CN108334183A - A kind of supply voltage automatic adjusument circuit - Google Patents
A kind of supply voltage automatic adjusument circuit Download PDFInfo
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- CN108334183A CN108334183A CN201810079167.XA CN201810079167A CN108334183A CN 108334183 A CN108334183 A CN 108334183A CN 201810079167 A CN201810079167 A CN 201810079167A CN 108334183 A CN108334183 A CN 108334183A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
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Abstract
The present invention provides a kind of supply voltage automatic adjusument circuit, including voltage regulation unit, voltage regulation unit is connected with voltage input unit, current sampling unit and feedback regulation unit, current sampling unit is connected with amplifying unit, feedback regulation unit is connected with power output unit, and feedback regulation unit is also connect with current sampling unit and amplifying unit.Current detecting can be realized by the DC impedance of inductance or the sampling resistor of resistance value very little in the present invention, and loss is low；Control triode operation state after being amplified to current detection signal by amplifier, directly voltage feedback signal controlled, can quick follow current real-time change, fast response time.Present invention design is simple, at low cost, loss is small, can change with load current and quickly adjust output voltage automatically.
Description
Technical field
The invention belongs to voltages to adjust field, and in particular to a kind of supply voltage automatic adjusument circuit.
Background technology
Adaptive voltage scaling (Adaptive Voltage Scaling, AVS) is computer system power supply common one
Kind of power management techniques, can adjust supply voltage in real time according to loading condition, usually supply voltage increase with load current and
It reduces, can not only reduce system power dissipation, power supply dynamic response performance can also be improved.Current Major Systems chip supports AVS
Function, such as the processor chips of intel, Microsemi PCIE Switch chips.
At present in the industry there are mainly two types of AVS realization methods：The first is to use dedicated power supply control chip, such as
The nuclear power power supply chip of intersil, built-in AVS functions, by configuring biasing RDROOPResistance can get the load line declined
(Load Line), this conceptual design complexity and cost are higher；The second way is passive method, i.e., in power output end string
Enter fixed resistance value resistance, makes that fixed negative slope song is presented to load current by the output voltage after fixed resistance value resistance drop
Line, to realize the decline characteristic of output voltage, this method design is simple, reliability is high, but since pressure drop is consumed in fixation
On resistance, system power dissipation cannot be reduced.Lack a kind of design supply voltage simple, at low cost and small power consumption at present adaptively to adjust
Section mode.
This is the deficiencies in the prior art, therefore, in view of the above-mentioned drawbacks in the prior art, it is adaptive to provide a kind of supply voltage
Circuit should be adjusted, is necessary.
Invention content
It is an object of the present invention to which to lack design supply voltage simple, at low cost and small power consumption adaptive for above-mentioned
The defect of regulative mode provides a kind of supply voltage automatic adjusument circuit, to solve the above technical problems.
To achieve the above object, the present invention provides following technical scheme：
A kind of supply voltage automatic adjusument circuit, including voltage regulation unit, it is defeated that voltage regulation unit is connected with voltage
Enter unit, current sampling unit and feedback regulation unit, current sampling unit is connected with amplifying unit, and feedback regulation unit connects
It is connected to power output unit, feedback regulation unit is also connect with current sampling unit and amplifying unit.
Further, voltage regulation unit includes that first voltage adjusts chip, and it includes that voltage is defeated that first voltage, which adjusts chip,
Enter end, voltage output end and pressure feedback port, voltage input end connects voltage input unit, and voltage output end connection electric current is adopted
Sample unit, pressure feedback port connect feedback regulation unit.
Further, voltage input unit includes Input voltage terminal, and Input voltage terminal is connected with the first capacitance, input voltage
End is also connect with voltage regulation unit, the other end ground connection of the first capacitance.
Further, current sampling unit includes that outputting inductance, the first detection resistance, detection capacitance and load current are defeated
Outlet；
One end of outputting inductance is connect with the first detection resistance and voltage regulation unit, the other end of the first detection resistance with
The anode connection of capacitance is detected, the other end of outputting inductance is connect with the cathode of detection capacitance and load current output end；Load
Current output terminal is also connect with feedback regulation unit, and the cathode of the anode and detection capacitance that detect capacitance is gone back and amplifying unit
Connection.The voltage at the DC impedance both ends of the first detection resistance and detection capacitance detecting outputting inductance, the direct current resistance of outputting inductance
Resist for sampling.
Further, amplifying unit includes operational amplifier, operational amplifier include noninverting input, reverse input end with
And output end；
The noninverting input of operational amplifier is connect with the anode of detection capacitance, the reverse input end of operational amplifier and inspection
The cathode connection of capacitance is surveyed, the output end of operational amplifier is connect with feedback regulation unit.
Further, feedback regulation unit includes first resistor, second resistance, 3rd resistor, triode, load outputs
And feedback output end；
The base stage of triode and the output end of operational amplifier connect, and the collector of triode and one end of 3rd resistor connect
It connects, the other end of 3rd resistor and the load current output end and first resistor and load outputs of current sampling unit connect
It connects；The other end of first resistor is connect with second resistance, the emitter of triode and feedback output end, second resistance it is another
End ground connection；
Load outputs are connect with voltage output unit, and feedback output end is connect with voltage regulation unit.
Further, triode uses NPN type triode.
Further, voltage output unit include the second capacitance, third capacitance and load connecting pin, load connecting pin with
The load outputs of second capacitance, third capacitance and feedback regulation unit connect.Second capacitance, third capacitance and output electricity
Sense collective effect is filtered output.
Further, voltage regulation unit adjusts chip using the built-in second voltage of inductance；
Current sampling unit includes the second detection resistance, and second detection resistance one end is connect with voltage regulation unit, and second
The detection resistance other end is connected with load current output end；Load current output end is also connect with feedback regulation unit, the second inspection
The both ends of measuring resistance are connect with amplifying unit.
The beneficial effects of the present invention are：
Current detecting can be realized by the DC impedance of inductance or the sampling resistor of resistance value very little in the present invention, loss
It is low；After being amplified to current detection signal by amplifier control triode operation state, directly to voltage feedback signal into
Row control, can quick follow current real-time change, fast response time.Present invention design is simple, at low cost, loss is small, can be with negative
It carries curent change and quickly adjusts output voltage automatically.
In addition, design principle of the present invention is reliable, and it is simple in structure, there is very extensive application prospect.
It can be seen that compared with prior art, the present invention with substantive distinguishing features outstanding and significant progress, implement
Advantageous effect be also obvious.
Description of the drawings
Fig. 1 is each unit connection diagram of the present invention；
Fig. 2 is the circuit diagram one of the embodiment of the present invention；
Fig. 3 is the circuit diagram two of the embodiment of the present invention；
Wherein, 1- voltage regulation units；2- voltage input units；3- current sampling units；4- amplifying units；5- feedbacks are adjusted
Save unit；6- voltage output units；U1- first voltages adjust chip；U1`- second voltages adjust chip；U2- operational amplifiers；
R1- first resistors；R2- second resistances；R3- 3rd resistors；The first detection resistances of Rs-；The second detection resistances of Rs`-；C1- first
Capacitance；The second capacitances of C2-；C3- third capacitances；Cn- detects capacitance；Q1- triodes；L1- outputting inductances；IN- voltage input ends；
SW- voltage output ends；FB- pressure feedback ports；VIN- Input voltage terminals；VOUT- loads connecting pin.
Specific implementation mode：
To enable the purpose of the present invention, feature, advantage more apparent and understandable, below in conjunction with of the invention specific
The technical solution in the present invention is clearly and completely described in attached drawing in embodiment.
As depicted in figs. 1 and 2, the present invention provides a kind of supply voltage automatic adjusument circuit, including voltage regulation unit
1, voltage regulation unit 1 is connected with voltage input unit 2, current sampling unit 3 and feedback regulation unit 5, current sample list
Member 3 is connected with amplifying unit 4, and feedback regulation unit 5 is connected with power output unit 6, and feedback regulation unit 5 is gone back and current sample
Unit 3 and amplifying unit 4 connect；
Voltage regulation unit 1 includes that first voltage adjusts chip U1, and it includes voltage input end that first voltage, which adjusts chip U1,
IN, voltage output end SW and pressure feedback port FB, voltage input end IN connections voltage input unit 2, voltage output end SW connect
Connect current sampling unit 3, pressure feedback port FB connection feedback regulations unit 5；It is buck that first voltage, which adjusts chip U1,
The voltage of BUCK transducer types adjusts chip；
Voltage input unit 2 includes Input voltage terminal VIN, and Input voltage terminal VIN is connected with the first capacitance C1, input voltage
End VIN is also connect with the voltage input end IN of voltage regulation unit 1, the other end ground connection of the first capacitance C1；
Current sampling unit 3 includes outputting inductance L1, the first detection resistance Rs, detection capacitance Cn and load current output
End 3.1；
One end of outputting inductance L1 is connect with the voltage output end SW of the first detection resistance Rs and voltage regulation unit 1, the
The other end of one detection resistance Rs is connect with the anode of detection capacitance Cn, the other end of outputting inductance L1 and bearing for detection capacitance Cn
Pole and load current output end 3.1 connect；Load current output end 3.1 is also connect with feedback regulation unit 5, detection capacitance Cn's
The cathode of anode and detection capacitance Cn are also connect with amplifying unit 4；Current sampling unit uses RC circuits, RC circuits to examine
The pressure drop of the DC impedance of outputting inductance is surveyed, capacitance Cn " leads to and hands over blocking ", no electric current on the first detection resistance Rs, capacitance Cn two
Terminal voltage is the pressure drop of inductance DC impedance, and because of the DC impedance very little of inductance, be can be ignored, capacitance Cn both end voltages are equivalent
For current detection signal；
Amplifying unit 4 includes operational amplifier U2, and operational amplifier U2 includes noninverting input, reverse input end and defeated
Outlet；It is Ω grades of m due to the DC impedance DCR very littles of inductance, therefore capacitance Cn both end voltage very littles, it need to be through operational amplifier
Triode Q1 could be effectively driven after U2 amplifications；
The noninverting input of operational amplifier U2 is connect with the anode of detection capacitance Cn, the reversed input of operational amplifier U2
The cathode with detection capacitance Cn is held to connect, the output end of operational amplifier U2 is connect with feedback regulation unit 5；
Feedback regulation unit 5 includes first resistor R1, second resistance R2,3rd resistor R3, triode Q1, load outputs
5.1 and feedback output end 5.2；
The base stage of triode Q1 and the output end of operational amplifier connect, and the collector of triode Q1 is with 3rd resistor R3's
One end connects, the other end of 3rd resistor R3 and the load current output end 3.1 of current sampling unit 3 and first resistor R1 and
Load outputs 5.1 connect；The other end of first resistor R1 is exported with second resistance R2, the emitter of triode Q1 and feedback
5.2 connection of end, the other end ground connection of second resistance R2；Triode Q1 uses NPN type triode；
Load outputs 5.1 are connect with voltage output unit 6, and feedback output end 5.2 and the voltage of voltage regulation unit 1 are anti-
Present end FB connections；Amplified current detection signal control triode Q1 be in different working condition, including cut-off, amplify and
Saturation state, triode Q1 are operated in the resistance that different conducting depth is equivalent to a change in resistance in circuit, with third electricity
Resistance R3 influences the feedback signal of feedback output end 5.2 together, to control the output voltage of load outputs 5.1；
Voltage output unit 6 includes the second capacitance C2, third capacitance C3 and load connecting pin VOUT, loads connecting pin
VOUT is connect with the load outputs 5.1 of the second capacitance C2, third capacitance C3 and feedback regulation unit 5；
The operation principle of this circuit：
1) when power supply is unloaded or load current very little, the voltage very little of the output end of operational amplifier U2 is set as Vc, and three
Pole pipe Q1 is in cut-off state, and the equivalent resistance of transistor collector and emitter is very big, is set as RCE, approximation open circuit, collector
With the equivalent resistance R of emitterCEInfluence with 3rd resistor R3 to first resistor R1 and second resistance R2 feedback partial pressures is negligible,
If the output voltage of load connecting pin VOUT is Vout, if the output voltage of feedback output end 5.2 is Vref, Vref is simultaneously the
One voltage adjusts chip U1 and provides internal reference voltage, at this time output voltage
2) with the increase of load current, capacitance Cn both end voltages increase, the voltage Vc of the output end of operational amplifier U1
Increase, triode Q1 enters amplification region, the equivalent resistance R of collector and emitterCEReduce, the equivalent electricity of collector and emitter
Hinder RCEWith 3rd resistor R3 partial pressure, output voltage are fed back together with first resistor R1 and second resistance R2Output voltage starts to reduce, and output current is bigger, and output voltage Vout is got over
Small, taper off characteristic；
3) output current continues to increase to full load, and depth down is connected in triode Q1, into saturation workspace, collector
With the equivalent resistance of emitterRCEVery little can be ignored, at this time only 3rd resistor R3 and first resistor R1 and second resistance R2 mono-
Feedback partial pressure is played, output voltage reaches minimum, is
The circuit of the present invention operates mainly in 2) triode Q1 and is in magnification region, and the DC impedance of outputting inductance is set as
DCR, maximum current is set as Io_max, triode Q1 base stage threshold voltages are set as U for loadBE(th)And operational amplifier U2 amplifications
When multiple is set as A, when meeting A*DCR*Io_max=UBE(th)When, in load current variation range, triode Q1 has always
The equivalent resistance of decline, to make output voltage successively decrease always with the increase of load current.
As shown in figures 1 and 3, the present invention provides a kind of supply voltage automatic adjusument circuit, including voltage regulation unit
1, voltage regulation unit 1 is connected with voltage input unit 2, current sampling unit 3 and feedback regulation unit 5, current sample list
Member 3 is connected with amplifying unit 4, and feedback regulation unit 5 is connected with power output unit 6, and feedback regulation unit 5 is gone back and current sample
Unit 3 and amplifying unit 4 connect；
Voltage regulation unit 1 includes that second voltage adjusts chip U1`, and it includes control source that second voltage, which adjusts chip U1`,
Hold IN, voltage output end SW and pressure feedback port FB, voltage input end IN connections voltage input unit 2, voltage output end SW
Connect current sampling unit 3, pressure feedback port FB connection feedback regulations unit 5；
Voltage input unit 2 includes Input voltage terminal VIN, and Input voltage terminal VIN is connected with the first capacitance C1, input voltage
End VIN is also connect with the voltage input end IN of voltage regulation unit 1, the other end ground connection of the first capacitance C1；
It is that the built-in voltage of inductance adjusts chip that second voltage, which adjusts chip U1`,；
Current sampling unit 3 includes the second detection resistance Rs`, and second one end detection resistance Rs` connects with voltage regulation unit 1
It connects, the second detection resistance Rs` other ends are connected with load current output end 3.1；Load current output end 3.1 is gone back and feedback regulation
Unit 5 connects, and the both ends of the second detection resistance Rs` are connect with amplifying unit 4；
Amplifying unit 4 includes operational amplifier U2, and operational amplifier U2 includes noninverting input, reverse input end and defeated
Outlet；
The noninverting input of operational amplifier U2 connects with the second detection resistance Rs` with one end that voltage regulation unit 1 is connect
It connects, the reverse input end of operational amplifier U2 connects with the second detection resistance Rs` with one end that load current output end 3.1 is connect
It connects, the output end of operational amplifier U2 is connect with feedback regulation unit 5；
Feedback regulation unit 5 includes first resistor R1, second resistance R2,3rd resistor R3, triode Q1, load outputs
5.1 and feedback output end 5.2；
The base stage of triode Q1 and the output end of operational amplifier connect, and the collector of triode Q1 is with 3rd resistor R3's
One end connects, the other end of 3rd resistor R3 and the load current output end 3.1 of current sampling unit 3 and first resistor R1 and
Load outputs 5.1 connect；The other end of first resistor R1 is exported with second resistance R2, the emitter of triode Q1 and feedback
5.2 connection of end, the other end ground connection of second resistance R2；Triode Q1 uses NPN type triode；
Load outputs 5.1 are connect with voltage output unit 6, and feedback output end 5.2 and the voltage of voltage regulation unit 1 are anti-
Present end FB connections；
Voltage output unit 6 includes the second capacitance C2, third capacitance C3 and load connecting pin VOUT, loads connecting pin
VOUT is connect with the load outputs 5.1 of the second capacitance C2, third capacitance C3 and feedback regulation unit 5.
Current detecting, intimate nothing can be realized by the DC impedance of inductance or the sampling resistor of resistance value very little in the present invention
Damage, then current detection signal is amplified by amplifier；The amplified control triode operation state of current detection signal,
Directly voltage feedback signal is controlled, can quick follow current real-time change, fast response time.
It is also possible to apply the invention to built-in inductance type power modules and linear power supply voltage-stablizer application, connect in output end smart
Close sampling resistor detects output current, and amplifier is amplified current signal, therefore sampling resistor resistance value is connected compared with passive method
Resistance is much smaller, and loss is also much smaller.
The embodiment of the present invention is illustrative and not restrictive, and above-described embodiment is only to aid in the understanding present invention, because
The present invention is not limited to the embodiments described in specific implementation mode for this, every by those skilled in the art's technique according to the invention
Other specific implementation modes that scheme obtains, also belong to the scope of protection of the invention.
Claims (9)
1. a kind of supply voltage automatic adjusument circuit, which is characterized in that including voltage regulation unit（1）, voltage regulation unit
（1）It is connected with voltage input unit（2）, current sampling unit（3）And feedback regulation unit（5）, current sampling unit（3）Even
It is connected to amplifying unit（4）, feedback regulation unit（5）It is connected with power output unit（6）, feedback regulation unit（5）Also with electric current
Sampling unit（3）And amplifying unit（4）Connection.
2. a kind of supply voltage automatic adjusument circuit as described in claim 1, which is characterized in that voltage regulation unit（1）
Chip is adjusted including first voltage（U1）, first voltage adjusting chip（U1）Including voltage input end（IN）, voltage output end
（SW）And pressure feedback port（FB）, voltage input end（IN）Connect voltage input unit（2）, voltage output end（SW）Connection electricity
Flow sampling unit（3）, pressure feedback port（FB）Connect feedback regulation unit（5）.
3. a kind of supply voltage automatic adjusument circuit as described in claim 1, which is characterized in that voltage input unit（2）
Including Input voltage terminal（VIN）, Input voltage terminal（VIN）It is connected with the first capacitance（C1）, Input voltage terminal（VIN）Also with voltage
Adjust unit（1）Connection, the first capacitance（C1）The other end ground connection.
4. a kind of supply voltage automatic adjusument circuit as described in claim 1, which is characterized in that
Current sampling unit（3）Including outputting inductance（L1）, the first detection resistance（Rs）, detection capacitance（Cn）And load current
Output end（3.1）；
Outputting inductance（L1）One end and the first detection resistance（Rs）And voltage regulation unit（1）Connection, the first detection resistance
（Rs）The other end with detection capacitance（Cn）Anode connection, outputting inductance（L1）The other end with detection capacitance（Cn）Cathode
With load current output end（3.1）Connection；Load current output end（3.1）Also with feedback regulation unit（5）Connection detects capacitance
（Cn）Anode and detection capacitance（Cn）Cathode also and amplifying unit（4）Connection.
5. a kind of supply voltage automatic adjusument circuit as claimed in claim 4, which is characterized in that amplifying unit（4）Including
Operational amplifier（U2）, operational amplifier（U2）Including noninverting input, reverse input end and output end；
Operational amplifier（U2）Noninverting input with detection capacitance（Cn）Anode connection, operational amplifier（U2）It is reversed defeated
Enter end and detection capacitance（Cn）Cathode connection, operational amplifier（U2）Output end and feedback regulation unit（5）Connection.
6. a kind of supply voltage automatic adjusument circuit as claimed in claim 5, which is characterized in that feedback regulation unit（5）
Including first resistor（R1）, second resistance（R2）, 3rd resistor（R3）, triode（Q1）, load outputs（5.1）And feedback
Output end（5.2）；
Triode（Q1）Base stage and operational amplifier output end connect, triode（Q1）Collector and 3rd resistor（R3）
One end connection, 3rd resistor（R3）The other end and current sampling unit（3）Load current output end（3.1）With the first electricity
Resistance（R1）And load outputs（5.1）Connection；First resistor（R1）The other end and second resistance（R2）, triode（Q1）'s
Emitter and feedback output end（5.2）Connection, second resistance（R2）The other end ground connection；
Load outputs（5.1）With voltage output unit（6）Connection, feedback output end（5.2）With voltage regulation unit（1）Even
It connects.
7. a kind of supply voltage automatic adjusument circuit as claimed in claim 6, which is characterized in that triode（Q1）Using
NPN type triode.
8. a kind of supply voltage automatic adjusument circuit as claimed in claim 6, which is characterized in that voltage output unit（6）
Including the second capacitance（C2）, third capacitance（C3）And load connecting pin（VOUT）, load connecting pin (VOUT) and the second capacitance
（C2）, third capacitance（C3）And feedback regulation unit（5）Load outputs（5.1）Connection.
9. a kind of supply voltage automatic adjusument circuit as described in claim 1, which is characterized in that voltage regulation unit（1）
Chip is adjusted including the built-in second voltage of inductance（U1`）；
Current sampling unit（3）Including the second detection resistance（Rs`）, the second detection resistance（Rs`）One end and voltage regulation unit
（1）Connection, the second detection resistance（Rs`）The other end is connected with load current output end（3.1）；Load current output end（3.1）
Also with feedback regulation unit（5）Connection, the second detection resistance（Rs`）Both ends and amplifying unit（4）Connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810079167.XA CN108334183B (en) | 2018-01-26 | 2018-01-26 | Power supply voltage self-adaptive adjusting circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810079167.XA CN108334183B (en) | 2018-01-26 | 2018-01-26 | Power supply voltage self-adaptive adjusting circuit |
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| Publication Number | Publication Date |
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| CN108334183A true CN108334183A (en) | 2018-07-27 |
| CN108334183B CN108334183B (en) | 2021-06-29 |
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|---|---|---|---|
| CN201810079167.XA Active CN108334183B (en) | 2018-01-26 | 2018-01-26 | Power supply voltage self-adaptive adjusting circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110798173A (en) * | 2019-10-18 | 2020-02-14 | 浙江中控技术股份有限公司 | Fieldbus power regulator circuit |
| CN112350575A (en) * | 2020-09-11 | 2021-02-09 | 苏州浪潮智能科技有限公司 | Buck circuit for dynamically adjusting output voltage and dynamic adjusting method |
| CN114114112A (en) * | 2020-09-01 | 2022-03-01 | 西门子(深圳)磁共振有限公司 | Input voltage regulating circuit and method of coil and magnetic resonance imaging system |
| CN114123776A (en) * | 2021-11-03 | 2022-03-01 | 山东有人物联网股份有限公司 | Switching power supply circuit and device, ripple wave adjusting method and storage medium |
| CN114924519A (en) * | 2022-07-18 | 2022-08-19 | 浙江芯昇电子技术有限公司 | Load stabilizing system and method |
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| CN201985759U (en) * | 2011-02-28 | 2011-09-21 | 广州视源电子科技有限公司 | DCDC (direct current direct current) output circuit |
| CN104199531A (en) * | 2014-08-22 | 2014-12-10 | 山东超越数控电子有限公司 | Method for decoupling short-circuit current of CPCI redundant power source |
| CN206807293U (en) * | 2017-05-27 | 2017-12-26 | 郑州云海信息技术有限公司 | A kind of VR adjustable circuit of output voltage |
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| CN201985759U (en) * | 2011-02-28 | 2011-09-21 | 广州视源电子科技有限公司 | DCDC (direct current direct current) output circuit |
| CN104199531A (en) * | 2014-08-22 | 2014-12-10 | 山东超越数控电子有限公司 | Method for decoupling short-circuit current of CPCI redundant power source |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110798173A (en) * | 2019-10-18 | 2020-02-14 | 浙江中控技术股份有限公司 | Fieldbus power regulator circuit |
| CN114114112A (en) * | 2020-09-01 | 2022-03-01 | 西门子(深圳)磁共振有限公司 | Input voltage regulating circuit and method of coil and magnetic resonance imaging system |
| CN114114112B (en) * | 2020-09-01 | 2023-08-29 | 西门子(深圳)磁共振有限公司 | Coil input voltage regulating circuit, method and magnetic resonance imaging system |
| CN112350575A (en) * | 2020-09-11 | 2021-02-09 | 苏州浪潮智能科技有限公司 | Buck circuit for dynamically adjusting output voltage and dynamic adjusting method |
| CN114123776A (en) * | 2021-11-03 | 2022-03-01 | 山东有人物联网股份有限公司 | Switching power supply circuit and device, ripple wave adjusting method and storage medium |
| CN114123776B (en) * | 2021-11-03 | 2024-02-02 | 山东有人物联网股份有限公司 | Switching power supply circuit and device, ripple adjusting method and storage medium |
| CN114924519A (en) * | 2022-07-18 | 2022-08-19 | 浙江芯昇电子技术有限公司 | Load stabilizing system and method |
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| Publication number | Publication date |
|---|---|
| CN108334183B (en) | 2021-06-29 |
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