TWI403092B - Means for adjusting one or more of the same period but with different pulse width signals to synchronize the trigger / cutoff signal - Google Patents

Description

Apparatus and method for adjusting one or more signals of the same period but having different pulse widths to have a synchronous trigger/cutoff signal

The invention relates to a device capable of converting one or a plurality of pulse width adjustment signals of the same period but having different pulse widths, and converting one or more pulse width adjustment signals which can be synchronously triggered or synchronously cut off. method.

The pulse width adjustment technology is commonly used as a method for adjusting the average voltage and the regulation speed of the DC motor in the DC system.

However, in the analog analog pulse width adjustment system, if a triangular wave generation circuit is used, the pulse width adjustment signal cannot be triggered or turned off synchronously with the signal source, and the circuit and pulse width adjustment signal are as shown in FIG.

Furthermore, in the analog analog pulse width adjustment system, if more than two pulse width adjustment signals are generated, the synchronous trigger or cutoff may not be obtained due to the difference in pulse width, and the circuit and pulse width may be obtained. The adjustment signal is shown in Figure 2.

The above situation in which synchronization trigger or cutoff is not possible will cause the DC system device that needs to be triggered or turned off synchronously to generate phase and synchronous trigger offset.

It is an object of the present invention to obtain a new trigger level control signal via a first DC average voltage converter and a first subtractor with pulse wave width adjustment signals of the same period but having different pulse widths.

Another object of the present invention is to generate a synchronous trigger signal after passing a new trigger level control signal and a negative slope sawtooth signal having the same period as the original signal through the first comparator.

Another object of the present invention is to utilize a first phase locked loop to compensate and adjust a new pulse width adjustment signal to produce one or a plurality of pulse width adjustment signals that are simultaneously triggerable.

Another object of the present invention is to obtain a new trigger level control signal by a pulse width adjustment signal of the same period but having different pulse widths via a second DC average voltage converter.

Another object of the present invention is to generate a synchronous cutoff signal after passing a new trigger level control signal and a positive slope sawtooth signal having the same period as the original signal through the second comparator.

Another object of the present invention is to utilize a second phase locked loop to compensate and adjust the new pulse width adjustment signal to produce one or a plurality of pulse width adjustment signals that can be synchronously turned off.

One or more signals of the same period but having different pulse widths can be adjusted to have a synchronous trigger/cutoff signal. As shown in FIG. 3, one or more pulse width adjustment signals of the same period but different pulse widths are used. I/P ₁ ... I/P _n , input to a device unit 1 that can adjust one or more signals of the same period but having different pulse widths to have a synchronous trigger/cutoff signal, and one or more of the same periods can be passed However, the signals having different pulse widths are adjusted to the selector 2 of the device unit 1 having the synchronous trigger/cutoff signal, and the selector 2 can select the synchronous trigger or the synchronous cutoff for the switching switch, and the same can be selected after the selector is selected. Pulse width adjustment input signals I/P ₁ ... I/P _n signals with different pulse widths are transmitted to signals that can make one or more signals of the same period but with different pulse widths adjusted to have synchronous trigger/cutoff The device unit 1 of the signal has a device 10 for synchronously triggering one or a plurality of pulse width adjustment signals or a device 30 for synchronously cutting off one or more pulse width adjustment signals, Means for generating a plurality of control or synchronization with the trigger / OFF pulse width adjustment signal, outputted to the output terminal.

As shown in FIG. 4, the device for synchronously triggering one or a plurality of pulse width adjustment signals inputs one or a plurality of pulse width adjustment signals I/P ₁ ... I/P _n of the same period but having different pulse widths. The device 10 with synchronously triggering one or a plurality of pulse width adjustment signals, after passing through the first DC average voltage converter 11, will obtain an individual DC average voltage V _dcn as shown in FIG. 5, and its DC average voltage magnitude. As follows: where V _cc = 5 volts

V _dc1 =V _cc *△T _{on1 /T.........(1} )

_{V dcn = V cc * △ T} onn / T ......... (2)

The waveform relationship of I/P ₁ ... I/P _n and V _dc1 ... V _dcn is also shown in FIG.

_{I / P 1 ... I / P} n signals, while passing through a device having a pulse width or a plurality of adjustment of the trigger signal synchronized signal detector 10 a first time base generator 14, through the synchronization with a trigger or a plurality The sawtooth wave generator (Vc3) of the same period and negative slope sawtooth wave generator 15 of the pulse width adjustment signal device 10 outputs a negative slope of the same period as the original signal as shown in FIG.

Because the pulse width is still the same as the pulse width of the original signal while the synchronous trigger is obtained, the size of the new trigger level control signal V _tcn is analyzed as shown in Figure 5 and Figure 6 below: Where V _cc = 5 volts

_{V dcn = V cc * △ T} onn / T ......... (3)

= [Alpha] _n the duty cycle of the n-th signal = ON time of the n-th signal / cycle _{= △ T onn / T = V} dcn / V cc ......... (4)

According to Figure 6: V _cc /T=(V _cc -V _tcn) /△T _onn .........(5)

Then ΔT _onn /T=(V _cc -V _tcn) /V _cc .........(6)

From (3) to give _{V dcn / V cc = / (} V cc -V tcn) / V cc ......... (7)

Then V _cc -V _dcn =V _tcn ............(8)

Based on the above analysis, after V _cc and V _dcn pass through the first subtractor 12 of the device 10 for synchronously triggering one or a plurality of pulse width adjustment signals, a new trigger level control signal V _tcn can be generated, and the waveform thereof is as shown in the figure. Seven shows.

The new trigger level control signal V _tcn and the signal of the sawtooth generator having the same period negative slope pass through the first comparator 13 of the device 10 with the one or more pulse width adjustment signals simultaneously triggered, and the design time will be The new trigger level control signal V _{tcn is} connected to the inverting input terminal of the first comparator 13 and the signal of the sawtooth wave generator having the same period negative slope is connected to the non-inverting input terminal of the first comparator 13 , either The new trigger level control signal V _tcn is initially smaller than the signal of the sawtooth generator of the same period negative slope, so the first comparator 13 outputs a high voltage signal V _cc , and the sawtooth generator with the same period negative slope When the signal drops below the new trigger level control signal V _tcn , the first comparator 13 outputs a low voltage signal of 0 volts until the signal of the next negative slope sawtooth generator repeats the same action. results may generate a trigger synchronous with the original signal cycles at the same time but not necessarily has a cut-off point and maintaining the original pulse width of the output signal _{O / P 1 ... O / P} n, shown in Figure 8, with the pulse width Small: wherein the V _cc = 5 V

△T _onn /T=(V _cc -V _tcn) /V _cc =V _dcn /V _cc = α _n = duty cycle of the nth signal = on time/period of the nth signal... (9)

The output signals O/P ₁ ... O/P _n pass through a typical first phase lock loop 20 for feedback compensation and adjustment, and one or more signals PWM ₁ and PWM ₂ with synchronous trigger but different pulse width adjustments can be obtained. , ... PWM _n , its output is shown in Figure 9, and output to the output.

As shown in FIG. 10, a device having synchronously cutting off one or a plurality of pulse width adjustment signals inputs one or a plurality of pulse width adjustment signals I/P ₁ ... I/P _n of the same period but having different pulse widths. After the second DC average voltage converter 31 passes through the second DC average voltage converter 31, the DC average voltage can be obtained as shown in FIG. 6, and the DC average voltage is as follows: V _cc = 5 volts

V _dc1 =V _cc *△T _{on1 /T.........(1} )

_{V dcn = V cc * △ T} onn / T ......... (2)

The waveform relationship of I/P ₁ ... I/P _n and V _dc1 ... V _dcn is also shown in Fig. 6.

The signals of I/P ₁ ... I/P _n are simultaneously passed through a second time base signal detecting generator 33 of the device 30 for synchronously turning off one or more pulse width adjusting signals, and a square wave synchronized with the original signal can be generated. (α = task cycle = on time / cycle = 50%), and then through the same period and positive slope sawtooth generator 34 with a device 30 that synchronously cuts off one or more pulse width adjustment signals, the output is compared with the original signal The sawtooth wave (Vf2) of the positive slope of the same period is shown in Fig. 11.

Because the pulse width is still the same as the pulse width of the original signal while the synchronization cutoff is achieved, the size of the new cutoff trigger level control signal V _etcn is analyzed as shown in Figure 5 and Figure 11. Shown: V _cc = 5 volts in the formula

_{V dcn = V cc * △ T} onn / T ......... (3)

And _{α n = △ T onn / T} = V dcn / V cc = duty cycle = the n-th signal of the ON time of the n-th signal / cycle ......... (4)

According to Figure 11: V _cc /T=(V _cc -V _etcn) /(TT ₁ ).........(10)

Then (TT ₁ )/T=(V _cc -V _etcn) /V _cc .........(11)

And T ₁ = △T _onn ............(12)

Then (T-△T _onn )/T=(V _cc -V _etcn) /V _cc ............(13)

Then 1-△T _onn /T=1-V _etcn /V _cc ............(14)

The _{V cc * △ T onn / T} = V etcn = V dcn ............ (15)

Based on the above analysis, after V _cc and V _dcn pass through the device 30 which synchronously _cuts off one or more pulse width adjustment signals, a new trigger level control signal V _etcn can be generated, and its waveform is as shown in FIG.

The synchronous cut-off trigger control signal V _etcn and the signal of the sawtooth wave generator having the same period positive slope pass through the second comparator 32 of the device 30 with the synchronous cutoff of one or a plurality of pulse width adjustment signals, and the design will be new The trigger level control signal V _{etcn is} connected to the inverting input terminal of the second comparator 32, and the signal of the sawtooth wave generator having the same period positive slope is connected to the non-inverting input terminal of the second comparator 32, any new one. The trigger level control signal _Vetcn must be initially greater than the signal of the sawtooth generator with the positive slope of the same period, so the second comparator 32 outputs a low voltage signal of 0 volts, when the same period positive slope of the sawtooth generator When the signal rises above the new trigger level control signal _Vetcn , the second comparator 32 outputs a high voltage signal _Vcc , until the next positive slope of the sawtooth generator, repeating the same action, and the result can be An output signal O/P ₁ . . . O/P _n having a starting point that is not necessarily simultaneous but having a synchronous cutoff and maintaining the original pulse width is generated as shown in FIGS. 12 and 13. The width of the pulse wave is: V _cc = 5 volts in the formula

△T _onn /T=V _dcn /V _cc = α _n = task period of the nth signal = on time/cycle of the nth signal...... (16)

The output signals O/P ₁ ... O/P _n pass through a typical second phase lock loop 40 for feedback compensation and adjustment, and one or a set of signals PWM ₁ and PWM ₂ with synchronous trigger but different pulse width adjustments can be obtained. , ... PWM _n , its output is shown in Figure 14, and output to the output.

1‧‧‧A single or multiple signals of the same period but with different pulse widths can be adjusted to a unit with synchronous trigger/cutoff signal

2‧‧‧Selector

10‧‧‧Devices with simultaneous triggering of one or a plurality of pulse width adjustment signals

11‧‧‧First DC average voltage converter

12‧‧‧First subtractor

13‧‧‧First comparator

14‧‧‧First time base signal detection generator

15‧‧‧Same-cycle and negative-slope sawtooth generator

20‧‧‧First phase locked loop

30‧‧‧Devices with synchronous cutoff of one or more pulse width adjustment signals

31‧‧‧Second DC average voltage converter

32‧‧‧Second comparator

33‧‧‧Second time base signal detection generator

34‧‧‧Single-cycle and positive-slope sawtooth generator

40‧‧‧Second phase locked loop

Figure 1 Conventional pulse width adjustment signal

Figure 2 More than two pulse width adjustment signals

Figure 3 can adjust one or more signals of the same period but with different pulse widths to a device with synchronous trigger/cutoff signal

Figure 4: Device for simultaneously triggering one or a plurality of pulse width adjustment signals

Figure 5. Waveform relationship between I/P ₁ ... I/P _n and V _dc1 ... V _dcn

Figure 6 Sawtooth wave with the negative slope of the same period as the original signal

Figure 7. New trigger level control signal V _tcn

FIG synchronization signal with the original eight cycles triggered and the remains of the original pulse width of the output signal _{O / P 1 ... O / P} n

Figure 9. Signals PWM ₁ , PWM ₂ , ... PWM _n with synchronous trigger but different pulse width adjustment

Figure 10: Device with synchronous cutoff of one or a plurality of pulse width adjustment signals

Figure 11. Sawtooth wave with positive slope of the same period as the original signal

Figure 12. New trigger level control signal V _etcn

Figure 13 shows the output signal O/P ₁ ... O/P _{n which is} off-synchronized with the same period of the original signal and maintains the original pulse width.

Figure 14 Signals PWM ₁ , PWM ₂ , ... PWM _n with synchronous cutoff but different pulse width adjustment

1‧‧‧A single or multiple signals of the same period but with different pulse widths can be adjusted to a unit with synchronous trigger/cutoff signal

2‧‧‧Selector

10‧‧‧Devices with simultaneous triggering of one or a plurality of pulse width adjustment signals

30‧‧‧Devices with synchronous cutoff of one or more pulse width adjustment signals

Claims (4)

A device for synchronously triggering one or a plurality of pulse width adjustment signals, comprising: a first DC average voltage converter, one or a plurality of pulse width adjustment signals I/P of the same period but different pulse widths ₁ ... I / P _n , after conversion, will obtain individual DC average voltage, output to the first subtractor; the first subtractor, can generate a new trigger level control signal, output to the first comparator; a first time base signal detection generator capable of generating a square wave synchronized with the original signal (α = task period = on time / period = 50%), and outputting to a sawtooth wave generator having the same period and a negative slope; The same period and negative slope sawtooth generator outputs a negative slope sawtooth wave of the same period as the original signal to the first comparator; the first comparator generates a synchronous trigger with the same period as the original signal and maintains the original pulse width The output signal O/P ₁ ... O/P _{n is} output to the first phase locked loop; a first output terminal has a plurality of output terminals; the first phase locked loop can generate one or more of the synchronous triggers but different pulse Width adjusting signals _{PWM 1, PWM 2, ... PWM} n output to the output terminal of which one of the plurality. A method for synchronously triggering one or a plurality of pulse width adjustment signals, comprising: inputting one or a plurality of pulse width adjustment signals -I/P ₁ ... I/P _n of the same period but having different pulse widths to After the first DC average voltage converter, the individual DC average voltages V _dcn , V _cc (V _cc = 5 volts) and V _{dcn are} passed through the first subtractor, and a new trigger level control signal V can be generated. _Tcn ; I / P ₁ ... I / P _n signal, while the first time base signal detection generator can generate a square wave synchronized with the original signal (α = task cycle = on time / cycle = 50%), and then After the same period and negative slope sawtooth generator, a sawtooth wave with a negative slope of the same period as the original signal can be generated; a new trigger level control signal V _tcn and a sawtooth wave generator having the same period negative slope as the original signal The signal, after passing through the first comparator, generates an output signal O/P ₁ ... O/P _n having the same period of synchronization with the original signal and maintaining the original pulse width; the output signal O/P ₁ ... O/P _n passes Typical first phase locked loop for feedback compensation and adjustment, It is possible to obtain one or a plurality of signals PWM ₁ , PWM ₂ , ... PWM _n having synchronous triggers but different pulse width adjustment outputs to the output. A device for synchronously cutting off one or more pulse width adjustment signals, comprising: a second DC average voltage converter, one or a plurality of pulse width adjustment signals I/P _{1 of the} same period but having different pulse widths ...I/P _n , after conversion, an individual DC average voltage can be obtained and output to a second subtractor; the second subtractor can generate a new trigger level control signal, which can be output to the second comparator; a second time base signal detection generator capable of generating a square wave synchronized with the original signal (α=task cycle=on time/cycle=50%), and outputting to the same period and positive slope sawtooth generator; The same period and positive slope sawtooth generator outputs a positive slope sawtooth wave of the same period as the original signal to the second comparator; the second comparator generates a synchronous trigger with the same period as the original signal and maintains the original pulse width output signal _{O / P 1 ... O / P} n, output to the second phase locked loop; a second output terminal, having a plurality of output terminals; the second phase locked loop may generate one or a plurality of synchronous triggering but having different Wave width adjustment signals _{PWM 1, PWM 2, ... PWM} n output to the output terminal of which one of the plurality. A synchronous off one or a plurality of pulse width adjustment signal process tools, comprising: one or a plurality of the same period but different pulse width of the pulse width adjustment signal _{I / P 1 ... I / P} n, input to the DC After the average voltage converter, individual DC average voltages V _dcn , V _cc (V _cc = 5 volts) and V _{dcn are obtained} , and a new trigger level control signal V _etcn can be generated; I/P ₁ ... I/P The signal of _n , through the time base signal detection generator, can generate a square wave synchronized with the original signal (α = task period = on time / period = 50%), and then pass through the same period and positive slope sawtooth generator, A sawtooth wave that produces a positive slope of the same period as the original signal; a new trigger level control signal _Vetcn and a sawtooth generator having the same positive slope as the original signal, after the comparator, produces the original signal Output signal O/P ₁ ... O/P _n with the same period of synchronization and maintaining the original pulse width; output signal O/P ₁ ... O / P _n through the typical phase lock loop, feedback compensation and adjustment, can Get one or more of them with a synchronization cutoff Different pulse width modulation signal _{PWM 1, PWM 2, ... PWM} n to the output terminal.