CN101102074A - Variable frequency multi-phase oscillator - Google Patents
Variable frequency multi-phase oscillator Download PDFInfo
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Abstract
A variable frequency multi-phase oscillator for providing multi-phase signals is disclosed. The variable frequency multi-phase oscillator includes a correlator, a plurality of delay cells, and a NOR circuit. Each delay cell includes a current supply, a capacitor, a comparator, a switch, and a logic unit. The plurality of delay cells generate the multi-phase signals that are phase correlated within a large frequency range. The frequency and duty cycles of the multi-phase signals are adjustable.
Description
Technical field
The present invention system is specially the multiphase oscillator that is used for power management about power management.
Background technology
Current, along with the continuous expansion of its function and application, variable frequency multi-phase oscillator is more and more universal.Variable frequency multi-phase oscillator can close general being used in the various Power Management Unit (PMU), is used to generate complicated clock signal to drive other element.In other words, variable frequency multi-phase oscillator can provide the signal of multiple phase place (heterogeneous) to give various elements, for example DC to DC converter.In actual the use, variable frequency multi-phase oscillator need provide polyphase signa coupled a plurality of elements synchronously.Oscillator decides the frequency of self usually according to one or more combination of elements in internal inductance, resistance, electric capacity or other the necessary element.
For instance, need be tunable when variable frequency multi-phase oscillator is applied among the PMU, that is to say that its output frequency is a function of control input, the control input typically refers to voltage.For example, the output frequency of voltage-controlled oscillator circuit is a function of its input control voltage.The output frequency of variable frequency multi-phase oscillator also can be subjected to the influence of the inherent delay of some inner member.
Usually, portable electric appts relies on PMU and comes to provide different voltage by single power supply (as battery) very much.Each passage of above-mentioned DC to DC converter all has a uneven electric current, and this inequality electric current is at the very first time in each cycle of phase signal section (T
ON) the interior increase, at the second time period (T in each cycle of phase signal
OFF) in reduce even drop to 0.Distribute (supply currentdistribution) in order to improve power supply, the cycle of each DC all should start from the different moment.So just need multiphase oscillator.In order to adapt to large-scale application, PMU needs to work in different frequencies, and this just must use variable frequency multi-phase oscillator.
Finish above-mentioned simultaneous operation, need take the whole bag of tricks to adjust polyphase signa, to obtain required phase association according to concrete requirement.Therefore, but DC to DC converter phase shift work, to reduce noise, relax and to avoid unwanted input inrush current to the requirement of input filtering.
The conventional method that generates polyphase signa is to use a master clock, and its frequency is N times (master clock frequency is higher than the synchronised clock frequency far away) of each synchronised clock frequency.Conventional method needs the very high master clock of frequency of utilization in order to make low frequency signal obtain less duty ratio.Use high-frequency oscillator just to mean that power dissipation is big, and the frequency adjustment difficulty.Simultaneously, use high-frequency oscillator also to make phase adjusted become complicated, can't realize single duty ratio design, make that also circuit design can't proportional zoom.
Therefore, need a kind of equipment and method a kind of variable frequency multi-phase oscillator with heterogeneous output can be provided, this variable frequency multi-phase oscillator embeds in the integrated circuit, its duty ratio control is simple, frequency range is big, the frequency adjustment configuration is simple, low in energy consumption, and does not increase the complexity of integrated circuit.Purport of the present invention just is to provide this equipment and method.
Summary of the invention
One embodiment of the present of invention provide a kind of variable frequency multi-phase oscillator that is used to generate polyphase signa.This variable frequency multi-phase oscillator comprises a correlator, a plurality of delay unit and one or non-(NOR) circuit.Correlator receives a control signal and generates a threshold voltage from the outside.A plurality of delay units are one another in series.Each delay unit all receives control signal from the outside, from correlator receive threshold voltage and generate a polyphase signa.The NOR circuit receives a plurality of polyphase signas and generates one from a plurality of delay units and outputs signal to one of them delay unit.
Another embodiment of the present invention provides a kind of variable frequency multi-phase oscillator that is used to generate polyphase signa.This variable frequency multi-phase oscillator comprises a control unit, a plurality of correlator, a plurality of delay unit and a NOR circuit.Control unit receives an input signal and generates a plurality of control signals from the outside.A plurality of correlators receive a plurality of control signals and generate a plurality of threshold voltages from control unit.A plurality of delay units are one another in series.Each delay unit is all in parallel with a correlator, and each delay unit receives a plurality of control signals one from control unit, and receives in a plurality of threshold voltages one, and generates a polyphase signa.The NOR circuit receives polyphase signa and generates one from a plurality of delay units and outputs signal to one of them delay unit.
Another embodiment of the present invention provides a kind of method that is used to generate polyphase signa, its step comprises: (a) receive a current controling signal, (b) in each delay unit, generate a threshold voltage according to current controling signal, (c) in each delay unit, generate polyphase signa according to current controling signal and threshold voltage, (d) computing polyphase signa in a NOR circuit, (e) in the NOR circuit, generate a digital signal, (f) if digital signal is high, repeat above (c) to (e) step.
Another embodiment of the present invention provides a kind of equipment.This equipment comprises a PMU and a plurality of DC to DC converter.This PMU comprises a variable frequency multi-phase oscillator and a plurality of controller.This variable frequency multi-phase oscillator comprises a correlator, a plurality of delay unit and a NOR circuit.Correlator receives a control signal and generates a threshold voltage from the outside.A plurality of delay units are one another in series.Each delay unit all receives control signal from the outside, from correlator receive threshold voltage and generate a polyphase signa.The NOR circuit receives a plurality of polyphase signas and generates one from a plurality of delay units and outputs signal to one of them delay unit.Each controller all receives a control signal.Each DC to DC converter is all by a controller control.
Another embodiment of the present invention provides a kind of wireless telecommunications system, and this wireless telecommunications system can be by a wireless communication networks and base station communication.This wireless telecommunications system comprises a controller, a radio transceiver, a user interface, a memory cell and a power subsystem.Radio transceiver is controlled by controller, by antenna and base station communication.User interface can receive the Voice ﹠ Video data and audio-visual data is shown to the user from the user.But memory cell storing audio and video data.Power subsystem is given controller, radio transceiver, user interface and memory cell power supply.Power subsystem comprises a variable frequency multi-phase oscillator.This variable frequency multi-phase oscillator comprises a correlator, a plurality of delay unit and a NOR circuit.Correlator receives a control signal and generates a threshold voltage from the outside.A plurality of delay units are one another in series.Each delay unit all receives control signal from the outside, from correlator receive threshold voltage and generate a polyphase signa.The NOR circuit receives a plurality of polyphase signas and generates one from a plurality of delay units and outputs signal to one of them delay unit.
Description of drawings
Hereinafter the embodiment of exemplary embodiments is carried out in conjunction with the following drawings, will make that advantage of the present invention is apparent.
Fig. 1 is the piece figure of the variable frequency multi-phase oscillator of a kind of constant duty ratio provided by the invention.
Fig. 2 is the piece figure of the variable frequency multi-phase oscillator of a kind of variable duty ratio provided by the invention.
Fig. 3 is the schematic diagram of the electric current-threshold value correlator of variable frequency multi-phase oscillator among Fig. 1 and Fig. 2.
Fig. 4 is the schematic diagram of a delay unit of the oscillator among Fig. 1 and Fig. 2.
Fig. 5 is a phase waveform of variable frequency multi-phase oscillator among Fig. 1.
Fig. 6 is a phase waveform of variable frequency multi-phase oscillator among Fig. 2.
[0021] Fig. 7 is a kind of piece figure that comprises the application system of variable frequency multi-phase oscillator.
Fig. 8 has been equipped with the piece figure of a kind of mobile phone of variable frequency multi-phase oscillator for power subsystem.
Embodiment
The invention provides a kind of variable frequency multi-phase oscillator, the phase place of its leggy output is interrelated.Figure 1 shows that a kind of variable frequency multi-phase oscillator 100 of constant duty ratio.This variable frequency multi-phase oscillator 100 is a kind of variable oscillator.In this embodiment, variable frequency multi-phase oscillator 100 mainly comprises an electric current-threshold value correlator 110, a plurality of delay units 120,122,124,126 and 128, and NOR circuit 130.Owing to embodiment illustrated in fig. 1ly only be used to illustrate the present invention, in order to have omitted more normally used sub-elements and/or peripheral cell in the variable frequency multi-phase oscillator 100 for simplicity.In addition, according to the difference of concrete application, can use the delay unit (being no less than 2) of any amount.
Variable frequency multi-phase oscillator 100 comprises an input port 140 and a plurality of output port 150,152,154,156 and 158.Input port 140 can receive input signal, for example an analog signal from an external module (not shown in figure 1).This analog signal can be current signal, voltage signal or the combination of the two.The frequency of this analog signal is far below the frequency of variable frequency multi-phase oscillator 100.Analog signal offers electric current-threshold value correlator 110 and a plurality of delay unit 120,122,124,126 and 128 frequencies of oscillation with control variable frequency multi-phase oscillator 100.The frequency of oscillation of variable frequency multi-phase oscillator 100 is also determined by the number of above-mentioned delay unit.
Electric current-threshold value correlator 110 can receive above-mentioned analog signal and generate a threshold voltage.This threshold voltage is transferred to a plurality of delay units 120,122,124,126 and 128 again.Delay unit 120,122,124,126 and 128 generates polyphase signa by analog signal and threshold voltage control.
The current controling end of delay unit 120 receives above-mentioned analog signal, and the threshold value control termination is received above-mentioned threshold voltage.Simultaneously, the input of delay unit 120 also receives an output signal of NOR circuit 130.Delay unit 120 is controlled by analog signal and threshold voltage and is generated phase signals (that is clock signal) at output 150.And if the inner parameter of analog signal and/or electric current-threshold value correlator 110 and delay unit 120 changes, the duty ratio of this phase signal also can change.By regulating analog signal, the inner parameter of electric current-threshold value correlator 110 and/or delay unit 120,122,124,126 and 128 also can change the frequency of oscillation of variable frequency multi-phase oscillator 100.In the real work, when the phase signal (clock signal) of output 150 when low, the phase signal of output 152 will be height, so alternately until delay unit 128, below will describe in detail.
In this embodiment, can be current signal, be used to control the frequency and the duty ratio of the polyphase signa that variable frequency multi-phase oscillator 100 generates from the analog signal of input port 140.This electric current also can be used for to an electric capacity charging in the delay unit 120.This electric capacity required time of charging promptly is defined as the time-delay of delay unit 120.There is a comparator delay unit 120 inside, can compare its input signal.Compare and to make comparator have an inherent delay.In order to keep required relation between the inherent delay that compensates comparator and the time-delay that makes electric current and delay unit 120, the threshold voltage that electric current-threshold value correlator 110 generates can be regulated automatically, hereinafter will describe in detail.
Among Fig. 1, delay unit 122,124,126 is identical with delay unit 120 with 128 configuration, so similitude such as its function does not repeat them here.
In this embodiment, NOR circuit 130 is a NOR gate.NOR gate 130 can receive a plurality of phase signals from delay unit 120,122,124,126 and 128, that is polyphase signa.These polyphase signas carry out NOR-operation by the NOR door.The phase signal (clock signal) that is provided by above-mentioned delay unit is activated then one by one.The timing of all phase signals (timing) is all reduced at 0 o'clock and is begun a new cycle again.
Fig. 2 is the variable frequency multi-phase oscillator 200 of another kind of variable duty ratio provided by the invention.Variable frequency multi-phase oscillator 200 mainly comprises a control unit 210, a plurality of electric current-threshold value correlator 110,112,114,116 and 118,120,122,124,126 and 128 and NOR circuit 130 of a plurality of delay units.Because the configuration of the electric current-threshold value correlator 110 among electric current-threshold value correlator 110,112,114,116 and 118 configuration and Fig. 1 is identical, its similar functions does not repeat them here.Equally, for simplicity, the similar configuration and the function of variable frequency multi-phase oscillator 200 are also omitted, and only describe the difference of itself and variable frequency multi-phase oscillator 100 in detail at this.
Control unit 210 receives signal, for example an analog signal from external module (not shown Fig. 2).This analog signal can be current signal, voltage signal or the combination of the two.Control unit 210 can become this analog signal conversion a plurality of control signals, a plurality of control signals to be transferred to a plurality of electric currents-threshold value correlator 110,112,114,116 and 118 and a plurality of delay unit 120,122,124,126 and 128 again.In this embodiment, control unit 210 can be any topological structure that can realize conversion of signals.Control unit 210 can use different elements to realize with various configurations, is not described further at this.In this embodiment, control unit 210 becomes a current signal with analog signal conversion.It will be understood by those skilled in the art that also but working voltage signal or electric current and voltage composite signal come Control current-threshold value correlator and continuous delay unit thereof.In the case, will adopt some specific circuit topology in the variable frequency multi-phase oscillator 200, and omit for simplicity and do not show.
The frequency of a plurality of control signals is far below the frequency of variable frequency multi-phase oscillator 200.Above-mentioned analog signal is used to control the frequency of oscillation of variable frequency multi-phase oscillator 200.In addition, the frequency of oscillation of variable frequency multi-phase oscillator 200 is also determined by the sum of delay unit.
As shown in Figure 2, each delay unit all is connected to an electric current-threshold value correlator.For example, delay unit 120 links to each other with electric current-threshold value correlator 110.Similar with it, delay unit 128 links to each other with electric current-threshold value correlator 118.As above state, the difference of electric current-threshold value correlator 110 inner parameters can influence the duty ratio of the phase signal of delay unit 120 generations.The control signal that delay unit 120 receives is the duty ratio of the phase signal of may command output 150 also.Therefore, the duty ratio of each phase signal is all controlled by the threshold voltage that control signal and corresponding delay unit receive.Therefore, the configuration of above-mentioned a plurality of electric currents-threshold value correlator makes frequency conversion rate multiphase oscillator 200 can generate the polyphase signa of different duty, and the duty ratio of each phase signal then is to keep constant.The difference of the duty ratio of each polyphase signa depends on the adjusting of threshold voltage and control signal, below will provide very detailed explanation.The frequency of oscillation of variable frequency multi-phase oscillator 200 also can change by regulating analog signal, the inner parameter of electric current-threshold value correlator 110 and/or the inner parameter of delay unit 120,122,124,126 and 128.Under certain actual conditions, the frequency of oscillation of frequency conversion rate multiphase oscillator 200 can be for constant.
Figure 3 shows that the schematic diagram of an electric current-threshold value correlator 300 of the oscillator among Fig. 1 and Fig. 2.In this embodiment, electric current-threshold value correlator 300 comprises an electric current maker 310, a current mirror 320 and a resistance 330.Electric current-threshold value correlator 300 has a Current Control port 301 and a threshold value control port 302.Current Control port 301 is input ports of electric current-threshold value correlator 300, and threshold value control port 302 is its output ports.In variable frequency multi-phase oscillator 100, Current Control port 301 receives analog signal from the external module (not shown in figure 1).In variable frequency multi-phase oscillator shown in Figure 2 200, Current Control port 301 receives a plurality of control signals one from control unit 210, and this control signal also is an analog signal.
In this embodiment, electric current maker 310 can be a P channel MOS transistor (PMOS) transistor.PMOS 310 receives above-mentioned analog signal, is converted into electric current and electric current is sent to current mirror 320.Current mirror 320 is made up of nmos pass transistor 322 and 324.Current mirror 320 generates the image current I of the resistance 330 of flowing through
MIR Resistance 330 also receives a reference voltage V
REF, this reference voltage generates (not shown among Fig. 3) by an intraware.Electric current-threshold value correlator 300 will be at threshold voltage V of its threshold value port 302 outputs
THR, its size is got by following equation (1):
V
THR＝V
REF-I
MIR*R (1)
V wherein
THRBe the threshold voltage of threshold value control port 302, V
REFBe reference voltage, I
MIRBe the image current that current mirror 320 generates, R is the resistance of resistance 330.
Above-mentioned threshold voltage depends on the inner parameter of analog signal and electric current maker 310, current mirror 320 and resistance 330.Along with the variation of analog signal and the parameter of electric current-assembly that threshold value correlator 300 inside comprise change, threshold voltage also can change.In other words, by adjusting the method adjustable threshold voltages such as parameter of analog signal and electric current-assembly that threshold value correlator 300 inside comprise, to satisfy the various requirement of polyphase signa.
Fig. 4 is the schematic diagram of a delay unit 400 of the oscillator among Fig. 1 and Fig. 2.Delay unit 400 comprises a current source 410, comparator 420, charging and a discharge circuit 430 and a rest-set flip-flop 440.Delay unit 400 has a Current Control port 401, threshold value control port 402, an input port 403 and an output port 404.In variable frequency multi-phase oscillator 100, Current Control port 401 can receive analog signal from external module, in variable frequency multi-phase oscillator 200, Current Control port 401 can receive a plurality of control signals one from control unit 210, and this control signal also is an analog signal.
In this embodiment, current source 410 can be a PMOS transistor.Similar with PMOS transistor 310, PMOS transistor 410 shown in Figure 4 receives analog signal and is converted into an electric current.
Charging and discharge circuit 430 are made up of a PMOS transistor 432 and a nmos pass transistor 434.PMOS transistor 432 is in parallel with nmos pass transistor 434.PMOS transistor 432 is as electric capacity work, and its charging interval promptly is defined as the time-delay of delay unit 400.Nmos pass transistor 434 is as control switch work.When nmos pass transistor 434 (switch 434) disconnects, in a period of time, give PMOS transistor 432 (electric capacity 432) charging from the electric current of PMOS transistor 410.When nmos pass transistor 434 (switch 434) is closed, 432 discharges of PMOS transistor.Like this, charging and discharge circuit 430 just can generate a sawtooth signal.
After comparing sawtooth waveforms and threshold voltage, comparator 420 can generate a digital signal.When sawtooth waveforms during greater than threshold voltage, comparator 420 formation logics 1.On the contrary, when sawtooth waveforms during less than threshold voltage, comparator 420 formation logics 0.
Rest-set flip-flop 440 is made up of NAND gate (NAND) 442,444 and 446.Rest-set flip-flop 440 receives an input signal and generates a phase signal at output port 404 at input port 403 from comparator 420 receiving digital signals.Rest-set flip-flop 440 also generates a control signal and is used to control nmos pass transistor 434.When the grid of nmos pass transistor 434 was controlled by logical zero, just when NAND door 446 output logics 0, nmos pass transistor 434 disconnected.In the case, PMOS transistor 432 is by the current charges from PMOS transistor 410.When the PMOS transistor was charged to both end voltage greater than threshold voltage, comparator 420 was with formation logic 1.This moment input port 403 be input as logical zero, NAND door 442 formation logics 1, NAND door 444 formation logics 1.
In contrast, when NAND door 446 output logics 1, nmos pass transistor 434 closures are 0 so PMOS transistor 432 discharges into both end voltage.When sawtooth signal during less than threshold voltage, comparator 420 is with formation logic 0.Rest-set flip-flop 440 receives logical zero will be at output port 404 formation logics 0.
The internal configurations of comparator 420 can produce an inherent delay.In order to compensate the inherent delay of comparator 420, the threshold voltage of threshold value control port 402 can be done corresponding adjusting, so that keep required relation between electric current and the time-delay.The adjusting of threshold voltage is that the parameter by the intraware of the analog signal that changes Current Control port 401 and electric current-threshold value correlator 300 shown in Figure 3 realizes.After using this compensation technique, polyphase signa will obtain the required phase place that is associated.
As above state, be used for depending on above-mentioned analog signal to the electric current (charging current) of electric capacity 432 chargings and the threshold voltage of comparator 420.Like this, the frequency of this analog signal can influence the threshold voltage of charging current and comparator 420.In other words, the frequency of analog signal can change charging current and threshold voltage.Like this, the non-inverting input of comparator 420 just can obtain to have the sawtooth signal of certain uniform amplitude.
Fig. 5 is phase waveform Figure 50 0 of variable frequency multi-phase oscillator 100 shown in Figure 1.Phase waveform 500 has been described the waveform of phase signal of the output of delay unit 120,122,124,126 and 128.Curve 510,512,514,516 and 518 is respectively the phase signal of output 150,152,154,156 and 158.Phase signal is a time graph for the high time that continues.The phase signal of above-mentioned all delay unit all has identical time graph, and the phase shift pulse of all delay units has identical variable frequency and fixing duty ratio.When phase signal 510 when low, phase signal 512 will become height, so until phase signal 518.All phase signals are all reduced at 0 o'clock and are begun a new cycle again.
Fig. 6 is phase waveform Figure 60 0 of variable frequency multi-phase oscillator 200 shown in Figure 2.Phase waveform Figure 60 0 has described the phase signal of the output of delay unit 120,122,124,126 and 128.Curve 610,612,614,616 and 618 is respectively the phase signal of output 150,152,154,156 and 158.The phase shift pulse of above-mentioned all delay unit all has fixing duty ratio separately, and its time graph is inhomogeneous.According to the difference of the intraware parameter of variable frequency multi-phase oscillator 200, the frequency of each phase signal can change also can be constant.When the timing of phase signal 610 stopped, the timing of phase signal 612 began, so until phase signal 618.When reducing to 0, all phase signals begin again a new cycle.
Figure 7 shows that a kind of application system 700.This application system 700 comprises a PMU 710, a resistance 718 and an a plurality of DC to DC converter 740,742,744 and 746.PMU 710 can drive dissimilar DC to DC converter, for example buck converter, booster converter and buck-boost converter.
PMU 710 comprises a reference voltage maker 712, comparator 714, PMOS transistor 716, a variable frequency multi-phase oscillator 720 and an a plurality of controller 730,732,734 and 736.Reference voltage maker 712 is used to generate a reference voltage.Comparator 714, PMOS transistor 716 and resistance 718 can convert reference voltage to an electric current.Variable frequency multi-phase oscillator 720 is by from the Current Control of PMOS transistor 716 and generate a plurality of polyphase signas (clock signal) and give controller 730,732,734 and 736.Each controller receives a clock signal and controls a DC to DC converter.Like this, above-mentioned clock signal just can be used for driving and synchronous a plurality of DC to DC converter.In this embodiment, controller 740 and 742 is a buck converter, and controller 744 is the buck-boost converter, and controller 746 is a booster converter.A plurality of DC to DC converter can provide required direct-flow output signal to drive external module.The type that it will be understood by those skilled in the art that DC to DC converter shown in Figure 7 only is used for explanation, and the DC to DC converter of other type is equally available.Variable frequency multi-phase oscillator 720 can use the configuration of above having stated to realize, no longer repeats at this.
Figure 8 shows that mobile phone 800, its power subsystem has been equipped with variable frequency multi-phase oscillator.Mobile phone 800 mainly comprises transceiver 810, controller 820, user interface 830, memory cell 840 and power subsystem 850.Transceiver 810 can be by the contact of wireless telecommunications and base station, for example by antenna from wireless network receipts/pronunciation frequency and video data.By controller 820 controls, the data of wireless signal can be stored in the memory cell 840.User interface 830 control loudspeakers, microphone and display unit make the user can receive and send the Voice ﹠ Video data.Power subsystem 850 is responsible for to mobile phone 800 power supplies, and power subsystem 850 comprises a variable frequency multi-phase oscillator 860.Variable frequency multi-phase oscillator 860 can be realized with technology of above having stated and configuration.Variable frequency multi-phase oscillator 860 can generate required phase signal according to the requirement of mobile phone 800.Framework shown in Figure 8 equally also can be used for other wireless telecommunications system, such as the personal digital assistant (PDA) that is equipped with wireless communication assembly.
In the real work, variable frequency multi-phase oscillator 100 can receive analog signal and generate the DC to DC converter of polyphase signa (clock signal that phase place is relevant) with synchronous outside in a bigger frequency range.Adjust the duty ratio of polyphase signa and the frequency of oscillation of variable frequency multi-phase oscillator 100, the parameter of current/voltage that many key parameters such as analog signal provide and variable frequency multi-phase oscillator 100 inner essential assemblies is all very important.In other words, any change of above-mentioned parameter all may influence the function of variable frequency multi-phase oscillator 100.Variable frequency multi-phase oscillator 100 intrawares can comprise electric current-threshold value correlator 110, delay unit 120,122,124,126 and 128 and NOR circuit 130.
As alternative approach, variable frequency multi-phase oscillator 200 also can by control unit 210, a plurality of electric current-threshold value correlator 110,112,114,116 and 118, a plurality of delay unit 120,122,124,126 and 128 and NOR circuit 130 form.Therefore, above-mentioned a plurality of key parameters also can comprise control signal that control unit 210 generates according to analog signal and the above-mentioned electric current-threshold value correlator and the parameter of delay unit.
In the variable frequency multi-phase oscillator 100, electric current-threshold value correlator 110 can generate threshold voltage and be used for Synchronization Control delay unit 120,122,124,126 and 128.Like this, the duty ratio of polyphase signa equates.Yet each delay unit all is to control with the electric current that links to each other-threshold value correlator by one in a plurality of control signals in variable frequency multi-phase oscillator 200.Thereby the duty ratio of the phase signal that variable frequency multi-phase oscillator 200 generates when each control signal is different can be different.
Disclosed herein only for the present invention's embodiment commonly used, only be illustrative rather than definitive thereof at this.Those skilled in the art obviously are appreciated that under the prerequisite that does not substantially deviate from scope of the present invention that the appended claim book defined and invention spirit can numerous other embodiment.In addition, mention in the specification with claims in the key element of the present invention that requires may be odd number, its plural number belongs to scope of the present invention equally under the situation that is limited to odd number not spelling out.
Claims (29)
1. a variable frequency multi-phase oscillator that is used to generate polyphase signa is characterized in that, comprising:
A correlator is used for receiving from the outside control signal and generates a threshold voltage;
A plurality of delay units, delay unit is one another in series, and each delay unit all receives control signal, receives above-mentioned threshold voltage and generate a polyphase signa from correlator from the outside;
One or non-(NOR) circuit are used for receiving a plurality of polyphase signas and generating one from a plurality of delay units outputing signal to one of them delay unit.
2. the variable frequency multi-phase oscillator according to claim 1 is characterized in that, described correlator also comprises:
An electric current supply, this electric current supply provide a source current;
A current mirror, this current mirror receives above-mentioned source current and generates an image current from above-mentioned electric current supply;
A resistance that is connected to current mirror, this resistance receive reference voltage and above-mentioned image current and generate described threshold voltage.
3. the variable frequency multi-phase oscillator according to claim 1 is characterized in that, described each delay unit all comprises:
An electric current supply, this electric current supply provide a charging current;
An electric capacity that is connected to electric current supply;
A comparator that is connected to electric current supply and electric capacity, this comparator generates a digital signal;
A switch in parallel with electric capacity;
A logical block, this logical block has a first input end, second input, first output and one second output, first input end receives above-mentioned digital signal from electric capacity, second input is as the input work of delay unit, first output provides in a plurality of polyphase signas, and second output provides a control signal to switch.
4. the variable frequency multi-phase oscillator according to claim 3 is characterized in that, when the control signal of described logical block from second output disconnects described switch when low, charges to electric capacity from the charging current of electric current supply.
5. the variable frequency multi-phase oscillator according to claim 3 is characterized in that, when the control signal of described logical block from second output closed described switch when being high.
6. the variable frequency multi-phase oscillator according to claim 3 is characterized in that, described logical block is a rest-set flip-flop.
7. a variable frequency multi-phase oscillator that is used to generate polyphase signa is characterized in that, comprising:
A control unit is used for receiving from the outside input signal and generates a plurality of control signals;
A plurality of correlators are used for receiving a plurality of control signals and generating a plurality of threshold voltages from above-mentioned control unit;
A plurality of delay units that are one another in series, each delay unit are all in parallel with a correlator, are used for receiving of a plurality of control signals and receiving a plurality of threshold voltages one from control unit, and generate in a plurality of polyphase signas one;
A NOR circuit is used for from a plurality of delay units reception polyphase signas and generates one outputing signal to one of them delay unit.
8. the variable frequency multi-phase oscillator according to claim 7 is characterized in that, each correlator all comprises:
An electric current supply, this electric current supply provide a source current;
A current mirror, this current mirror receives above-mentioned source current and generates an image current from above-mentioned electric current supply;
A resistance that is connected to current mirror, this resistance receive reference voltage and above-mentioned image current and generate described threshold voltage.
9. the variable frequency multi-phase oscillator according to claim 7 is characterized in that, each delay unit all comprises:
An electric current supply, this electric current supply provide a charging current;
An electric capacity that is connected to electric current supply;
A comparator that is connected to electric current supply and electric capacity, this comparator generates a digital signal;
A switch in parallel with electric capacity;
A logical block, this logical block has a first input end, second input, first output and one second output, first input end receives above-mentioned digital signal from electric capacity, second input is as the input work of delay unit, first output provides in a plurality of polyphase signas, and second output provides a control signal to switch.
10. the variable frequency multi-phase oscillator according to claim 9 is characterized in that, when the control signal of described logical block from second output disconnects described switch when low, charges to electric capacity from the charging current of electric current supply.
11. the variable frequency multi-phase oscillator according to claim 9 is characterized in that, when the control signal of described logical block from second output closed described switch when being high.
12. the variable frequency multi-phase oscillator according to claim 9 is characterized in that, described logical block is a rest-set flip-flop.
13. a method that is used to generate polyphase signa is characterized in that, its step comprises:
(a) receive a current controling signal;
(b) in each delay unit, generate a threshold voltage according to current controling signal;
(c) in each delay unit, generate polyphase signa according to current controling signal and threshold voltage;
(d) computing polyphase signa in a NOR circuit;
(e) in the NOR circuit, generate a digital signal;
(f) if digital signal is high, repeat above (c) to (e) step.
14. the method according to claim 13 is characterized in that, described step (b) comprising:
Generate a source current according to current controling signal from the outside;
In current mirror, generate an image current according to source current;
Receive a reference voltage from external module;
Generate a threshold voltage according to reference voltage and image current.
15. the method according to claim 13 is characterized in that, described step (c) comprising:
In an electric capacity, generate a voltage signal;
This voltage signal is compared with described threshold voltage;
Result according to above-mentioned voltage signal and threshold voltage comparison generates a digital signal;
In a rest-set flip-flop, obtain above-mentioned digital signal and an input signal;
By one in above-mentioned digital signal and an input signal control switch controlling signal of generation and a plurality of polyphase signa.
16. the method according to claim 15 is characterized in that, the step of described formation voltage signal comprises:
Generate a charging current according to described current controling signal;
When switch controlling signal cut-off switch when low;
Charging current was to the voltage signal at electric capacity charging and renewal electric capacity two ends when switch disconnected;
When switch controlling signal Closing Switch when being high;
Capacitor discharge and upgrade the voltage signal at electric capacity two ends when switch closure.
17. the method according to claim 13 is characterized in that, described step (e) comprising:
Formation logic 0 when being high for one in a plurality of polyphase signas;
When all polyphase signas formation logic 1 when all being low.
18. an equipment is characterized in that, comprising:
A Power Management Unit (PMU), this PMU comprises:
A variable frequency multi-phase oscillator that is used to provide polyphase signa, this variable frequency multi-phase oscillator comprises:
A correlator is used for from control signal of outside reception;
A plurality of delay units, delay unit is one another in series, and each delay unit all receives control signal, receives above-mentioned threshold voltage and generate a polyphase signa from correlator from the outside;
A NOR circuit is used for receiving a plurality of polyphase signas and generating one from a plurality of delay units outputing signal to one of them delay unit.
A plurality of controllers, each controller all receive a polyphase signa;
A plurality of DC to DC converter, each DC to DC converter are all by a controller control.
19. the equipment according to claim 18 is characterized in that, described correlator also comprises:
An electric current supply, this electric current supply provide a source current;
A current mirror, this current mirror receives above-mentioned source current and generates an image current from above-mentioned electric current supply;
A resistance that is connected to current mirror, this resistance receive reference voltage and above-mentioned image current and generate described threshold voltage.
20. the equipment according to claim 18 is characterized in that, described each delay unit all comprises:
An electric current supply, this electric current supply provide a charging current;
An electric capacity that is connected to electric current supply;
A comparator that is connected to electric current supply and electric capacity, this comparator generates a digital signal;
A switch in parallel with electric capacity;
A logical block, this logical block has a first input end, second input, first output and one second output, first input end receives above-mentioned digital signal from electric capacity, second input is as the input work of delay unit, first output provides in a plurality of polyphase signas, and second output provides a control signal to switch.
21. the equipment according to claim 20 is characterized in that, when the control signal of described logical block from second output disconnects described switch when low, charges to electric capacity from the charging current of electric current supply.
22. the equipment according to claim 20 is characterized in that, when the control signal of described logical block from second output closed described switch when being high.
23. the equipment according to claim 20 is characterized in that, described logical block is a rest-set flip-flop.
24. one kind can is characterized in that by the wireless telecommunications system of wireless communication networks and base station contact, comprising:
A controller;
A transceiver is controlled by antenna and base station communication by above-mentioned controller;
A user interface can receive the Voice ﹠ Video data and the Voice ﹠ Video data are shown to the user from the user;
A memory cell can be stored above-mentioned Voice ﹠ Video data;
A power subsystem is used for to controller, transceiver, user interface and memory cell power supply, and this power subsystem comprises a variable frequency multi-phase oscillator, and this variable frequency multi-phase oscillator comprises:
A correlator is used for receiving from the outside control signal and generates a threshold voltage;
A plurality of delay units, delay unit is one another in series, and each delay unit all receives control signal, receives above-mentioned threshold voltage and generate a polyphase signa from correlator from the outside;
One or non-(NOR) circuit are used for receiving a plurality of polyphase signas and generating one from a plurality of delay units outputing signal to one of them delay unit.
25. the wireless telecommunications system according to claim 24 is characterized in that, described correlator comprises:
An electric current supply, this electric current supply provide a source current;
A current mirror, this current mirror receives above-mentioned source current and generates an image current from above-mentioned electric current supply;
A resistance that is connected to current mirror, this resistance receive reference voltage and above-mentioned image current and generate described threshold voltage.
26. the wireless telecommunications system according to claim 24 is characterized in that, described each delay unit all comprises:
An electric current supply, this electric current supply provide a charging current;
An electric capacity that is connected to electric current supply;
A comparator that is connected to electric current supply and electric capacity, this comparator generates a digital signal;
A switch in parallel with electric capacity;
A logical block, this logical block has a first input end, second input, first output and one second output, first input end receives above-mentioned digital signal from electric capacity, second input is as the input work of delay unit, first output provides in a plurality of polyphase signas, and second output provides a control signal to switch.
27. the wireless telecommunications system according to claim 26 is characterized in that, when the control signal of described logical block from second output disconnects described switch when low, charges to electric capacity from the charging current of electric current supply.
28. the wireless telecommunications system according to claim 26 is characterized in that, when the control signal of described logical block from second output closed described switch when being high.
29. the wireless telecommunications system according to claim 26 is characterized in that, described logical block is a rest-set flip-flop.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US81805506P | 2006-06-30 | 2006-06-30 | |
| US60/818,055 | 2006-06-30 | ||
| US11/583,281 | 2006-10-19 |
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| CN101102074A true CN101102074A (en) | 2008-01-09 |
| CN100553087C CN100553087C (en) | 2009-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007101227332A Expired - Fee Related CN100553087C (en) | 2006-06-30 | 2007-07-02 | Variable frequency multi-phase oscillator |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101931383A (en) * | 2009-06-19 | 2010-12-29 | 万国半导体股份有限公司 | Flexible low current oscillator for multiphase operations |
| CN102160291A (en) * | 2008-09-16 | 2011-08-17 | 株式会社理光 | Oscillating circuit, DC-DC converter, and semiconductor device |
| CN102449912A (en) * | 2009-05-29 | 2012-05-09 | 松下电器产业株式会社 | Phase lock loop with a multiphase oscillator |
| CN102684491A (en) * | 2011-05-10 | 2012-09-19 | 成都芯源系统有限公司 | Switching regulator and control circuit and control method thereof |
| CN104579258A (en) * | 2013-10-10 | 2015-04-29 | 成都国腾电子技术股份有限公司 | A range adjustable, and step length adjustable delay adjustment circuit |
| CN107844615A (en) * | 2016-09-20 | 2018-03-27 | 中芯国际集成电路制造(上海)有限公司 | For realizing the method and delay circuit of controllable time delay |
| CN111614166A (en) * | 2020-06-10 | 2020-09-01 | 中国科学院近代物理研究所 | Excitation power supply control system and method based on SFP + multi-module accelerator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102160291A (en) * | 2008-09-16 | 2011-08-17 | 株式会社理光 | Oscillating circuit, DC-DC converter, and semiconductor device |
| CN102449912A (en) * | 2009-05-29 | 2012-05-09 | 松下电器产业株式会社 | Phase lock loop with a multiphase oscillator |
| CN102449912B (en) * | 2009-05-29 | 2014-07-16 | 松下电器产业株式会社 | Phase lock loop with a multiphase oscillator |
| CN101931383A (en) * | 2009-06-19 | 2010-12-29 | 万国半导体股份有限公司 | Flexible low current oscillator for multiphase operations |
| CN101931383B (en) * | 2009-06-19 | 2013-04-03 | 万国半导体股份有限公司 | Flexible low current oscillator for multiphase operations |
| CN102684491A (en) * | 2011-05-10 | 2012-09-19 | 成都芯源系统有限公司 | Switching regulator and control circuit and control method thereof |
| CN104579258A (en) * | 2013-10-10 | 2015-04-29 | 成都国腾电子技术股份有限公司 | A range adjustable, and step length adjustable delay adjustment circuit |
| CN104579258B (en) * | 2013-10-10 | 2017-07-04 | 成都振芯科技股份有限公司 | A kind of scope is adjustable, the adjustable delay regulating circuit of step-length |
| CN107844615A (en) * | 2016-09-20 | 2018-03-27 | 中芯国际集成电路制造(上海)有限公司 | For realizing the method and delay circuit of controllable time delay |
| CN112421953A (en) * | 2019-08-22 | 2021-02-26 | 圣邦微电子（北京）股份有限公司 | Multiphase converter and control circuit and control method thereof |
| CN112421953B (en) * | 2019-08-22 | 2022-02-15 | 圣邦微电子（北京）股份有限公司 | Multiphase converter and control circuit and control method thereof |
| CN111614166A (en) * | 2020-06-10 | 2020-09-01 | 中国科学院近代物理研究所 | Excitation power supply control system and method based on SFP + multi-module accelerator |
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