CN104765401B - A kind of utilization load change signal adjusts the device of power device - Google Patents
A kind of utilization load change signal adjusts the device of power device Download PDFInfo
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- CN104765401B CN104765401B CN201510141862.0A CN201510141862A CN104765401B CN 104765401 B CN104765401 B CN 104765401B CN 201510141862 A CN201510141862 A CN 201510141862A CN 104765401 B CN104765401 B CN 104765401B
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Abstract
The present invention relates to the device that a kind of utilization load change signal adjusts power device, including load and amplifier, also include current source, the current source includes impulse generator, votage control switch and current generating unit, impulse generator is used to produce pulse signal according to load change signal, pulse signal is used for the control end for controlling votage control switch, one end ground connection of current generating unit, the input of another termination votage control switch, between the output end connection of votage control switch and load and amplifier, current generating unit produces corresponding electric current Ib_a according to load change signal.The technical problem of power output can only be adjusted alone by amplifier in order to solve existing linear voltage regulator, the pulse signal that the present invention is produced using the control signal Vsw (x) during load switching, the transient response of amplifier speed of linear regulator circuit can be made to switch with load and change, the demand of transient response speed change of the system when loading switching pair can be met.
Description
Technical field
It is especially a kind of to adjust power device using load change signal to strengthen linearly surely the present invention relates to chip field
The device of depressor transient response speed.
Background technology
Referring to Fig. 1, existing linear voltage regulator controls power output device by amplifier, burning voltage is exported, not
With under loading condition, by adjusting power output device, it can be ensured that the constant magnitude of voltage Vout of output, and it can guarantee that certain
Current output capability, R0 and R1 are respectively different loading conditions, and corresponding output current is I0 and I1, Vsw are different loads
The control signal of switching.
In the range of existing linear voltage regulator fan-out capability, i.e., when amplifier and loop work are in normal range (NR), line
Property voltage-stablizer transient response speed and bias current Ib keep proportional relation, when bias current Ib is constant, linear voltage regulator
Transient response it is constant, when switching between different loads, linear voltage regulator system needs certain reaction time regulation output
Power device, therefore Voltage Drop or overshoot can be produced.
However, existing linear voltage regulator can only adjust power output device alone by amplifier, different loads it
Between when switching, existing linear voltage regulator can not carry out the need of the transient response speed change of adaptive system pair with the switching of load
Ask.
The content of the invention
The technical problem of power output, this hair can only be adjusted alone by amplifier in order to solve existing linear voltage regulator
It is bright to provide a kind of utilization load change signal regulation power device to strengthen the device of linear voltage regulator transient response speed.
The technical solution of the present invention：
A kind of utilization load change signal adjusts the linear voltage regulator of power device, including load and amplifier, and its is special
Part is：Also include current source, the current source includes impulse generator, votage control switch and current generating unit, the arteries and veins
Rushing generator is used to produce pulse signal according to load change signal, and pulse signal is used for the control end for controlling votage control switch, institute
One end ground connection of current generating unit is stated, the input of another termination votage control switch, the output end of the votage control switch is connected to
Between load and amplifier,
The current generating unit produces corresponding electric current Ib_a according to load change signal.
A kind of utilization load change signal adjusts the linear voltage regulator of power device, including at least two loads and amplification
Device, it is characterized in that：Also include current source, the current source includes controller, impulse generator, votage control switch and electric current
Generation unit, the controller is used to be overlapped at least two load change signals the total load change signal of processing output
To impulse generator；The impulse generator is used to produce pulse signal according to total load change signal, and pulse signal is used for
The control end of votage control switch is controlled, one end ground connection of the current generating unit, the input of another termination votage control switch is described
The output end of votage control switch is connected between load and amplifier, and the current generating unit is according to load change signal generation pair
The electric current Ib_a answered.
Above-mentioned current generating unit includes resistance Ra.
A kind of utilization load change signal adjusts the linear voltage regulator of power device, including load and amplifier, and its is special
Part is：Also include current source, the current source includes impulse generator and metal-oxide-semiconductor Ma, and the impulse generator is used to bear
Carry variable signal and produce pulse signal, pulse signal is used for the grid end for controlling metal-oxide-semiconductor Ma, the source ground connection of the metal-oxide-semiconductor Ma, institute
The drain terminal for stating metal-oxide-semiconductor Ma is connected between load and amplifier.
A kind of utilization load change signal adjusts the linear voltage regulator of power device, including at least two loads and amplification
Device, it is characterized in that：Also include current source, the current source includes controller, impulse generator and metal-oxide-semiconductor Ma, described
Controller is used at least two load change signals are overlapped to handle to export total load change signal to impulse generator；
The impulse generator is used to produce pulse signal according to total load change signal, and pulse signal is used to control metal-oxide-semiconductor Ma's
Grid end, the source ground connection of the metal-oxide-semiconductor Ma, the drain terminal of the metal-oxide-semiconductor Ma is connected between load and amplifier.
Advantage for present invention：
A kind of utilization load change signal that the present invention is provided adjusts the current source of power device, when being switched using load
The pulse signal that control signal Vsw (x) is produced, can be such that the transient response of amplifier speed of linear regulator circuit is cut with load
Change and change, can meet system load switching when pair transient response speed change demand, while not born in system
The consumption of quiescent current is not increased when carrying switching.
Brief description of the drawings
Fig. 1 is existing linear voltage regulator structural representation；
Fig. 2 is the structure principle chart of the present invention；
Fig. 3 is the relation schematic diagram between the impulse generator input of the present invention and output；
Fig. 4 is the structure principle chart of the embodiment of the present invention one；
Fig. 5 is the structure principle chart of the embodiment of the present invention two；
Fig. 6 is the structure principle chart of the embodiment of the present invention three.
Embodiment
Referring to Fig. 2 and Fig. 3, the transient response speed of linear voltage regulator depends on current source with negative with the variation pattern of load
The mode of switching change is carried, the current source that the present invention is used uses the electric current Ib_a with load switching, therefore the bias current sources
It can be configured according to the condition of load switching, configurable bigger pulse width Tp when load switching amplitude is larger, or
Bigger bias current Ib_a.For example：If loading R0 and R1 difference plurality magnitudes, that is, the load current I0 and I1 phases exported
When difference is larger, Ib_a can be improved, or make it that the pulse width Tp times are longer, or make it that Vsw impulse amplitudes are bigger, greatly
Lift transient response speed, it is ensured that output Vout more stablizes, to meet the demand of system.Fast transient is not being needed to ring simultaneously
Make bias current Ib constant under the hot environment for answering speed or reduce so that transient response speed is more steady under different voltages
It is fixed, or reach the effect for saving energy consumption.Ib_a can be positively or negatively electric current, and the sense of current is changed into underloading according to load from heavy duty
Or heavily loaded decision is changed into from underloading.
Referring to Fig. 4, embodiments of the invention one are to produce the control of corresponding pulses signal using single load switching signal Vsw
Votage control switch, electric current Ib_a is obtained using resistance Ra, Ib_a is equal to resistance Ra both end voltages divided by resistance, by voltage-controlled
Switch to realize the current source in the present invention.Wherein current source includes impulse generator, votage control switch, resistance, the current source
Pass sequentially through votage control switch, access amplifier output power device.Votage control switch, resistance and impulse generator are existing units.
Referring to Fig. 5, embodiments of the invention two are to produce the control of corresponding pulses signal using single load switching signal Vsw
Metal-oxide-semiconductor Ma, electric current Ib_a, Ib_a are obtained using metal-oxide-semiconductor Ma and is equal to the electric current for flowing through metal-oxide-semiconductor Ma, this is realized by metal-oxide-semiconductor
Current source in invention.Wherein current source includes impulse generator, metal-oxide-semiconductor, and the current source passes sequentially through metal-oxide-semiconductor, access and put
Big device power output device.Metal-oxide-semiconductor can be N-type or p-type, and impulse generator is existing unit.
Referring to Fig. 6, embodiments of the invention three are that multiple load switching signal Vsw (x) pass through controller and pulse generation
Device produces pulse signal control votage control switch, loads switching signal by controller come the pulse width Tp of control wave,
Using electric current Ib_a is obtained, Ib_a is equal to resistance Ra both end voltages divided by resistance, this hair realized by votage control switch
Current source in bright.
It is NMOS tube or PMOS that metal-oxide-semiconductor in above example, which is used,.
Claims (5)
1. a kind of utilization load change signal adjusts the device of power device, including load and amplifier, it is characterised in that：Also wrap
Current source is included, the current source can configure corresponding pulse width Tp according to load switching amplitude；The current source includes pulse
Generator, votage control switch and current generating unit, the impulse generator are used to produce pulse signal according to load change signal,
Pulse signal is used for the control end for controlling votage control switch, one end ground connection of the current generating unit, another termination votage control switch
Input, the output end of the votage control switch is connected between load and amplifier,
The current generating unit produces corresponding electric current Ib_a according to load change signal.
2. a kind of utilization load change signal adjusts the device of power device, including at least two loads and amplifier, its feature
It is：Also include current source, the current source includes controller, impulse generator, votage control switch and current generating unit, described
Controller is used at least two load change signals are overlapped to handle to export total load change signal to impulse generator；
The impulse generator is used to produce pulse signal according to total load change signal, and pulse signal is used to control votage control switch
Control end, one end ground connection of the current generating unit, the input of another termination votage control switch, the output of the votage control switch
End is connected between load and amplifier, and the current generating unit produces corresponding electric current Ib_a according to load change signal.
3. a kind of utilization load change signal according to claim 1 or 2 adjusts the device of power device, its feature exists
In：The current generating unit includes resistance Ra.
4. a kind of utilization load change signal adjusts the device of power device, including load and amplifier, it is characterised in that：Also wrap
Current source is included, the current source can configure corresponding pulse width Tp according to load switching amplitude；The current source includes pulse
Generator and metal-oxide-semiconductor Ma, the impulse generator are used for load change signal and produce pulse signal, and pulse signal is used to control
Metal-oxide-semiconductor Ma grid end, the source ground connection of the metal-oxide-semiconductor Ma, the drain terminal of the metal-oxide-semiconductor Ma is connected between load and amplifier.
5. a kind of utilization load change signal adjusts the device of power device, including at least two loads and amplifier, its feature
It is：Also include current source, the current source includes controller, impulse generator and metal-oxide-semiconductor Ma, and the controller is used for extremely
Few two load change signals are overlapped processing and export total load change signal to impulse generator；The impulse generator
For producing pulse signal according to total load change signal, pulse signal is used for the grid end for controlling metal-oxide-semiconductor Ma, the metal-oxide-semiconductor
Ma source ground connection, the drain terminal of the metal-oxide-semiconductor Ma is connected between load and amplifier.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510141862.0A CN104765401B (en) | 2015-03-27 | 2015-03-27 | A kind of utilization load change signal adjusts the device of power device |
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| CN201510141862.0A CN104765401B (en) | 2015-03-27 | 2015-03-27 | A kind of utilization load change signal adjusts the device of power device |
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| CN104765401A CN104765401A (en) | 2015-07-08 |
| CN104765401B true CN104765401B (en) | 2017-08-22 |
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| CN110858081A (en) * | 2018-08-23 | 2020-03-03 | 紫光同芯微电子有限公司 | Simple and effective transient enhancement type LDO circuit |
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| JP3803107B2 (en) * | 1994-08-04 | 2006-08-02 | 株式会社ルネサステクノロジ | Semiconductor device and power supply voltage generation circuit |
| JP2005011280A (en) * | 2003-06-23 | 2005-01-13 | Rohm Co Ltd | Power supply circuit |
| US7728565B2 (en) * | 2007-11-12 | 2010-06-01 | Itt Manufacturing Enterprises, Inc. | Non-invasive load current sensing in low dropout (LDO) regulators |
| US8169202B2 (en) * | 2009-02-25 | 2012-05-01 | Mediatek Inc. | Low dropout regulators |
| KR101620345B1 (en) * | 2009-04-07 | 2016-05-12 | 삼성전자주식회사 | LDO regulator and semiconductor device having the same |
| CN102290806B (en) * | 2011-08-24 | 2013-11-27 | 北京经纬恒润科技有限公司 | LDO (Low Dropout Output) overvoltage protective circuit and LDO (Low Dropout Output) using same |
| CN103105883A (en) * | 2011-11-11 | 2013-05-15 | 中国科学院微电子研究所 | Linear voltage regulator with load detection circuit and dynamic zero compensation circuit |
| CN103383581B (en) * | 2012-05-04 | 2016-05-25 | 瑞昱半导体股份有限公司 | A voltage regulator with transient response enhancement mechanism |
| CN103558891B (en) * | 2013-09-22 | 2016-03-30 | 龙芯中科技术有限公司 | Low-dropout regulator |
| CN104199504B (en) * | 2014-09-28 | 2017-03-29 | 苏州晶为微电子有限公司 | A kind of fast transient response low pressure difference linear voltage regulator |
| CN204576337U (en) * | 2015-03-27 | 2015-08-19 | 西安华芯半导体有限公司 | A kind of device utilizing load change signal regulating power device |
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Address after: 710055 Shaanxi City, Xi'an province high tech Road No. 38, innovation center, A, block, floor 4 Applicant after: XI'AN UNIIC SEMICONDUCTORS Co.,Ltd. Address before: 710055 Shaanxi City, Xi'an province high tech Road No. 38, innovation center, A, block, floor 4 Applicant before: Xi'an Sinochip Semiconductors Co., Ltd. |
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