CN204145442U - Positive and negative power supply synchronously powers on scheme circuitry - Google Patents
Positive and negative power supply synchronously powers on scheme circuitry Download PDFInfo
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- CN204145442U CN204145442U CN201420653665.8U CN201420653665U CN204145442U CN 204145442 U CN204145442 U CN 204145442U CN 201420653665 U CN201420653665 U CN 201420653665U CN 204145442 U CN204145442 U CN 204145442U
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Abstract
The utility model provides a kind of positive and negative power supply synchronously to power on scheme circuitry, comprising: the first DC power supply DC1, the second DC power supply DC2, the first resistance R1, the second resistance R2, voltage stabilizing didoe D1, NPN triode NPN, PNP triode PNP, the first load LOAD1, the second load LOAD2.Its advantage is the electric power thus supplied detecting positive and negative two current supply circuits in real time; when powering on; can wait for that positive and negative power supply has been set up simultaneously and just export power supply; if there have that riches all the way at normal operation to be raw because the Voltage Drop of overload or short-term reason also can close two in time export power supply, follow-up load circuit is protected phase shortage to power.
Description
Technical field
The utility model relates to a kind of positive and negative power supply and synchronously to power on scheme circuitry.
Background technology
Many applications such as operational amplifier all need the positive and negative supply power voltage of multichannel to set up power supply simultaneously, and guarantee system can normally work.When settling time of powering is inconsistent, follow-up load equipment may the operating state of parameter error, and have when current supply circuit in the middle of a road power generation open circuit time, follow-up load equipment circuit may produce fault or even accident.
And traditional solution to be each road all arranged that voltage monitor monitors and be aggregated into processor reports to the police, although this method can monitor electric voltage exception, complicated integral structure, response speed is slow, to realize the mechanism that synchronously powers on, also to add electronic switch, increasing cost and complexity.
Utility model content
The utility model provides a kind of positive and negative power supply synchronously to power on scheme circuitry, to overcome the defect of above-mentioned prior art.
The utility model provides a kind of positive and negative power supply synchronously to power on scheme circuitry, comprising: the first DC power supply DC1, the second DC power supply DC2, the first resistance R1, the second resistance R2, voltage stabilizing didoe D1, NPN triode NPN, PNP triode PNP, the first load LOAD1, the second load LOAD2; The negative pole of the first DC power supply DC1 is connected with the positive pole of the second DC power supply DC2; One end of first resistance R1 is connected with the positive pole of the first DC power supply DC1, and the other end is connected with the negative pole of voltage stabilizing didoe D1; One end of second resistance R2 is connected with the negative pole of the second DC power supply DC2, and the other end is connected with the positive pole of voltage stabilizing didoe D1; The base stage of PNP triode PNP is connected with the negative pole of voltage stabilizing didoe D1, and emitting stage is connected with the positive pole of the first DC power supply DC1, and collector electrode is connected with first load LOAD1 one end; The base stage of NPN triode NPN is connected with the positive pole of voltage stabilizing didoe D1, and emitting stage is connected with the negative pole of the second DC power supply DC2, and collector electrode is connected with second load LOAD2 one end; First load LOAD1 one end is connected with the collector electrode of PNP triode PNP, and the other end is connected with the second load LOAD2; Second load LOAD2 one end is connected with the collector electrode of NPN triode NPN, and the other end is connected with the second load LOAD2; The negative pole of the first DC power supply DC1 also with, the first load LOAD1 is connected with the junction of the second load LOAD2.
Further, the utility model provides a kind of positive and negative power supply synchronously to power on scheme circuitry, can also have such feature: also comprise the 3rd resistance R3 and the 4th resistance R4; 3rd resistance R2 accesses the junction of the base stage of PNP triode PNP and the negative pole of voltage stabilizing didoe D1; 4th resistance R4 accesses the junction of the base stage of NPN triode NPN and the positive pole of voltage stabilizing didoe D1.
The beneficial effect of utility model
Synchronously to power on scheme circuitry according to the positive and negative power supply of one provided by the utility model; considerably less element is used to be exactly the electric power thus supplied detecting positive and negative two current supply circuits in real time; when powering on; can wait for that positive and negative power supply has been set up simultaneously and just export power supply; if there have that riches all the way at normal operation to be raw because the Voltage Drop of overload or short-term reason also can close two in time export power supply, follow-up load circuit is protected phase shortage to power.And positive and negative power supply synchronously powers on the low cost of scheme circuitry, the design of simplifying and response speed at a high speed.
Accompanying drawing explanation
Fig. 1 is that positive and negative power supply synchronously powers on scheme circuitry figure.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Fig. 1 is that positive and negative power supply synchronously powers on scheme circuitry figure.
As shown in Figure 1, the first DC power supply DC1, the second DC power supply DC2, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, voltage stabilizing didoe D1, NPN triode NPN, PNP triode PNP, the first load LOAD1, the second load LOAD2;
The negative pole of the first DC power supply DC1 is connected with the positive pole of the second DC power supply DC2.One end of first resistance R1 is connected with the positive pole of the first DC power supply DC1, and the other end is connected with the negative pole of voltage stabilizing didoe D1.One end of second resistance R2 is connected with the negative pole of the second DC power supply DC2, and the other end is connected with the positive pole of voltage stabilizing didoe D1.
The base stage of PNP triode PNP is connected with the negative pole of voltage stabilizing didoe D1, and emitting stage is connected with the positive pole of the first DC power supply DC1, and collector electrode is connected with first load LOAD1 one end.
The base stage of NPN triode NPN is connected with the positive pole of voltage stabilizing didoe D1, and emitting stage is connected with the negative pole of the second DC power supply DC2, and collector electrode is connected with second load LOAD2 one end.
First load LOAD1 one end is connected with the collector electrode of PNP triode PNP, and the other end is connected with the second load LOAD2.Second load LOAD2 one end is connected with the collector electrode of NPN triode NPN, and the other end is connected with the second load LOAD2.The negative pole of the first DC power supply DC1 also with, the first load LOAD1 is connected with the junction of the second load LOAD2.
3rd resistance R2 accesses the junction of the base stage of PNP triode PNP and the negative pole of voltage stabilizing didoe D1.4th resistance R4 accesses the junction of the base stage of NPN triode NPN and the positive pole of voltage stabilizing didoe D1.
Positive and negative power supply synchronously powers on scheme circuitry operation principle:
Synchronously the power on voltage of voltage regulation value of voltage stabilizing didoe of scheme circuitry of positive and negative power supply requires both to be greater than the magnitude of voltage in any individual event single supply loop, i.e. VD1 > DC1 and VD1 > DC2; Be less than again two electric power loop magnitudes of voltage simultaneously and, and VD < DC1+DC2.The pressure drop that when DC1 and DC2 normal power supply, it produces on R1 and R2 at least ensures that the Vbe being greater than NPN triode and PNP triode ties forward voltage drop, and namely two resistance drops ensure to make the work of two BJT triode ON.
When circuit working: suppose to only have DC1 to have voltage, DC2=OV is then because DC1 < VD1, voltage stabilizing didoe is in anti-phase cut-off state, leakage current is minimum, the pressure drop that R1 produces is also minimum, now VR1 < Vbe, PNP triode is in cut-off state not conducting.Exporting two-way does not all have voltage contrary, suppose to only have DC2 to have voltage, DC1=OV is then because DC2 < VD1, voltage stabilizing didoe is in anti-phase cut-off state, leakage current is minimum, the pressure drop that R2 produces is also minimum, and now VR2 < Vbe, NPN triode is in cut-off state also not conducting.Export two-way and also all there is no voltage.
When two-way voltage has all been set up, namely positive and negative power supply all normal after because DC1+DC2 > VD1, voltage stabilizing didoe is operated in and anti-phasely punctures voltage stabilizing district, make R1 and R2 have certain circuit to pass through, and the pressure drop that R1 and R2 produces make two triode all conductings.Export two-way all as load normal power supply.And because electric current settling time of R1 with R2 is consistent, the time of triode ON is also consistent, then it is also consistent for exporting the time that power supply sets up, for the situation that there is not disconnected item follow-up power supply and power.If need to monitor output voltage, then monitor any road power can determine positive and negative two power supply situations.
Positive and negative power supply synchronously powers on scheme circuitry, and consider the restriction to transistor base electric current, circuit adds resistance R3 and R4.
Claims (2)
1. positive and negative power supply synchronously powers on scheme circuitry, it is characterized in that comprising: the first DC power supply (DC1), the second DC power supply (DC2), the first resistance (R1), the second resistance (R2), voltage stabilizing didoe (D1), NPN triode (NPN), PNP triode (PNP), the first load (LOAD1), the second load (LOAD2);
The negative pole of the first DC power supply (DC1) is connected with the positive pole of the second DC power supply (DC2);
One end of first resistance (R1) is connected with the positive pole of the first DC power supply (DC1), and the other end is connected with the negative pole of voltage stabilizing didoe (D1);
One end of second resistance (R2) is connected with the negative pole of the second DC power supply (DC2), and the other end is connected with the positive pole of voltage stabilizing didoe (D1);
The base stage of PNP triode (PNP) is connected with the negative pole of voltage stabilizing didoe (D1), and emitting stage is connected with the positive pole of the first DC power supply (DC1), and collector electrode is connected with the first load (LOAD1) one end;
The base stage of NPN triode (NPN) is connected with the positive pole of voltage stabilizing didoe (D1), and emitting stage is connected with the negative pole of the second DC power supply (DC2), and collector electrode is connected with the second load (LOAD2) one end;
First load (LOAD1) one end is connected with the collector electrode of PNP triode (PNP), and the other end is connected with the second load (LOAD2);
Second load (LOAD2) one end is connected with the collector electrode of NPN triode (NPN), and the other end is connected with the second load (LOAD2);
The negative pole of the first DC power supply (DC1) also with, the first load (LOAD1) is connected with the junction of the second load (LOAD2).
2. positive and negative power supply according to claim 1 synchronously powers on scheme circuitry, it is characterized in that:
Also comprise the 3rd resistance (R3) and the 4th resistance (R4);
3rd resistance (R3) accesses the junction of the base stage of PNP triode (PNP) and the negative pole of voltage stabilizing didoe (D1);
4th resistance (R4) accesses the junction of the base stage of NPN triode (NPN) and the positive pole of voltage stabilizing didoe (D1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420653665.8U CN204145442U (en) | 2014-11-04 | 2014-11-04 | Positive and negative power supply synchronously powers on scheme circuitry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420653665.8U CN204145442U (en) | 2014-11-04 | 2014-11-04 | Positive and negative power supply synchronously powers on scheme circuitry |
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| Publication Number | Publication Date |
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| CN204145442U true CN204145442U (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420653665.8U Active CN204145442U (en) | 2014-11-04 | 2014-11-04 | Positive and negative power supply synchronously powers on scheme circuitry |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109286309A (en) * | 2018-08-31 | 2019-01-29 | 北京雪迪龙科技股份有限公司 | A kind of single channel power input multichannel positive-negative power output circuit |
| CN112858945A (en) * | 2021-01-26 | 2021-05-28 | 重庆市龙门浩职业中学校 | Positive and negative power supply detection device |
-
2014
- 2014-11-04 CN CN201420653665.8U patent/CN204145442U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109286309A (en) * | 2018-08-31 | 2019-01-29 | 北京雪迪龙科技股份有限公司 | A kind of single channel power input multichannel positive-negative power output circuit |
| CN112858945A (en) * | 2021-01-26 | 2021-05-28 | 重庆市龙门浩职业中学校 | Positive and negative power supply detection device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |