CN101404488A - Synchronous generating system for triangular wave and synchronous generating circuit using triangular wave - Google Patents
Synchronous generating system for triangular wave and synchronous generating circuit using triangular wave Download PDFInfo
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- H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
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- H—ELECTRICITY
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Abstract
The inventive triangular wave synchronous generation circuit can generate a triangular wave with spread spectrum synchronously from the driving side and the driven side with identical peak value. The inventive triangular wave synchronous generation system, includes: a triangular wave generation section, for generating triangular waves with identical peak value and different cycles according to the preset sequence and time-series; a synchronous pulse generation section, for generating a triangular wave reference pulse whose cycles is corresponding to the cycles of the triangular waves; a duty cycle control section, for making that the pulse width of the triangular wave reference pulse set up as a reference cycle is different from the triangular wave reference pulse with other cycles in a plurality of cycles of the triangular reference pulse and is output as a triangular wave reference regeneration pulse; a reference pulse regeneration section, for regenerating the triangular wave reference regeneration pulse into a triangular wave reference pulse; a reference cycle detection section, for detecting the triangular wave reference pulse reference pulse with reference cycle based on different pulse widths; and a triangular wave regeneration section, for regenerating the triangular wave whose cycle is corresponding to the triangular wave reference pulse.
Description
Technical field
The present invention relates to a kind of triangular wave synchronous generation system of triangular wave and triangular wave synchronous generation circuit of use thereof of between different devices, synchronously generating, wherein this triangular wave is used to carry out pulse width modulation, to generate the pulse that PWM controls employed preset width.
The application is based on the Japanese patent application that proposed on October 3rd, 2007 2007-260262 number, and with it as priority, here cite its content.
Background technology
In the past, between speaker unit as the amplifier mounting type of object, for as boombox, when generating synchronously the triangular wave that the pulse duration of the pwm signal that drives loud speaker is controlled, as shown in figure 13, with the frequency identical with the triangle that is generated, duty ratio is 50: 50, sends the triangular wave reference pulse from a side device (master end) to the opposing party's device (slave end), utilizes this triangular wave reference pulse to generate triangular wave at slave end.
But, as the drive controlling of device digitized is encircled, in the driving of speaker drive or motor and power circuit, adopt under the situation of PWM control, when utilizing the triangular wave of same period to carry out the pulse width modulation of pwm signal, produce switching noise in drive division, this noise causes harmful effect via the electromagnetic radiation noise (EMI) of generations such as wiring pattern to other equipment.
Therefore, when incorporated amplifier carries out speaker drive by PWM control, produce above-mentioned EMI problem.
Therefore, by the triangular wave of the pulse width modulation of carrying out pwm signal is opened up frequently, with the frequency distribution exhibition of the EMI of the switch in the PWM modulation frequently, reduce peak value, suppress the mean value of EMI lower, reduced the influence (for example with reference to patent documentation 1) of noise thus other equipment by the time.
Similarly, in the driving of loud speaker, also the triangular wave of pulse duration of control pwm signal is opened up frequently, the pulse duration of the pwm signal that control generates, thus can reduce the influence of EMI.
Patent documentation 1: No. 3952970 communiques of Japan Patent
But, when using the triangular wave after opening up frequently, under the situation of the triangular wave reference pulse that above-mentioned conventional example is used to generate triangular wave,, the triangular wave reference pulse of loud speaker output is sent with single-shot continuously as the pulse of a plurality of frequencies as illustrated in fig. 14 for synchronous with loud speaker.
Therefore, because the cycle of triangular wave reference pulse respectively by exhibition frequently, so slave end can't detect the triangular wave reference pulse cycle separately of input; If when carrying out the Regeneration Treatment of the corresponding triangular wave of the triangular wave reference pulse different with the cycle, generate triangular wave owing to flow through the electric current corresponding with the cycle, therefore can generate the different triangular wave of peak value.
For example, in above-mentioned Figure 14, for the triangular wave reference pulse, utilizing with 250kHz is that jump the up and down 210kHz of 40kHz and the pulse of these three kinds of frequencies of 290kHz of center opened up frequently.
In this case, when the triangular wave reference pulse of frequency 210kHz was generated triangular wave as the triangular wave reference pulse of frequency 250kHz, because the cycle is long, therefore the electric charge quantitative change of being supplied with was many, thereby peakedness ratio fiducial value (dotted line) height (A point).
On the other hand, when the triangular wave reference pulse of frequency 290kHz was generated triangular wave as the triangular wave reference pulse of frequency 250kHz, because the cycle is short, therefore the quantity of electric charge of being supplied with tailed off, thereby peakedness ratio fiducial value low (B point).
In the control afterwards, since with the peak value of triangular wave as the control benchmark, so use different triangular waves between master end and the slave end, thereby the exhibition that can't realize triangular wave frequently synchronously, and the sound reproduction characteristic that is equipped with master end in the loud speaker etc. of stereo amplifier and slave end is different.
Summary of the invention
The present invention is in view of the above problems and proposes, its purpose be to provide a kind of can be in the triangular wave synchronous generation circuit of the triangular wave after generating exhibition frequently synchronously and with identical peak value between master end and the slave end.
Triangular wave synchronous generation system of the present invention, this triangular wave synchronous generation system sends the triangular wave reference pulse that is used to generate the triangular wave that both sides are synchronous and peak value is identical from the master end to slave end, described master end and described slave end generate described triangular wave synchronously, described master end has: the triangular wave generating unit, and it generates the triangular wave that peak value is identical and the cycle is different with predefined order and according to time series; The lock-out pulse generating unit, its generation cycle and described triangle corresponding described triangular wave reference pulse wave period; And duty ratio control part, they are in a plurality of cycles of described triangular wave reference pulse, make the pulse duration of the described triangular wave reference pulse that is set at reference period be different from the triangular wave reference pulse in other cycles and export as the regeneration pulse of triangular wave benchmark, described slave end has: the reference pulse reproducing unit, and it is regenerated as the triangular wave reference pulse by the regeneration pulse of described triangular wave benchmark; The reference period test section, it detects the described triangular wave reference pulse of described reference period from the regeneration pulse of described triangular wave benchmark according to the difference of described pulse duration; And the triangular wave reproducing unit, its described triangular wave reference pulse with described reference period is a benchmark, is regenerated as cycle and the corresponding triangular wave of importing successively according to the cycle of described predefined order of described triangular wave reference pulse.
Triangular wave synchronous generation system of the present invention is characterized in that, described duty ratio control part will be longer than the high level width of other described triangular wave reference pulses as the high level width setup of the described triangular wave reference pulse of described reference period.
Triangular wave synchronous generation system of the present invention, it is characterized in that, described reference period test section is got the described triangular wave reference pulse imported and is made the logic product of the signal that this triangular wave reference pulse postpones, and with the result of this logic product detection signal as reference period.
Triangular wave synchronous generation system of the present invention, it is characterized in that, make the high level width in the described triangular wave reference pulse of described reference period bigger, and make the high level width in the described triangular wave reference pulse beyond the described reference period littler than the time of described delay than the time of described delay.
Triangular wave synchronous generation circuit of the present invention, the master end and the slave end that are used for the triangular wave synchronous generation system, in described triangular wave synchronous generation system, send the triangular wave reference pulse that is used to generate the triangular wave that both sides are synchronous and peak value is identical from described master end to described slave end, described master end and described slave end generate described triangular wave synchronously, described triangular wave synchronous generation circuit comprises: the triangular wave generating unit, and it generates the triangular wave that peak value is identical and the cycle is different with predefined order and according to time series; The lock-out pulse generating unit, its generation cycle and described triangle corresponding described triangular wave reference pulse wave period; The duty ratio control part, it made the duty ratio of the described triangular wave reference pulse that is set at reference period be different from the triangular wave reference pulse in other cycles and exports as the regeneration pulse of triangular wave benchmark in a plurality of cycles of described triangular wave reference pulse; The reference pulse reproducing unit, it is regenerated as the triangular wave reference pulse by the regeneration pulse of described triangular wave benchmark; The reference period test section, it detects the described triangular wave reference pulse of described reference period from the regeneration pulse of described triangular wave benchmark according to the difference of described duty ratio; And the triangular wave reproducing unit, its described triangular wave reference pulse with described reference period is a benchmark, is regenerated as cycle and the corresponding triangular wave of importing successively according to the cycle of described predefined order of described triangular wave reference pulse.
The invention effect
As described above described, according to the present invention, between master end and slave end, to generate the triangular wave reference pulse of the triangular wave after opening up frequently synchronously when slave end is communicated by letter, the different triangular wave benchmark regeneration pulse of pulse duration as the high level of the pulse duration of the high level of the triangular wave reference pulse that makes reference period and the triangular wave reference pulse beyond the reference period sends, therefore detect the triangular wave reference pulse of reference period, with this triangular wave reference pulse as benchmark, corresponding with the order that the predefined cycle changes, and be regenerated as triangular wave accordingly with the cycle of each triangular wave reference pulse, therefore can obtain can be in the master end and slave end obtain synchronously, and the effect of the triangular wave after the identical exhibition of peak value frequently.
Description of drawings
Fig. 1 is the block diagram of configuration example of the triangular wave synchronous generation system of expression an embodiment of the invention.
Fig. 2 is the block diagram of the configuration example of the triangular wave generating unit 12 in the presentation graphs 1.
Fig. 3 is the block diagram of the configuration example of the lock-out pulse generating unit 13 in the presentation graphs 1.
Fig. 4 is the block diagram of the configuration example of the duty ratio control part 14 in the presentation graphs 1.
Fig. 5 is the sequential chart of action example of the duty ratio control part 14 of key diagram 4.
Fig. 6 is the block diagram of the configuration example of the reference pulse reproducing unit 22 in the presentation graphs 1.
Fig. 7 is the sequential chart of action example of the reference pulse reproducing unit 22 of key diagram 6.
Fig. 8 is the block diagram of the configuration example of the reference period test section 23 in the presentation graphs 1.
Fig. 9 is the sequential chart of action example of the reference period test section 23 of key diagram 8.
Figure 10 is the block diagram of the configuration example of the triangular wave reproducing unit 24 in the presentation graphs 1.
Figure 11 is the oscillogram of action example of the triangular wave reproducing unit 24 of explanation Figure 10.
Figure 12 is explanation becomes the action example of triangular wave at aggressive device 1 one adnations of present embodiment a oscillogram.
Figure 13 is the oscillogram of generation that is used for illustrating the triangular wave of conventional example.
Figure 14 is the oscillogram of the shortcoming in the regeneration of the pairing triangular wave reference pulse of triangular wave after the explanation exhibition frequently.
Embodiment
Following triangular wave synchronous generation system with reference to description of drawings an embodiment of the invention.
Fig. 1 is the block diagram of the configuration example of the triangular wave synchronous generation system in this execution mode of expression.
For example, above-mentioned triangular wave synchronous generation system is used under the situation of boombox, forms to add to and be equipped on structure in the loud speaker, control the pwm control circuit (not shown) that carries out speaker drive by PWM.In this case, the 1 generation cycle of aggressive device is opened up the triangular wave of crossing frequently, is used for the PWM control of self, and slave unit 2 is sent the triangular wave reference pulse that is used to be regenerated as the triangular wave that is generated.Thus, slave unit 2 is obtained synchronously by the triangular wave reference pulse and the aggressive device 1 of input, and identical triangular wave of the cycle that is regenerated as.
In the figure, aggressive device has control part 11, triangular wave generating unit 12, lock-out pulse generating unit 13, duty ratio control part 14 and sending part 15.
Triangular wave generating unit 12 is by being that these three kinds of triangular waves of T1, T2 and T3 generate repeatedly with predefined order and according to time series from the above-mentioned cycle control signal of control part 11 input with a plurality of cycles, for example cycle.
13 generation cycles of lock-out pulse generating unit, duty ratio corresponding with above-mentioned triangular wave is 50: 50 triangular wave reference pulse.
Duty ratio control part 14 makes the duty ratio of the triangular wave reference pulse in the cycle that is set to reference period in a plurality of cycles be different from the duty ratio of the triangular wave reference pulse in other cycles, as the regeneration pulse of triangular wave benchmark, export to slave unit 2 by sending part 14.
On the other hand, slave unit 2 has acceptance division 21, reference pulse reproducing unit 22, reference period test section 23 and triangular wave reproducing unit 24.
Reference pulse reproducing unit 22 is by be used to the to regenerate above-mentioned triangular wave reference pulse of triangular wave of the above-mentioned triangular wave benchmark regeneration pulse regeneration by acceptance division 21 input.
Reference period test section 23 according to the difference of each duty ratio by detecting the triangular wave benchmark regeneration pulse corresponding in the above-mentioned triangular wave benchmark regeneration pulse by acceptance division 21 inputs with the triangular wave reference pulse of reference period, and output detection signal.
The triangular wave reference pulse in 24 detection reference cycles of triangular wave reproducing unit, thus generate and corresponding triangular wave of the cycle of each triangular wave reference pulse according to above-mentioned predefined order (identical) with the order of in aggressive device 1, setting.
The formation of above-mentioned triangular wave generating unit 12 then, is described with reference to Fig. 2.Fig. 2 is the block diagram of configuration example of the triangular wave generating unit 12 of expression present embodiment.
Triangular wave generating unit 12 is charged to the electric capacity that is inserted between lead-out terminal TOUT and the earth point by the electric current of deciding that is located at the constant current source between power supply and the lead-out terminal TOUT, perhaps discharge, thereby generate triangular wave by the electric current of deciding that is located at the constant current source between lead-out terminal TOUT and the earth point.Discharge and recharge the employed identical constant current source of electric current of deciding by paired use and this, can generate the rise time triangular wave identical with fall time.
In the present embodiment, the different a plurality of constant current sources of the current value setting of pair connecting with switch separately forms and makes different exhibition structure frequently of triangular wave cycle.In the following description of the embodiment,, open up frequently with the cycle (three different frequencies) of three different lengths, form the triangle wave structure that generates each cycle according to time series one by one periodically repeatedly as an example.
That is, triangular wave generating unit 12 is by the above-mentioned cycle control signal from control part 1 input, and as a plurality of cycles, generating above-mentioned three cycles, for example cycle is these three kinds of triangular waves of T0, T1 and T2.At this, width is the relation of T1＜T2＜T0.
For example, triangular wave generating unit 12 has the constant current source 51 that is connected in series with switch SW 11 between power supply and lead-out terminal TOUT, the constant current source 52 that is connected in series with switch SW 12 and the constant current source 53 that is connected in series with switch SW 13, the constant current source 62 that between lead-out terminal TOUT and earth point, has the constant current source 61 that is connected in series with switch SW 21, is connected in series with switch SW 22 and with the constant current source 63 that switch SW 23 is connected in series, comprise the capacitor C that is inserted between lead-out terminal TOUT and the earth point.
Constant current source 51 and 61 flows through the electric current of identical current value I 1, and constant current source 52 and 62 flows through the electric current of identical current value I 2, and constant current source 53 and 63 flows through the electric current of identical current value I 3, and it is right to constitute constant current source respectively.At this, the relation of current value I 1, I2 and I3 is set to I1＜I2＜I3.
In addition, though do not express in Fig. 2, triangular wave generating unit 12 comprises the bias circuit of setting from the center voltage of the triangular wave of lead-out terminal TOUT output.
And the triangular wave reproducing unit 24 in the aftermentioned slave unit 2 also has the formation same with above-mentioned triangular wave generating unit 12, generates the triangular wave in the cycle after the exhibition frequently.
The formation of above-mentioned lock-out pulse generating unit 13 then, is described with reference to Fig. 3.Fig. 3 is the block diagram of configuration example of the lock-out pulse generating unit 13 of expression present embodiment.
Lock-out pulse generating unit 13 is made of comparator 41, comparator 42 and latch 43.
And comparator 42 is at the signal voltage of counter-rotating input terminal input triangular wave, and the minimum value of importing triangular wave at non-counter-rotating input terminal is threshold voltage TRIL.When comparator 42 is lower than above-mentioned threshold voltage TRIL at the signal voltage of triangular wave, the setting signal of output high level.
Therefore, lock-out pulse generating unit 13 is exported the triangular wave reference pulse of high level in the uphill process of triangular wave, on the other hand, and the triangular wave reference pulse of output low level in the decline process of triangular wave.
Secondly, the formation of above-mentioned duty ratio control part 14 is described with reference to Fig. 4 and Fig. 5.Fig. 4 is the block diagram of configuration example of the duty ratio control part 14 of expression present embodiment.Fig. 5 is the sequential chart of action of the each several part of explanation duty ratio control part 14.
Duty ratio control part 14 is made of switching part 71, width adjustment portion 72, width adjustment portion 73 and logic OR circuit 74.
Switching part 71 is by selecting signal to switch from the benchmark of control part 11 inputs, will be input to any width adjustment portion 72 and the width adjustment portion 73 from the triangular wave reference pulse of lock-out pulse generating unit 13 inputs.At this, above-mentioned control part 11 selects signal to 14 outputs of duty ratio control part benchmark when the triangular wave that generates as cycle of benchmark.
As shown in Figure 5, select at input reference not under the situation of signal, the triangular wave reference pulse that switching part 71 is imported to 72 outputs of width adjustment portion is selected at input reference under the situation of signal, with the triangular wave reference pulse imported to 73 outputs of width adjustment portion.
And width adjustment portion 73 is the pulse of the high level of time T PW according to the rising edge of the high level of the triangular wave reference pulse of input and the sequential output pulse width of trailing edge.
At this, the pass of above-mentioned time T PN and time T PW is TPN＜TPW.
The pulse-width that logic OR circuit 74 synthesizes from width adjustment part 72 and width adjustment portion 73 exports is respectively modulated the triangular wave reference pulse of back (duty ratio is modulated the back), exports as the regeneration pulse of triangular wave benchmark.
The formation of said reference pulse regneration portion 22 then, is described with reference to Fig. 6 and Fig. 7.Fig. 6 is the block diagram of configuration example of the reference pulse reproducing unit 22 of expression present embodiment.Fig. 7 is the sequential chart of action of the each several part of explanation reference pulse reproducing unit 22.
As shown in Figure 6, reference pulse reproducing unit 22 for example is made of the d type flip flop 75 that lead-out terminal QB is connected with input terminal D.At this, the triangular wave reference pulse of regeneration is exported from lead-out terminal Q.
When reference pulse reproducing unit 22 is imported the regeneration pulse of triangular wave benchmark in clock terminal CK, rising edge according to this triangular wave benchmark regeneration pulse is exported the dateout of lead-out terminal QB successively from lead-out terminal Q, therefore can be regenerated as the triangular wave reference pulse as illustrated in fig. 7.
The formation of said reference cycle detection portion 23 then, is described with reference to Fig. 8 and Fig. 9.Fig. 8 is the block diagram of configuration example of the reference period test section 23 of expression present embodiment.Fig. 9 is the sequential chart of action of the each several part of explanation reference period test section 23.
Reference period test section 23 for example is made of delay portion 76 and logical AND circuit 77.
The logic product of the triangular wave benchmark regeneration pulse that logical AND circuit 77 is got input and triangular wave benchmark regeneration pulse after the delay of delay portion 76 inputs is exported the result of logic product as detection signal.
At this moment, logical AND circuit 77 signal of output high level than the triangular wave benchmark regeneration pulse of the reference period of the long time T PW of above-mentioned time of delay of TPD time the only.
The formation of above-mentioned triangular wave reproducing unit 24 then, is described with reference to Figure 10 and Figure 11.Figure 10 is the block diagram of configuration example of the triangular wave reproducing unit 24 of expression present embodiment.Figure 11 is the sequential chart of action example of the triangular wave reproducing unit 24 of explanation present embodiment.
For example as shown in figure 10, triangular wave reproducing unit 24 is made of counter 81, selection control part 82 and triangular wave generating unit 83.This triangular wave generating unit 83 is same formation with triangular wave generating unit 12 shown in Figure 2.
The triangular wave reference pulse is input to clock terminal CLK, and counter 81 carries out the counting of umber of pulse according to the rising edge of high level, count value is exported to selected control part 82.And counter 81 is reset to count value " 0 " when detection signal is input to reseting terminal R.
Thus, count value is reset to " 0 " when the triangular wave reference pulse in input reference cycle, form " ... → ' 0 ' → ' 1 ' → ' 2 ' → ' 0 ' → ' 1 ' ... " ", form the circulation of " 0 "～" 2 ".
In this count value, " 0 " expression generates the pattern of the triangular wave reference pulse of period T 0, and " 1 " expression generates the pattern of the triangular wave reference pulse of period T 1, and " 2 " expression generates the pattern of the triangular wave reference pulse of period T 2.
For example, in order to generate the triangular wave of period T 1, carry out discharging and recharging of electric capacity according to the current value that current value I 3 and current value I 2 additions are obtained.And, in order to generate the triangular wave of period T 2, carry out discharging and recharging of electric capacity according to the current value that current value I 2 and current value I 1 addition are obtained.And,, carry out discharging and recharging of electric capacity according to current value I 3 in order to generate the triangular wave of period T 0.
At this, selecting control part 82 to become under the situation of pattern of the triangular wave that generates period T 0, between the high period of the triangular wave reference pulse of period T 0, switch SW 11, SW12, SW21, SW22, SW23 are made as the control signal that off-state, switch SW 13 are made as on-state to 83 outputs of triangular wave generating unit.
Thus, triangular wave generating unit 83 is made as off-state with switch SW 11, SW12, SW21, SW22, SW23, and switch 13 is made as on-state, flow through the electric current of current value I 3 from constant current source 53, in capacitor C, accumulate electric charge, voltage linear is risen, generate the waveform of the elevated areas of triangular wave.
On the other hand, selecting control part 82 to become under the situation of pattern of the triangular wave that generates period T 0, between the low period of the triangular wave reference pulse of period T 0, switch SW 11, SW12, SW13, SW21, SW22 are made as off-state, switch SW 23 are made as the control signal of on-state to 83 outputs of triangular wave generating unit.
Thus, triangular wave generating unit 83 is made as off-state with switch SW 11, SW12, SW13, SW21, SW22, and switch SW 23 is made as on-state, flow through the electric current of current value I 3 from constant current source 63, discharge electric charge from capacitor C, voltage linear is descended, generate the waveform in the decline zone of triangular wave.Thus, generate the triangular wave of period T 0.
In addition, selecting control part 82 to become under the situation of pattern of the triangular wave that generates period T 1, between the high period of the triangular wave reference pulse of period T 1, switch SW 11, SW21, SW22, SW23 are made as off-state, switch SW 12, SW13 are made as the control signal of on-state to 83 outputs of triangular wave generating unit.
Thus, triangular wave generating unit 83 is made as off-state with switch SW 11, SW21, SW22, SW23, switch SW 12, SW13 are made as on-state, flow through the electric current of current value I 2+I3 from constant current source 52 and 53, in capacitor C, accumulate electric charge, voltage linear is risen, generate the waveform of the elevated areas of triangular wave.
On the other hand, selecting control part 82 to become under the situation of pattern of the triangular wave that generates period T 1, between the low period of the triangular wave reference pulse of period T 1, switch SW 11, SW12, SW13, SW21 are made as off-state, switch SW 22, SW23 are made as the control signal of on-state to 83 outputs of triangular wave generating unit.
Thus, triangular wave generating unit 83 is made as off-state with switch SW 11, SW12, SW13, SW21, switch SW 22, SW23 are made as on-state, flow through the electric current of current value I 2+I3 from constant current source 62 and 63, discharge electric charge by capacitor C, voltage linear is descended, generate the waveform in the decline zone of triangular wave.Thus, generate the triangular wave of period T 1.
In addition, selecting control part 82 to become under the situation of pattern of the triangular wave that generates period T 2, between the high period of the triangular wave reference pulse of period T 2, switch SW 13, SW21, SW22, SW23 are made as off-state, switch SW 11, SW12 are made as the control signal of on-state to 83 outputs of triangular wave generating unit.
Thus, triangular wave generating unit 83 is made as off-state with switch SW 13, SW21, SW22, SW23, switch SW 11, SW12 are made as on-state, flow through the electric current of current value I 1+I2 from constant current source 51 and 52, in capacitor C, accumulate electric charge, voltage linear is risen, generate the waveform of the elevated areas of triangular wave.
On the other hand, selecting control part 82 to become under the situation of pattern of the triangular wave that generates period T 2, between the low period of the triangular wave reference pulse of period T 2, switch SW 11, SW12, SW13, SW23 are made as off-state, switch SW 21, SW22 are made as the control signal of on-state to 83 outputs of triangular wave generating unit.
Thus, triangular wave generating unit 83 is made as off-state with switch SW 11, SW12, SW13, SW23, switch SW 21, SW22 are made as on-state, flow through the electric current of current value I 1+I2 from constant current source 61 and 62, discharge electric charge by capacitor C, voltage linear is descended, generate the waveform in the decline zone of triangular wave.Thus, generate the triangular wave of period T 2.
Secondly, with reference to Fig. 1～Figure 12 the action of the described triangular wave synchronous generation system of present embodiment is described.Figure 12 is explanation becomes the action of triangular wave at aggressive device 1 one adnations a oscillogram.
That is, control part 11 becomes under the situation of pattern of the triangular wave that generates period T 0, to 12 outputs of triangular wave generating unit switch SW 11, SW12, SW21, SW22, SW23 is made as off-state, switch SW 13 is made as the control signal of on-state.
Thus, triangular wave generating unit 12 flows through the electric current of current value I 3 from constant current source 53, accumulates electric charge in capacitor C, generates the waveform of the elevated areas of triangular wave.
And, when lock-out pulse generating unit 13 surpasses threshold voltage TRIH at the voltage of triangular signal, to control part 11 output reset signals.
When the above-mentioned reset signal of input, control part 11 is made as the control signal that off-state is made as switch SW 23 on-state to 12 outputs of triangular wave generating unit with switch SW 11, SW12, SW13, SW21, SW22.
Thus, triangular wave generating unit 12 is made as off-state with switch SW 11, SW12, SW13, SW21, SW22, and switch SW 23 is made as on-state, flow through the electric current of current value I 3 from constant current source 63, discharge electric charge by capacitor C, voltage linear is descended, generate the waveform in the decline zone of triangular wave.Thus, generate the triangular wave of period T 0.
And lock-out pulse generating unit 13 is exported setting signals to control part 11 when the voltage of triangular signal is lower than threshold voltage TRIL.
When the above-mentioned setting signal of input, control part 11 becomes the pattern of the triangular wave that generates period T 1, to 12 outputs of triangular wave generating unit switch SW 11, SW21, SW22, SW23 is made as off-state, switch SW 12, SW13 is made as the control signal of on-state.
Thus, triangular wave generating unit 12 is made as off-state with switch SW 11, SW21, SW22, SW23, switch SW 12, SW13 are made as on-state, flow through the electric current of current value I 2+I3 from constant current source 52 and 53, in capacitor C, accumulate electric charge, voltage linear is risen, generate the waveform of the elevated areas of triangular wave.
And, when lock-out pulse generating unit 13 surpasses threshold voltage TRIH at the voltage of triangular signal, to control part 11 output reset signals.
After importing above-mentioned reset signal, control part 11 becomes the pattern of the triangular wave that generates period T 1, to 12 outputs of triangular wave generating unit switch SW 11, SW12, SW13, SW21 is made as off-state, switch SW 22, SW23 is made as the control signal of on-state.
Thus, triangular wave generating unit 12 is made as off-state with switch SW 11, SW12, SW13, SW21, switch SW 22, SW23 are made as on-state, flow through the electric current of current value I 2+I3 from constant current source 62 and 63, discharge electric charge by capacitor C, voltage linear is descended, generate the waveform in the decline zone of triangular wave.Thus, generate the triangular wave of period T 1.
And, when lock-out pulse generating unit 13 is lower than threshold voltage TRIL at the voltage of triangular signal, to control part 11 output setting signals.
When the above-mentioned setting signal of input, control part 11 transition are the pattern of the triangular wave that generates period T 2, to 12 outputs of triangular wave generating unit switch SW 13, SW21, SW22, SW23 are made as off-state, switch SW 11, SW12 are made as the control signal of on-state.
Thus, triangular wave generating unit 12 is made as off-state with switch SW 13, SW21, SW22, SW23, switch SW 11, SW12 are made as on-state, flow through the electric current of current value I 1+I2 from constant current source 51 and 52, in capacitor C, accumulate electric charge, voltage linear is risen, generate the waveform of the elevated areas of triangular wave.
And lock-out pulse generating unit 13 is exported reset signals to control part 11 when the voltage of triangular signal surpasses threshold voltage TRIH.
When the above-mentioned reset signal of input, control part 11 becomes the pattern of the triangular wave that generates period T 2, thereby to 12 outputs of triangular wave generating unit switch SW 11, SW12, SW13, SW23 is made as off-state, switch SW 21, SW22 is made as the control signal of on-state.
Thus, triangular wave generating unit 12 is made as off-state with switch SW 11, SW12, SW13, SW23, switch SW 21, SW22 are made as on-state, flow through the electric current of current value I 1+I2 from constant current source 61 and 62, discharge electric charge by capacitor C, voltage linear is descended, generate the waveform in the decline zone of triangular wave.Thus, generate the triangular wave of period T 2.
And, when lock-out pulse generating unit 13 is lower than threshold voltage TRIL at the voltage of triangular signal, to control part 11 output setting signals.
Thus, control part 11 transition are the pattern of the triangular wave of generation period T 0, generate the triangular wave of above-mentioned period T 0, T1 and T2 successively according to time series with respect to triangular wave generating unit 12.
In above-mentioned triangular wave generative process, setting signal and reset signal that lock-out pulse generating unit 13 generates according to inside, as stating, make signal transition to high level according to setting signal, to low level, generate triangular wave reference pulse according to the reset enable signal signal transition thus corresponding to period T 0, T1 and the T2 of each triangular wave.
And duty ratio control part 14 generates triangular wave benchmark regeneration pulse shown in Figure 5 according to above-mentioned triangular wave reference pulse, and sends to slave unit 2 via sending part.At this moment, duty ratio control part 14 makes the pulse duration of the triangular wave benchmark regeneration pulse corresponding with the triangular wave reference pulse of the period T 0 that is set at reference period with time (wideer pulse duration) output longer than the triangular wave reference pulse in other cycles.
Then, in slave unit 2, reference pulse reproducing unit 22 alternately generates high level and low level output according to the rising edge to the triangular wave benchmark regeneration pulse of the CK terminal input of the d type flip flop 75 of inside, and it is exported as the triangular wave reference pulse.When the action beginning, d type flip flop 75 is resetted, lead-out terminal Q is a low level, lead-out terminal QB is a high level.
And, reference period test section 23 is under the situation of pulse of reference period in the regeneration pulse of triangular wave benchmark, because the time T PW of the triangular wave benchmark regeneration pulse of reference period is longer than TPD time of delay of delay portion 76, so the high level region overlapping of the high level of the triangular wave benchmark regeneration pulse that postpones zone and the regeneration pulse of undelayed triangular wave benchmark, output detection signal.
On the other hand, reference period test section 23 is not under the situation of pulse of reference period in the regeneration pulse of triangular wave benchmark, because the time T PN of the triangular wave benchmark regeneration pulse of reference period is shorter than TPD time of delay of delay portion 76, so the high level zone of the triangular wave benchmark regeneration pulse that postpones not with the high level region overlapping of the triangular wave benchmark regeneration pulse that is not delayed, not output detection signal.
Triangular wave reproducing unit 24 generates triangular wave according to the triangular wave reference pulse and the above-mentioned detection signal that are reproduced by the action among Figure 11.
By above-mentioned processing, the triangular wave synchronous generation system of present embodiment will generate the triangular wave reference pulse of the triangular wave after the exhibition frequently synchronously when slave end is communicated by letter, the triangular wave benchmark regeneration pulse different with the pulse duration of the high level of reference period triangular wave reference pulse in addition sends aggressive device 1 as the pulse duration of the high level of the triangular wave reference pulse that makes reference period, therefore detect the triangular wave reference pulse of reference period by slave unit 2, with this triangular wave reference pulse as benchmark, corresponding with the variation order in predefined cycle, and with the cycle of each triangular wave reference pulse triangular wave of regenerating accordingly, thereby can obtain can be at the triangular wave after master end and slave end obtains synchronously and peak value the is identical exhibition frequently.
And, also can constitute: in same device, carry control part 11, triangular wave generating unit 12, lock-out pulse generating unit 13, duty ratio control part 14 and the sending part 15 in the above-mentioned aggressive device 1, acceptance division 21, reference pulse reproducing unit 22, reference period test section 23 and the triangular wave reproducing unit 24 in the slave unit 2, constitute the system that changes slave unit and aggressive device arbitrarily.
And what triangular wave had been described hereinbefore is three kinds formation synchronously, but is not limited to this example, also can constitute the synchronous formation that obtains a plurality of triangular waves.
And, select SW11～13 and SW21～23 change action separately of control part 82 also to be not limited to above-mentioned example, can at random set.
And the relation that also can constitute the non-counter-rotating input terminal that makes comparator shown in Figure 3 and counter-rotating input terminal is opposite, and setting voltage is opposite.
And, in duty ratio control part 14 shown in Figure 4, also switching part 71 can be configured in the back segment of width adjustment portion 72 and 73.
In addition, the triangular wave generating unit also can and use the time constant circuit of resistance to constitute by electric capacity.
Claims (5)
1. triangular wave synchronous generation system, this triangular wave synchronous generation system send the triangular wave reference pulse that is used to generate the triangular wave that both sides are synchronous and peak value is identical from the master end to slave end, and described master end and described slave end generate described triangular wave synchronously,
Described master end has:
The triangular wave generating unit, it generates the triangular wave that peak value is identical and the cycle is different with predefined order and according to time series;
The lock-out pulse generating unit, its generation cycle and described triangle corresponding described triangular wave reference pulse wave period; And
The duty ratio control part, it makes the pulse duration of the described triangular wave reference pulse that is set at reference period be different from the triangular wave reference pulse in other cycles and as triangular wave benchmark regeneration pulse output in a plurality of cycles of described triangular wave reference pulse,
Described slave end comprises at least:
The reference pulse reproducing unit, it is regenerated as the triangular wave reference pulse by the regeneration pulse of described triangular wave benchmark;
The reference period test section, it detects the described triangular wave reference pulse of described reference period from the regeneration pulse of described triangular wave benchmark according to the difference of described pulse duration; And
The triangular wave reproducing unit, its described triangular wave reference pulse with described reference period is a benchmark, is regenerated as cycle and the corresponding triangular wave of importing successively according to the cycle of described predefined order of described triangular wave reference pulse.
2. triangular wave synchronous generation system according to claim 1 is characterized in that,
Described duty ratio control part will be longer than the high level width of other described triangular wave reference pulses as the high level width setup of the described triangular wave reference pulse of described reference period.
3. triangular wave synchronous generation system according to claim 2 is characterized in that,
Described reference period test section is got the described triangular wave reference pulse imported and is made the logic product of the signal that this triangular wave reference pulse postpones, and with the result of this logic product detection signal as reference period.
4. triangular wave synchronous generation system according to claim 3 is characterized in that,
Make the high level width in the described triangular wave reference pulse of described reference period bigger, and make the high level width in the described triangular wave reference pulse beyond the described reference period littler than the time of described delay than the time of described delay.
5. triangular wave synchronous generation circuit, the master end and the slave end that are used for the triangular wave synchronous generation system, in described triangular wave synchronous generation system, send the triangular wave reference pulse that is used to generate the triangular wave that both sides are synchronous and peak value is identical from described master end to described slave end, described master end and described slave end generate described triangular wave synchronously
Described triangular wave synchronous generation circuit comprises at least:
The triangular wave generating unit, it generates the triangular wave that peak value is identical and the cycle is different with predefined order and according to time series;
The lock-out pulse generating unit, its generation cycle and described triangle corresponding described triangular wave reference pulse wave period;
The duty ratio control part, it made the duty ratio of the described triangular wave reference pulse that is set at reference period be different from the triangular wave reference pulse in other cycles and exports as the regeneration pulse of triangular wave benchmark in a plurality of cycles of described triangular wave reference pulse;
The reference pulse reproducing unit, it is regenerated as the triangular wave reference pulse by the regeneration pulse of described triangular wave benchmark;
The reference period test section, it detects the described triangular wave reference pulse of described reference period from the regeneration pulse of described triangular wave benchmark according to the difference of described duty ratio; And
The triangular wave reproducing unit, its described triangular wave reference pulse with described reference period is a benchmark, is regenerated as cycle and the corresponding triangular wave of importing successively according to the cycle of described predefined order of described triangular wave reference pulse.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP2007260262 | 2007-10-03 | ||
| JP2007-260262 | 2007-10-03 | ||
| JP2007260262A JP5130858B2 (en) | 2007-10-03 | 2007-10-03 | Triangular wave synchronization generation system and triangular wave synchronization generation circuit used therefor |
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| CN101404488A true CN101404488A (en) | 2009-04-08 |
| CN101404488B CN101404488B (en) | 2011-01-05 |
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| JP (1) | JP5130858B2 (en) |
| KR (1) | KR101042235B1 (en) |
| CN (1) | CN101404488B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175898A (en) * | 2010-12-31 | 2011-09-07 | 东莞市新铂铼电子有限公司 | Method for making high-voltage triangular voltage wave generator and high voltage-triangular voltage wave generator |
| CN106877846A (en) * | 2017-03-28 | 2017-06-20 | 杰华特微电子（张家港）有限公司 | A kind of pulse-generating circuit, switching power circuit and average current computational methods |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101801199B1 (en) | 2011-07-25 | 2017-11-24 | 한국전자통신연구원 | Triangular waveform generator and method for generating triangular waveform thereof |
| JP5928788B2 (en) * | 2012-02-22 | 2016-06-01 | 富士電機株式会社 | Induction heating device |
| KR101412807B1 (en) * | 2012-11-13 | 2014-06-27 | 삼성전기주식회사 | Triangular waveform generating apparatus |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5291562A (en) * | 1990-01-22 | 1994-03-01 | Fuji Photo Film Co., Ltd. | Image signal processing apparatus producing a narrowed pulse width modulated signal using an asymmetrically centered triangle reference waveform |
| JPH08293767A (en) * | 1995-04-19 | 1996-11-05 | Toyota Autom Loom Works Ltd | Triangular wave oscillation circuit |
| JP4057438B2 (en) * | 2003-02-04 | 2008-03-05 | ローム株式会社 | Triangular wave phase synchronization method and system |
| JP4017537B2 (en) * | 2003-02-12 | 2007-12-05 | 株式会社ルネサステクノロジ | Oscillator circuit |
| US7483448B2 (en) * | 2004-03-10 | 2009-01-27 | Alcatel-Lucent Usa Inc. | Method and system for the clock synchronization of network terminals |
| JP4685602B2 (en) * | 2005-11-16 | 2011-05-18 | ローム株式会社 | Triangular wave generation circuit, inverter using the same, light emitting device, liquid crystal television |
| TWI297974B (en) * | 2006-02-08 | 2008-06-11 | Beyond Innovation Tech Co Ltd | Control circuit, loading system therewith and amplitude-frequency adjustable triangle wave generator |
| JP2007266908A (en) * | 2006-03-28 | 2007-10-11 | Aisin Seiki Co Ltd | Pulse signal generating circuit |
| JP2007274743A (en) | 2007-07-26 | 2007-10-18 | Renesas Technology Corp | Oscillation circuit |
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2007
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175898A (en) * | 2010-12-31 | 2011-09-07 | 东莞市新铂铼电子有限公司 | Method for making high-voltage triangular voltage wave generator and high voltage-triangular voltage wave generator |
| CN102175898B (en) * | 2010-12-31 | 2013-05-29 | 东莞市新铂铼电子有限公司 | Method for making high-voltage triangular voltage wave generator and high voltage-triangular voltage wave generator |
| CN106877846A (en) * | 2017-03-28 | 2017-06-20 | 杰华特微电子（张家港）有限公司 | A kind of pulse-generating circuit, switching power circuit and average current computational methods |
| CN106877846B (en) * | 2017-03-28 | 2023-06-16 | 杰华特微电子（张家港）有限公司 | Pulse generation circuit, switching power supply circuit and average current calculation method |
Also Published As
| Publication number | Publication date |
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| KR101042235B1 (en) | 2011-06-17 |
| JP2009094567A (en) | 2009-04-30 |
| JP5130858B2 (en) | 2013-01-30 |
| KR20090034732A (en) | 2009-04-08 |
| CN101404488B (en) | 2011-01-05 |
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