CN107024955A - Voltage generation circuit and supply unit - Google Patents
Voltage generation circuit and supply unit Download PDFInfo
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- CN107024955A CN107024955A CN201710398070.0A CN201710398070A CN107024955A CN 107024955 A CN107024955 A CN 107024955A CN 201710398070 A CN201710398070 A CN 201710398070A CN 107024955 A CN107024955 A CN 107024955A
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- voltage
- feeder ear
- supply voltage
- transistor
- adjustment unit
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/561—Voltage to current converters
-
- 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
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3234—Power saving characterised by the action undertaken
- G06F1/325—Power saving in peripheral device
- G06F1/3265—Power saving in display device
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
Abstract
The invention discloses voltage generation circuit and supply unit, voltage generation circuit includes：At least three feeder ears, at least three feeder ears are divided into first group of feeder ear and second group of feeder ear, each feeder ear that each feeder ear in first group of feeder ear is used to provide in the first different supply voltages, second group of feeder ear is used to provide the second different supply voltages；Control module, it is used to produce selection signal according to the desired value of output voltage；Voltage transformation module, it is optionally connected to receive corresponding first supply voltage according to selection signal with one in first group of feeder ear, and be connected with one in second group of feeder ear to receive corresponding second supply voltage, and output voltage is produced according to the first supply voltage received and the second supply voltage.The voltage generation circuit and supply unit that the present invention is provided on the premise of the adjustable extent for ensureing output voltage is constant, can improve the conversion efficiency of circuit and reduce system power dissipation.
Description
Technical field
The present invention relates to electronic technology field, more particularly, to voltage generation circuit and supply unit.
Background technology
With touch technology and the gradually maturation of Display Technique, touch-control display panel has been widely used in each neck
In domain, especially various mobile terminal systems.
Touch-control display panel generally includes touch-control and display driving integration module (Touch and Display Driver
Integration, TDDI), after the supply voltage that battery is provided is converted into several basic voltages by mobile terminal system,
Voltage generation circuit in TDDI is used to produce the common electric voltage with certain adjustable extent according to these basic voltages so that
Public electrode in touch-control display panel can be driven by the common electric voltage, so as to realize normal display and touch-control.
Because in the adjustable extent of the common electric voltage needed for touch-control display panel, generally only some scope is conventional
Scope, the now output in order to ensure the voltage generation circuit in TDDI disclosure satisfy that the complete adjustable extent of common electric voltage,
The positive supply voltage of amplitude and the negative supply voltage of amplitude must be provided voltage generation circuit.
By taking intelligent mobile phone system as an example, intelligent mobile phone system by the supply voltage that battery of mobile phone is provided be converted to ± 5.6V and
1.8V supply voltage.Fig. 1 shows the structural representation of voltage generation circuit in the TDDI of prior art.As shown in figure 1, electric
Generation circuit 100 is pressed to include electric capacity C0, error amplifier OP0 and two adjustment pipe M1 and M2, adjustment pipe M1 and M2 are connected on the
Between one supply voltage and the second supply voltage, adjustment pipe M1 and M2 common port provide common electric voltage Vcom, electric capacity C0 connections
Between adjustment pipe M1 and M2 common port and ground, adjustment pipe M1 and M2 turn-on and turn-off are controlled by error amplifier
OP0 output.Error amplifier OP1 negative-phase input receives reference voltage Vref, normal phase input end and receives common electric voltage
Vcom.The need for touch control display apparatus, voltage generation circuit 100 needs output -4V to 1V common electric voltage Vcom, therefore
1.8V and -5.6V are selected respectively as the first supply voltage and the second supply voltage, to ensure that common electric voltage Vcom's is correct defeated
Go out scope.However, due in touch control display apparatus, export to the common electric voltage Vcom of public electrode usual range be-
2.5V to 0V, such as when voltage generation circuit 100 exports -1V common electric voltage Vcom, voltage generation circuit 100 substantially needs
1mA electric current is produced, the power of consumption is about 5.6mW, and now the conversion efficiency of voltage generation circuit 100 is only 1/5.6=
18%.
Therefore, when required common electric voltage is in usual range, the conversion efficiency of traditional voltage generation circuit is very low,
Cause the waste in power consumption；Further, because in touch-control display panel normal work, traditional voltage generation circuit will
Worked for a long time in the state of conversion efficiency is low, therefore power wastage situation can be caused more serious.
The content of the invention
In order to solve the problem of above-mentioned prior art is present, the present invention provides a kind of voltage generation circuit and supply unit,
It on the premise of the adjustable extent for ensureing output voltage is constant, can improve the conversion efficiency of circuit and reduce system power dissipation.
According to an aspect of the present invention there is provided a kind of voltage generation circuit, it is used to provide defeated with adjustable extent
Go out voltage, it is characterised in that the voltage generation circuit includes：At least three feeder ears, at least three feeder ear is divided into
Each feeder ear in first group of feeder ear and second group of feeder ear, first group of feeder ear is used to provide the first different power supplies
Each feeder ear in voltage, second group of feeder ear is used to provide the second different supply voltages；Control module, it is used for root
Selection signal is produced according to the desired value of the output voltage；Voltage transformation module, its according to the selection signal optionally with
One in first group of feeder ear is connected to receive corresponding first supply voltage, and is powered with described second group
One in end is connected to receive corresponding second supply voltage, and according to first supply voltage received and institute
State the second supply voltage and produce the output voltage.
Preferably, the voltage transformation module includes：Adjustment unit, it optionally receives institute according to the selection signal
One of one of multiple first supply voltages and the multiple second supply voltage are stated, and will be received in the presence of control signal
First supply voltage or second supply voltage that receives be converted into the output voltage；Amplifier, its is anti-phase
Input receives the reference voltage set according to the desired value of the output voltage, and its normal phase input end receives the output voltage
Or obtained sampled voltage of being sampled according to setting ratio to the output voltage, its output end offer control signal, it is just
Feeder ear optionally receives one of described first supply voltage according to the selection signal, and its negative feeder ear is according to the selection
Receive one of described second supply voltage signal-selectivity.
Preferably, first supply voltage that each feeder ear in first group of feeder ear is provided is more than etc.
Second supply voltage that each feeder ear in 0, second group of feeder ear is provided is less than 0.
Preferably, the output end of the amplifier includes the first output end and the second output end, and the control signal includes
The first control signal exported by first output end and the second control signal exported by second output end, it is described
Adjustment unit includes：First adjustment unit, its be used for according to the selection signal optionally with first group of feeder ear
One be connected to receive corresponding first supply voltage, the opening and closing of first adjustment unit are controlled by described
First control signal, when first adjustment unit is opened, the output end of first adjustment unit provides positive adjustment electricity
Stream；Second adjustment unit, it is used to optionally with one in second group of feeder ear be connected according to the selection signal
To receive corresponding second supply voltage, the opening and closing of second adjustment unit are controlled by the second control letter
Number, when second adjustment unit is opened, the output end of second adjustment unit provides anti-phase adjustment electric current, the positive
Adjust electric current or the anti-phase adjustment function of current produces the output voltage in load.
Preferably, first adjustment unit includes：Multiple the first transistors, the of each the first transistor
One path terminal is connected with each feeder ear in first group of feeder ear respectively, and the second of the multiple the first transistor leads to
Terminal is interconnected using the output end as first adjustment unit；First choice is switched, for being selected according to the selection signal
Property the control end of one of the multiple the first transistor is connected with the first output end of the amplifier.
Preferably, first adjustment unit includes：The first transistor, the control end of the first transistor is put with described
Second output end of big device is connected, the first path terminal of the first transistor as first adjustment unit output end；
Second selecting switch, for according to the selection signal optionally by the alternate path end of the first transistor and described the
One in one group of feeder ear is connected to receive corresponding first supply voltage.
Preferably, the first transistor is p channel transistor.
Preferably, second adjustment unit includes：Multiple second transistors, the of each second transistor
One path terminal is connected with each feeder ear in second group of feeder ear respectively, and the second of the multiple second transistor leads to
Terminal is interconnected using the output end as second adjustment unit, the 3rd selecting switch, for being selected according to the selection signal
Property the control end of one of the multiple second transistor is connected with the second output end of the amplifier.
Preferably, second adjustment unit includes：Second transistor, the control end of the second transistor is put with described
Second output end of big device is connected, the first path terminal of the second transistor as second adjustment unit output end；
4th selecting switch, for according to the selection signal optionally by the alternate path end of the second transistor and described the
One in two groups of feeder ears is connected to receive corresponding second supply voltage.
Preferably, the second transistor is N-channel transistor.
According to another aspect of the present invention, a kind of supply unit is additionally provided, it is characterised in that including：Battery, for carrying
Power supply source voltage；Voltage generation circuit described in any one as described above, the multiple feeder ear point of the voltage generation circuit
A variety of supply voltages are not received to produce the output voltage；And power supply circuit, for producing described different first
Supply voltage and the second different supply voltage.
The beneficial effects of the invention are as follows, compared with prior art, voltage generation circuit and the power supply dress of the embodiment of the present invention
Put and the supply voltage of voltage generation circuit is selected and switched according to the desired value of output voltage, both ensure that voltage is produced
The adjustable extent of the output voltage of circuit, has been obviously improved the conversion efficiency of voltage generation circuit, has reduced system power dissipation again, from
And the working time of system is extended, realize power saving design.
Brief description of the drawings
By description referring to the drawings to the embodiment of the present invention, above-mentioned and other purposes of the invention, feature and
Advantage will be apparent from.
Fig. 1 shows the structural representation of voltage generation circuit in the TDDI of prior art.
Fig. 2 shows the schematic block diagram of the supply unit of the embodiment of the present invention.
Fig. 3 shows the structural representation of the voltage generation circuit of the embodiment of the present invention.
Fig. 4 shows the desired value of output voltage of the embodiment of the present invention and the positive supply voltage of voltage generation circuit and anti-phase
Corresponding relation schematic diagram between supply voltage.
Fig. 5 shows the structural representation of voltage transformation module in Fig. 3.
Fig. 6 a show a kind of schematic diagram for realizing structure of the first adjustment unit in Fig. 5.
Fig. 6 b show another schematic diagram for realizing structure of the first adjustment unit in Fig. 5.
Fig. 7 a show a kind of schematic diagram for realizing structure of the second adjustment unit in Fig. 5.
Fig. 7 b show another schematic diagram for realizing structure of the second adjustment unit in Fig. 5.
Embodiment
The present invention is more fully described hereinafter with reference to accompanying drawing.In various figures, identical element is using similar attached
Icon is remembered to represent.For the sake of clarity, the various pieces in accompanying drawing are not necessarily to scale.In addition, may not show in figure
Go out some known parts.
It describe hereinafter many specific details of the present invention, structure, material, size, the processing work of such as device
Skill and technology, to be more clearly understood that the present invention.But just as the skilled person will understand, it can not press
The present invention is realized according to these specific details.
Below, the present invention is described in detail referring to the drawings.
Fig. 2 shows the schematic block diagram of the supply unit of the embodiment of the present invention.
As shown in Fig. 2 the supply unit 1000 of the embodiment of the present invention is applied in touch control display apparatus, supply unit 1000
Including battery 1100, power supply circuit 1200 and voltage generation circuit 1300.
The supply voltage V0 that power supply circuit 1200 is used to be provided according to battery 1100 produces a variety of supply voltage (such as Fig. 2
Shown supply voltage Vp1, supply voltage Vp2, supply voltage Vn1 and supply voltage Vn2).
Voltage generation circuit 1300 is used to provide the output voltage Vout with adjustable extent, and output voltage Vout is for example
It is applied to as common electric voltage Vcom on each public electrode in touch control display apparatus.Voltage generation circuit 1300 for example comprising
In TDDI.In the present embodiment, voltage generation circuit 1300 has at least three to be respectively used to receive different power voltage
Feeder ear, wherein, feeder ear includes being used to provide first group of feeder ear of the first different supply voltages and for providing difference
The second supply voltage second group of feeder ear, for example, each feeder ear in first group of feeder ear provided first power supply
What each feeder ear that voltage is more than or equal in 0 (such as supply voltage Vp1 and Vp2 shown in Fig. 2), second group of feeder ear was provided
Second supply voltage is less than 0 (such as supply voltage Vn1 and Vn2 shown in Fig. 2).
Fig. 3 shows the structural representation of the voltage generation circuit of the embodiment of the present invention.
As shown in figure 3, the voltage generation circuit 1300 of the embodiment of the present invention includes control module 1310 and voltage conversion mould
Block 1320.
Control module 1310 provides selection signal sel according to the desired value of output voltage, and selection signal sel is used for each the
The positive supply voltage of voltage transformation module 1320 is selected in one supply voltage and voltage is selected in each second supply voltage
The anti-phase supply voltage of modular converter 1320.Selection signal sel is, for example, the data signal of 2, selection signal sel lowest order
Sel [0] is used for the positive supply voltage for selecting voltage transformation module 1320, and selection signal sel highest order sel [1] is used to select
Select the anti-phase supply voltage of voltage transformation module 1320.
Voltage transformation module 1320 is connected to receive each amplitude more than or equal to 0 first supply voltage with first group of feeder ear
(such as supply voltage Vp1 and Vp2 in Fig. 3), and be connected to receive second power supply of each amplitude less than 0 with second group of feeder ear
Voltage (such as Vn1 and Vn2 in Fig. 3).The selection signal that voltage transformation module 1320 is exported according to control module 1310 is most
Low level sel [0] selects one of each first supply voltage to be selected as positive supply voltage, according to the highest order sel [1] of selection signal
One of each second supply voltage is selected as anti-phase supply voltage.Voltage transformation module 1320 is in positive supply voltage and anti-phase power supply
Output voltage Vout is produced in the presence of voltage.
Voltage transformation module 1320 is, for example, low pressure difference linearity Voltage stabilizing module (Low Dropout Regulator, LDO).
Fig. 4 shows the desired value of the output voltage of the embodiment of the present invention and the positive supply voltage of voltage transformation module and anti-
Corresponding relation schematic diagram between phase supply voltage.
As a kind of specific embodiment, as shown in Fig. 2 the supply voltage that the battery 1100 in supply unit 1000 is produced
V0 is approximately equal to 4.2V to 3.7V.The adjustable extent of output voltage is divided into using probability according to output voltage Vout amplitude
One subrange to the 3rd subrange, the amplitude of each supply voltage is determined according to the boundary value of the first to the 3rd subrange.Touch-control shows
In showing device, the adjustable range needed for common electric voltage on public electrode be, for example, -4V to 1V, and wherein conventional amplitude range
About -2.8V to 0V, therefore, in order to improve the conversion efficiency of voltage generation circuit 1300, power supply circuit 1200 is according to power supply electricity
V0 is pressed to produce supply voltage Vp1=0V, supply voltage Vp2=+1.8V, supply voltage Vn1=-2.8V and supply voltage Vn2
=-5.6V, wherein supply voltage Vn1 can be converted to by supply voltage Vn2 and (for example utilize charge pump).Voltage generation circuit
1300 produce amplitude adjustable output voltage Vout in the range of -4V to+1V using above-mentioned four kinds of supply voltages.
Specifically, as shown in Figure 4：When output voltage Vout (correspond to common electric voltage) desired value more than or equal to-
2.8V and less than or equal to 0V the first subrange (conventional) it is interior when, voltage generation circuit 130 in the presence of selection signal sel general
Supply voltage Vp1=0V as positive supply voltage, in the presence of selection signal sel using supply voltage Vn1=-2.8V as
Anti-phase supply voltage；When output voltage Vout desired value more than or equal to -4V and less than -2.8V the second subrange (seldom
With) it is interior when, voltage generation circuit 130 is in the presence of selection signal sel by supply voltage Vp1=0V (first group of feeder ear institute
The first minimum supply voltage of reception) as positive supply voltage, in the presence of selection signal sel by supply voltage Vn2
=-5.6V is used as anti-phase supply voltage；When output voltage Vout desired value is in the 3rd sub- model more than 0V and less than or equal to 1V
When enclosing and (be of little use) interior, voltage generation circuit 130 is in the presence of selection signal sel using supply voltage Vp2=1.8V as just
Phase supply voltage, by supply voltage Vn1=-2.8V, (it is absolute that second group of feeder ear is received in the presence of selection signal sel
It is worth the second minimum supply voltage) it is used as anti-phase supply voltage.Compared with prior art, the voltage of the embodiment of the present invention produces electricity
Road can be 1 times by lower power consumption, so as to both ensure that output voltage Vout output area, and carries on the basis of existing technology
The high conversion efficiency of voltage generation circuit, reduce power consumption.
Fig. 5 shows the structural representation of voltage transformation module in Fig. 3.
As shown in figure 5, the voltage transformation module 1320 of the embodiment of the present invention include amplifier OP1, adjustment unit 1321 with
And electric capacity Cf, wherein electric capacity Cf are connected between output voltage Vout output end and ground to realize filtering and voltage stabilizing.
Amplifier OP1 be used for according to output voltage Vout (or according to a certain percentage to output voltage Vout sample obtain
Sampled voltage) and reference voltage Vref comparative result produce control signal, wherein reference voltage Vref is by output voltage Vout
Desired value determine.Positive supply voltage (the selection letter of amplifier OP1 positive feeder ear OP_P receiving voltages modular converter 1320
One of supply voltage Vp1 and Vp2 that number lowest order is indicated), amplifier OP2 negative feeder ear OP_N receiving voltage modular converters
1320 anti-phase supply voltage (one of supply voltage Vn1 and Vn2 that selection signal highest order is indicated).Control signal is included by putting
First control signal ctl1 of big device OP1 the first output end output and the second control signal exported by the second output end
ctl2.Amplifier OP1 is, for example, AB class error amplifiers.
As a kind of specific embodiment, amplifier OP1 positive feeder ear is connected with one end of multi-channel switch module, multichannel
Switch element is under selection signal lowest order sel [0] control by amplifier OP1 positive feeder ear OP_P and first group of feeder ear
In one conducting so that the positive supply voltage of amplifier OP1 positive feeder ear receiving voltage modular converter 1320；Amplifier
OP1 negative feeder ear is connected with one end of another multi-channel switch module, and multi-channel switch module is in selection signal highest order sel [1]
Control under by one in amplifier OP1 negative feeder ear OP_N and second group of feeder ear conducting so that amplifier OP1's is negative
The anti-phase supply voltage of feeder ear receiving voltage modular converter 1320.
Adjustment unit 1321 includes the first adjustment unit 1321a and the second adjustment unit 1321b.
First adjustment unit 1321a turn-on and turn-off are controlled by the first control signal ctl2, the first adjustment unit 1321a
Positive adjustment electric current Ip is provided in conducting, positive adjustment electric current Ip acts on the load of voltage generation circuit 1300 to produce
Output voltage Vout more than or equal to 0.First adjustment unit 1321a receives the lowest order sel [0] of selection signal, to select to supply
One of piezoelectric voltage Vp1 and Vp2 as voltage transformation module 1320 positive supply voltage, and using the positive supply voltage produce
Positive adjustment electric current Ip.
Second adjustment unit 1321b turn-on and turn-off are controlled by the second control signal ctl2, the second adjustment unit 1321b
Anti-phase adjustment electric current In is provided in conducting, the anti-phase adjustment electric current In acts on the load of voltage generation circuit 1300 to produce
Output voltage Vout less than 0.Second adjustment unit 1321b receives the highest order sel [1] of selection signal, to select power supply electricity
One of Vn1 and Vn2 are pressed as the anti-phase supply voltage of voltage transformation module 1320, and it is anti-phase using anti-phase supply voltage generation
Adjust electric current In.
Fig. 6 a show a kind of schematic diagram for realizing structure of the first adjustment unit in Fig. 5.
As shown in Figure 6 a, the first adjustment unit 1321a includes selecting switch K1 and is connected on supply voltage Vp1 and Vp2
Between transistor MP1 and MP2.Selecting switch K1 first end receives the first control signal ctl1, two of selecting switch K1
Control end, the transistor MP2 control end of second end respectively with transistor MP1 are connected.Transistor MP1 and MP2 common port to
The output end that voltage generation circuit 1300 is used to provide output voltage Vout is connected.
Selecting switch K1 is controlled by the lowest order sel [0] of selection signal, such as when the lowest order sel [0] of selection signal is
During the first level, transistor MP1 control end is connected so that transistor by selecting switch K1 with amplifier OP1 the first output end
MP1 realizes turn-on and turn-off under the first control signal ctl1 control, when transistor MP1 is turned on, the first adjustment unit
1321a produces positive adjustment electric current Ip according to supply voltage Vp1；When the lowest order sel [0] of selection signal is second electrical level,
Transistor MP2 control end is connected by selecting switch K1 with amplifier OP1 the first output end so that transistor MP2 is in the first control
Turn-on and turn-off are realized under signal ctl1 processed control, when transistor MP2 is turned on, the first adjustment unit 1321a is according to power supply
Voltage Vp2 produces positive adjustment electric current Ip.
Specifically, transistor MP1 and transistor MP2 is, for example, p channel transistor.
Fig. 6 b show another schematic diagram for realizing structure of the first adjustment unit in Fig. 5.
As shown in Figure 6 b, the first adjustment unit 1321a includes selecting switch K2 and transistor MP0.The of selecting switch K2
One end is connected with transistor MP0 the first path terminal, selecting switch K2 two the second ends receive respectively supply voltage Vp1 and
Vp2.Transistor MP0 control end is connected to receive the first control signal ctl1 with amplifier OP1 the first output end.
Selecting switch K2 is controlled by the lowest order sel [0] of selection signal, such as when the lowest order sel [0] of selection signal is
During the first level, selecting switch K2 makes transistor MP0 the first path terminal receive supply voltage Vp1, when transistor MP0 is first
When being turned under control signal ctl1 control, the first adjustment unit 1321a produces positive adjustment electric current according to supply voltage Vp1
Ip；When the lowest order sel [0] of selection signal is second electrical level, selecting switch K2 makes transistor MP0 the first path terminal receive
Supply voltage Vp2, when being turned under controls of the transistor MP0 in the first control signal ctl1, the first adjustment unit 1321a according to
Supply voltage Vp2 produces positive adjustment electric current Ip.
Specifically, transistor MP0 is, for example, p channel transistor.
Fig. 7 a show a kind of schematic diagram for realizing structure of the second adjustment unit in Fig. 5.
As shown in Figure 7a, the second adjustment unit 1321b includes selecting switch K3 and is connected on supply voltage Vn1 and Vn2
Between transistor MN1 and MN2.Selecting switch K3 first end receives the second control signal ctl2, two of selecting switch K3
Control end, the transistor MN2 control end of second end respectively with transistor MN1 are connected.Transistor MN1 and MN2 common port to
The output end that voltage generation circuit 1300 is used to provide output voltage Vout is connected.
Selecting switch K3 is controlled by the highest order sel [1] of selection signal, such as when the highest order sel [1] of selection signal is
During the first level, transistor MN1 control end is connected so that transistor by selecting switch K3 with amplifier OP1 the second output end
MN1 realizes turn-on and turn-off under the second control signal ctl2 control, when transistor MN1 is turned on, the second adjustment unit
1321b produces anti-phase adjustment electric current according to supply voltage Vn1；When the highest order sel [1] of selection signal is second electrical level,
Transistor MN2 control end is connected by selecting switch K3 with amplifier OP1 the second output end so that transistor MN2 is in the second control
Turn-on and turn-off are realized under signal ctl2 processed control, when transistor MN2 is turned on, the second adjustment unit 1321b is according to power supply
Voltage Vn2 produces anti-phase adjustment electric current In.
Specifically, transistor MN1 and transistor MN2 is, for example, N-channel transistor.
Fig. 7 b show another schematic diagram for realizing structure of the second adjustment unit in Fig. 5.
As shown in Figure 7b, the second adjustment unit 1321b includes selecting switch K4 and transistor MN0.The of selecting switch K4
One end is connected with transistor MN0 the first path terminal, selecting switch K4 two the second ends receive respectively supply voltage Vn1 and
Vn2.Transistor MN0 control end is connected to receive the second control signal ctl2 with amplifier OP1 the second output end.
Selecting switch K4 is controlled by the highest order sel [1] of selection signal, such as when the highest order sel [1] of selection signal is
During the first level, selecting switch K4 makes transistor MN0 the first path terminal receive supply voltage Vn1, when transistor MN0 is second
When being turned under control signal ctl2 control, the second adjustment unit 1321b produces anti-phase adjustment electric current according to supply voltage Vn1
In；When the highest order sel [1] of selection signal is second electrical level, selecting switch K4 makes transistor MN0 the first path terminal receive
Supply voltage Vn2, when being turned under controls of the transistor MN0 in the second control signal ctl2, the second adjustment unit 1321b according to
Supply voltage Vn2 produces anti-phase adjustment electric current In.
Specifically, transistor MN0 is, for example, N-channel transistor.
In summary, compared with prior art, the beneficial effects of the invention are as follows compared with prior art, the present invention is implemented
The voltage generation circuit and supply unit of example are selected the supply voltage of voltage generation circuit according to the desired value of output voltage
Select and switch, both ensure that the adjustable extent of the output voltage of voltage generation circuit, voltage generation circuit has been obviously improved again
Conversion efficiency, system power dissipation is reduced, so as to extend the working time of system, realize power saving design.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operating
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability is included, so that process, article or equipment including a series of key elements not only include those key elements, and
Also include other key elements being not expressly set out, or also include for this process, article or the intrinsic key element of equipment.
In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including the key element
Process, article or equipment in also there is other identical element.
According to embodiments of the invention as described above, these embodiments do not have all details of detailed descriptionthe, not yet
It is only described specific embodiment to limit the invention.Obviously, as described above, it can make many modifications and variations.This explanation
Book is chosen and specifically describes these embodiments, is in order to preferably explain the principle and practical application of the present invention, so that affiliated
Technical field technical staff can be used using modification of the invention and on the basis of the present invention well.
Claims (11)
1. a kind of voltage generation circuit, it is used to provide the output voltage with adjustable extent, it is characterised in that the voltage production
Raw circuit includes：
At least three feeder ears, at least three feeder ear is divided into first group of feeder ear and second group of feeder ear, described first
Each feeder ear that each feeder ear in group feeder ear is used to provide in the first different supply voltages, second group of feeder ear is used
In the second different supply voltages of offer；
Control module, it is used to produce selection signal according to the desired value of the output voltage；
Voltage transformation module, it is optionally connected to connect according to the selection signal with one in first group of feeder ear
Corresponding first supply voltage is received, and is connected with one in second group of feeder ear with reception corresponding described the
Two supply voltages, and the output voltage is produced according to first supply voltage received and second supply voltage.
2. voltage generation circuit according to claim 1, it is characterised in that the voltage transformation module includes：
Adjustment unit, it optionally receives one of the multiple first supply voltage and the multiple according to the selection signal
One of second supply voltage, and by first supply voltage received in the presence of control signal or described in receiving
Second supply voltage is converted into the output voltage；
Amplifier, its inverting input receives the reference voltage set according to the desired value of the output voltage, the input of its positive
End receives the output voltage or obtained sampled voltage of being sampled according to setting ratio to the output voltage, and its output end is provided
The control signal, its positive feeder ear optionally receives one of described first supply voltage according to the selection signal, and it is born
Feeder ear optionally receives one of described second supply voltage according to the selection signal.
3. voltage generation circuit according to claim 2, it is characterised in that each described in first group of feeder ear
Each feeder ear that first supply voltage that feeder ear is provided is more than or equal in 0, second group of feeder ear is provided
Second supply voltage be less than 0.
4. voltage generation circuit according to claim 3, it is characterised in that it is defeated that the output end of the amplifier includes first
Go out end and the second output end, the control signal includes the first control signal exported by first output end and by described
Second control signal of the second output end output,
The adjustment unit includes：
First adjustment unit, it is used to optionally with one in first group of feeder ear be connected according to the selection signal
To receive corresponding first supply voltage, the opening and closing of first adjustment unit are controlled by the first control letter
Number, when first adjustment unit is opened, the output end of first adjustment unit provides positive adjustment electric current；
Second adjustment unit, it is used to optionally with one in second group of feeder ear be connected according to the selection signal
To receive corresponding second supply voltage, the opening and closing of second adjustment unit are controlled by the second control letter
Number, when second adjustment unit is opened, the output end of second adjustment unit provides anti-phase adjustment electric current,
The positive adjustment electric current or the anti-phase adjustment function of current produce the output voltage in load.
5. voltage generation circuit according to claim 4, it is characterised in that first adjustment unit includes：
Multiple the first transistors, the first path terminal of each the first transistor respectively with first group of feeder ear
Each feeder ear be connected, the alternate path end of the multiple the first transistor is interconnected to be used as first adjustment unit
Output end；
First choice switch, for according to the selection signal optionally by the control end of one of the multiple the first transistor
It is connected with the first output end of the amplifier.
6. voltage generation circuit according to claim 4, it is characterised in that first adjustment unit includes：
The first transistor, the control end of the first transistor is connected with the second output end of the amplifier, and described first is brilliant
First path terminal of body pipe as first adjustment unit output end；
Second selecting switch, for according to the selection signal optionally by the alternate path end of the first transistor and institute
One in first group of feeder ear is stated to be connected to receive corresponding first supply voltage.
7. the voltage generation circuit according to any one of claim 5 or 6, it is characterised in that the first transistor is P ditches
Road transistor.
8. voltage generation circuit according to claim 4, it is characterised in that second adjustment unit includes：
Multiple second transistors, the first path terminal of each second transistor respectively with second group of feeder ear
Each feeder ear be connected, the alternate path end of the multiple second transistor is interconnected to be used as second adjustment unit
Output end,
3rd selecting switch, for according to the selection signal optionally by the control end of one of the multiple second transistor
It is connected with the second output end of the amplifier.
9. voltage generation circuit according to claim 4, it is characterised in that second adjustment unit includes：
Second transistor, the control end of the second transistor is connected with the second output end of the amplifier, and described second is brilliant
First path terminal of body pipe as second adjustment unit output end；
4th selecting switch, for according to the selection signal optionally by the alternate path end of the second transistor and institute
One in second group of feeder ear is stated to be connected to receive corresponding second supply voltage.
10. the voltage generation circuit according to any one of claim 8 or 9, it is characterised in that the second transistor is N
Channel transistor.
11. a kind of supply unit, it is characterised in that including：
Battery, for providing supply voltage；
Voltage generation circuit as described in any one of claim 1 to 10, the multiple feeder ear of the voltage generation circuit
A variety of supply voltages are received respectively to produce the output voltage；And
Power supply circuit, for producing the first different supply voltage and the second different supply voltage.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710398070.0A CN107024955B (en) | 2017-05-31 | 2017-05-31 | Voltage generating circuit and power supply device |
| KR1020170083046A KR101971222B1 (en) | 2017-05-31 | 2017-06-30 | Voltage generating circuit and power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710398070.0A CN107024955B (en) | 2017-05-31 | 2017-05-31 | Voltage generating circuit and power supply device |
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| Publication Number | Publication Date |
|---|---|
| CN107024955A true CN107024955A (en) | 2017-08-08 |
| CN107024955B CN107024955B (en) | 2019-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710398070.0A Active CN107024955B (en) | 2017-05-31 | 2017-05-31 | Voltage generating circuit and power supply device |
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| Country | Link |
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| KR (1) | KR101971222B1 (en) |
| CN (1) | CN107024955B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11543916B2 (en) * | 2021-02-17 | 2023-01-03 | Himax Technologies Limited | Driver circuit for driving display panel having touch sensing function |
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| JPH08242537A (en) * | 1994-12-16 | 1996-09-17 | Sgs Thomson Microelectron Sa | Circuit for selecting supply voltage for voltage regulator |
| CN1150091A (en) * | 1995-07-18 | 1997-05-21 | 葛拉夫狄克株式会社 | Thermal head and head drive circuit therefor |
| CN101162866A (en) * | 2006-10-09 | 2008-04-16 | 思柏科技股份有限公司 | Adjustable variant electric voltage voltage-stabilizing device |
| CN102855856A (en) * | 2012-08-30 | 2013-01-02 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal display and driving method for eliminating Mura thereof |
| CN104914906A (en) * | 2014-01-10 | 2015-09-16 | 雅达电子国际有限公司 | Control circuits and methods for regulating output voltages using multiple and/or adjustable reference voltages |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4643954B2 (en) * | 2004-09-09 | 2011-03-02 | ルネサスエレクトロニクス株式会社 | Gradation voltage generation circuit and gradation voltage generation method |
| KR102307725B1 (en) * | 2015-01-30 | 2021-10-01 | 엘지디스플레이 주식회사 | Apparatus for generating gray scale voltage and apparatus for driving data for display and display apparatus comprising the same |
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2017
- 2017-05-31 CN CN201710398070.0A patent/CN107024955B/en active Active
- 2017-06-30 KR KR1020170083046A patent/KR101971222B1/en active IP Right Grant
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08242537A (en) * | 1994-12-16 | 1996-09-17 | Sgs Thomson Microelectron Sa | Circuit for selecting supply voltage for voltage regulator |
| CN1150091A (en) * | 1995-07-18 | 1997-05-21 | 葛拉夫狄克株式会社 | Thermal head and head drive circuit therefor |
| CN101162866A (en) * | 2006-10-09 | 2008-04-16 | 思柏科技股份有限公司 | Adjustable variant electric voltage voltage-stabilizing device |
| CN102855856A (en) * | 2012-08-30 | 2013-01-02 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal display and driving method for eliminating Mura thereof |
| CN104914906A (en) * | 2014-01-10 | 2015-09-16 | 雅达电子国际有限公司 | Control circuits and methods for regulating output voltages using multiple and/or adjustable reference voltages |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US11543916B2 (en) * | 2021-02-17 | 2023-01-03 | Himax Technologies Limited | Driver circuit for driving display panel having touch sensing function |
| TWI811977B (en) * | 2021-02-17 | 2023-08-11 | 奇景光電股份有限公司 | Driver circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101971222B1 (en) | 2019-04-22 |
| CN107024955B (en) | 2019-12-24 |
| KR20180131304A (en) | 2018-12-10 |
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