a kind of signal processing circuit of the power module with frequency jitter, this signal processing circuit is the improvement of being done on the BUCK buck converter basis of the stream that shakes synchronously, wherein, the BUCK buck converter is a kind of DC/DC buck converter.Fig. 2 is the schematic diagram of BUCK buck converter, wherein, is the schematic diagram of the signal processing circuit of this converter in the frame of broken lines.
As shown in Figure 2, in the technical scheme that the embodiment of the invention provides, by increasing sine wave signal generation module (or claiming sine wave signal to produce circuit), export a sinewave modulation signal, the fixed frequency signal that produces with fixed frequency generation module 201 superposes, after the feedback signal stack through feedback sample error amplification module 203, what obtain will be a control waveform along with sinusoidal wave conversion frequency again.Like this, handle the control square-wave signal of back output again through PWM logic control driver module, its frequency also can change thereupon.
It seems that externally switching frequency just changes in certain scope, the high order harmonic component of Chan Shenging naturally just can be on same point like this, but is distributed in certain frequency range.
The technical scheme that present embodiment provides makes at random the shake in the scope of setting of the switching frequency of BUCK buck converter power supplies.Like this, just the noise that switch is brought is distributed in the whole frequency range, rather than only concentrates on the point, we can say the spread spectrum of having realized noise.Because the peak amplitude of spread spectrum noise is much lower, so, can reduce interference greatly, the radio-frequency (RF) index that helps the handheld device of small size, high power density is improved.
Embodiment two:
For the power supply of the DC/DC converter that solves present PWM modulation system disturbs too strong problem, the embodiment of the invention provides the signal processing circuit of the power module of another band frequency jitter, this signal processing circuit is the improvement of being done on a BOOST booster converter basis, wherein, the BOOST booster converter is a kind of DC/DC booster converter.Fig. 3 is the schematic diagram of BOOST buck converter, wherein, is the schematic diagram of the signal processing circuit of this converter in the frame of broken lines.
Compare with a last embodiment, the difference of BOOST and BUCK converter is the different of topological structure, and just the same about the principle of frequency jitter (or claiming frequency jitter), is briefly described as follows:
As shown in Figure 3, in the technical scheme that this embodiment provides, by a sine wave signal generation module (or claiming sine wave signal to produce circuit) 302, export a sinewave modulation signal, the fixed frequency signal that produces with fixed frequency generation module 301 superposes, like this, output triangle wave frequency just changes, and the frequency of Shu Chu square wave control signal also just changes at last.The content of other modules please refer to the description of corresponding module among the embodiment.
The technical scheme that present embodiment provides makes at random the shake in the scope of setting of the switching frequency of BOOST booster converter power supply.Like this, just the noise that switch is brought is distributed in the whole frequency range, rather than only concentrates on the point, we can say the spread spectrum of having realized noise.Because the peak amplitude of spread spectrum noise is much lower, so, can reduce interference greatly, the radio-frequency (RF) index that helps the handheld device of small size, high power density is improved.
Embodiment three:
The DC/DC converter of in fact, all employing PWM modulation can solve in the same way.Except above-mentioned BUCK buck converter and BOOST booster converter, also comprise other DC/DC converters: such as buck-boost, cuk, zeta, sepic converter.So, can be referred to as the DC/DC converter.
As shown in Figure 4, the signal processing circuit of a kind of DC/DC converter with frequency jitter that provides for the embodiment of the invention.
The signal processing circuit of the DC/DC converter of band frequency jitter can be made up of following components:
1, the fixed frequency generation module 401, are used to produce the input signal of fixed frequency, such as triangular signal, below are that example is described with the triangular signal;
Be understandable that the fixed frequency of generation can be that RC circuit by fixed frequency generation module 401 inside discharges and recharges and produces fixing triangular signal, wherein, so-called " RC circuit " is meant the circuit that the resistance capacitance connection in series-parallel is formed.
2, frequency jitter module 402 is used for that the signal that the fixed frequency generation module produces is carried out frequency jitter and handles;
Concrete, the frequency jitter module can comprise sinusoidal signal generation module (can be realized that this sinusoidal signal generation module does not illustrate in the drawings by sine-wave producer), is realized the function of frequency jitter module 402 by this sinusoidal signal generation module.This sinusoidal signal generation module is used to produce the sinewave modulation signal of fixed frequency, the fixed frequency signal stack that this sinewave modulation signal and fixed frequency generation module 401 produce, and like this, output triangle wave frequency just changes.During specific implementation, sinusoidal signal generation module 402 can be exported a sine wave signal to the inside RC of fixed frequency generation module 401, changes the time relationship that discharges and recharges of inner RC, and the frequency of Shu Chu triangular signal just changes like this.
Perhaps, also have another implementation:
The frequency jitter module can comprise built-in counter module (not shown), by the clock signal that this built-in counter output is shaken within the specific limits, uses this clock signal, and the triangular signal of said fixing frequency is modulated.Wherein, this counter can be built in the power supply chip, and the output frequency of this counter is by the algorithm controls of inside.
What deserves to be explained is that this frequency jitter module 402 can adopt illustrated mode, is integrated in power supply chip inside, also can be arranged on the power supply chip outside of frequency adjustable separately, realize control by the FREQUENCY CONTROL pin that chip is reserved.
3, the signal feedback amplification module 403, are used for producing the feedback amplifying signal, and this feedback amplifying signal is used for the signal of handling through frequency jitter is modulated.
4, output control waveform generation module 404, are used to receive the signal through after the feedback amplifying signal modulation of signal feedback amplification module 403, this signal carried out after Waveform Control handles the signal after the output waveform control and treatment.Signal after the output can driven MOS FET.
Embodiment four:
The embodiment of the invention also provides the signal processing method in a kind of electronic equipment, is applied to adopt in the power supply of DC/DC converter of PWM modulation system, comprising: the input signal of fixed frequency is carried out frequency jitter handle; Modulate by the signal that feeds back after amplifying signal is handled frequency jitter, form signal after feed-back sampling amplification; Signal after feed-back sampling amplification is carried out Waveform Control handle, the output control signal.
Fig. 5 is the oscillogram of various signals in this signal processing, and Fig. 6 is the schematic flow sheet of this signal processing method.Concrete, in conjunction with Fig. 5 and Fig. 6, in the signal processing circuit of the DC/DC converter of being with frequency jitter, the process of signal processing is:
Step 601: the input signal that produces fixed frequency;
In this step, can produce the triangular signal of fixed frequency by fixed frequency generation module 401;
Step 602: the sinewave modulation signal that produces fixed frequency;
In this step, can produce the sinewave modulation signal of fixed frequency by sinusoidal signal generation module 402;
Be understandable that step 601 and 602 can not limit order.
Step 603: use the sinewave modulation signal of fixed frequency that the triangular signal of fixed frequency is modulated;
In this step, can be the triangular signal and the sinusoidal modulation signal stack of fixed frequency.
Step 604: by the feedback amplifying signal signal after superposeing is modulated, formed signal after feed-back sampling amplification;
In this step, after triangular signal and the sinewave modulation signal stack, can pass through the modulation of the feedback amplifying signal of signal feedback amplification module 403, form signal after feed-back sampling amplification, be input to control waveform generation module 404, this signal can be thought the triangular signal after changing on the former triangular signal basis;
Step 605: signal after feed-back sampling amplification is carried out Waveform Control handle, the control signal that generated frequency changes, the signal after the processing can be square wave, with driven MOS FET.
In this step, can carry out Waveform Control by 404 pairs of triangular signals of output control waveform generation module and handle input.
By technique scheme, the switching frequency that can make the DC/DC converter at random shake in the scope of setting.Like this, just the noise that switch is brought is distributed in the whole frequency range, rather than only concentrates on the point, we can say the spread spectrum of having realized noise.Because the peak amplitude of spread spectrum noise is much lower, so, can reduce interference greatly, help the design of whole system, simultaneously just help improving existing EMI (Electromagnetic interference, electromagnetic interference), index such as radio frequency, lay solid technical foundation for next step handheld device reduces volume.
What deserves to be explained is that related circuit in the technical scheme that the embodiment of the invention provides both can be the part of power module, also can be whole power unit.And the power supply that relates to mainly comprises Switching Power Supply.
And the foregoing description describes with the example that is applied as in handheld device, and still, the scheme that the embodiment of the invention provides can be applied on other small-sized electronic equipment for consumption, such as MP3, MP4, palmtop PC or the like equally.So the corresponding techniques effect also can expand on the scheme that is applied to other electronic equipments.
Embodiment five:
The embodiment of the invention also provides a kind of electronic equipment, comprises the signal processing circuit described in the foregoing description, and the power supply of this electronic equipment adopts the DC/DC converter of PWM modulation system.Certainly, except this signal processing electric current, this electronic equipment also comprises the part of other electronic equipments.
In addition, above-mentioned electronic equipment may be a handheld terminal, also may be other small-sized electronic equipment for consumption.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method can instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, this program comprises one of step or its combination of method embodiment when carrying out.
In addition, each functional unit in each embodiment of the present invention can be integrated in the processing module, also can be that the independent physics in each unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1, the signal processing method in a kind of electronic equipment is applied to adopt in the power supply of DC/DC converter of PWM modulation system, it is characterized in that, comprising:
Input signal to fixed frequency carries out the frequency jitter processing;
Modulate by the signal that feeds back after amplifying signal is handled frequency jitter, form signal after feed-back sampling amplification;
Signal after feed-back sampling amplification is carried out Waveform Control handle, the output control signal.
2, the method for claim 1 is characterized in that, the input signal of described fixed frequency is the triangular signal of fixed frequency, and described input signal to fixed frequency carries out the frequency jitter processing and comprises:
Produce the sinewave modulation signal of fixed frequency, use the sinewave modulation signal of described fixed frequency that the triangular signal of described fixed frequency is modulated.
3, the method for claim 1 is characterized in that, the input signal of described fixed frequency is the triangular signal of fixed frequency, and described input signal to fixed frequency carries out the frequency jitter processing and comprises:
By the clock signal that built-in counter output is shaken within the specific limits, use described clock signal, the triangular signal of described fixed frequency is modulated.
4, the signal processing circuit in a kind of electronic equipment is applied to adopt in the power supply of DC/DC converter of PWM modulation system, it is characterized in that, comprising:
The fixed frequency generation module is used to produce the input signal of fixed frequency;
The frequency jitter module is used for that the signal that the fixed frequency generation module produces is carried out frequency jitter and handles;
The signal feedback amplification module is used for producing the feedback amplifying signal, and described feedback amplifying signal is used for the signal of handling through frequency jitter is modulated;
Output control waveform generation module is used to receive the signal through the modulation of signal feedback amplifying signal, this signal is carried out Waveform Control handle, the output control signal.
5, signal processing circuit as claimed in claim 4 is characterized in that, the input signal of described fixed frequency is the triangular signal of fixed frequency,
Described frequency jitter module comprises the sinewave modulation signal generation module, is used to produce the sinewave modulation signal of fixed frequency, and the triangular signal of described fixed frequency is adjusted.
6, signal processing circuit as claimed in claim 4 is characterized in that, the input signal of described fixed frequency is the triangular signal of fixed frequency,
Described frequency jitter module comprises built-in counter, is used to export the clock signal of shake within the specific limits, uses described clock signal that the triangular signal of described fixed frequency is modulated.
7, as each described signal processing circuit of claim 4 to 6, it is characterized in that, also comprise metal oxide semiconductor field effect tube MOSFET in the described circuit, the control signal of described output, the MOSFET that is used for controlling power circuit takes turns conducting.
8, as each described signal processing circuit of claim 4 to 6, it is characterized in that, described frequency jitter module, be integrated in the inside of the power supply chip of the DC/DC converter that adopts the PWM modulation system, perhaps, be arranged on the outside of described power supply chip, realize control by the FREQUENCY CONTROL pin that power supply chip is reserved.
9, a kind of electronic equipment comprises as each described signal processing circuit of claim 4 to 8.
10, electronic equipment as claimed in claim 9 is characterized in that, described electronic equipment comprises handheld terminal and small-sized electronic equipment for consumption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102162965A CN101378570A (en) | 2008-09-23 | 2008-09-23 | Signal processing method, signal processing circuit and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102162965A CN101378570A (en) | 2008-09-23 | 2008-09-23 | Signal processing method, signal processing circuit and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101378570A true CN101378570A (en) | 2009-03-04 |
Family
ID=40421852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102162965A Pending CN101378570A (en) | 2008-09-23 | 2008-09-23 | Signal processing method, signal processing circuit and electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101378570A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795395A (en) * | 2014-01-20 | 2014-05-14 | 海能达通信股份有限公司 | Analog circuit device for anti-shake time slot synchronization |
| CN105978326A (en) * | 2016-06-20 | 2016-09-28 | 浙江大学 | Fiber optic gyroscope embedded DC-DC (Direct Current-Direct Current) power supply with switching frequency being adjustable in real time |
| CN106856635A (en) * | 2016-11-25 | 2017-06-16 | 华为技术有限公司 | A kind of signal generating circuit |
| CN110995249A (en) * | 2019-12-18 | 2020-04-10 | 电子科技大学 | Clock jitter generating device |
-
2008
- 2008-09-23 CN CNA2008102162965A patent/CN101378570A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795395A (en) * | 2014-01-20 | 2014-05-14 | 海能达通信股份有限公司 | Analog circuit device for anti-shake time slot synchronization |
| CN103795395B (en) * | 2014-01-20 | 2016-05-04 | 海能达通信股份有限公司 | A kind of mould electric installation for anti-shake slot synchronization |
| CN105978326A (en) * | 2016-06-20 | 2016-09-28 | 浙江大学 | Fiber optic gyroscope embedded DC-DC (Direct Current-Direct Current) power supply with switching frequency being adjustable in real time |
| CN105978326B (en) * | 2016-06-20 | 2018-07-03 | 浙江大学 | DC-DC power source built in the optical fibre gyro that switching frequency is adjusted in real time |
| CN106856635A (en) * | 2016-11-25 | 2017-06-16 | 华为技术有限公司 | A kind of signal generating circuit |
| CN110995249A (en) * | 2019-12-18 | 2020-04-10 | 电子科技大学 | Clock jitter generating device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10862428B2 (en) | Feed-forward envelope tracking | |
| CN101316114B (en) | Spread-spectrum modulation circuit, variable frequency triangular-wave generator and signal processing method | |
| CN103731107B (en) | For the control circuit and method of the operation for controlling power amplifier | |
| Di Capua et al. | An enhanced model for small-signal analysis of the phase-shifted full-bridge converter | |
| CN102150340B (en) | Transmitters for wireless power transmission | |
| CN201210648Y (en) | Pulse frequency modulated switched mode power source | |
| CN107026663B (en) | Method and apparatus for radio modulator and antenna driver | |
| CN102055313B (en) | Power factor correction control device in fixed frequency constant on time current make-and-break mode | |
| CN105659494A (en) | Power amplification device and method | |
| US10298132B2 (en) | Switching power supply for low step down conversion ratio with reduced switching losses | |
| Shinoda et al. | Voltage-boosting wireless power delivery system with fast load tracker by ΔΣ-modulated sub-harmonic resonant switching | |
| US20190067997A1 (en) | Wireless power transmitting apparatus and method thereof | |
| CN101378570A (en) | Signal processing method, signal processing circuit and electronic device | |
| CN111512534B (en) | Low harmonic down-conversion rectifier for wireless power transfer receiver | |
| Ansari et al. | Evaluation of silicon MOSFETs and GaN HEMTs in soft‐switched and hard‐switched DC‐DC boost converters for domestic PV applications | |
| CN103384117A (en) | Frequency conversion mode converter and regulation and control method thereof | |
| Chen et al. | An open loop digitally controlled hybrid supply modulator achieving high efficiency for envelope tracking with baseband up to 200-MHz | |
| US20220149661A1 (en) | Free-boost class-e amplifier | |
| Glaser et al. | A 900W, 300V to 50V Dc-dc power converter with a 30MHz switching frequency | |
| Celentano et al. | A Zero-Transient Dual-Frequency Control for Class-E Resonant DC–DC Converters | |
| CN204559391U (en) | A kind of Switching DC-DC converter and EMI Filtering device | |
| EP3447890A1 (en) | Reconstructive line modulated resonant converter | |
| Oyane et al. | 13.56 MHz Half-Bridge GaN-HEMT Resonant Inverter Achieving High Power, Low Distortion, and High Efficiency by ‘LS Network’ | |
| Lee et al. | Applications of GaN power devices | |
| CN206892712U (en) | A kind of mobile terminal, DCDC electric supply installations and its DCDC power supply circuits |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090304 |