CN103532526B - Voltage conversion circuit and voltage conversion method - Google Patents
Voltage conversion circuit and voltage conversion method Download PDFInfo
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Abstract
The present invention relates to change-over circuit technical field, be specifically related to a kind of voltage conversion circuit and voltage conversion method, wherein said voltage conversion circuit comprises: inverter circuit; Signal input circuit, for receiving input signal and providing first signal and secondary signal; Power circuit, for providing high voltage source and low-tension supply; Enable circuits, for receiving enable signal and providing the first enable signal and the second enable signal; Change-over circuit is exported high pressure territory signal under described high voltage source and described low-tension supply effect after described change-over circuit and described inverter circuit for input signal, realize the conversion of input signal from low-pressure region to high pressure territory; Latch cicuit, in the time that described change-over circuit quits work, last input signal of signal input circuit described in the latch simultaneously of described latch cicuit. Technical solution of the present invention, has reduced the delay of change-over circuit, has promoted the speed of change-over circuit, and has further reduced circuit power consumption.
Description
Technical field
The present invention relates to change-over circuit technical field, relate in particular to a kind of voltage conversion circuit and voltage transitions sideMethod.
Background technology
For further reducing power consumption, improve processing speed, the development of electronic system continues to low voltage signal moreFuture development, because of the disequilibrium of technical development, the development inequality of lower voltage each side technology has been broughtThe key difficult problem that system designer must solve---how between signal level, to carry out reliable voltage and turnChange. For example present stage electronic system internal digital module operating voltage can be lower, general 1.8V, 1.2V orPerson is lower, and the operating voltage of analog module is higher, be generally 3.3V or 5V, therefore these intermodulesSignal and communication often need to add voltage conversion circuit, comprises that low height or the height of turning turns low circuit etc. and realize different electricityPress the conversion between signal.
It shown in Fig. 1, is voltage conversion circuit schematic diagram in prior art. As shown in Figure 1, electricity in prior artVoltage conversion circuit generally includes PMOS pipe 101 and 102, NMOS pipe 103 and 104, and phase inverter 105.Wherein, PMOS pipe 101 is connected with power circuit with 102 source electrode, provides supply voltage VCCH by it,The drain electrode of PMOS pipe 101 is connected with the drain electrode of NMOS pipe 103 with the grid of PMOS pipe 102 respectively, PMOSThe grid of pipe 101 is connected with the drain electrode of NMOS pipe 104 with the drain electrode of PMOS pipe 102 respectively, and conductThe output of voltage conversion circuit, output transformation result; NMOS pipe 103 is connected and connects with 104 source electrodeGround, the grid of NMOS pipe 103 manages by phase inverter 105 and NMOS that 103 grid is connected and as voltageThe input of change-over circuit. In prior art, when input signal is after phase inverter 105, form input signalReverse signal, thus under the reverse signal effect of input signal and it, realize the low-pressure region of input voltage signalSignal turns high pressure territory signal. Further, in order to realize, the voltage signal in change-over circuit process is realized to oneLatch cicuit has been introduced in fixed latch in change-over circuit in prior art, realize when needed changingThe latch of signal in journey. For example, the patent application that patent publication No. is EP2214314A2, in this patentOne voltage conversion circuit with latch function is provided in application, and the voltage conversion circuit that this patent provides is without makingCan signal, and latch cicuit appears on the signal path of change-over circuit output, causes the delay of signal,And then the speed of the conversion of slowing down, lower efficiency.
With this, in prior art, the voltage conversion circuit shown in Fig. 1, though realized varying voltage signal itBetween conversion, but in the time of certain signal needing in latch transfer process, the voltage conversion circuit shown in Fig. 1But can not realize; With the voltage conversion circuit of latch function, although realized to a certain extent voltage signalLatch, but in change-over circuit, lack the effect control that change-over circuit is had, turn when realizing after translation functionChange in circuit and still have part of devices in running order, certain power consumption that has increased electronic system in degree;And because latch cicuit is on the output of change-over circuit, increase the delay of signal, reduced locating of signalReason speed.
Summary of the invention
For realize in change-over circuit in output signal latch, change-over circuit is carried out to certain controlMake, and further reduce the delay of change-over circuit, promote the speed of change-over circuit, the embodiment of the present invention providesFollowing technical scheme:
In first aspect, the embodiment of the present invention provides a kind of voltage conversion circuit, comprising:
Inverter circuit;
Signal input circuit, for receiving input signal and providing first signal and secondary signal;
Power circuit, for providing high voltage source and low-tension supply;
Enable circuits, for receiving enable signal and providing the first enable signal and the second enable signal;
Change-over circuit is for the first enable signal providing to described change-over circuit when described enable circuitsWhen one level, input signal under described high voltage source and described low-tension supply effect through described change-over circuit andAfter described inverter circuit, export high pressure territory signal, realize the conversion of input signal from low-pressure region to high pressure territory;
Latch cicuit is for the first enable signal of providing when described enable circuits by the first level redirectTwo level, the second enable signal is the first level by second electrical level redirect, when described change-over circuit quits work,Last input signal of signal input circuit described in described latch circuit latches.
Further, described voltage conversion circuit, described in described latch cicuit is coupled in parallelChange-over circuit.
Further, described voltage conversion circuit, the first enable signal providing when described enable circuits isWhen the first level, described the second enable signal is second electrical level, described latch cicuit at described the first level andUnder the effect of described second electrical level, quit work; The first enable signal providing when described enable circuits is secondLevel, when described the second enable signal is the first level, described latch cicuit carries out work.
Further, described voltage conversion circuit, described the first level is high level, described second electrical levelFor low level.
Further, described voltage conversion circuit, described high level is 3.3V, 2.5V, 1.8V, andDescribed low level is 0V.
Further, described voltage conversion circuit, described input signal circuit comprises:
The first phase inverter and be series at the second phase inverter of described the first phase inverter; Wherein, input signal warpAfter described the first phase inverter, provide first signal, after the second phase inverter, provide secondary signal.
Further, described voltage conversion circuit, described enable circuits comprises:
The 3rd phase inverter and be series at the 4th phase inverter of described the 3rd phase inverter; Wherein, enable signal warpAfter described the 3rd phase inverter, provide the second enable signal, after the 4th phase inverter, provide the first enable signal.
Further, described voltage conversion circuit, described change-over circuit comprises: the first metal-oxide-semiconductor, secondMetal-oxide-semiconductor, the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, the 5th metal-oxide-semiconductor and the 6th metal-oxide-semiconductor;
The grid of described the 6th metal-oxide-semiconductor is as the first input end of described change-over circuit, for receiving the first letterNumber; The grid of described the 5th metal-oxide-semiconductor is as the second input of described converting unit, for receiving the second letterNumber; After the source electrode of described the 5th metal-oxide-semiconductor and described the 6th metal-oxide-semiconductor couples, for coupling earth terminal;
The even drain electrode that is connected to described the 5th metal-oxide-semiconductor of source electrode of described the 3rd metal-oxide-semiconductor, described the 4th metal-oxide-semiconductorSource electrode is coupled to the drain electrode of described the 6th metal-oxide-semiconductor; The drain electrode of described the 4th metal-oxide-semiconductor is coupled to a described MOSThe source electrode of the second metal-oxide-semiconductor described in the grid of pipe, and for coupling latch cicuit; The grid of described the 3rd metal-oxide-semiconductorThe grid of the utmost point and described the 4th metal-oxide-semiconductor is coupled, and for coupling enable circuits; Described the 3rd metal-oxide-semiconductorDrain electrode is coupled to the source electrode of described the first metal-oxide-semiconductor and the grid of described the second metal-oxide-semiconductor, and anti-phase for couplingDevice circuit and latch cicuit;
The drain electrode of described the first metal-oxide-semiconductor couples mutually with the drain electrode of described the second metal-oxide-semiconductor, and for receiving high pressurePower supply.
Further, described voltage conversion circuit, described the first metal-oxide-semiconductor and the second metal-oxide-semiconductor are PMOS pipe,Described the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, the 5th metal-oxide-semiconductor and the 6th metal-oxide-semiconductor are NMOS pipe.
Further, described voltage conversion circuit, described latch cicuit comprises:
The 5th phase inverter, be series at the first transmission gate circuit, hex inverter and the string of described the 5th reverserBe coupled to the second transmission gate circuit of described hex inverter;
Described the 5th phase inverter is coupled to described the second transmission gate circuit, forms the first latch terminal, for couplingConnect change-over circuit; Described hex inverter is coupled to described the first transmission gate circuit, forms the second latch terminal,Be used for coupling change-over circuit and inverter circuit.
The voltage conversion circuit that the embodiment of the present invention provides, when first making that enable circuits provides change-over circuitWhen energy signal is the first level, change-over circuit carries out normal low-pressure region signal and turns high pressure territory signal, when enabling electricityWhen the first enable signal that road provides change-over circuit is second electrical level, change-over circuit quits work, and locks simultaneouslyDeposit last input signal of circuit latch signal input circuit. With this, the employing of technical solution of the present invention,In realizing normal low-pressure region signal and turning high pressure territory signal, realize the preservation to signal; And protectingWhen depositing signal, enable signal control change-over circuit quits work, and has promoted change-over circuit matches itsThe operating rate of its circuit; Further, latch cicuit is not serially connected on the output of change-over circuit, is enteringWhen row low-pressure region signal turns high pressure territory signal, reduce the interference to the transmission of change-over circuit signal, can not causeThe delay of change-over circuit, further reduces the speed of change-over circuit.
In second aspect, the embodiment of the present invention also provides a kind of voltage conversion method, comprising:
Change-over circuit receives first signal and the secondary signal that signal input circuit provides, and enable circuits is carriedThe first enable signal of confession and the second enable signal;
When the first enable signal providing to described change-over circuit when described enable circuits is the first level, inputSignal under described high voltage source and described low-tension supply effect through described change-over circuit and described inverter circuitRear output high pressure territory signal, realizes the conversion of input signal from low-pressure region to high pressure territory; And
The first enable signal providing when described enable circuits is second electrical level by the first level redirect, and second makesCan signal be the first level by second electrical level redirect, when described change-over circuit quits work, latch circuit latchesLast input signal of described signal input circuit.
Further, described voltage conversion method, described in described latch cicuit is coupled in parallelChange-over circuit.
Further, described voltage conversion method, the first enable signal providing when described enable circuits isWhen the first level, described the second enable signal is second electrical level, described latch cicuit at described the first level andUnder the effect of described second electrical level, quit work; The first enable signal providing when described enable circuits is secondLevel, when described the second enable signal is the first level, described latch cicuit carries out work.
Further, described voltage conversion method, described the first level is high level, described second electrical levelFor low level.
Further, described voltage conversion method, described high level is 3.3V, 2.5V, 1.8V, andDescribed low level is 0V.
The voltage conversion method that the embodiment of the present invention provides, when first making that enable circuits provides change-over circuitWhen energy signal is the first level, change-over circuit carries out normal low-pressure region signal and turns high pressure territory signal, when enabling electricityWhen the first enable signal that road provides change-over circuit is second electrical level, change-over circuit quits work, and locks simultaneouslyDeposit last input signal of circuit latch signal input circuit. With this, the employing of technical solution of the present invention,In realizing normal low-pressure region signal and turning high pressure territory signal, realize the preservation to signal; And protectingWhen depositing signal, enable signal control change-over circuit quits work, and has promoted change-over circuit matches itsThe operating rate of its circuit; Further, latch cicuit is not serially connected on the output of change-over circuit, is enteringWhen row low-pressure region signal turns high pressure territory signal, reduce the interference to the transmission of change-over circuit signal, can not causeThe delay of change-over circuit, further reduces the speed of change-over circuit.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms one of the present inventionPoint, do not form limitation of the invention. In the accompanying drawings:
It shown in Fig. 1, is voltage conversion circuit schematic diagram in prior art;
It shown in Fig. 2, is voltage conversion circuit schematic diagram in the embodiment of the present invention one;
It shown in Fig. 3, is voltage conversion circuit schematic diagram in the embodiment of the present invention two;
Shown in Fig. 4, be when change-over circuit cuts out the work of latch cicuit while entering work in the embodiment of the present invention twoCircuit diagram;
It shown in Fig. 5, is voltage conversion method schematic flow sheet in the embodiment of the present invention three.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the present invention is carried out more in detail and complete explanation. Can manageSeparate, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, in accompanying drawing, only show part related to the present invention andNon-full content.
It shown in Fig. 2, is voltage conversion circuit schematic diagram in the embodiment of the present invention one. As shown in Figure 2, described electricityVoltage conversion circuit comprises: power circuit 201, signal input circuit 202, enable circuits 203, change-over circuit204, latch cicuit 205 and inverter circuit 206.
Power circuit 201 is for providing high voltage source and low-tension supply. Power circuit 201 produces high voltage sourceAnd low-tension supply, the high voltage source of generation and low-tension supply are respectively used to the each electricity consumption semiconductor device in circuitPart or logic unit circuit provide bias voltage, for example NMOS pipe or PMOS pipe, phase inverter in change-over circuitCircuit and transmission gate circuit etc., or turn in the signal process of high pressure territory corresponding electricity is provided at low-pressure region signalPressure value, or provide corresponding magnitude of voltage in high pressure territory signal turns low-pressure region signal process. Concrete, thisEmbodiment mesohigh power supply and low-tension supply can be 3.3V and 1.2V, 3.3V and 1.8V, 3.3V and 2.5V,2.5V and 1.8V, 2.5V and 1.2V, 2.5V and 1.8V, 1.8V and 1.2V etc.
Signal input circuit 202 is for receiving input signal and providing first signal and secondary signal. SignalInput circuit receives the low-pressure region input signal of other circuit module, and works as voltage conversion circuit and obtain relevantAfter the low-pressure region signal that circuit module sends, after the signal input circuit 202 of voltage conversion circuit, form firstSignal and secondary signal. For example,, when change-over circuit is outside for changing the low-pressure region signal of internal digital signalWhen the needed high pressure of portion's analog signal territory signal is changed, now internal digital signal formation is a low pressureTerritory signal; Low-pressure region signal is sent to this enforcement between digital circuit and analog circuit by internal digital circuitVoltage conversion circuit in example, the signal input circuit 202 of voltage conversion circuit receive digital circuit sendAfter low-pressure region input signal, form first signal and secondary signal.
Enable circuits 203 is for receiving enable signal and providing the first enable signal and the second enable signal.In the present embodiment, voltage conversion circuit need to apply corresponding signal to it in the time that needs carry out work, and then controlVoltage conversion circuit processed enters normal duty. In the present embodiment, the existence of enable circuits 203 that is to sayIt is electric to conversion by enable circuits 203 in the time that needs voltage conversion circuit provides voltage transitions or stop normally workingThe first enable signal that road 204 provides, the first level providing at the first enable signal or second electrical level are doneEnter duty or in the state of quitting work with lower control change-over circuit 204; For example,, when conversion electricityThe first enable signal that road provides in enable circuits 203 enters normal low-pressure region signal and turns while being the first levelHigh pressure territory signal, after the first enable signal providing in enable circuits 203 is the first level, change-over circuitEnter normal low-pressure region signal and turn high pressure territory signal.
Concrete, when the first enable signal providing when enable circuits 203 in the present embodiment is the first level,The second enable signal is second electrical level, and latch cicuit 205 stops under the effect of the first level and second electrical levelWork; The first enable signal providing when enable circuits 203 is second electrical level, and the second enable signal is firstWhen level, latch cicuit 205 carries out work. Be the first electricity when enable circuits 203 provides the first enable signalPut down while making change-over circuit work, the first level of the first enable signal and the second electrical level of the second enable signal makeLatch cicuit 205 quits work, and then latch cicuit 205 in off working state has been avoided changing electricityThe interference on road, and then promoted the speed of change-over circuit, and reduced the power consumption of voltage conversion circuit.
Further, in the present embodiment, in the time that the first level is high level, second electrical level is low level; WithAnd in the time that the first level is low level, second electrical level is high level, for example high level and low level can be 3.3VWith 1.2V, 3.3V and 1.8V, 3.3V and 2.5V, 2.5V and 1.8V, 3.3V and OV, 2.5V and 1.2V,2.5V and 1.8V, 2.5V and 0V, 1.8V and 1.2V etc.
Further, in the present embodiment, high level is 3.3V, and low level is 0V.
Change-over circuit 204 for the first enable signal providing to change-over circuit 204 when enable circuits 203 isWhen the first level, input signal under high voltage source and low-tension supply effect through change-over circuit 204 and phase inverterThe rear output high pressure of circuit 206 territory signal, realizes the conversion of input signal from low-pressure region to high pressure territory. Low-pressure regionInput signal refers to the signal with respect to the input signal forming after conversion with lower of-state voltage, high pressure territoryVoltage signal refer to conversion before with respect to the input signal after turning with low voltage, for example high pressure territory signal andLow-pressure region signal can be 3.3V and 1.2V, 3.3V and 1.8V, 3.3V and 2.5V, 2.5V and 1.8V,2.5V and 1.2V, 2.5V and 1.8V, 1.8V and 1.2V etc. What change-over circuit 204 was realized is to low-pressure regionSignal is converted to high pressure territory signal or high pressure territory signal is converted to low-pressure region signal, that is to say in enable circuits 203Under the effect of the first level of the first enable signal providing, change-over circuit enters normal duty; AndUnder the first signal that signal input circuit 202 provides and secondary signal effect, through change-over circuit 204 and anti-phaseDevice circuit 206 is realized the low-pressure region signal of input signal is transferred to high pressure territory signal or high pressure territory signal transfers toLow-pressure region signal. For example, external analog circuitry need provide a high pressure territory signal, and when enable circuits 203When the first enable signal providing is the first level, change-over circuit turns high pressure territory letter in normal low-pressure region signalNumber; Be the first level at the first enable signal that change-over circuit 204 is provided, signal input circuit 202The first signal and the secondary signal that form act on after change-over circuit 204, and change-over circuit 204 is entered normallyDuty, realize low-pressure region signal and turn high pressure territory signal.
Concrete, in the present embodiment, when the first enable signal providing to enable circuits 203 is second electrical levelTime, the change-over circuit 204 in normal operating conditions quits work. With this, when not needing change-over circuit204 while carrying out voltage transitions, and enable circuits 203 is second electrical level control change-over circuit by the first enable signalQuit work. Because partial circuit module in voltage conversion circuit quits work, reduce the energy consumption of change-over circuit,And promoted the speed of voltage conversion circuit simultaneously.
Latch cicuit 205 for the first enable signal providing when enable circuits 203 by the first level redirect isSecond electrical level, the second enable signal is the first level by second electrical level redirect, change-over circuit 204 quits workTime, latch cicuit 205 last input signal of latch signal input circuit 202 simultaneously. Latch cicuitThe 205th, realize the circuit unit that signal in circuit is carried out to latch, when needs carry out latch to certain signal of circuitTime, by access in the corresponding way latch cicuit 205 in circuit, just can realize the lock to signal in circuitDeposit. The first level redirect of the first enable signal providing when enable circuits 203 in the present embodiment, isTwo level, in the out-of-work while of second electrical level control change-over circuit, latch cicuit 205 latch signals are defeatedEnter last input signal of circuit. Because the last input signal to change-over circuit 204 is realizedLatch, when internal digital circuit, external analog circuitry or other circuit being connected with voltage conversion circuitUnit, while needing the signal of this latch, just can transfer to this signal by latch cicuit 205 accordinglyCircuit voltage.
Preferably, in the present embodiment, latch cicuit 205 is coupled to change-over circuit and phase inverter in parallelOn the path that circuit 206 is connected. By mode in parallel, latch cicuit is coupled on change-over circuit, keeps awayExempt from the impact of latch cicuit on output signal, and then the speed that has promoted signal transmission or processed.
Inverter circuit 206 is made up of phase inverter, for realizing the reverse process of the signal to voltage.
The voltage conversion method that the embodiment of the present invention provides, when first making that enable circuits provides change-over circuitWhen energy signal is the first level, change-over circuit carries out normal low-pressure region signal and turns high pressure territory signal, when enabling electricityWhen the first enable signal that road provides change-over circuit is second electrical level, change-over circuit quits work, and locks simultaneouslyDeposit last input signal of circuit latch signal input circuit. With this, the employing of technical solution of the present invention,In realizing normal low-pressure region signal and turning high pressure territory signal, realize the preservation to signal; And protectingWhen depositing signal, enable signal control change-over circuit quits work, and has promoted change-over circuit matches itsThe operating rate of its circuit; Further, latch cicuit is not serially connected on the output of change-over circuit, is enteringWhen row low-pressure region signal turns high pressure territory signal, reduce the interference to the transmission of change-over circuit signal, can not shine intoThe delay of change-over circuit, further reduces the speed of change-over circuit.
It shown in Fig. 3, is voltage conversion circuit schematic diagram in the embodiment of the present invention two. As shown in Figure 3, described electricityVoltage conversion circuit comprises:
Power circuit 301, signal input circuit 302, enable circuits 303, change-over circuit 304, latch electricityRoad 305 and inverter circuit 306; Wherein said inverter circuit comprises the 7th phase inverter 3061.
Power circuit 301 is for providing high voltage source and low-tension supply. Power circuit 301 produces high voltage sourceAnd low-tension supply, the high voltage source of generation and low-tension supply are respectively used to the each electricity consumption semiconductor device in circuitPart or logic unit circuit provide bias voltage, for example NMOS pipe or PMOS pipe, phase inverter in change-over circuitCircuit and transmission gate circuit etc., or turn in the signal process of high pressure territory corresponding electricity is provided at low-pressure region signalPressure value, or provide corresponding magnitude of voltage in high pressure territory signal turns low-pressure region signal process. Concrete, thisEmbodiment mesohigh power supply and low-tension supply can be 3.3V and 1.2V, 3.3V and 1.8V, 3.3V and 2.5V,2.5V and 1.8V, 2.5V and 1.2V, 2.5V and 1.8V, 1.8V and 1.2V etc.
Preferably, in the present embodiment, high voltage source VCCH is 3.3V, and low-tension supply VCCL is 1.2V. ItsMesohigh power supply VCCH provides supply voltage for change-over circuit 304, enable circuits 303 and latch cicuit 305Or bias voltage; Low-tension supply VCCL provides supply voltage or bias voltage for signal input circuit 302.
Signal input circuit 302 is for receiving input signal and providing first signal and secondary signal. SignalInput circuit receives the low-pressure region input signal of other circuit module, and works as voltage conversion circuit and obtain relevantAfter the low-pressure region signal that circuit module sends, after the signal input circuit 302 of voltage conversion circuit, form firstSignal and secondary signal. For example,, when change-over circuit is outside for changing the low-pressure region signal of internal digital signalWhen the needed high pressure of portion's analog signal territory signal is changed, now internal digital signal formation is a low pressureTerritory signal; Low-pressure region signal is sent to this enforcement between digital circuit and analog circuit by internal digital circuitVoltage conversion circuit in example, signal input circuit 302 received data circuits of voltage conversion circuit sendAfter low-pressure region input signal, form first signal and secondary signal.
Concrete, in the present embodiment, signal input circuit 302 comprises the first phase inverter 3021 and is series atThe second phase inverter 3022 of the first phase inverter 3021; Wherein, input signal A is after the first phase inverter 3021First signal AB is provided, after the second phase inverter 3022, provides secondary signal AA. That is to say at node m placeFirst signal AB is provided, provides secondary signal AA at node n place, and when input signal A be positive voltage value,While being 1.2V as A, after the first phase inverter 3021, first signal AB is 0V, through the first phase inverter 3021Rear secondary signal AA is 1.2V with the second phase inverter 3022.
Enable circuits 303 is for receiving enable signal and providing the first enable signal and the second enable signal.In the present embodiment, voltage conversion circuit need to apply corresponding signal to it in the time that needs carry out work, and then controlVoltage conversion circuit processed enters normal duty. In the present embodiment, the existence of enable circuits 303 that is to sayIt is electric to conversion by enable circuits 303 in the time that needs voltage conversion circuit provides voltage transitions or stop normally workingThe first enable signal that road provides, under the first level or second electrical level effect providing at the first enable signalControl change-over circuit and enter duty or in the state of quitting work; For example,, when change-over circuit 304 existsThe first enable signal that enable circuits 303 provides enters normal low-pressure region signal and turns high pressure while being the first levelTerritory signal, after the first enable signal providing in enable circuits 303 is the first level, change-over circuit 304Enter normal low-pressure region signal and turn high pressure territory signal.
Concrete, when the first enable signal providing when enable circuits 303 in the present embodiment is the first level,The second enable signal is second electrical level, and latch cicuit quits work under the effect of the first level and second electrical level;The first enable signal providing when enable circuits 303 is second electrical level, when the second enable signal is the first level,Latch cicuit 305 carries out work. Be that the first level makes conversion when enable circuits 303 provides the first enable signalWhen circuit working, the first level of the first enable signal and the second electrical level of the second enable signal make latch cicuitQuit work, and then latch cicuit 305 in off working state avoids the interference to change-over circuit 304,And then promoted the speed of change-over circuit 304, and reduce the power consumption of voltage conversion circuit.
Further, in the present embodiment, in the time that the first level is high level, second electrical level is low level; WithAnd in the time that the first level is low level, second electrical level is high level, for example high level and low level can be 3.3VWith 1.2V, 3.3V and 1.8V, 3.3V and 2.5V, 2.5V and 1.8V, 3.3V and OV, 2.5V and 1.2V,2.5V and 1.8V, 2.5V and 0V, 1.8V and 1.2V etc.
Further, in the present embodiment, high level is 3.3V, and low level is 0V.
In the present embodiment, enable circuits 303 comprises the 3rd phase inverter 3031 and is series at the 3rd phase inverter3031 the 4th phase inverter 3032; Wherein, enable signal EN provides second to make after the 3rd phase inverter 3031Energy signal ENB provides the first enable signal ENA after the 4th phase inverter 3032. With this, in the present embodimentIn the time that enable signal EN is high level 3.3V, the second electrical level of the second enable signal ENB is 0V, firstThe first level that enables No. ENA, letter is 3.3V; In the time that EN is low level 0V, the second enable signal ENBThe first level be 3.3V, the second electrical level of the first enable signal ENA is 0V.
Change-over circuit 304 for the first enable signal providing to change-over circuit 304 when enable circuits 303 isWhen the first level, input signal under high voltage source and low-tension supply effect through change-over circuit 304 and phase inverterThe rear output high pressure of circuit 306 territory signal, realizes the conversion of input signal from low-pressure region to high pressure territory. Conversion electricityWhat realized on road 304 is is converted to high pressure territory signal or high pressure territory signal is converted to low-pressure region letter to low-pressure region signalNumber, that is to say that under the effect of the first level of the first enable signal providing in enable circuits, shifting circuit just entersNormal duty; And under the first signal providing at signal input circuit and secondary signal effect, it is right to realizeThe low-pressure region signal of input signal transfers high pressure territory signal to or high pressure territory signal transfers low-pressure region signal to. For example,External analog circuitry need provide a high pressure territory signal, and first enables letter when what enable circuits 303 providedWhile number being the first level, change-over circuit turns high pressure territory signal in normal low-pressure region signal; To changing electricityThe first enable signal that road 304 provides is the first level, the first signal and second that signal input circuit formsSignal function, after change-over circuit, makes change-over circuit 304 enter normal duty, realizes low-pressure region letterNumber turn high pressure territory signal.
Concrete, in the present embodiment, when the first enable signal providing to change-over circuit 304 is second electrical levelTime, the change-over circuit 304 in normal operating conditions quits work. With this, when not needing change-over circuit304 while carrying out voltage transitions, and enable circuits 303 is second electrical level control change-over circuit by the first enable signalQuit work. Because partial circuit module in voltage conversion circuit quits work, reduce the energy consumption of change-over circuit,And promoted the speed of voltage conversion circuit simultaneously.
In the present embodiment, change-over circuit 304 comprises the first metal-oxide-semiconductor 3041, the second metal-oxide-semiconductor 3042, the 3rd MOSPipe 3043, the 4th metal-oxide-semiconductor 3044, the 5th metal-oxide-semiconductor 3045 and the 6th metal-oxide-semiconductor 3046;
The grid of the 6th metal-oxide-semiconductor 3046 is as the first input end of change-over circuit, for receiving first signal;The grid of the 5th metal-oxide-semiconductor 3045 is as the second input of change-over circuit, for receiving secondary signal; The 5thAfter the source electrode of metal-oxide-semiconductor 3045 and the 6th metal-oxide-semiconductor 3046 couples, for coupling earth terminal;
The source electrode of the 3rd metal-oxide-semiconductor 3043 is coupled to the drain electrode of the 5th metal-oxide-semiconductor 3045, the 4th metal-oxide-semiconductor 3044Source electrode be coupled to the drain electrode of the 6th metal-oxide-semiconductor 3046; The grid of the 3rd metal-oxide-semiconductor 3043 and the 4th metal-oxide-semiconductor3044 grid is coupled, and for coupling the output of enable circuits the first enable signal; The 3rd metal-oxide-semiconductor3043 drain electrode is coupled to the source electrode of the first metal-oxide-semiconductor 3041 and the grid of the second metal-oxide-semiconductor 3042, and forCouple the second latch terminal of inverter circuit 306 and latch cicuit 305; The drain electrode of the 4th metal-oxide-semiconductor 3044Be coupled to the grid of the first metal-oxide-semiconductor 3041, the source electrode of the second metal-oxide-semiconductor 3042, and for coupling latch electricityThe first latch terminal on road;
The drain electrode of the first metal-oxide-semiconductor 3041 couples mutually with the drain electrode of the second metal-oxide-semiconductor 3042, and high for receivingVoltage source. Those skilled in the art should understand that be the source electrode of above-mentioned each metal-oxide-semiconductor and the division of drain electrode alsoBe not used in the setting that limits metal-oxide-semiconductor source electrode and drain electrode, can have different settings according to the difference of manufacturer,That is to say that above-mentioned source electrode and drain electrode can be the two poles of the earth of mutually replacing for same metal-oxide-semiconductor.
Preferably, described the first metal-oxide-semiconductor and the second metal-oxide-semiconductor are PMOS pipe, described the 3rd metal-oxide-semiconductor, the 4thMetal-oxide-semiconductor, the 5th metal-oxide-semiconductor and the 6th metal-oxide-semiconductor are NMOS pipe.
Latch cicuit 305 for the first enable signal providing when enable circuits 303 by the first level redirect isSecond electrical level, the second enable signal is the first level by second electrical level redirect, when change-over circuit quits work,Latch cicuit 305 last input signal of latch signal input circuit 302 simultaneously. Latch cicuit 305To realize the circuit unit that signal in circuit is carried out to latch, in the time that needs carry out latch to certain signal of circuit,By access in the corresponding way latch cicuit in circuit, just can realize the latch to signal in circuit. ?In the present embodiment, the first level redirect of the first enable signal providing when enable circuits 303 is second electrical level,In the 304 out-of-work whiles of second electrical level control change-over circuit, latch cicuit 305 latch change-over circuits 304Last output signal. Because a last output signal of change-over circuit 304 has been realized to latch,When interior digital circuit, external analog circuitry or other circuit units being connected with voltage conversion circuit, needWhen the signal of this latch, just can this signal be transferred to corresponding circuit voltage by latch cicuit.
Preferably, in the present embodiment, latch cicuit 305 is coupled in the defeated of change-over circuit 304 in parallelGo out on end. By mode in parallel, latch cicuit is coupled on the output of change-over circuit, has avoided latchThe impact of circuit 305 on signal, and then the speed that signal transmission is provided or has processed.
Concrete, in this example, latch cicuit comprises the 5th phase inverter 3053, is series at the of the 5th reverserOne transmission gate circuit 3054, hex inverter 3051 and be series at the second transmission gate circuit of hex inverter3052；
The 5th phase inverter 3053 is coupled to the second transmission gate circuit 3052, forms the first latch terminal, for couplingConnect change-over circuit 304; Hex inverter 3051 is coupled to the first transmission gate circuit 3054, forms the second latchTerminal, for coupling change-over circuit 304 and inverter circuit 306.
Preferably, in the present embodiment, latch cicuit is coupled on the output of change-over circuit in parallel.By mode in parallel, latch cicuit is coupled on the output of change-over circuit, has avoided latch cicuit to letterNumber impact, and then provide signal transmission or the speed of processing.
With this, in the present embodiment, be 3.3V when voltage source provides high voltage source VCCH, low-tension supply VCCLFor 1.2V, when enable signal EN is 3.3V, if applied signal voltage A is 1.2V, secondary signal AAFor 1.2V, first signal AB is 0V. Because enable signal EN is 3.3V, the first electricity of the first enable signalPut down as 3.3V, make the 3rd metal-oxide-semiconductor 3043 and the 4th metal-oxide-semiconductor 3044 conductings, while secondary signal AA's1.2V voltage makes the 5th metal-oxide-semiconductor 3045 conductings, and NET1 is low 0V, that is to say the first latch terminal place voltageFor 0V; Because NET1 is 0V, make the second metal-oxide-semiconductor 3042 conductings, and then to make NET2 be 3.3V, alsoBe that the second latch terminal place voltage is 3.3V. Further, the second enable signal of enable circuits is secondLevel is 0V, at the second electrical level of the second enable signal and first level of the first enable signal of enable circuitsEffect under the first transmission gate gate circuit and the second transmission gate circuit close, the OV voltage signal of NET1 is through the 7thAfter phase inverter 3061, output Yout exports 3.3V high pressure territory signal again, and then realizes output signal voltage YoutFor high level 3.3V, thereby realize the low high function that turns. If input signal A is 0V, above signalAll contrary, but the first transmission gate circuit and the second transmission gate circuit be still in closed condition, output signal electricityPressure Yout is 0V. It will be understood by those skilled in the art that because digital circuit is generally by high bit level (workMake level) and zero level arrange and obtain with certain timing distribution. Therefore, in the time carrying out voltage transitions, whenWhen the virtual voltage of zero level is greater than 0V, realize the voltage transitions to high bit level and zero level simultaneously; WhenWhen zero level equals 0V or is less than 0V, in the time changing, only there is high bit level (operation level)Conversion.
In the time that enable signal EN becomes 0V by 3.3V, the first enable signal by the first level 3.3V redirect isSecond electrical level 0V, the second enable signal is the first level 3.3V by second electrical level 0V redirect, now input letterLast signal of number secondary signal AA of A after input signal circuit 302 is through the 5th MOS of conducting statePipe, the 3rd metal-oxide-semiconductor and the second metal-oxide-semiconductor are passed to NET2, that is to say the second latch terminal place of latch cicuit,And the latch cicuit that simultaneously carries out work after because of the first enable signal and the second enable signal level conversionUnder 305 effects, this last signal of latch, has realized the latch to last input signal. And then,The 3rd metal-oxide-semiconductor 3043, the 4th metal-oxide-semiconductor 3044 end, and then the first metal-oxide-semiconductor 3041, the second metal-oxide-semiconductor3042, the 3rd metal-oxide-semiconductor 3043, the 4th metal-oxide-semiconductor 3044, the 5th metal-oxide-semiconductor 3045 and the 6th metal-oxide-semiconductor 3046The change-over circuit of composition quits work, and the first transmission gate circuit and the second transmission gate circuit are led from closing to becomeLogical, formed by the first transmission gate circuit, the second transmission gate circuit, the 5th phase inverter and hex inverterLatch cicuit enters work, and latch circuit latches last input signal of input signal circuit.
Shown in Fig. 4, be when change-over circuit cuts out the circuit of latch cicuit while entering work in the embodiment of the present invention twoSchematic diagram. As shown in Figure 4, now only have power circuit 301, latch cicuit 305, enable circuits 303And inverter circuit 306 is in running order.
The voltage conversion circuit that the embodiment of the present invention provides, when first making that enable circuits provides change-over circuitWhen energy signal is the first level, change-over circuit carries out normal low-pressure region signal and turns high pressure territory signal, when enabling electricityWhen the first enable signal that road provides change-over circuit is second electrical level, change-over circuit quits work, and locks simultaneouslyDeposit last input signal of circuit latch signal input circuit. With this, the employing of technical solution of the present invention,In realizing normal low-pressure region signal and turning high pressure territory signal, realize the preservation to signal; And protectingWhen depositing signal, enable signal control change-over circuit quits work, and has promoted change-over circuit matches itsThe operating rate of its circuit; Further, latch cicuit is not serially connected on the output of change-over circuit, is enteringWhen row low-pressure region signal turns high pressure territory signal, reduce the interference to the transmission of change-over circuit signal, can not shine intoThe delay of change-over circuit, further reduces the speed of change-over circuit.
It shown in Fig. 5, is voltage conversion method schematic flow sheet in the embodiment of the present invention three. To method in this exampleUnderstanding and the explanation of noun, concept please refer to the description in the embodiment of the present invention one and embodiment bis-, for makingNot concise and to the point and clear not the repeating them here to elaboration of the present invention. As shown in Figure 5, described method comprises:
Step 501, change-over circuit receive first signal and the secondary signal that input circuit provides, and enable electricityThe first enable signal that road provides and the second enable signal;
When step 502, the first enable signal providing to change-over circuit when enable circuits are the first level, inputSignal is exported high pressure territory letter under high voltage source and low-tension supply effect after change-over circuit and inverter circuitNumber, realize the conversion of input signal from low-pressure region to high pressure territory;
Step 503, the first enable signal providing when enable circuits are second electrical level by the first level redirect, theTwo enable signals are the first level by second electrical level redirect, when change-over circuit quits work, and latch circuit latchesLast input signal of signal input circuit.
Preferably, in the present embodiment, when the first enable signal providing when enable circuits is the first level,Two enable signals are second electrical level, and latch cicuit quits work under the effect of the first level and second electrical level;The first enable signal providing when enable circuits is second electrical level, when the second enable signal is the first level, and lockDeposit circuit and carry out work.
Preferably, in the present embodiment, in the time that the first level is high level, second electrical level is low level.
Preferably, in the present embodiment, high level is 3.3V, and low level is 0V.
The voltage conversion method that the embodiment of the present invention provides, when first making that enable circuits provides change-over circuitWhen energy signal is the first level, change-over circuit carries out normal low-pressure region signal and turns high pressure territory signal, when enabling electricityWhen the first enable signal that road provides change-over circuit is second electrical level, change-over circuit quits work, and locks simultaneouslyDeposit last input signal of circuit latch signal input circuit. With this, the employing of technical solution of the present invention,In realizing normal low-pressure region signal and turning high pressure territory signal, realize the preservation to signal; And protectingWhen depositing signal, enable signal control change-over circuit quits work, and has promoted change-over circuit matches itsThe operating rate of his circuit; Further, latch cicuit is not serially connected on the output of change-over circuit, is enteringWhen row low-pressure region signal turns high pressure territory signal, reduce the interference to the transmission of change-over circuit signal, can not shine intoThe delay of change-over circuit, further reduces the speed of change-over circuit.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for this area skillArt personnel, the present invention can have various changes and variation. All within spirit of the present invention and principle instituteDo any amendment, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (15)
1. a voltage conversion circuit, is characterized in that, comprising:
Inverter circuit;
Signal input circuit, for receiving input signal and providing first signal and secondary signal;
Power circuit, for providing high voltage source and low-tension supply;
Enable circuits, for receiving enable signal and providing the first enable signal and the second enable signal;
Change-over circuit is for the first enable signal providing to described change-over circuit when described enable circuitsWhen one level, input signal under described high voltage source and described low-tension supply effect through described change-over circuit andAfter described inverter circuit, export high pressure territory signal, realize the conversion of input signal from low-pressure region to high pressure territory;
Latch cicuit is for the first enable signal of providing when described enable circuits by the first level redirectTwo level, the second enable signal is the first level by second electrical level redirect, when described change-over circuit quits work,Last input signal of signal input circuit described in described latch circuit latches.
2. voltage conversion circuit as claimed in claim 1, is characterized in that, described latch cicuit is with parallel connectionMode be coupled to described change-over circuit.
3. voltage conversion circuit as claimed in claim 1, is characterized in that, when described enable circuits providesThe first enable signal while being the first level, described the second enable signal is second electrical level, described latch cicuitUnder the effect of described the first level and described second electrical level, quit work; When described enable circuits provideOne enable signal is second electrical level, and when described the second enable signal is the first level, described latch cicuit carries outWork.
4. voltage conversion circuit as claimed in claim 3, is characterized in that, described the first level is high electricityFlat, described second electrical level is low level.
5. voltage conversion circuit as claimed in claim 4, is characterized in that, described high level be 3.3V,2.5V or 1.8V, and described low level is 0V.
6. voltage conversion circuit as claimed in claim 1, is characterized in that, described signal input circuit bagDraw together:
The first phase inverter and be series at the second phase inverter of described the first phase inverter; Wherein, input signal warpAfter described the first phase inverter, provide first signal, after the second phase inverter, provide secondary signal.
7. voltage conversion circuit as claimed in claim 1, is characterized in that, described enable circuits comprises:
The 3rd phase inverter and be series at the 4th phase inverter of described the 3rd phase inverter; Wherein, enable signal warpAfter described the 3rd phase inverter, provide the second enable signal, after the 4th phase inverter, provide the first enable signal.
8. voltage conversion circuit as claimed in claim 1, is characterized in that, described change-over circuit comprises:The first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, the 5th metal-oxide-semiconductor and the 6th MOSPipe;
The grid of described the 6th metal-oxide-semiconductor is as the first input end of described change-over circuit, for receiving the first letterNumber; The grid of described the 5th metal-oxide-semiconductor is as the second input of described change-over circuit, for receiving the second letterNumber; After the source electrode of described the 5th metal-oxide-semiconductor and described the 6th metal-oxide-semiconductor couples, for coupling earth terminal;
The even drain electrode that is connected to described the 5th metal-oxide-semiconductor of source electrode of described the 3rd metal-oxide-semiconductor, described the 4th metal-oxide-semiconductorSource electrode is coupled to the drain electrode of described the 6th metal-oxide-semiconductor; The drain electrode of described the 4th metal-oxide-semiconductor is coupled to a described MOSThe source electrode of the second metal-oxide-semiconductor described in the grid of pipe, and for coupling latch cicuit; The grid of described the 3rd metal-oxide-semiconductorThe grid of the utmost point and described the 4th metal-oxide-semiconductor is coupled, and for coupling enable circuits; Described the 3rd metal-oxide-semiconductorDrain electrode is coupled to the source electrode of described the first metal-oxide-semiconductor and the grid of described the second metal-oxide-semiconductor, and anti-phase for couplingDevice circuit and latch cicuit;
The drain electrode of described the first metal-oxide-semiconductor couples mutually with the drain electrode of described the second metal-oxide-semiconductor, and for receiving high pressurePower supply.
9. voltage conversion circuit as claimed in claim 8, is characterized in that, described the first metal-oxide-semiconductor andTwo metal-oxide-semiconductors are PMOS pipe, described the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, the 5th metal-oxide-semiconductor and the 6th metal-oxide-semiconductorFor NMOS pipe.
10. voltage conversion circuit as claimed in claim 1, its feature is being, described latch cicuit bagDraw together:
The 5th phase inverter, be series at the first transmission gate circuit, hex inverter and the string of described the 5th phase inverterBe coupled to the second transmission gate circuit of described hex inverter;
Described the 5th phase inverter is coupled to described the second transmission gate circuit, forms the first latch terminal, for couplingConnect change-over circuit; Described hex inverter is coupled to described the first transmission gate circuit, forms the second latch terminal,Be used for coupling change-over circuit and inverter circuit.
11. 1 kinds of voltage conversion methods, is characterized in that, comprising:
Change-over circuit receives first signal and the secondary signal that signal input circuit provides, and enable circuits is carriedThe first enable signal of confession and the second enable signal;
When the first enable signal providing to described change-over circuit when described enable circuits is the first level, inputSignal is exported high pressure territory under high voltage source and low-tension supply effect after described change-over circuit and inverter circuitSignal, realizes the conversion of input signal from low-pressure region to high pressure territory; And
The first enable signal providing when described enable circuits is second electrical level by the first level redirect, and second makesCan signal be the first level by second electrical level redirect, when described change-over circuit quits work, latch circuit latchesLast input signal of described signal input circuit.
12. voltage conversion methods as claimed in claim 11, is characterized in that, described latch cicuit is with alsoThe mode of connection is coupled to described change-over circuit.
13. voltage conversion methods as claimed in claim 11, is characterized in that, when described enable circuits is carriedWhen the first enable signal of confession is the first level, described the second enable signal is second electrical level, described latch electricityRoad quits work under the effect of described the first level and described second electrical level; When described enable circuits providesThe first enable signal is second electrical level, and when described the second enable signal is the first level, described latch cicuit entersRow work.
14. voltage conversion methods as described in as arbitrary in claim 11 or 13, is characterized in that describedOne level is high level, and described second electrical level is low level.
15. voltage conversion methods as claimed in claim 14, is characterized in that, described high level be 3.3V,2.5V or 1.8V, and described low level is 0V.
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| EP3975425A3 (en) * | 2020-09-29 | 2022-06-08 | MediaTek Inc. | Level converting enable latch |
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| CN105763172B (en) * | 2016-02-03 | 2018-07-17 | 中国电子科技集团公司第二十四研究所 | High-speed low-power-consumption trigger |
| CN106528250B (en) * | 2016-12-02 | 2019-01-18 | 武汉新芯集成电路制造有限公司 | Dual power supply programming level generating circuit |
| CN108762458B (en) * | 2018-05-31 | 2021-08-06 | 郑州云海信息技术有限公司 | Method and device for simultaneously realizing on-off control and voltage conversion of circuit |
| CN109936359B (en) * | 2019-02-19 | 2021-03-26 | 杭州晶华微电子股份有限公司 | Low-power-consumption bidirectional digital level conversion circuit and chip |
| CN115620758A (en) * | 2021-07-16 | 2023-01-17 | 长鑫存储技术有限公司 | Voltage conversion circuit and memory |
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