CN101557217A - Multi-dimensional pulse width modulation method and multi-dimensional pulse width modulation signal generating device thereof - Google Patents
Multi-dimensional pulse width modulation method and multi-dimensional pulse width modulation signal generating device thereof Download PDFInfo
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Abstract
The invention relates to a multi-dimensional pulse width modulation method and a multi-dimensional pulse width modulation signal generating device thereof. The multi-dimensional pulse width modulation method can be used for sampling an input signal to generate a pulse width modulation signal comprising at least one modulation pulse. The energy contained in the PWM signal is expressed according to a data bit combination, and the data bit combination uses at least three of the PWM control bit, the current control bit, the voltage control bit and the repetition rate control bit to adjust the energy contained in the PWM signal. The multi-dimensional pulse width modulation signal generating device comprises a pulse code modulator, a multi-dimensional pulse width modulation controller and a multi-dimensional pulse width modulation driver. The multidimensional pulse width modulation method can increase the resolution of the pulse width modulation signal; the multi-dimensional PWM signal generator can improve the defect of insufficient resolution of the current PWM signal, and is very practical.
Description
Technical field
The present invention relates to a kind of pulse-width modulating method and pulse-width modulating signal generator thereof, particularly relate to a kind of consider more than three become because of multi-dimensional pulse-width modulating method and multi-dimensional pulse-width modulating signal generation device (Multi-Dimension Pulse Width ModulationMethod and Multi-Dimension Pulse Width Modulation Signal GeneratingApparatus) thereof.
Background technology
(Pulse Width Modulation PWM) utilizes the different work periods to represent various signals (signal is a signal, and this paper all is called signal) to pulse width modulation.Seeing also shown in Figure 1ly, is the oscillogram of the existing employed a kind of pulse width modulation of known techniques (PWM) signal.In this kind technology, the waveform of pulse width modulation (PWM) signal is made up of the different square wave of width, and what the square wave of broad was represented is higher energy, and narrower square wave is then represented less energy.By using this type of pulse width modulation (PWM) signal to promote loudspeaker, just can produce the voice output of analogy from loudspeaker.This type of drive is adopted by many voice outputs.
Owing to be subjected to the restriction of operating frequency,, and can't give expression to the content of signal originally very accurately between sample frequency and resolution so general pulse width modulation (PWM) signal must average out.This situation can cause the anaiog signal of output to produce distortion.For addressing this problem, many people propose the various modes that increase resolution or sample frequency under same operating frequency.For instance, No. the 453045th, TaiWan, China, name is called the patent of " changing device of multi-standard-bit pulse width and control structure thereof ", has just proposed a kind ofly keeping the technology that is improved resolution under the prerequisite of sampling rate.
In addition, seeing also shown in Figure 2ly, is the oscillogram of another kind of pulse width modulation (PWM) signal that adopted of existing known techniques.In this technology, except width, also merge the size used each side's wave amplitude in pulse width modulation (PWM) signal to represent the energy of its representative.
Yet, because pulse width modulation (PWM) waveform itself only includes work period (dutycycle) and these two adjustable compositions of amplitude, therefore in general technology commonly used, generally all only use the duty cycle variation of pulse width modulation (PWM) waveform to consider as the unique of resolution; Even in No. 453045 patents of aforementioned TaiWan, China or further improving technology shown in Figure 2, also only be that the factor that has increased an electric current is considered as second of resolution.And the restriction of this resolution lifting degree that has limited pulse width modulation (PWM) signal accuracy similarly undoubtedly.
This shows that pulse width modulation (PWM) signal that technology generated that above-mentioned prior art is used still has its defective to exist, in modulating method, product structure and use, obviously still have inconvenience and defective, and demand urgently further being improved.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and conventional method and product do not have appropriate method and structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves, and has also just become a current important problem and how to improve these signals.Therefore how to found a kind of new multi-dimensional pulse-width modulating method and multi-dimensional pulse-width modulating signal generation device thereof, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Because above-mentioned existing pulse-width modulating method and the existing defective of signal generation device thereof, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge thereof, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of new multi-dimensional pulse-width modulating method and multi-dimensional pulse-width modulating signal generation device thereof, can improve general existing pulse-width modulating method and signal generation device thereof, make it have more practicality.Through constantly research, design, and after studying repeatedly and improving, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the defective that existing pulse-width modulating method exists, and a kind of new multi-dimensional pulse-width modulating method, technical problem to be solved are provided is to make its resolution that can increase the pulse width modulation signal, is very suitable for practicality.
Another object of the present invention is to, overcome the defective that existing pulse-width modulating signal generator exists, and provide a kind of multi-dimensional pulse-width modulating signal generation device of new structure, technical problem to be solved is to make its awkward situation that can improve present pulse width modulation signal resolution degree deficiency effectively, thereby is suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of multi-dimensional pulse-width modulating method according to the present invention's proposition, be to be used for an input signal is taken a sample to produce a corresponding pulse width modulation signal, this pulse width modulation signal comprises at least one modulation pulse, this multi-dimensional pulse-width modulating method may further comprise the steps: (data is data according to a data, information, below all being called data) bit combination shows the energy that this pulse width modulation signal is comprised, this data bit is used in combination following four kinds of control threes at least in the bits: at least one pulse width modulation control bit changes according to the amplitude of this input signal; At least one Current Control bit, expression be used for adjusting this modulation pulse energy one adjust electric current; At least one voltage control bit, expression be used for adjusting this modulation pulse energy one adjust voltage; And at least one repetition rate control bit, represent the number of times that this modulation pulse repeats, to adjust the energy of this pulse width modulation signal by this.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid multi-dimensional pulse-width modulating method, it more comprises the following steps: to use at least one ripple control bit of trembling in this data bit combination, to control the time point that this modulation pulse repeats.
Aforesaid multi-dimensional pulse-width modulating method, it more comprises the following steps: to use at least one FREQUENCY CONTROL bit in this data bit combination, to control the frequency of this modulation pulse.
Aforesaid multi-dimensional pulse-width modulating method, it more comprises the following steps: to control the current strength of this adjustment electric current according to this Current Control bit but not controls work period of this adjustment electric current.
Aforesaid multi-dimensional pulse-width modulating method, the work period of wherein said adjustment electric current is fixed.
Aforesaid multi-dimensional pulse-width modulating method, it more comprises the following steps: to control the voltage swing of this adjustment voltage according to this voltage control bit, but not controls the work period of this adjustment voltage.
Aforesaid multi-dimensional pulse-width modulating method, the work period of wherein said adjustment voltage is fixed.
The object of the invention to solve the technical problems also realizes by the following technical solutions.A kind of multi-dimensional pulse-width modulating signal generation device according to the present invention's proposition, this multi-dimensional pulse-width modulating signal generation device is taken a sample an input signal to produce a corresponding pulse width modulation signal, this multi-dimensional pulse-width modulating signal generation device comprises: a pulse code modulator, and this input signal of taking a sample is to produce a pulse code result; One multi-dimensional pulse-width modulating controller, be electrically coupled to this pulse code modulator to receive this pulse code result, this multi-dimensional pulse-width modulating controller comprises the three at least in following four kinds of signal controllers: a pulse width modulation signal controller produces a corresponding pulse width modulation control signal according to this pulse code result when being enabled; One current signal controller produces a corresponding current controling signal according to this pulse code result when being enabled; One voltage signal controller produces a corresponding voltage control signal according to this pulse code result when being enabled; And a repetition rate signal controller, when being enabled, produce a corresponding repetition rate control signal according to this pulse code result; An and multi-dimensional pulse-width modulating driver, be to be electrically coupled to this multi-dimensional pulse-width modulating controller, this multi-dimensional pulse-width modulating driver comprises in a processor and the following four kinds of signal generators person of being set up corresponding to aforementioned each signal controller: a pulse width modulation signal generator, be set up corresponding to this pulse width modulation signal controller, receive this pulse width modulation control signal to produce corresponding one first signal; One current signal generator is set up corresponding to this current signal controller, receives this current controling signal to produce a corresponding secondary signal; One voltage signal generator is set up corresponding to this voltage signal controller, receives this voltage control signal to produce corresponding one the 3rd signal; And a repetition rate signal generator, be set up corresponding to this repetition rate signal controller, receive this repetition rate control signal to produce corresponding one the 4th signal; Wherein, the signal that the various signal generators that this processor is comprised according to this multi-dimensional pulse-width modulating driver produce produces this pulse width modulation signal.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid multi-dimensional pulse-width modulating signal generation device, wherein said multi-dimensional pulse-width modulating controller more comprises: one trembles the ripple signal controller, produces corresponding one according to this pulse code result and tremble wave control signal when being enabled; And this multi-dimensional pulse-width modulating driver more comprises: one trembles the ripple signal generator, receives this and trembles wave control signal to produce corresponding one the 5th signal.
Aforesaid multi-dimensional pulse-width modulating signal generation device, it more comprises a master controller, and this master controller is electrically coupled to this multi-dimensional pulse-width modulating controller and trembles the ripple signal controller whether to determine this pulse width modulation signal controller of activation, this current signal controller, this voltage signal controller, this repetition rate signal controller and this.
Aforesaid multi-dimensional pulse-width modulating signal generation device, wherein said multi-dimensional pulse-width modulating controller more comprises: a frequency signal controller produces a corresponding frequency control signal according to this pulse code result when being enabled; And this multi-dimensional pulse-width modulating driver more comprises: a frequency signal generator receives this frequency control signal to produce corresponding one the 5th signal.
Aforesaid multi-dimensional pulse-width modulating signal generation device, it more comprises a master controller, and this master controller is electrically coupled to this multi-dimensional pulse-width modulating controller whether to determine this pulse width modulation signal controller of activation, this current signal controller, this voltage signal controller, this repetition rate signal controller and this frequency signal controller.
Aforesaid multi-dimensional pulse-width modulating signal generation device, it more comprises a master controller, and this master controller is electrically coupled to this multi-dimensional pulse-width modulating controller whether to determine this pulse width modulation signal controller of activation, this current signal controller, this voltage signal controller and this repetition rate signal controller.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, major technique of the present invention thes contents are as follows:
For achieving the above object, a kind of multi-dimensional pulse-width modulating method has been proposed in one embodiment of the invention, it can be used to input signal taken a sample and comprises the pulse width modulation signal of at least one modulation pulse with generation.This multi-dimensional pulse-width modulating method is to make up according to a data bit to show the energy that the pulse width modulation signal is comprised.This data bit is used in combination following four kinds of control threes at least in the bits: at least one pulse width modulation control bit changes according to the amplitude of input signal; At least one Current Control bit, expression is used for adjusting the adjustment electric current of the energy of aforementioned modulation pulse; At least one voltage control bit, expression is used for adjusting the adjustment voltage of the energy of aforementioned modulation pulse; And at least one repetition rate control bit, represent the number of times that aforementioned modulation pulse repeats.
In addition, for achieving the above object, a kind of multi-dimensional pulse-width modulating signal generation device has been proposed in addition then in another embodiment of the present invention.This multi-dimensional pulse-width modulating signal generation device is taken a sample to produce corresponding pulse width modulation signal to input signal.It comprises pulse code modulator, multi-dimensional pulse-width modulating controller and multi-dimensional pulse-width modulating driver.The pulse code modulator is taken a sample aforementioned input signal to produce a pulse code result.The multi-dimensional pulse-width modulating controller is electrically coupled to the pulse code modulator with the received pulse coding result, and it comprises pulse width modulation signal controller, current signal controller, voltage signal controller and the repetition rate signal controller three at least in this.Wherein, the pulse width modulation signal controller produces corresponding pulse width modulation control signal according to the pulse code result when being enabled; The current signal controller produces corresponding current controling signal according to the pulse code result when being enabled; The voltage signal controller produces corresponding voltage control signal according to the pulse code result when being enabled; The repetition rate signal controller then produces corresponding repetition rate control signal according to the pulse code result when being enabled.The multi-dimensional pulse-width modulating driver electrically is coupled to aforesaid multi-dimensional pulse-width modulating controller, and it comprises the three at least in processor and pulse width modulation signal generator, current signal generator, voltage signal generator and the repetition rate signal generator.Pulse width modulation signal generator received pulse width modulation control signal is to produce corresponding first signal; Current signal generator received current control signal is to produce corresponding secondary signal; The voltage signal generator receives voltage control signal to produce corresponding the 3rd signal; The repetition rate signal generator receives the repetition rate control signal to produce corresponding the 4th signal; The signal that the various signal generators that processor is then comprised according to the multi-dimensional pulse-width modulating driver produce produces aforesaid pulse width modulation signal.
In one embodiment of the invention, aforesaid multi-dimensional pulse-width modulating signal generation device more comprises a master controller.This master controller is electrically coupled to the multi-dimensional pulse-width modulating controller whether to determine activation pulse width modulation signal controller, current signal controller, voltage signal controller and repetition rate signal controller.
By technique scheme, multi-dimensional pulse-width modulating method of the present invention and multi-dimensional pulse-width modulating signal generation device thereof have following advantage and beneficial effect at least: the present invention is because consider more (that is three and more than) adjustment factor, with the pulse width modulation signal that determines to obtain at last, therefore can improve resolution, further increase the levels of precision of output energy.
In sum, the invention relates to a kind of multi-dimensional pulse-width modulating method and multi-dimensional pulse-width modulating signal generation device thereof.This multi-dimensional pulse-width modulating method, can be used to input signal taken a sample comprises the pulse width modulation signal of at least one modulation pulse with generation.It makes up according to a data bit and shows the energy that the pulse width modulation signal is comprised, and this data bit combination then uses the three at least in pulse width modulation control bit, Current Control bit, voltage control bit and the repetition rate control bit to adjust the energy that the pulse width modulation signal is comprised.Multi-dimensional pulse-width modulating method of the present invention can increase the resolution of pulse width modulation signal.Multi-dimensional pulse-width modulating signal generation device of the present invention can improve the awkward situation of present pulse width modulation signal resolution degree deficiency effectively, is very suitable for practicality.The present invention has above-mentioned plurality of advantages and practical value, no matter it all has bigger improvement on modulating method, product structure or function, obvious improvement is arranged technically, and produced handy and practical effect, and more existing pulse-width modulating method and signal generation device thereof have the outstanding effect of enhancement, thereby being suitable for practicality more, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the oscillogram of the existing employed a kind of pulse width modulation of known techniques (PWM) signal.
Fig. 2 is the oscillogram of another kind of pulse width modulation (PWM) signal that adopted of existing known techniques.
Fig. 3 is the circuit block diagram according to the multi-dimensional pulse-width modulating signal generation device of a preferred embodiment of the present invention.
Fig. 4 is the circuit block diagram according to the multi-dimensional pulse-width modulating driver of a preferred embodiment of the present invention.
Fig. 5 is the flow chart according to a kind of multi-dimensional pulse-width modulating method of a preferred embodiment of the present invention.
Fig. 6 A～Fig. 6 C is the schematic diagram that demonstrates according to the waveform generation mode of the multi-dimensional pulse-width modulating of a preferred embodiment of the present invention.
Fig. 7 is the circuit block diagram of the multi-dimensional pulse-width modulating signal generation device of another preferred embodiment according to the present invention.
Fig. 8 is the circuit block diagram of the multi-dimensional pulse-width modulating driver of another preferred embodiment according to the present invention.
30: multi-dimensional pulse-width modulating signal generation device 32: the pulse code modulator
34: multi-dimensional pulse-width modulating controller 341: the pulse width modulation signal controller
343: current signal controller 345: the voltage signal controller
347: repetition rate signal controller 348: tremble the ripple signal controller
349: frequency signal controller 36: the multi-dimensional pulse-width modulating driver
361: pulse width modulation signal generator 363: the current signal generator
364: processor 365: the voltage signal generator
367: repetition rate signal generator 368: tremble the ripple signal generator
369: frequency signal generator 38: master controller
P: the wave period 40 of pulse width modulation signal: loud speaker
The administration step of S510～S550 this case one embodiment
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to multi-dimensional pulse-width modulating method and its embodiment of multi-dimensional pulse-width modulating signal generation device, method, step, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Relevant aforementioned and other technology contents, characteristics and effect of the present invention can be known to present in the following detailed description that cooperates with reference to graphic preferred embodiment.By the explanation of embodiment, when can being to reach technological means that predetermined purpose takes and effect to get one more deeply and concrete understanding to the present invention, yet appended graphic only provide with reference to the usefulness of explanation, be not to be used for the present invention is limited.
Seeing also shown in Figure 3ly, is the circuit block diagram according to the multi-dimensional pulse-width modulating signal generation device 30 of a preferred embodiment of the present invention.In this preferred embodiment, this multi-dimensional pulse-width modulating signal generation device 30 is in order to an input signal, and for example audio data is taken a sample to produce corresponding pulse width modulation signal and to export an output device to, and for example loud speaker 40.This multi-dimensional pulse-width modulating signal generation device 30, comprise pulse code modulator (Pulse Code ModulationGenerator, PCM Generator) 32, multi-dimensional pulse-width modulating controller 34, multi-dimensional pulse-width modulating driver 36 and master controller 38; Wherein:
Above-mentioned pulse code modulator 32, the aforementioned input signal of taking a sample is to produce the pulse code result;
Above-mentioned multi-dimensional pulse-width modulating controller 34 is electrically coupled to pulse code modulator 32 with the received pulse coding result.This multi-dimensional pulse-width modulating controller 34 comprises pulse width modulation signal controller 341, current signal controller 343, voltage signal controller 345 and repetition rate signal controller 347.
Above-mentioned multi-dimensional pulse-width modulating driver 36 is electrically coupled to multi-dimensional pulse-width modulating controller 34;
Above-mentioned master controller 38, be electrically coupled to multi-dimensional pulse-width modulating controller 34 and multi-dimensional pulse-width modulating driver 36 to be responsible for the action of multi-dimensional pulse-width modulating controller 34 and multi-dimensional pulse-width modulating driver 36, that is represent the modulation dimension of multi-dimensional pulse-width modulating controller 34 to change, the pattern of multi-dimensional pulse-width modulating driver 36 also can change.
Seeing also shown in Figure 4ly, is the circuit block diagram according to the multi-dimensional pulse-width modulating driver of a preferred embodiment of the present invention.Above-mentioned multi-dimensional pulse-width modulating driver 36 comprises processor 364 and corresponding to aforementioned each signal controller 341,343,345 and 347 and the pulse width modulation signal generator 361, current signal generator 363, voltage signal generator 365 and the repetition rate signal generator 367 that are set up.
Be understandable that, aforesaid multi-dimensional pulse-width modulating controller 34, comprise the three at least in pulse width modulation signal controller 341, current signal controller 343, voltage signal controller 345 and the repetition rate signal controller 347, can realize multi-dimensional pulse-width modulating and reach purpose of the present invention; Multi-dimensional pulse-width modulating driver 36 also can comprise correspondingly that the three at least in pulse width modulation signal generator 361, current signal generator 363, voltage signal generator 365 and the repetition rate signal generator 367 gets final product.
Seeing also shown in Figure 5ly, is the flow chart according to a kind of multi-dimensional pulse-width modulating method of a preferred embodiment of the present invention.The multi-dimensional pulse-width modulating method of preferred embodiment of the present invention mainly may further comprise the steps:
After multi-dimensional pulse-width modulating method begins, execution in step S510 at first, master controller 38 is set, for example set the state of each signal controller 341,343,345 in the multi-dimensional pulse- width modulating controller 34 and 347, so that the three at least in signal controller 341,343,345 and 347 is enabled, to realize the purpose of multi-dimensional pulse-width modulating.
Then, execution in step S520 takes a sample input signals (for example audio data) to produce the pulse code result by pulse code modulator 32.
Whether then, step S530 is performed, be enabled to judge each signal controller 341,343,345 and 347 in the multi-dimensional pulse-width modulating controller 34.When pulse width modulation signal controller 341 is enabled, then execution in step S541 produces corresponding pulse width modulation control signal by pulse width modulation signal controller 341 according to the pulse code result;
When current signal controller 343 is enabled, then execution in step S543 produces corresponding current controling signal by current signal controller 343 according to the pulse code result;
When voltage signal controller 345 is enabled, then execution in step S545 produces corresponding voltage control signal by voltage signal controller 345 according to the pulse code result;
When repetition rate signal controller 347 is enabled, then execution in step S547 produces corresponding repetition rate control signal by repetition rate signal controller 347 according to the pulse code result.
The control signal that each signal controller that is enabled produces exports multi-dimensional pulse-width modulating driver 36 to, by multi-dimensional pulse-width modulating driver 36 execution in step S550, to produce corresponding pulse width modulation signal as output.
So far, the flow process of the multi-dimensional pulse-width modulating method of preferred embodiment of the present invention finishes.
Wherein, the execution for step S550 specifically can be: when pulse width modulation controller 341 is enabled, receive aforementioned pulse width modulation control signal to produce corresponding first signal by pulse width modulation signal generator 361; When current signal controller 343 is enabled, receive the aforementioned currents control signal to produce corresponding secondary signal by current signal generator 363; When voltage signal controller 345 is enabled, receive the aforesaid voltage control signal to produce corresponding the 3rd signal by voltage signal generator 365; When repetition rate signal controller 347 is enabled, receive aforementioned repetition rate control signal to produce corresponding the 4th signal by repetition rate signal generator 367; 364 each signal generator 341,343,345 and 347 each signals that produces that comprised according to multi-dimensional pulse-width modulating driver 36 of processor produce aforesaid pulse width modulation signal as output.
Seeing also shown in Fig. 6 A～Fig. 6 C, is the schematic diagram that demonstrates according to the waveform generation mode of the multi-dimensional pulse-width modulating of a preferred embodiment of the present invention, demonstrates the waveform generation mode according to the multi-dimensional pulse-width modulating of a preferred embodiment of the present invention.In this preferred embodiment, each signal controller 341,343,345 and 347 of this multi-dimensional pulse-width modulating controller 34 is all by master controller 38 activations, that is integrated four-dimensional modulations such as pulse width modulation, current modulating, voltage modulation and repetition pulse modulation; Shown in Fig. 6 A～Fig. 6 C, multi-dimensional pulse-width modulating method is to make up according to data bit to show the energy that aforementioned pulse width modulation signal is comprised, to reach the purpose of multi-dimensional pulse-width modulating.This data bit combination can comprise at least one pulse width modulation control bit of the pulse width modulation control signal that corresponding aforementioned pulse width modulation controller 341 produces, at least one Current Control bit of the current controling signal that corresponding aforementioned currents signal controller 343 produces, at least one voltage control bit of the voltage control signal that corresponding aforesaid voltage signal controller 345 produces, and at least one repetition rate control bit of the repetition rate control signal of corresponding aforementioned repetition rate signal controller 347 generations.This data bit is used in combination the three at least in the various control bits, can realize the purpose of multi-dimensional pulse-width modulating, and then improves resolution to increase the levels of precision of output energy.
Wherein, pulse width modulation control bit unit changes according to the amplitude of aforementioned input signal.The Current Control bit represent to be used for to adjust aforementioned pulse width modulation signal the modulation pulse energy one adjust electric current, this adjusts the current strength or the work period of electric current this Current Control bit may command; This work period of adjusting electric current can be fixed, thereby the control of Current Control bit is adjusted the current strength of electric current but not controlled the work period of adjusting electric current.The voltage control bit represent to be used for to adjust this modulation pulse energy one adjust voltage, this voltage control bit may command is adjusted the voltage swing or the work period of voltage; This work period of adjusting voltage can be fixed, the work period of control adjustment voltage thereby the voltage control bit is controlled this voltage swing of adjusting voltage.Repetition rate control bit is represented the number of times that this modulation pulse repeats, to adjust the energy of aforementioned pulse width modulation signal by this.
Concrete, be example with Fig. 6 A～Fig. 6 C, the bit number of Current Control bit, voltage control bit and repetition rate control bit is preset as two, and the bit number of pulse width modulation control bit is preset as ten; And the variation of four kinds of electric currents and four kinds of voltages merged, totally eight kinds of variations, that is the bit number of " electric current+Current Control bit " shown in Fig. 6 A～Fig. 6 C is three.Have more one times variable quantity compared with four kinds of variations of independent electric current, simultaneously adopting interlace mode on state variation (is that least significant bit (LSB) amplitude of variation is little, highest significant position (MSB) vary within wide limits), the energy changing of predetermined current is little and energy changing voltage is big.Repetition rate control bit is controlled bit as energy, by the repeatability of utilizing on the time-domain, controls the size of output energy.
12 kinds of examples respectively controlling bit in the aforesaid data bit combination have been shown among Fig. 6 A～Fig. 6 C, every kind of example at the data bit combination, pulse width modulation signal generator 361 in the multi-dimensional pulse-width modulating driver 36, current signal generator 363, voltage signal generator 365 and repetition rate signal generator 367, accept pulse width modulation control bit respectively, Current Control bit and voltage control bit are (in the present embodiment, Current Control bit and voltage control bit are merged into " electric current+Current Control bit "), and the control of repetition rate control bit, and produce first signal of carrying out pulse width modulation respectively accordingly, carry out the secondary signal of current modulating, carry out the 3rd signal of voltage modulation and the 4th signal of carrying out the repetition pulse modulation; Afterwards, handle, to produce aforesaid pulse width modulation signal as output by 364 pairs first, second, third of processors and the 4th signal.
In addition, from Fig. 6 A～Fig. 6 C, can learn, the value of repetition rate control bit is that " 00 ", " 01 ", " 10 " reach the situation that " 01 " corresponding respectively aforementioned pulse width modulation signal comprises one, two, three and four modulation pulse, can adjust the energy of this pulse width modulation signal by this; Wherein " P " is the wave period (Waveform Period) of pulse width modulation signal.
See also Fig. 7 and shown in Figure 8, Fig. 7 is the circuit block diagram of the multi-dimensional pulse-width modulating signal generation device of another preferred embodiment according to the present invention, and Fig. 8 is the circuit block diagram of the multi-dimensional pulse-width modulating driver of another preferred embodiment according to the present invention.The multi-dimensional pulse-width modulating controller 30 of above-mentioned preferred embodiment, can comprise further and tremble a ripple signal controller 348 and a frequency signal controller 349 that the control that is electrically coupled to pulse code modulator 32 and accepts master controller 38 is to be enabled (Enable) or by (Disable); Accordingly, multi-dimensional pulse-width modulating driver 36 can comprise further respectively corresponding tremble ripple signal controller 348 and frequency signal controller 349 and be provided with one tremble a ripple signal generator 368 and a frequency signal generator 369.
Wherein, this is trembled ripple signal controller 348 and becomes pulse code result that sign indicating number modulator 32 produces according to pulse produce corresponding one and tremble wave control signal by master controller 38 activations the time, thereby can further comprise at least one time point that ripple control bit (with to tremble wave control signal corresponding) repeats with the modulation pulse of controlling aforementioned pulse width modulation signal of trembling in the combination of aforesaid data bit; Tremble ripple signal generator 368 then reception tremble wave control signal to produce corresponding one the 5th signal.Frequency signal controller 349 becomes the pulse code result that sign indicating number modulator 32 produces according to pulse and produces a corresponding frequency control signal by master controller 38 activations the time, thereby can further comprise the frequency of at least one FREQUENCY CONTROL bit (corresponding with frequency control signal) with the modulation pulse of controlling aforementioned pulse width modulation signal in the combination of aforesaid data bit; Frequency signal generator 369 then the receive frequency control signal to produce corresponding one the 6th signal.Wherein, the bit number of trembling ripple control bit and FREQUENCY CONTROL bit can be preset according to actual needs.In addition, be understandable that, aforesaidly tremble ripple signal controller 348 and a frequency signal controller 349 also can be selected a setting according to the demand of practical application.
In sum, multi-dimensional pulse-width modulating method that preferred embodiment of the present invention provides and multi-dimensional pulse-width modulating signal generation device thereof, because be the pulse width modulation signal of adjustment factor of considering more (three and more than) to determine to obtain at last, therefore can improve resolution, increase the levels of precision of output energy further, be very suitable for practicality.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solution of the present invention content, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (13)
1, a kind of multi-dimensional pulse-width modulating method, be to be used for an input signal is taken a sample to produce a corresponding pulse width modulation signal, this pulse width modulation signal comprises at least one modulation pulse, it is characterized in that this multi-dimensional pulse-width modulating method may further comprise the steps:
Make up according to a data bit and to show the energy that this pulse width modulation signal is comprised, this data bit is used in combination the threes at least in following four kinds of control bits:
At least one pulse width modulation control bit changes according to the amplitude of this input signal;
At least one Current Control bit, expression be used for adjusting this modulation pulse energy one adjust electric current;
At least one voltage control bit, expression be used for adjusting this modulation pulse energy one adjust voltage; And
At least one repetition rate control bit is represented the number of times that this modulation pulse repeats, to adjust the energy of this pulse width modulation signal by this.
2, multi-dimensional pulse-width modulating method according to claim 1 is characterized in that it more comprises the following steps: to use at least one ripple control bit of trembling in this data bit combination, to control the time point that this modulation pulse repeats.
3, multi-dimensional pulse-width modulating method according to claim 1 is characterized in that it more comprises the following steps: to use at least one FREQUENCY CONTROL bit in this data bit combination, to control the frequency of this modulation pulse.
4, multi-dimensional pulse-width modulating method according to claim 1 is characterized in that it more comprises the following steps: to control the current strength of this adjustment electric current according to this Current Control bit but not controls work period of this adjustment electric current.
5, multi-dimensional pulse-width modulating method according to claim 4 is characterized in that the work period of wherein said adjustment electric current is fixed.
6, multi-dimensional pulse-width modulating method according to claim 1 is characterized in that it more comprises the following steps: to control the voltage swing of this adjustment voltage according to this voltage control bit, but not controls the work period of this adjustment voltage.
7, multi-dimensional pulse-width modulating method according to claim 6 is characterized in that the work period of wherein said adjustment voltage is fixed.
8, a kind of multi-dimensional pulse-width modulating signal generation device, this multi-dimensional pulse-width modulating signal generation device are taken a sample an input signal to produce a corresponding pulse width modulation signal, it is characterized in that this multi-dimensional pulse-width modulating signal generation device comprises:
One pulse code modulator, this input signal of taking a sample is to produce a pulse code result;
One multi-dimensional pulse-width modulating controller is electrically coupled to this pulse code modulator to receive this pulse code result, and this multi-dimensional pulse-width modulating controller comprises the three at least in following four kinds of signal controllers:
One pulse width modulation signal controller produces a corresponding pulse width modulation control signal according to this pulse code result when being enabled;
One current signal controller produces a corresponding current controling signal according to this pulse code result when being enabled;
One voltage signal controller produces a corresponding voltage control signal according to this pulse code result when being enabled; And
One repetition rate signal controller produces a corresponding repetition rate control signal according to this pulse code result when being enabled; And
One multi-dimensional pulse-width modulating driver is to be electrically coupled to this multi-dimensional pulse-width modulating controller, and this multi-dimensional pulse-width modulating driver comprises in a processor and the following four kinds of signal generators person of being set up corresponding to aforementioned each signal controller:
One pulse width modulation signal generator is set up corresponding to this pulse width modulation signal controller, receives this pulse width modulation control signal to produce corresponding one first signal;
One current signal generator is set up corresponding to this current signal controller, receives this current controling signal to produce a corresponding secondary signal;
One voltage signal generator is set up corresponding to this voltage signal controller, receives this voltage control signal to produce corresponding one the 3rd signal; And
One repetition rate signal generator is set up corresponding to this repetition rate signal controller, receives this repetition rate control signal to produce corresponding one the 4th signal;
Wherein, the signal that the various signal generators that this processor is comprised according to this multi-dimensional pulse-width modulating driver produce produces this pulse width modulation signal.
9, multi-dimensional pulse-width modulating signal generation device according to claim 8 is characterized in that wherein said multi-dimensional pulse-width modulating controller more comprises:
One trembles the ripple signal controller, produces corresponding one according to this pulse code result and tremble wave control signal when being enabled; And
This multi-dimensional pulse-width modulating driver more comprises:
One trembles the ripple signal generator, receives this and trembles wave control signal to produce corresponding one the 5th signal.
10, multi-dimensional pulse-width modulating signal generation device according to claim 9, it is characterized in that it more comprises a master controller, this master controller is electrically coupled to this multi-dimensional pulse-width modulating controller and trembles the ripple signal controller whether to determine this pulse width modulation signal controller of activation, this current signal controller, this voltage signal controller, this repetition rate signal controller and this.
11, multi-dimensional pulse-width modulating signal generation device according to claim 8 is characterized in that wherein said multi-dimensional pulse-width modulating controller more comprises:
One frequency signal controller produces a corresponding frequency control signal according to this pulse code result when being enabled; And
This multi-dimensional pulse-width modulating driver more comprises:
One frequency signal generator receives this frequency control signal to produce corresponding one the 5th signal.
12, multi-dimensional pulse-width modulating signal generation device according to claim 11, it is characterized in that it more comprises a master controller, this master controller is electrically coupled to this multi-dimensional pulse-width modulating controller whether to determine this pulse width modulation signal controller of activation, this current signal controller, this voltage signal controller, this repetition rate signal controller and this frequency signal controller.
13, multi-dimensional pulse-width modulating signal generation device according to claim 8, it is characterized in that it more comprises a master controller, this master controller is electrically coupled to this multi-dimensional pulse-width modulating controller whether to determine this pulse width modulation signal controller of activation, this current signal controller, this voltage signal controller and this repetition rate signal controller.
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| CNA2008100892164A CN101557217A (en) | 2008-04-08 | 2008-04-08 | Multi-dimensional pulse width modulation method and multi-dimensional pulse width modulation signal generating device thereof |
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| CNA2008100892164A CN101557217A (en) | 2008-04-08 | 2008-04-08 | Multi-dimensional pulse width modulation method and multi-dimensional pulse width modulation signal generating device thereof |
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