CN103869856B - A kind of multivoltage sequential control circuit - Google Patents
A kind of multivoltage sequential control circuit Download PDFInfo
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- CN103869856B CN103869856B CN201210531432.6A CN201210531432A CN103869856B CN 103869856 B CN103869856 B CN 103869856B CN 201210531432 A CN201210531432 A CN 201210531432A CN 103869856 B CN103869856 B CN 103869856B
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Abstract
The invention provides a kind of multivoltage sequential control circuit, this circuit comprises N number of univoltage control circuit and N number of voltage VCC output circuit, wherein, the enable input end of the 1st univoltage control circuit is connected with supply voltage, and the output terminal of the 1st univoltage control circuit is connected to the enable input end of voltage VCC1 output circuit; The enable input end of the i-th univoltage control circuit is connected with the output terminal of voltage VCC (i-1) output circuit, the output terminal of the i-th univoltage control circuit is connected to the enable input end of voltage VCC (i) output circuit, 1 < i < N+1, i is integer.Present invention reduces the complexity of multivoltage sequential control.
Description
Technical field
The present invention relates to multivoltage sequential control field, particularly relate to a kind of multivoltage sequential control circuit.
Background technology
Along with the development of semiconductor technology, the complicated integrated circuit be made up of large-scale exchange chip, cpu chip etc. or system, generally can claim to the power supply timing of power supply, and namely user needs the voltage of the different magnitude of voltage of time ordered pair according to regulation to power on.Existing multivoltage sequential control circuit often needs timer and multiple univoltage control circuit, and each univoltage control circuit is for controlling the power-on time of a univoltage, and timer is for controlling the work schedule of multiple univoltage control circuit.Each univoltage control circuit, comprises again the devices such as many comparers, resistance, electric capacity.The design that such multivoltage sequential control circuit comprises is complicated.
Along with circuit is to the raising of power supply timing requirements, except requiring to ensure voltage electric sequence, also electricity order is gone to propose requirement to voltage, this turn increases circuit complexity undoubtedly, cause and realize the voltage electric sequential control circuit that gets on and take circuit board space and become large, run counter to the plant networki of existing product miniaturization, simplification, low cost.
Summary of the invention
The invention provides a kind of multivoltage sequential control circuit, to solve the technical matters how realizing reducing multivoltage sequential control complexity.
For solving the problems of the technologies described above, the invention provides a kind of multivoltage sequential control circuit, described circuit comprises N number of univoltage control circuit and N number of voltage VCC output circuit, wherein,
The enable input end of the 1st univoltage control circuit is connected with supply voltage, and the output terminal of the 1st univoltage control circuit is connected to the enable input end of voltage VCC1 output circuit;
The enable input end of the i-th univoltage control circuit is connected with the output terminal of voltage VCC (i-1) output circuit, the output terminal of the i-th univoltage control circuit is connected to the enable input end of voltage VCC (i) output circuit, 1 < i < N+1, i is integer.
Further, described i-th univoltage control circuit comprises a comparer, an on-off circuit and a resistance circuit, wherein,
The signal that described comparer will export through voltage VCC (i-1) output circuit and the reference voltage preset are as input signal, wherein, one end that the signal exported through voltage VCC (i-1) output circuit inputs described comparer is described enable input end;
The output terminal of described comparer is connected with the input end of on-off circuit;
The output terminal of described on-off circuit is through resistance circuit ground connection;
The positive voltage output end of described resistance circuit is connected with the enable input end of voltage VCC (i) output circuit.
Further,
Described on-off circuit comprises triode;
The output terminal of described comparer is connected with the base stage of triode;
In two other electrode of described triode, an electrode is connected with supply voltage, and another electrode is through resistance circuit ground connection.
Further,
Described resistance circuit is bleeder circuit, and the positive voltage output end of described resistance circuit is a dividing point of bleeder circuit.
Further,
Along with the increase gradually of i, described dividing point reduces gradually to the resistance on ground and the ratio of all-in resistance of bleeder circuit.
Further,
Described bleeder circuit is composed in series by resistance R [2 (i-1)-1] and R [2 (i-1)];
The voltage of dividing point is the voltage at resistance R [2 (i-1)] two ends;
Along with the increase gradually of i, R [2 (i-1)]/(R [2 (i-1)-1]+R [2 (i-1)]) reduces gradually.
Technique scheme is from the 2nd univoltage control circuit, and its enable signal is the voltage that last sequential produces, and saves timer; In technique scheme, each univoltage control circuit is only made up of the simple resolution element of minority in addition, simplifies the design of voltage sequential control circuit.
Accompanying drawing explanation
Fig. 1 is the multivoltage sequential control circuit schematic diagram of the present embodiment;
Fig. 2-1 is the voltage electrifying timing sequence figure of the present embodiment;
Fig. 2-2 is that the voltage of the present embodiment removes electric sequential chart;
Fig. 3 is the multivoltage sequential control circuit schematic diagram of this application example;
Fig. 4-1 be this application example actual measurement on electrical waveform schematic diagram;
Fig. 4-2 is that electrical waveform schematic diagram is removed in the actual measurement of this application example.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.
Fig. 1 is the multivoltage sequential control circuit schematic diagram of the present embodiment.
This circuit comprises N number of univoltage control circuit, is the 1st univoltage control circuit, the 2nd univoltage control circuit, the 3rd univoltage control circuit ..., N univoltage control circuit respectively; And N number of voltage VCC output circuit; N=3 in the present embodiment; Wherein,
The enable input end of the 1st univoltage control circuit is connected with supply voltage VCC, and the output terminal of the 1st univoltage control circuit is connected to the enable input end of voltage VCC1 output circuit;
The enable input end of the i-th univoltage control circuit is connected with the output terminal of voltage VCC (i-1) output circuit, the output terminal of the i-th univoltage control circuit is connected to the enable input end of voltage VCC (i) output circuit, 1 < i < N+1, i is integer.The voltage sequential powered on through above-mentioned multivoltage sequential control circuit is as shown in Fig. 2-1.
Above-described embodiment hinge structure eliminates timer, simplifies sequential control circuit.
In above-described embodiment, the i-th univoltage control circuit can comprise a comparer, an on-off circuit and a resistance circuit, wherein,
The signal that described comparer will export through voltage VCC (i-1) output circuit and the reference voltage preset are as input signal, wherein, one end that the signal exported through voltage VCC (i-1) output circuit inputs described comparer is described enable input end; Described reference voltage is determined according to the operating voltage of described transistor base and voltage VCC (i-1), to ensure that comparer processes the voltage of rear output within the scope of transistor base operating voltage to voltage VCC (i-1) and reference voltage;
The output terminal of described comparer is connected with the input end of on-off circuit;
The output terminal of described on-off circuit is through resistance circuit ground connection;
The positive voltage output end of described resistance circuit is connected with the enable input end of voltage VCC (i) output circuit.
Said switching circuit can be triode, as NPN pipe, PNP pipe; When on-off circuit is triode, the output terminal of described comparer is connected with the base stage of triode; In two other electrode of described triode, an electrode is connected with supply voltage, and another electrode is through resistance circuit ground connection.
Because univoltage control circuit is made up of simple discrete component, sequential control circuit can be simplified further.
Above-mentioned resistance circuit can be bleeder circuit again, and the positive voltage output end of described resistance circuit is a dividing point of bleeder circuit.
The simplest bleeder circuit is the circuit be composed in series by resistance R [2 (i-1)-1] and R [2 (i-1)], and the voltage of dividing point is the voltage at resistance R [2 (i-1)] two ends.
The voltage exporting the enable input end of voltage VCC (i) output circuit due to the i-th univoltage control circuit to is determined by resistance R [2 (i-1)] and resistance R [2 (i-1)-1], the resistance of resistance R in different univoltage control circuit [2 (i-1)] and resistance R [2 (i-1)-1] can be set, when ensureing supply voltage VCC power-off, the voltage exporting the different enable input ends of voltage VCC (i) output circuit to is different, and then ensures that different VCC (i) output circuits goes the electricity time different.As, when supply voltage VCC power-off, the transient voltage of the enable input end of the 1st univoltage control circuit is VCC; The transient voltage of the enable input end of the 2nd univoltage control circuit is (R2/ (R2+R1)) * (VCC-V), V is the tube voltage drop of triode; The transient voltage of the enable input end of the 3rd univoltage control circuit is (R4/ (R4+R3)) * (VCC-V); The transient voltage of the enable input end of N univoltage control circuit is R [2 (N-1)]/(R [2 (N-1)-1]+R [2 (N-1)]) * (VCC-V);
Electricity is removed for after the voltage that realization first powers on, need to ensure R [2 (N-1)]/(R [2 (N-1)-1]+R [2 (N-1)]) * (VCC-V) < ... < (R4/ (R4+R3)) * (VCC-V) < (R2/ (R2+R1)) * (VCC-V) < VCC, namely ensures R [2 (N-1)]/(R [2 (N-1)-1]+R [2 (N-1)]) < ... < R4/ (R4+R3) < R2/ (R2+R1).Therefore divider resistance in different univoltage control circuit can be set, make the increase gradually along with i, the resistance R [2 (i-1)] be made up of bleeder circuit in the i-th univoltage control circuit/(R [2 (i-1)-1]+R [2 (i-1)]) reduces gradually.Go the voltage sequential of electricity as shown in Fig. 2-2 through above-mentioned multivoltage sequential control circuit.
For other forms of bleeder circuit, as long as ensure along with the increase gradually of i, described dividing point reduces gradually to the ratio of the all-in resistance of the resistance on ground and bleeder circuit, removes electricity after all can realizing the voltage first powered on.
Fig. 3 gives the multivoltage sequential control circuit schematic diagram of a this application example of the present embodiment.In this embodiment, comparer is a NPN triode VT1, its input reference voltage is the forward voltage 0.7V between the base stage of VT1 and collector, R2-4=R3-4=47.5K, R2-5=10K, R3-5=9K, electrical waveform schematic diagram and go electrical waveform schematic diagram respectively as shown in Fig. 4-1 and Fig. 4-2 in the actual measurement that this multivoltage sequential control circuit exports.
The all or part of step that one of ordinary skill in the art will appreciate that in said method is carried out instruction related hardware by program and is completed, and described program can be stored in computer-readable recording medium, as ROM (read-only memory), disk or CD etc.Alternatively, all or part of step of above-described embodiment also can use one or more integrated circuit to realize, and correspondingly, each module/unit in above-described embodiment can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
It should be noted that; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art can make various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the present invention.
Claims (4)
1. a multivoltage sequential control circuit, is characterized in that, described circuit comprises N number of univoltage control circuit and N number of voltage VCC output circuit, wherein,
The enable input end of the 1st univoltage control circuit is connected with supply voltage, and the output terminal of the 1st univoltage control circuit is connected to the enable input end of voltage VCC1 output circuit;
The enable input end of the i-th univoltage control circuit is connected with the output terminal of voltage VCC (i-1) output circuit, the output terminal of the i-th univoltage control circuit is connected to the enable input end of voltage VCC (i) output circuit, 1<i<N+1, i are integer;
Wherein,
I-th univoltage control circuit comprises a resistance circuit, described resistance circuit is bleeder circuit, the positive voltage output end of described resistance circuit is a dividing point of bleeder circuit, and along with the increase gradually of i, described dividing point reduces gradually to the resistance on ground and the ratio of all-in resistance of bleeder circuit;
The positive voltage output end of described resistance circuit is connected with the enable input end of voltage VCC (i) output circuit.
2. circuit as claimed in claim 1, it is characterized in that, described i-th univoltage control circuit also comprises a comparer and an on-off circuit, wherein,
The signal that described comparer will export through voltage VCC (i-1) output circuit and the reference voltage preset are as input signal, wherein, one end that the signal exported through voltage VCC (i-1) output circuit inputs described comparer is described enable input end;
The output terminal of described comparer is connected with the input end of on-off circuit;
The output terminal of described on-off circuit is through resistance circuit ground connection.
3. circuit as claimed in claim 2, it is characterized in that, described circuit comprises further:
Described on-off circuit comprises triode;
The output terminal of described comparer is connected with the base stage of triode;
In two other electrode of described triode, an electrode is connected with supply voltage, and another electrode is through resistance circuit ground connection.
4. circuit as claimed in claim 1, is characterized in that,
Described bleeder circuit is composed in series by resistance R [2 (i-1)-1] and R [2 (i-1)];
The voltage of dividing point is the voltage at resistance R [2 (i-1)] two ends;
Along with the increase gradually of i, R [2 (i-1)]/(R [2 (i-1)-1]+R [2 (i-1)]) reduces gradually.
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| CN201210531432.6A CN103869856B (en) | 2012-12-11 | 2012-12-11 | A kind of multivoltage sequential control circuit |
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| CN201210531432.6A CN103869856B (en) | 2012-12-11 | 2012-12-11 | A kind of multivoltage sequential control circuit |
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| CN103869856A CN103869856A (en) | 2014-06-18 |
| CN103869856B true CN103869856B (en) | 2015-12-23 |
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| CN108536249A (en) * | 2018-05-29 | 2018-09-14 | 河南森源电气股份有限公司 | Controller for electric installation and controller |
| CN109004923A (en) * | 2018-08-28 | 2018-12-14 | 深圳市新国都技术股份有限公司 | Sequential control circuit |
| CN109193599A (en) * | 2018-11-02 | 2019-01-11 | 李振奎 | A kind of ladder cuts unrestrained arc-suppressing method and extinguisher |
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| CN1601412A (en) * | 2003-09-25 | 2005-03-30 | 华为技术有限公司 | Method and circuit for controlling time sequence of power supplying |
| CN101089770A (en) * | 2006-06-15 | 2007-12-19 | 美国芯源系统股份有限公司 | Low dropout linear regulator having high power supply rejection and low quiescent current |
| US7876128B1 (en) * | 2009-04-21 | 2011-01-25 | Hon Hai Precision Industry Co., Ltd. | Voltage sequence output circuit |
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