CN108566084A - A kind of communication system of charge pump and its method for adjusting voltage - Google Patents

A kind of communication system of charge pump and its method for adjusting voltage Download PDF

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Publication number
CN108566084A
CN108566084A CN201810419380.0A CN201810419380A CN108566084A CN 108566084 A CN108566084 A CN 108566084A CN 201810419380 A CN201810419380 A CN 201810419380A CN 108566084 A CN108566084 A CN 108566084A
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China
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voltage
coupled
output
control
capacitor
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Chinese (zh)
Inventor
刘睿强
林涛
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Chongqing College of Electronic Engineering
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Chongqing College of Electronic Engineering
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Priority to CN201810419380.0A priority Critical patent/CN108566084A/en
Publication of CN108566084A publication Critical patent/CN108566084A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/06Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps

Abstract

The present invention relates to a kind of methods of the communication system and its adjusting voltage of the communications field more particularly to charge pump.The method of the adjusting voltage includes generating the first control voltage to plurality of users line interface circuit using exchange voltage regulator, and each user's line interface circuit system is operable, to control the communication through one of plurality of users line;Using the charge pump stage for being coupled to receive the first control voltage, the second control voltage is generated to the plurality of users line interface circuit according to the first control voltage;And the exchange adjuster is controlled, to change the size of first and second control voltage according to the mode of operation of such user's line interface circuit.

Description

A kind of communication system of charge pump and its method for adjusting voltage
Technical field
The present invention relates to a kind of methods of the communication system and its adjusting voltage of the communications field more particularly to charge pump.
Background technology
In the communication system of especially phone, common way is via a two-wire two-way communication channel in subscriber station Signal is transmitted between (subscriber station) and central exchange office (central switching office).Line card (line car) usually makes the subscriber station be connected to the central exchange office.Line card generally includes at least user's line interface circuit (SLIC) and user's line audio frequency processing circuit (SLAC).The function of the line card is from supply speaking battery (talk battery) to holding The wake-up of row circuit sequentially allows the generation of communication.
Ownership's line interface circuit (SLICs) entreats low-voltage signal path and high-voltage electricity in exchange in the phone Interface is provided between words user's line.The SLIC provide as off-hook (off-hook) detecting, bell signal generate and to user's line it Battery powered function.User's line by telephone transmission line two conducting wires of A lines and B lines or end line and loop wire (including referred to as) with The house exchange system (also that is, load) coupled across end line and loop wire is formed.SLIC is carried from the telephone central exchange For electric power to user's line, to respond reception cell voltage.DC cell voltages are provided to the SLIC, to supply power to the SLIC and be somebody's turn to do User's line.For example, usually providing low negative voltage source VBL and high negative voltage source VBH to the SLIC.Usually at off-hook (off-hook) The sources VBL are used during operation, to support primary call.The sources VBH are usually used during on-hook (on-hook) operates, with Support ring.
Traditional technology to generate the SLIC input voltages includes (respective power source for being used for voltage source) per channel power supply Or shared multi-output power supply.Although can be generated with relatively low cost inductor to implement every channel cell voltage, per channel An inductor is needed, this contributes totle drilling cost and real estate spent by such power supply.A kind of shared multiple-output method needs to have The single higher cost transformer for having multi output tap, to allow to generate different output voltages.
Invention content
In order to solve the above-mentioned technical problem, an object of the present disclosure provides a kind of communication system of charge pump.
The technical solution that the present invention takes to achieve the above object is:
A kind of communication system of charge pump, the system include plurality of users line interface circuit, each user's line interface electricity Road is operable to communication of the control through one of plurality of users line, and wherein each user's line interface circuit is operable to Receive first and second control voltage;Switching stage is operable to generate the first control voltage, and the switching stage includes switch, is opened Pass is coupled between input terminal and energy storage components;First output capacitor is coupled between the switch and the energy storage components The first node defined, first output capacitor are coupled to the first output voltage terminal, in order to provide the first control voltage; First diode is coupled between first output capacitor and first node, and is configured to filling in the energy storage components Prevent electric current from flowing to first output capacitor from the energy storage components during the electric stage;Charge pump stage is coupled to receive This first control voltage and according to this first control voltage generate this second control voltage, and the charge pump stage include second output Capacitor is coupled to the second output voltage terminal;Third capacitor is coupled between the first node and the second output terminal voltage;The Two diodes are coupled between second output capacitor and the third capacitor, and be configured to the energy storage components it Prevent electric current from flowing to second output capacitor from the third capacitor during charging stage;Second node is defined in the third Between capacitor and second diode;Third diode is coupled between the second node and first output capacitor;Controller Be operable to control its and exchange voltage regulator, so as to changed according to the mode of operation of such user's line interface circuit this first And second control voltage size.
As a further improvement, the second output capacitor system is coupled to second output voltage terminal and the first output electricity Between pressure side.
As a further improvement, the controller, which is operable to control the switch, generates the first control electricity in the first level Pressure, should wait users' line interface circuit to be all not on ringing condition back and forth, and, generate first control in the second level Voltage should wait at least one of users' line interface circuit to be in ringing condition back and forth, and second level is big in size In first level.
As a further improvement, the energy storage components include inductor.
As a further improvement, the controller is operable to according to the voltage on first output voltage terminal to control pair The pulse width for the exchange signal that the switch is provided.
The second object of the present invention provides a kind of method that voltage is adjusted in the communication system of charge pump, and this method includes: The first control voltage is generated to plurality of users line interface circuit using voltage regulator is exchanged, each user's line interface circuit can Communication of the control through one of plurality of users line is operated into, and its switching stage includes switch, it is defeated which is coupled to one Enter between end and energy storage components;First output capacitor is coupled to defined between the switch and the energy storage components One node, first output capacitor are coupled to the first output voltage terminal, in order to provide the first control voltage;First diode It is coupled between first output capacitor and the first node, and is configured to phase charging stage in the energy storage components Between prevent electric current from flowing to first output capacitor from the energy storage components;Using being coupled to receive the first control electricity The charge pump stage of pressure, according to the first control voltage to generate the second control voltage to the plurality of users line interface circuit, and The charge pump stage system includes the second output capacitor, and the second output capacitor is coupled to second and goes out voltage end;Third capacitor coupling It is connected between the first node and second output voltage terminal;Second diode is coupled to second output capacitor and third electricity Between container, and it is configured to prevent electric current from flowing to this from the third capacitor during the charging stage of the energy storage components Second output capacitor;Second node is defined between the third capacitor and second diode;Third diode is coupled to Between the second node and first output capacitor;The exchange adjuster is controlled with according to the operation of such user's line interface circuit State and the size for changing this first and second control voltage.
As a further improvement, the step of controlling the exchange adjuster further comprises:The exchange adjuster is controlled to produce Raw the first control voltage in the first level should wait users' line interface circuit to be all not on ringing condition back and forth, and Generate the second level this first control voltage, should wait back and forth users' line interface circuit it is therein at least one be in ring State, and second level is more than first level in size.
As a further improvement, the step of controlling the exchange adjuster includes:According to the voltage value of the first control voltage To control the pulse width of the exchange signal provided the exchange voltage regulator.
As a further improvement, the second output capacitor system is coupled to second output voltage terminal and the first output electricity Between pressure side.
The present invention changes the steady-state value of VBL and VBH by the mode of operation of SLIC, can reduce power consumption, because only When needing to support ring, high voltage is generated.
Description of the drawings
Fig. 1 is the block diagram of the communication system of the present invention.
Fig. 2 is the state diagram of the control of the voltage level and voltage source of user's line interface circuit in the system of the present invention.
Fig. 3 is the circuit diagram of the voltage regulator power stage in present system.
Fig. 4 is the curve graph of the operation of the power stage of the present invention.
Specific implementation mode
The specific implementation mode of the present invention is made a detailed explanation below in conjunction with the accompanying drawings.
As shown in Figs 1-4, a kind of voltage regulator includes generating the exchange part of the first supply voltage and to basis The first supply voltage generates the charge pump section of the second supply voltage.It can be according to by receiving first and second supply voltage To control this, first and second supplies the big of voltage to the mode of operation for user's line that user's line interface circuit (SLICs) is supported It is small.The output capacitor for being coupled to the exchange part and the charge pump section can be stacked, the decrease of the second supply voltage is inhibited (collapse), to respond the reduction of the stable state level of the first supply voltage.
As shown in Figure 1, a kind of communication system of charge pump, including user's line audio frequency processing circuit 105, plurality of users line Interface circuit (SLICs) 110,115 and voltage regulator 120.The voltage regulator 120 includes power stage 125 and controller 130.The voltage regulator 120 generates supply the voltage VBH and VBL for such SLIC 110,115, to support through use The communication of family line TIP/RING lines T/R1, T/R2.Although the controller 130 is described as an individual entities, can be by it It is integrated into another unit as the SLAC 105.The controller 130 includes using the feedback (" FB ") from the power stage 125 And the error amplifier 135 of the reference voltage (" VREF ") from the SLAC 105, to control the power stage 125.
110,115 pairs of Foreign eX-change Subscriber (FXS) circuits of such SLIC provide electronic interfaces, so as to be coupled to this The telephone device communication of equal TIP/RING lines T/R1, T/R2.The SLAC 105 provides high layer function, for example, sound signal turns It changes and handles, global impedance matching, call control signals are generated and detected and cell voltage control.
The SLAC 105 makes the controller 130 be equipped with expectation voltage level VREF for VBL supply voltages.It should SLAC 105 can change VREF, to respond the mode of operation of such SLIC 110,115.Because generating VBH according to VBL, so The change of VREF will change VBL and VBH.During operation, which sets the numerical value of VREF, to be equal to the pact-of VBL The numerical value of 25V, and such SLIC 110,115 is in idle state (on-hook).VBH position of this VBL settings corresponding to about -60V It is accurate.This VBH value is sufficiently high, transmits with on-hook end line/loop wire voltage of abundant surplus (headroom) support -48V and also and calls Person's identification signal.If user's line is in off hook state, its related SLIC 110,115 switches its voltage source from VBH To VBL, to minimize power consumption.When as such SLIC 110,115, one of them is in ringing condition, the VBH voltages are necessary It is higher, to support about -70 to -80Vpk required spike ringing voltage.As a result, the SLAC 105 increases VREF, to correspond to The numerical value of the pact -35V Zhi -40V of VBL, causes VBH to increase to about -80 to -90V.The high value of VBH provides abundant surplus, with Support clean sinusoidal ringing waveform.Under the conditions of idle, another non-ringing wire will use VBH, to maintain on-hook voltage.If The non-ringing wire starts, then it will use VBL, to provide loop current to off-hook user's line.When the ringing wire is no longer on When the ringing condition, which adjusts VBL return -25V, to reduce power dissipation.
As shown in Fig. 2, such SLIC 110,115 selects a voltage source according to their mode of operation.Every SLIC 110,115 its voltage source can be selected and independent of the mode of operation of another SLIC 110,115.If with a SLIC 110, 115 connected user's lines are in on-hook, then as shown in state 210, the SLIC 110,115 is from the sources the VBH draw power.Such as Fruit user's line becomes off-hook as shown in transition 220, then the SLIC 110,115 such as changes shown in state 230 to VBL.When the use When family line becomes on-hook again as shown in transition 240, which returns to state 210 and selection VBH as its voltage source.
The SLAC 105 controls the level of VBL according to the mode of operation of such SLIC 110,115.If be in without line Ring, then the SLAC 105 such as controls VBL shown in state 250 are in a low setting value (for example, VBL=-25V, VBH=-60V). If one or more SLIC 110,115 enter a ringing condition, the SLAC 105 such as state as shown in transition 260 The 270 shown numerical value for increasing VBL to a high setting value (for example, VBL=-35V to -40V, VBH=-70V extremely -80V).When such When SLIC110,115 are not on ringing condition as shown in transition 280, which makes VBL be back to as shown in state 250 The low setting.
As shown in figure 3, the power stage 125 includes generating the switching stage 300 of VBL and to generate VBH according to VBL Charge pump stage 350.The switching stage 300 includes being coupled to input voltage source VSW with energy storage components 310 (for example, inductor 310) electric-controlled switch 305 (such as PNP power electric crystals 305) between.It is exported with pulse width modulation caused by controller 130 Signal PWM_OUT controls the switch 305.It will be via the transistor 305 energy stored in the inductor 310 via two poles Body 320 is transferred to output capacitor 315, to generate VBL on output end 325.The charge pump stage 350 includes being coupled at this The boost capacitor 355 of the switching node 330 defined between transistor 305 and the inductor 310.The boost capacitor 355 passes through Output capacitor 365 is coupled to by diode 360, to generate VBH on output end 370.In the boost capacitor 355 and it is somebody's turn to do A diode 375 is coupled between the charge pump node 380 and the switching node 330 that are defined between diode 360.
As shown in figure 4, in general, the controller 130 sets the work period of the PWM_OUT signals, to be put according to the error The level for the feedback information control VBL that big device 135 provides.Because the switch 305 is described as p-type device in figure 3, When PWM_OUT is low level, turn-on cycle SW_ON occurs, and when PWM_OUT is high levels, occur to close period SW_ OFF.It with SW signals indicates the voltage on the switching node 330, and is indicated in the charge pump node 380 with CP signals Upper voltage.During the charge cycle indicated with SW_ON, as inductor current it is cumulative shown in, charge the inductor 310. Voltage SW on the switching node 330 corresponds to the voltage (for example, 12V) for the voltage source VSW for supplying electricity to the switch 305.At this Nominally the voltage CP on charge pump node 380 corresponds to the forward diode pressure drop of the poor diodes 375 of VBL.It recharges here During stage, energy is established in the inductor 310.Such diode 320,360 is applied in reverse biased, and thus, prevent Only electric current separately flows into such output capacitor 315,365.Because voltage SW is VSW and voltage CP is VBL, across The voltage of the boost capacitor 355 is that about VBL adds VSW (not being included in diode pressure drop).When charge the inductor 310 when, In the case where the diode 360 is applied in reverse biased, the diode 375 allows the boost capacitor 355 to be electrically charged up to~VBL+ VSW。
When closing the switch 305, the field weakening of the inductor 310 and the SW voltages are speeded because inductor is counter (inductor flyback) and reversed polarity.Electric current that will be stored in the inductor 310 is distributed via the diode 320 It is distributed to the output capacitor 365 to the output capacitor 315 and via the boost capacitor 355 and the diode 360.It applies Add reverse biased to the diode 375.In the down periods, when the SW voltage reversal polarity chrons, the CP voltages also reversed polarity, But the boost capacitor 355 still maintenance~VSW adds VBL charges.When voltage SW reaches the VBL values, voltage CP For VBL+VBL+VSW (2 × VBL+VSW).Therefore, for the low setting of VBL=-25V and VSW=12V, VBH=-62V.For The high setting of VBL=-35V and VSW=12V, VBH=-82V.Electric current two output capacitors of charging from the inductor 310 315、365.When the inductor 310 charges, which serves as a permission charge and is added to the boost capacitor 355 Switch, and then, which closes, to allow charge transfer to the output capacitor 365 being connected with VBH.It should Equal output capacitors 315,365 provide filtering and energy storage for VBL and VBH voltages.Although for each voltage source VBL, VBH only describe single output capacitor 315,365, but in some concrete examples, can use the networks RC (not shown) To provide additional filtering.
The controller 130 generates the FB signals, to adjust the VBL by the numerical value for sampling VBL on the output end 325 The steady-state value of voltage.In some concrete examples, which uses fixed frequency and variable pulse width signal, wherein SW_ ON systems can be configured to control the turn-on time of the switch 305, to influence the energy storage components 310 can be electrically charged how many. The increase in charging time and increase from power and the reduction in charging time of VBL transmission and reduce the power from VBL transmission.Cause This, which sets the work period according to the load on VBL.The error amplifier 135 monitors on VBL The work period of voltage and the controller 130 adjustment PWM_OUT, to maintain appropriate voltage level.
In order to allow the preferable adjusting of VBH, such output capacitor 315,365 is stacked.Therefore, the load on VBH will Energy is promoted to be removed from two output capacitors 315,365, this will influence the VBL values and the controller 130 is forced to do it Correction tackles the load.In fact, the load on VBL or VBH will promote the controller 130, to adjust the work of PWM_OUT Period compensates.For example, when the steady-state value of VBL is reduced to compared with low set point, the coupling between such output capacitor 315,365 Closing prevents VBH from weakening in the case where being loaded with the level than VBL high.Load on VBH will make two output capacitors 315,365 charge is reduced, until the controller 130 recognizes the load and controls the work period come until maintaining VBL.One In a little concrete examples, such output capacitor 315,365 has identical capacitance values, so they are discharged with phase same rate.
In some concrete examples, it is bright that the institute on computer readable media can be executed by one or more processors One or more software formulas really stored, to implement above-mentioned at least some functions, and whereby, this or one with Upper software formula include when executed to manipulate one or more processors implement above-mentioned processing system one A or more than one function instruction.
Computer-readable storage medium may include the combination of any store media or store media, during use may be used It is accessed by a computer system, to provide instruction and/or data to the computer system.Such store media may include but not office It is limited to optical media (for example, optical disc (CD), diversified numerical digit optical disc (DVD) or Blu-ray Disc), magnetic medium (for example, soft magnetism Dish, tape or magnetic hard disc), it is volatile memory (for example, random access memory (RAM) or cache memory), non-volatile Memory body (for example, read-only memory (ROM) or fast flash memory bank) or the store media based on MEMS (MEMS). The computer-readable storage medium can be imbedded in the computer system in (for example, system RAM or ROM), is fixedly mount to The computer system (for example, magnetic hard disc) is removably mountable to the computer system (for example, optical disc or with universal serial bus (USB) fast flash memory bank based on) or via wired or wireless network the computer system is coupled to (for example, network storage dress It sets (NAS)).
Voltage regulator and voltage management technology described herein reduces the cost of circuit and reduces power consumption.The exchange Grade 300 and the charge pump stage 350 share the inductor 310, so as to reducing the size and cost of the power stage 125.According to such SLIC110,115 mode of operation change the steady-state value of VBL and VBH, power consumption can be reduced, because only needing to support to shake When bell, high voltage is generated.
As above disclosed, in some concrete examples, a kind of voltage regulator includes being coupled to Input voltage terminal to store up with energy It deposits the switch of interelement, be coupled to the first output capacitance of the first node defined between the switch and the energy storage components Device (first capacitor is coupled to one first output voltage terminal) is coupled to the first node and includes being coupled to the second output electricity It the charge pump circuit of the second output capacitor between pressure side and first output voltage terminal and is operable to selectively make this Switch can control the controller of produced voltage on first and second output end.
As disclosed herein, in some concrete examples, which includes plurality of users line interface circuit, each user's line Interface circuit system is operable, to control the communication through one of plurality of users line, wherein each user's line interface is electric Road is operable, to receive first and second control voltage;Switching stage is operable, to generate the first control voltage; Charge pump stage its be coupled to receive the first control voltage and the second control voltage generated according to the first control voltage; And a controller, it is operable, to control the exchange voltage regulator, so as to according to the behaviour of such user's line interface circuit Change the size of first and second control voltage as state.
As disclosed herein, in some concrete examples, a kind of method that voltage is adjusted in the communication system method of charge pump Voltage regulator is exchanged to plurality of users line interface circuit generation the first control voltage, each user's line interface electricity including using Road is operable, to control the communication through one of plurality of users line;Using being coupled to receive first control The charge pump stage of voltage processed generates the second control voltage according to the first control voltage to the plurality of users line interface circuit; And the exchange adjuster is controlled, to change first and second control electricity according to the mode of operation of such user's line interface circuit The size of pressure.

Claims (9)

1. a kind of communication system of charge pump, it is characterised in that:The system includes plurality of users line interface circuit, each user Line interface circuit is operable to communication of the control through one of plurality of users line, and wherein each user's line interface circuit It is operable to receive first and second control voltage;Switching stage is operable to generate the first control voltage, and the switching stage packet Switch is included, switch is coupled between input terminal and energy storage components;First output capacitor is coupled in the switch and the energy The first node defined between storage element, first output capacitor are coupled to the first output voltage terminal, in order to provide this One control voltage;First diode is coupled between first output capacitor and first node, and is configured in the energy Prevent electric current from flowing to first output capacitor from the energy storage components during the charging stage of storage element;Charge pump stage coupling It is connected into receive the first control voltage and the second control voltage is generated according to the first control voltage, and the charge pump stage Including the second output capacitor, it is coupled to the second output voltage terminal;It is second defeated with this that third capacitor is coupled to the first node Go out between terminal voltage;Second diode is coupled between second output capacitor and the third capacitor, and is configured at this Prevent electric current from flowing to second output capacitor from the third capacitor during the charging stage of energy storage components;Second node It is defined between the third capacitor and second diode;Third diode is coupled to the second node and the first output electricity Between container;Controller is operable to control its exchange voltage regulator, so as to according to the operation shape of such user's line interface circuit State and the size for changing this first and second control voltage.
2. a kind of communication system of charge pump according to claim 1, it is characterised in that:The second output capacitor system coupling It is connected between second output voltage terminal and first output voltage terminal.
3. a kind of communication system of charge pump according to claim 1, it is characterised in that:The controller is operable to control The switch generates the first control voltage in the first level, users' line interface circuit should be waited all to be not on ring shape back and forth State, and, the first control voltage in the second level is generated, at least one of users' line interface circuit place should be waited back and forth In ringing condition, and second level is more than first level in size.
4. a kind of communication system of charge pump according to claim 1, it is characterised in that:The energy storage components include electricity Sensor.
5. a kind of communication system of charge pump according to claim 1, it is characterised in that:The controller is operable to basis Voltage on first output voltage terminal is to control the pulse width of the exchange signal provided the switch.
6. a kind of method for adjusting voltage in communication system of charge pump, which is characterized in that this method includes:Use exchange voltage Adjuster generates the first control voltage to plurality of users line interface circuit, and it is saturating that each user's line interface circuit is operable to control The communication of one of plurality of users line is crossed, and its switching stage includes switch, which is coupled to an input terminal and is stored up with energy Deposit interelement;First output capacitor is coupled to the first node defined between the switch and the energy storage components, this One output capacitor is coupled to the first output voltage terminal, in order to provide the first control voltage;First diode be coupled to this Between one output capacitor and the first node, and it is configured to prevent electric current during the charging stage of the energy storage components It flow to first output capacitor from the energy storage components;Use the charge pump for being coupled to receive the first control voltage Grade, according to the first control voltage to generate the second control voltage, and the charge pump stage to the plurality of users line interface circuit System includes the second output capacitor, and the second output capacitor is coupled to second and goes out voltage end;Third capacitor be coupled to this first Between node and second output voltage terminal;Second diode is coupled between second output capacitor and the third capacitor, and It is configured to prevent electric current from flowing to second output from the third capacitor during the charging stage of the energy storage components Capacitor;Second node is defined between the third capacitor and second diode;Third diode is coupled to second section Between point and first output capacitor;The exchange adjuster is controlled with the mode of operation according to such user's line interface circuit to change Become the size of first and second control voltage.
7. the method for adjusting voltage in a kind of communication system of charge pump according to claim 6, it is characterised in that:Control The step of exchange adjuster, further comprises:The exchange adjuster is controlled to generate the first control electricity in the first level Pressure should wait users' line interface circuit to be all not on ringing condition back and forth, and generate first control in the second level Voltage, should wait back and forth users' line interface circuit it is therein at least one be in ringing condition, and second level is in size More than first level.
8. the method for adjusting voltage in a kind of communication system of charge pump according to claim 6, it is characterised in that:Control The step of exchange adjuster includes:The exchange voltage regulator is carried with controlling according to the voltage value of the first control voltage The pulse width of the exchange signal of confession.
9. the method for adjusting voltage in a kind of communication system of charge pump according to claim 6, it is characterised in that:This Two output capacitor systems are coupled between second output voltage terminal and first output voltage terminal.
CN201810419380.0A 2018-05-04 2018-05-04 A kind of communication system of charge pump and its method for adjusting voltage Pending CN108566084A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1470097A (en) * 2000-08-31 2004-01-21 伊利诺伊大学评议会 Multiple output dynamically regulated charge pump power converter
CN103023308A (en) * 2011-09-26 2013-04-03 立锜科技股份有限公司 Power supply circuit and power supply circuit with adaptive enabling charge pump
US20130234513A1 (en) * 2012-02-28 2013-09-12 Texas Instruments Deutschland Gmbh Single inductor-multiple output dc-dc converter, method for operating the same and electronic device comprising the converter
EP2713234A1 (en) * 2012-09-26 2014-04-02 Nxp B.V. A low power low dropout linear voltage regulator
CN104518662A (en) * 2013-09-29 2015-04-15 奇景光电股份有限公司 Half-voltage ratio charge-pump circuit
CN105612683A (en) * 2013-10-07 2016-05-25 美高森美半导体(美国)股份有限公司 Voltage regulator with charge pump for generating second voltage source

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1470097A (en) * 2000-08-31 2004-01-21 伊利诺伊大学评议会 Multiple output dynamically regulated charge pump power converter
CN103023308A (en) * 2011-09-26 2013-04-03 立锜科技股份有限公司 Power supply circuit and power supply circuit with adaptive enabling charge pump
US20130234513A1 (en) * 2012-02-28 2013-09-12 Texas Instruments Deutschland Gmbh Single inductor-multiple output dc-dc converter, method for operating the same and electronic device comprising the converter
EP2713234A1 (en) * 2012-09-26 2014-04-02 Nxp B.V. A low power low dropout linear voltage regulator
CN104518662A (en) * 2013-09-29 2015-04-15 奇景光电股份有限公司 Half-voltage ratio charge-pump circuit
CN105612683A (en) * 2013-10-07 2016-05-25 美高森美半导体(美国)股份有限公司 Voltage regulator with charge pump for generating second voltage source

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Application publication date: 20180921