CN103354419B - Based on fully integrated compensating network on the sheet of constant transconductance amplifier and capacitor multiflier - Google Patents
Based on fully integrated compensating network on the sheet of constant transconductance amplifier and capacitor multiflier Download PDFInfo
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- CN103354419B CN103354419B CN201310208472.1A CN201310208472A CN103354419B CN 103354419 B CN103354419 B CN 103354419B CN 201310208472 A CN201310208472 A CN 201310208472A CN 103354419 B CN103354419 B CN 103354419B
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Abstract
The present invention discloses a kind of based on fully integrated compensating network on the sheet of constant transconductance amplifier and capacitor multiflier, can flexible Application in TYPE-I, TYPE-II and TYPE-III type compensating network structure of switch DC-DC converter; Comprise impedance Z
1, impedance Z
2with operational amplifier A MP; Impedance Z
1input termination input voltage V
in, impedance Z
1the first input end of output termination operational amplifier A MP; Impedance Z
2the first input end of input termination operational amplifier A MP, impedance Z
2the output of output termination operational amplifier A MP; The second input termination reference voltage V of operational amplifier A MP
ref.The present invention is by adopting constant transconductance amplifier as active pull-up, and capacitor multiflier, as active capacitor, instead of conventional compensation network middle impedance Z
1and impedance Z
2the discrete devices such as the passive resistance adopted and electric capacity, achieve on sheet integrated, improve level of integrated system; On this sheet, fully integrated compensating network structure is simple, is easy to design, has excellent anti-process corner stability; Design has versatility, is convenient to promote and expansion.
Description
Technical field
The present invention relates to semiconductor integrated circuit and DC-DC converter field, be specifically related to a kind of be applied to switch DC-DC converter based on fully integrated compensating network on the sheet of constant transconductance amplifier and capacitor multiflier.
Background technology
In recent decades, under the promotion of semiconductor industry develop rapidly, portable consumer electronics product plays more and more important role in the modern life, and switch DC-DC converter is widely used along with the development of portable consumer electronics product.In conjunction with the development trend of electronic product, switch DC-DC converter is widely used among integrated circuit.
In the design of switch DC-DC converter, need to add compensating network to ensure system stability.According to the difference of switch DC-DC converter control model and object, the compensating network type required for system and zero pole point number are not identical yet, and therefore compensating network also has various ways, and system can select suitable compensating network type according to own characteristic.Generally speaking, compensating network comprises impedance Z
1, impedance Z
2with operational amplifier A MP.If Z
1be a resistance, Z
2be the parallel connection of a resistance and an electric capacity, compensating network is the single pole compensation network (TYPE-I) with bandwidth gain restriction, and it can provide one to compensate limit.If Z
1be a resistance, Z
2be after a resistance and a capacitances in series again with a Capacitance parallel connection, compensating network is first order pole-simple zero compensating network (TYPE-II), it one can be provided to compensate limit and one compensate zero point.TYPE-III type compensating network can provide two to compensate zero point, and it is divided into again two kinds according to system bandwidth: if system bandwidth≤500kHz, then the zero point of parasitic series resistance ESR introducing, far away outside system bandwidth, can ignore, now Z
1be the parallel connection of a resistance and an electric capacity, Z
2be a resistance and a capacitances in series, compensating network is duopole-bis-zero compensation network (TYPE-III (a)), and it can provide two to compensate limits and two and compensate zero point; If system bandwidth >500kHz, then must consider the zero point that ESR introduces, now Z
1be the parallel connection of a resistance and an electric capacity, Z
2be after a resistance and a capacitances in series again with a Capacitance parallel connection, compensating network is three limits-bis-zero compensation network (TYPE-III (b)), it three can be provided to compensate limits and two compensate zero point.
Traditional switch DC-DC converter compensating network is made up of operational amplifier and passive resistance, electric capacity.In order to ensure precision, passive resistance and electric capacity adopt the outer discrete device of sheet to realize usually, and this adds increased the area of pcb board and the I/O number of chip, the development trend fully integrated with switch DC-DC converter is disagreed.If the compensating network that a kind of method can be found to be formed by traditional passive element, the basis meeting stability requirement realizes on sheet fully integrated, very important practical application and promotional value will be had.
For the design of compensating network fully integrated on sheet, current newest research results has: in integrated capacitance, 2005 Taiwan university of communications (NCTU) Chia-JungChang with Ke-HorngChen achieve the capacitor multiflier that both-end is connected current-mode, reduce capacitance required in compensation.In resistance, in the solid-state circuit periodical (JSSC) of 2002, AnandVeeravalli analyzes how to realize little and constant operational transconductance amplifier, but does not have consideration to it can be used as resistance to be applied in compensating network.The Wu of Hong Kong University of Science and Thchnology in 2010 proposes a kind of novel Pseudo-TypeIII and compensates, the TYPE-III type compensating network that traditional discrete device is formed is split as low pass and high pass two parts combination realization, the structure of compensating network proposes new method for designing.2011 Korea Advanced Institute of Science and Technology (KAIST) Hyun-HeePark utilize four OTA to replace conventional P-Controller, I-Controller and D-Controller, achieve a kind of fully integrated broadband P ID and compensate.But design circuit is complicated, and area occupied is relatively large, and very flexible, there is certain limitation.Domestic aspect is also in blank about the design studies of fully integrated compensating network.
Summary of the invention
The object of the invention is to the shortcoming adopting the outer discrete component of sheet to realize for traditional switch DC-DC converter compensating network, propose a kind of be applicable to TYPE-I, TYPE-II and TYPE-III type compensating network structure based on fully integrated compensating network on the sheet of constant transconductance amplifier and capacitor multiflier.
Active device is applied to compensating network by the present invention, specific implementation the active pull-up module based on constant transconductance amplifier and the active capacitor module based on capacitor multiflier.By changing the transconductance value of constant transconductance, change the resistance of active pull-up neatly, by changing multiplication factor and the reference capacitance of capacitor multiflier, change the capacitance of active capacitor neatly, thus provide suitable offset zero limit for system, to offset the impact of zero pole point in major loop, ensure the stable of system, simultaneously the dynamic indicator of all right corrective system.Integrated on the sheet that the present invention had both achieved compensating network, improve level of integrated system, again there is versatility, be convenient to promote and expansion.Structure of the present invention is simple, is easy to design, has excellent anti-process corner stability feature.
Be employed herein operational transconductance amplifier to realize active pull-up module R
a, as shown in Figure 1.Utilize operational transconductance amplifier to be a voltage-controlled current source, its output is connected with reverse input end formation positive resistance.Active pull-up module has two port V
i, I
o, port V
i, I
oconnect positive input and the output of operational transconductance amplifier respectively.The transconductance value g of operational transconductance amplifier
mnamely an active pull-up is achieved
and active electrical resistance can by changing transconductance value g
mcontrol.
Be employed herein the capacitor multiflier of both-end connection to realize active capacitor module C
a, as shown in Figure 2.It comprises load capacitance Cz, operational amplifier A MP1, operational amplifier A MP2, NMOS tube 11, NMOS tube 12, NMOS tube K1 and NMOS tube K2; Active capacitor module symmetry is arranged; The grid of NMOS tube 11 is connected with the grid of NMOS tube K1, and the drain electrode of NMOS tube 11 is connected with the drain electrode of NMOS tube K1, and the source electrode of NMOS tube K1 connects the output of operational amplifier A MP1, its first input end of output termination of operational amplifier A MP1; The source electrode of NMOS tube 11 connects second input of operational amplifier A MP1 and one end of load capacitance Cz; Second input of other end concatenation operation amplifier AMP2 of load capacitance Cz and the source electrode of NMOS tube 12; The grid of NMOS tube 12 connects the grid of NMOS tube K2, and the drain electrode of NMOS tube 12 connects the drain electrode of NMOS tube K2, and the source electrode of NMOS tube K2 connects the output of operational amplifier A MP2, its first input end of output termination of operational amplifier A MP2; Operational amplifier A MP1 is identical with the device parameters of operational amplifier A MP2, and NMOS tube 11 is identical with the device parameters of NMOS tube 12, and NMOS tube K1 is identical with the device parameters of NMOS tube K2; Capacitor multiflier has two ports M, N, and port M, N connect respectively, the drain electrode of NMOS tube 11 and NMOS tube 12; The grid of NMOS tube 11 is connected the reference voltage V making it normally work with the grid of NMOS tube K1, the grid of NMOS tube 12 is connected the reference voltage V making it normally work with the grid of NMOS tube K2; The breadth length ratio of NMOS tube K1 is K times of NMOS tube 11 breadth length ratio, and the breadth length ratio of NMOS tube K2 is K times of NMOS tube 12 breadth length ratio, 1≤K≤100; The capacitance of described active capacitor module is (1+K) times of load capacitance Cz capacitance.
To achieve these goals, the present invention adopts following technical scheme:
Based on a fully integrated compensating network on the sheet of constant transconductance amplifier and capacitor multiflier, comprise impedance Z
1, impedance Z
2with operational amplifier A MP; Impedance Z
1input termination input voltage V
in, impedance Z
1the first input end of output termination operational amplifier A MP; Impedance Z
2the first input end of input termination operational amplifier A MP, impedance Z
2the output of output termination operational amplifier A MP; The second input termination reference voltage V of operational amplifier A MP
ref.
The present invention further improves and is: the impedance Z of compensating network
1and impedance Z
2comprise active resistive module R
aand/or active capacitor module C
a; Described active pull-up module R
ait is the operational transconductance amplifier of a reverse input end and output short circuit; Described active pull-up module R
aresistance be
g
mfor the mutual conductance of operational transconductance amplifier; Described active capacitor module C
ait is the capacitor multiflier that a both-end connects.
The present invention further improves and is: when forming TYPE-I type compensating network (as shown in Figure 4), impedance Z
1comprise active resistive module R
a1; Active pull-up module R
a2with active capacitor module C
a1formation impedance Z in parallel
2; Described active pull-up module R
a1, active pull-up module R
a2with described active pull-up module R
astructure is identical; Active capacitor module C
a1with described active capacitor module C
astructure is identical; Active pull-up module R
a1port V
imeet input voltage V
in, active pull-up module R
a1port I
omeet port P
1; Port P
1connect the first input end of operational amplifier A MP; Active pull-up module R
a2port V
imeet the output V of operational amplifier A MP
o, active pull-up module R
a2port I
omeet port P
1; Active capacitor module C
a1port M and N meet port P respectively
1with the output V of operational amplifier A MP
o.
The present invention further improves and is: when forming TYPE-II type compensating network (as shown in Figure 5), impedance Z
1comprise active resistive module R
a1; Active pull-up module R
a2with active capacitor module C
a1series connection again with electric capacity C
2formation impedance Z in parallel
2; Described active pull-up module R
a1, active pull-up module R
a2with described active pull-up module R
astructure is identical; Active capacitor module C
a1with described active capacitor module C
astructure is identical; Active pull-up module R
a1port V
imeet input voltage V
in, active pull-up module R
a1port I
omeet port P
1; Port P
1connect the first input end of operational amplifier A MP; Active pull-up module R
a2port V
imeet the output V of operational amplifier A MP
o, active pull-up module R
a2port I
omeet port P
2; Active capacitor module C
a1port M and N meet port P respectively
1with port P
2; ESR building-out capacitor C
2be connected to port P
1with the output V of operational amplifier A MP
obetween.
The present invention further improves and is: when forming TYPE-III (a) type compensating network (as shown in Figure 6), impedance Z
1comprise active pull-up module R in parallel
a1with active capacitor module C
a1; Active pull-up module R
a2with active capacitor module C
a2impedance Z in series
2; Described active pull-up module R
a1, active pull-up module R
a2with described active pull-up module R
astructure is identical, described active capacitor module C
a1, active capacitor module C
a2with described active capacitor module C
astructure is identical; Active pull-up module R
a1port V
imeet input voltage V
in, active pull-up module R
a1port I
omeet port P
1; Active capacitor module C
a1port M and N meet input voltage V respectively
inwith port P
1; Port P
1connect the first input end of operational amplifier A MP; Active pull-up module R
a2port V
imeet the output V of operational amplifier A MP
o, active pull-up R
a2the port I of module
omeet port P
2; Active capacitor module C
a2port M and N meet port P respectively
1with port P
2.
The present invention further improves and is: when forming TYPE-III (b) type compensating network (as shown in Figure 7), impedance Z
1comprise active pull-up module R in parallel
a1with active capacitor module C
a1; Active pull-up module R
a2with active capacitor module C
a2series connection again with electric capacity C
3formation impedance Z in parallel
2; Described active pull-up module R
a1, active pull-up module R
a2with described active pull-up module R
astructure is identical, described active capacitor module C
a1, active capacitor module C
a2with described active capacitor module C
astructure is identical; Active pull-up module R
a1port V
imeet input voltage V
in, active pull-up module R
a1port I
omeet port P
1; Active capacitor module C
a1port M and N meet input voltage V respectively
inwith port P
1; Port P
1connect the first input end of operational amplifier A MP; Active pull-up module R
a2port V
imeet the output V of operational amplifier A MP
o, active pull-up module R
a2port I
omeet port P
2; Active capacitor module C
a2port M and N meet port P respectively
1with port P
2; ESR building-out capacitor C
3be connected to port P
1with the output V of operational amplifier A MP
obetween; Port P
2it is impedance Z
2inner attachment points.
The present invention further improves and is: active pull-up module R
aoutput current signal I
owith input voltage signal V
idirect proportionality, proportionality coefficient is by the mutual conductance g of operational transconductance amplifier
mdetermine.
The present invention further improves and is: active capacitor module C
acarry out equivalence to electric capacity to amplify, its multiplication factor is by amplifying metal-oxide-semiconductor breadth length ratio multiple K and reference capacitance C
zarrange, 1≤K≤100.
On the sheet that the present invention is based on constant transconductance amplifier and capacitor multiflier, fully integrated compensating network both can change the resistance of active pull-up by the transconductance value changing constant transconductance amplifier, changed the capacitance of active capacitor by the multiplication factor and reference capacitance changing capacitor multiflier, provide suitable compensation zero point for loop and compensate limit.
Active pull-up module R
athe constant transconductance value utilizing operational transconductance amplifier to provide changes input voltage signal into current signal, output current signal and input voltage signal direct proportionality.Passive resistance is namely by activeization, integrated on the sheet achieving resistance.Just the control to resistance value can be realized by the transconductance value of adjustment operational transconductance amplifier.The transconductance value of described active pull-up module directly depends on bias current, is convenient to control and regulate.On the sheet that the present invention is based on constant transconductance amplifier and capacitor multiflier, fully integrated compensating network has used two active pull-up modules, in order to ensure there is constant mutual conductance in a wide input voltage transformation range, and there is certain driving force, linearisation measure and positive resistance connected mode will be adopted when designing this two active pull-up modules.
Active capacitor module C
autilize the Miller effect small capacitances equivalence to be amplified, its multiplication factor is by amplifying metal-oxide-semiconductor breadth length ratio multiple K and reference capacitance C
zarrange (scope of K can be the arbitrary value of 1 to 100).What it is pointed out that active capacitor module of the present invention adopts is a kind of both-end connected mode, is more conducive to the popularization of active capacitor module, and is not only confined to electric capacity over the ground.
Compared to prior art, the present invention has the following advantages: fully integrated compensating network on the sheet that the present invention is based on constant transconductance amplifier and capacitor multiflier, after adopting active device to replace passive component, greatly can improve anti-process corner stability, comply with the development trend of portable product; Integrated on the sheet achieving compensating network, improve the integrated level of system; On the sheet that the present invention is based on constant transconductance and capacitor multiflier, fully integrated compensating network has more than for certain specific compensating network structure, it can flexible Application in TYPE-I, TYPE-II and TYPE-III type compensating network structure, and conveniently can regulate the resistance of active pull-up module and the capacitance of active capacitor module, have applicability widely, promotional value is large.
Accompanying drawing explanation
Fig. 1 is active pull-up module R
astructural representation;
Fig. 2 is active capacitor module C
astructural representation;
Fig. 3 be the present invention is based on constant transconductance amplifier and capacitor multiflier sheet on the structural representation of fully integrated compensating network;
Fig. 4 is the structural representation of TYPE-I type compensating network;
Fig. 5 is the structural representation of TYPE-II type compensating network;
Fig. 6 is the structural representation of TYPE-III (a) type compensating network;
Fig. 7 is the structural representation of TYPE-III (b) type compensating network.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
See Fig. 3, the present invention is a kind of based on fully integrated compensating network on the sheet of constant transconductance amplifier and capacitor multiflier, comprises impedance Z
1, impedance Z
2with operational amplifier A MP.Impedance Z
1input termination input voltage V
in, impedance Z
1the first input end of output termination operational amplifier A MP; Impedance Z
2the first input end of input termination operational amplifier A MP, impedance Z
2the output of output termination operational amplifier A MP; The second input termination reference voltage V of operational amplifier A MP
ref.
Consult shown in Fig. 1 and Fig. 2, the impedance Z in compensating network
1and impedance Z
2comprise active resistive module and/or active capacitor module; Active pull-up module R
ait is the operational transconductance amplifier (Fig. 1) of a reverse input end and output short circuit; Active capacitor module C
ait is the capacitor multiflier (Fig. 2) that a both-end connects.
What what the present invention proposed realized based on compensating network fully integrated on the sheet of constant transconductance amplifier and capacitor multiflier is that a kind of TYPE-III (b) type compensates.When forming TYPE-III (b) type compensating network, impedance Z
1comprise active pull-up module in parallel and active capacitor module; Active pull-up module and active capacitor block coupled in series form impedance Z with the Capacitance parallel connection of offsetting ESR zero point again
2.
Refer to shown in Fig. 1, active pull-up module R
ait is the operational transconductance amplifier of a reverse input end and output short circuit; It has two port V
i, I
o, port V
i, I
oconnect positive input and the output of operational transconductance amplifier respectively; Active pull-up module utilizes operational transconductance amplifier to be a voltage-controlled current source, and its output is connected with reverse input end formation positive resistance.The transconductance value g of operational transconductance amplifier
mnamely an active pull-up is achieved
and active electrical resistance can by changing transconductance value g
mcontrol.The active pull-up module of the present invention's design needs to ensure there is constant mutual conductance in a wide input voltage transformation range, and has certain driving force, will adopt linearisation measure and positive resistance connected mode when designing this two active pull-up modules.
Refer to shown in Fig. 2, active capacitor module C
acomprise load capacitance Cz, operational amplifier A MP1, operational amplifier A MP2, NMOS tube 11, NMOS tube 12, NMOS tube K1 and NMOS tube K2; Active capacitor module symmetry is arranged; The grid of NMOS tube 11 is connected with the grid of NMOS tube K1, and the drain electrode of NMOS tube 11 is connected with the drain electrode of NMOS tube K1, and the source electrode of NMOS tube K1 connects the output of operational amplifier A MP1, its first input end of output termination of operational amplifier A MP1; The source electrode of NMOS tube 11 connects second input of operational amplifier A MP1 and one end of load capacitance Cz; Second input of other end concatenation operation amplifier AMP2 of load capacitance Cz and the source electrode of NMOS tube 12; The grid of NMOS tube 12 connects the grid of NMOS tube K2, and the drain electrode of NMOS tube 12 connects the drain electrode of NMOS tube K2, and the source electrode of NMOS tube K2 connects the output of operational amplifier A MP2, its first input end of output termination of operational amplifier A MP2; Operational amplifier A MP1 is identical with the device parameters of operational amplifier A MP2, and NMOS tube 11 is identical with the device parameters of NMOS tube 12, and NMOS tube K1 is identical with the device parameters of NMOS tube K2; Capacitor multiflier has two ports M, N, and port M, N connect the drain electrode of NMOS tube 11 and NMOS tube 12 respectively; The breadth length ratio of NMOS tube K1 is K times of NMOS tube 11 breadth length ratio, and the breadth length ratio of NMOS tube K2 is K times of NMOS tube 12 breadth length ratio, 1≤K≤100; The grid of NMOS tube 11 is connected the reference voltage V making it normally work with the grid of NMOS tube K1, the grid of NMOS tube 12 is connected the reference voltage V making it normally work with the grid of NMOS tube K2; The electric capacity of described active capacitor module is (1+K) Cz, Cz is the capacitance of load capacitance.
The operation principle of active capacitor module is similar to current splitting techniques.By the clamping action of operational amplifier make its in the same way, the voltage approximately equal of reverse input end and output.Flow through like this amplify NMOS tube K1, the electric current of K2 be flow through unit NMOS tube 11,12 electric current K doubly (1≤K≤100), and be divided to ground.Therefore, the electric current flowing through load capacitance Cz is only original
equivalent capacity just becomes original (1+K) doubly.The multiplication factor of active capacitor module of the present invention is wide, long than multiple K and reference capacitance C by amplifying metal-oxide-semiconductor
zdetermine.The active capacitor module of the present invention's design is ensureing, on the basis that miller capacitance amplifies, to have employed the both-end connected mode of symmetrical structure, ensure that the arbitrariness of active capacitor model calling.
Impedance Z in compensating network
1and impedance Z
2there is the series and parallel form of multiple on-chip active device.If Z
1comprise single active pull-up module, Z
2comprise the parallel module of an active pull-up module and an active capacitor module composition, compensating network is the single pole compensation network (TYPE-I) with bandwidth gain restriction, and it can provide one to compensate limit.If Z
1comprise single active pull-up module, Z
2to comprise after an active pull-up module and an active capacitor block coupled in series again with the module of a Capacitance parallel connection, compensating network is first order pole-simple zero compensating network (TYPE-II), it one can be provided to compensate limit and one compensate zero point.TYPE-III type compensating network can provide two to compensate zero point, and it is divided into again two kinds according to system bandwidth.If system bandwidth <500kHz, then the zero point that ESR introduces ignores, now Z
1comprise active pull-up module parallel with one another and active capacitor module, Z
2be the module of an active pull-up module active capacitor block coupled in series, compensating network is duopole-bis-zero compensation network (TYPE-III (a)), and it can provide two to compensate limits and two and compensate zero point.If system bandwidth >500kHz, then must consider the zero point that ESR introduces, now Z
1still active pull-up module parallel with one another and active capacitor module is comprised, Z
2offset again the module of the Capacitance parallel connection at ESR zero point with one after comprising an active pull-up module and an active capacitor block coupled in series, compensating network is three limits-bis-zero compensation network (TYPE-III (b)), and it can provide three to compensate limits and two and compensate zero point.The active pull-up module R of the present invention's design
awith active capacitor module C
aflexible combination can be carried out, convenient expansion according to different compensating network structures.What the present invention proposed is that a kind of TYPE-III (b) type compensates based on fully integrated compensating network specific implementation on the sheet of constant transconductance amplifier and capacitor multiflier.
Refer to shown in Fig. 4, when forming TYPE-I type compensating network, impedance Z
1comprise active resistive module R
a1; Active pull-up module R
a2with active capacitor module C
a1formation impedance Z in parallel
2; Described active pull-up module R
a1, active pull-up module R
a2with described active pull-up module R
astructure is identical; Active capacitor module C
a1with described active capacitor module C
astructure is identical; Active pull-up module R
a1port V
imeet input voltage V
in, port I
omeet port P
1; Port P
1connect the first input end of operational amplifier A MP; Active pull-up module R
a2port V
imeet the output V of operational amplifier A MP
o, active pull-up module R
a2port I
omeet port P
1; Active capacitor module C
a1port M and N meet port P respectively
1with the output V of operational amplifier A MP
o.
Refer to shown in Fig. 5, when forming TYPE-II type compensating network, impedance Z
1comprise active resistive module R
a1; Active pull-up module R
a2with active capacitor module C
a1series connection again with electric capacity C
2formation impedance Z in parallel
2; Described active pull-up module R
a1, active pull-up module R
a2with described active pull-up module R
astructure is identical; Active capacitor module C
a1with described active capacitor module C
astructure is identical; Active pull-up module R
a1port V
imeet input voltage V
in, active pull-up module R
a1port I
omeet port P
1; Port P
1connect the first input end of operational amplifier A MP; Active pull-up module R
a2port V
imeet the output V of operational amplifier A MP
o, active pull-up R
a2the port I of module
omeet port P
2; Active capacitor module C
a1port M and N meet port P respectively
1with port P
2; ESR building-out capacitor C
2be connected to port P
1with the output V of operational amplifier A MP
obetween.
Refer to shown in Fig. 6, when forming TYPE-III (a) type compensating network, impedance Z
1comprise active pull-up module R in parallel
a1with active capacitor module C
a1; Active pull-up module R
a2with active capacitor module C
a2impedance Z in series
2; Described active pull-up module R
a1, active pull-up module R
a2with described active pull-up module R
astructure is identical, described active capacitor module C
a1, active capacitor module C
a2with described active capacitor module C
astructure is identical; Active pull-up module R
a1port V
imeet input voltage V
in, active pull-up module R
a1port I
omeet port P
1; Active capacitor module C
a1port M and N meet input voltage V respectively
inwith port P
1; Port P
1connect the first input end of operational amplifier A MP; Active pull-up module R
a2port V
imeet the output V of operational amplifier A MP
o, active pull-up module R
a2port I
omeet port P
2; Active capacitor module C
a2port M and N meet port P respectively
1with port P
2.
Refer to shown in Fig. 7, when forming TYPE-III (b) type compensating network, impedance Z
1comprise active pull-up module R in parallel
a1with active capacitor module C
a1; Active pull-up module R
a2with active capacitor module C
a2series connection again with electric capacity C
3formation impedance Z in parallel
2; Described active pull-up module R
a1, active pull-up module R
a2with described active pull-up module R
astructure is identical, described active capacitor module C
a1, active capacitor module C
a2with described active capacitor module C
astructure is identical; Active pull-up module R
a1port V
imeet input voltage V
in, active pull-up module R
a1port I
omeet port P
1; Active capacitor module C
a1port M and N meet input voltage V respectively
inwith port P
1; Port P
1connect the first input end of operational amplifier A MP; Active pull-up module R
a2port V
imeet the output V of operational amplifier A MP
o, active pull-up module R
a2port I
omeet port P
2; Active capacitor module C
a2port M and N meet port P respectively
1with port P
2; ESR building-out capacitor C
3be connected to port P
1with the output V of operational amplifier A MP
obetween.
The present invention propose based on fully integrated compensating network middle impedance Z on the sheet of constant transconductance amplifier and capacitor multiflier
1and impedance Z
2two can be produced and compensate zero point, provide the phase place of 180 ° advanced, compensate the delayed phase that low pass filter multiple pole causes.Circuit direct place provides one to compensate limit, and make DC current gain high, systematic steady state error is zero.In addition, impedance Z
1produce one and compensate the zero point that limit offsets output capacitance ESR introducing; Impedance Z
2produce another and compensate limit to ensure that open-loop transfer function has a good phase margin and gain, ensure that at the descending slope of high band amplitude-frequency characteristic be-40dB/dec simultaneously, have the effect of good suppression High-frequency Interference.
Advantage of the present invention mainly contains the following aspects:
(1) relative to the outer discrete device of conventional compensation Web vector graphic sheet, the present invention adopts constant transconductance amplifier as active pull-up, and capacitor multiflier, as active capacitor, instead of conventional compensation network impedance Z
1and impedance Z
2the discrete devices such as the passive resistance of middle employing and electric capacity, fully integrated on the sheet achieving compensating network, improve the integrated level of system, and there is excellent anti-process corner stability feature.
(2) circuit structure of the present invention is simple, is easy to design; Can flexible Application in TYPE-I, TYPE-II and TYPE-III type compensating network structure, the resistance of active pull-up module and the capacitance of active capacitor module be easy to regulate, there is versatility, easy to utilize and Function Extension.
Above content is in conjunction with concrete preferred implementation further description made for the present invention; can not assert that the specific embodiment of the present invention is only limitted to this; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; some simple deduction or replace can also be made, all should be considered as belonging to the scope of patent protection that claims that the present invention submits to are determined.
Claims (1)
1., based on a fully integrated compensating network on the sheet of constant transconductance amplifier and capacitor multiflier, it is characterized in that, comprise impedance Z
1, impedance Z
2with operational amplifier A MP; Impedance Z
1input termination input voltage V
in, impedance Z
1the first input end of output termination operational amplifier A MP; Impedance Z
2the first input end of input termination operational amplifier A MP, impedance Z
2the output of output termination operational amplifier A MP; The second input termination reference voltage V of operational amplifier A MP
ref;
Impedance Z
1and impedance Z
2comprise active resistive module R
aand/or active capacitor module C
a;
Described active pull-up module R
ait is the operational transconductance amplifier of a reverse input end and output short circuit; Described active pull-up module R
aresistance be
g
mfor the mutual conductance of operational transconductance amplifier;
Described active capacitor module C
ait is the capacitor multiflier that a both-end connects;
When forming TYPE-I type compensating network, impedance Z
1comprise active resistive module R
a1; Active pull-up module R
a2with active capacitor module C
a1formation impedance Z in parallel
2; Described active pull-up module R
a1, active pull-up module R
a2with described active pull-up module R
astructure is identical; Active capacitor module C
a1with described active capacitor module C
astructure is identical; Active pull-up module R
a1port V
i1meet input voltage V
in, active pull-up module R
a1port I
o1meet port P
1; Port P
1connect the first input end of operational amplifier A MP; Active pull-up module R
a2port V
i2meet the output V of operational amplifier A MP
o, active pull-up module R
a2port I
o2meet port P
1; Active capacitor module C
a1port M
1and N
1meet port P respectively
1with the output V of operational amplifier A MP
o;
When forming TYPE-II type compensating network, impedance Z
1comprise active resistive module R
a1; Active pull-up module R
a2with active capacitor module C
a1series connection again with ESR building-out capacitor C
2formation impedance Z in parallel
2; Described active pull-up module R
a1, active pull-up module R
a2with described active pull-up module R
astructure is identical; Active capacitor module C
a1with described active capacitor module C
astructure is identical; Active pull-up module R
a1port V
i1meet input voltage V
in, active pull-up module R
a1port I
o1meet port P
1; Port P
1connect the first input end of operational amplifier A MP; Active pull-up module R
a2port V
i2meet the output V of operational amplifier A MP
o, active pull-up R
a2the port I of module
o2meet port P
2; Active capacitor module C
a1port M
1and N
1meet port P respectively
1with port P
2; ESR building-out capacitor C
2be connected to port P
1with the output V of operational amplifier A MP
obetween;
When forming TYPE-III (a) type compensating network, impedance Z
1comprise active pull-up module R in parallel
a1with active capacitor module C
a1; Active pull-up module R
a2with active capacitor module C
a2impedance Z in series
2; Described active pull-up module R
a1, active pull-up module R
a2with described active pull-up module R
astructure is identical, described active capacitor module C
a1, active capacitor module C
a2with described active capacitor module C
astructure is identical; Active pull-up module R
a1port V
i1meet input voltage V
in, active pull-up module R
a1port I
o1meet port P
1; Active capacitor module C
a1port M
1and N
1meet input voltage V respectively
inwith port P
1; Port P
1connect the first input end of operational amplifier A MP; Active pull-up module R
a2port V
i2meet the output V of operational amplifier A MP
o, active pull-up module R
a2port I
o2meet port P
2; Active capacitor module C
a2port M
2and N
2meet port P respectively
1with port P
2;
When forming TYPE-III (b) type compensating network, impedance Z
1comprise active pull-up module R in parallel
a1with active capacitor module C
a1; Active pull-up module R
a2with active capacitor module C
a2series connection again with ESR building-out capacitor C
3formation impedance Z in parallel
2; Described active pull-up module R
a1, active pull-up module R
a2with described active pull-up module R
astructure is identical, described active capacitor module C
a1, active capacitor module C
a2with described active capacitor module C
astructure is identical; Active pull-up module R
a1port V
i1meet input voltage V
in, active pull-up module R
a1port I
o1meet port P
1; Active capacitor module C
a1port M
1and N
1meet input voltage V respectively
inwith port P
1; Port P
1connect the first input end of operational amplifier A MP; Active pull-up module R
a2port V
i2meet the output V of operational amplifier A MP
o, active pull-up module R
a2port I
o2meet port P
2; Active capacitor module C
a2port M
2and N
2meet port P respectively
1with port P
2; ESR building-out capacitor C
3be connected to port P
1with the output V of operational amplifier A MP
obetween.
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|---|---|---|---|
| CN201310208472.1A CN103354419B (en) | 2013-05-30 | 2013-05-30 | Based on fully integrated compensating network on the sheet of constant transconductance amplifier and capacitor multiflier |
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| CN103354419B true CN103354419B (en) | 2016-03-30 |
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|---|---|---|---|---|
| US9762125B2 (en) | 2014-01-30 | 2017-09-12 | The Hong Kong University Of Science And Technology | Area-efficient differential difference amplifier compensator |
| CN106655739A (en) * | 2017-01-17 | 2017-05-10 | 上海施能电器设备有限公司 | Control circuit used for constant-voltage current-limiting charging |
| CN112114611B (en) * | 2019-06-21 | 2022-04-12 | 圣邦微电子（北京）股份有限公司 | Circuit for improving transient response speed of voltage mode control loop |
| CN111552343B (en) * | 2020-05-22 | 2022-08-16 | 聚洵半导体科技（上海）有限公司 | Low-voltage low-current bias current circuit |
| EP3945672A1 (en) | 2020-07-31 | 2022-02-02 | NXP USA, Inc. | Error amplifier circuits for dc-dc converters, dc-dc converters and controllers |
| CN112054816B (en) * | 2020-08-06 | 2021-11-19 | 西安交通大学 | Full-integrated full-duplex transceiver based on active quasi-circulator and self-interference cancellation |
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| TWI246249B (en) * | 2004-04-30 | 2005-12-21 | Ind Tech Res Inst | Frequency tuning loop for active-Rc filters |
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| CN102386859A (en) * | 2010-08-27 | 2012-03-21 | 杭州中科微电子有限公司 | Wide band amplifier with frequency compensation |
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