CN202383547U - Linear power module with small ripple wave - Google Patents
Linear power module with small ripple wave Download PDFInfo
- Publication number
- CN202383547U CN202383547U CN2011205296899U CN201120529689U CN202383547U CN 202383547 U CN202383547 U CN 202383547U CN 2011205296899 U CN2011205296899 U CN 2011205296899U CN 201120529689 U CN201120529689 U CN 201120529689U CN 202383547 U CN202383547 U CN 202383547U
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- circuit
- power supply
- linear power
- resistance
- output
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Abstract
The utility model belongs to the linear power field, and relates to a linear power module with small ripple wave. A comparison amplifying circuit 2 of the power module is an operation amplifier U1, a sampling circuit 4 comprises a resistor R1 and a resistor R2, the resistor R2 is a selectable voltage-division resistor and comprises a potentiometer and a fixed resistance voltage division, the resistor R2 voltage dividing output is electrically connected with an inverted input end of the operation amplifier through a resistor R3, the output of a reference circuit 3 is electrically connected with a non-inverting input end of the operation amplifier U1 through a resistor R4, a power source of the operation amplifier U1 is supplied by a voltage stabilizing circuit output by an input filter, and the output end of the operation amplifier U1 is electrically connected with a control end of an adjusting circuit 1.
Description
Technical field
The utility model belongs to the linear power supply field, relates to the little linear power supply module of a kind of ripple.
Background technology
The electronic equipment receiver is higher to power requirement; Precision is high; Stable and reliable for performance, ripple is little, and the employed linear power supply of electronic equipment was because the instability of reference voltage and the poor quality of sample circuit in the past; Cause whole power supply output ripple big, be difficult to obtain desirable resolution with respect to the Testing of Feeble Signals circuit of having relatively high expectations.
Summary of the invention
It is high that the purpose of the utility model provides a kind of precision, stable and reliable for performance, the linear power supply module that ripple is little.
The purpose of the utility model is to realize like this; The linear power supply module that a kind of ripple is little; Which comprises at least adjustment circuit 1, relatively amplifying circuit 2, reference circuit 3, sample circuit 4 and input filtering 5 and output filtering 6, by adjustment circuit 1, relatively amplifying circuit 2, reference circuit 3, sample circuit 4 and input filtering 5 and output filtering 6 constitute the linear power supply of standard, be encapsulated in the housing; The linear power supply input end has the high and low frequency filter capacitor that is made up of C1, C2; The linear power supply output terminal has the high and low frequency filter capacitor that is made up of C3, C4, it is characterized in that: relatively amplifying circuit 2 is operational amplifier U1, and sample circuit 4 comprises resistance R 1 and R2; Resistance R 2 is for can select dividing potential drop type resistance; Comprise potentiometer and fixed resistance dividing potential drop, the output of resistance R 2 dividing potential drops is electrically connected with the inverting input of operational amplifier through resistance R 3, and reference circuit 3 outputs are electrically connected with the in-phase input end of operational amplifier U1 through resistance R 4; The power supply of operational amplifier U1 is to be provided by the mu balanced circuit after the input filtering output, and operational amplifier U1 output terminal is electrically connected with the control end of adjustment circuit 1.
Reference circuit 3 adopts zinc-mercuric oxide cell.
Relatively amplifying circuit 2 adopts operational amplifier U1.
Adjustment circuit 1 is the NPN large power triode.
Large power triode is the Darlington complex pipe.
The sample resistance of sample circuit 4 is manganese-copper filament coilings of low-temperature coefficient, or adopts the little precision metallic film resistance of temperature coefficient.
The utility model has the advantages that: adopt operational amplifier U1 that the ac ripple signal of load voltage is amplified, regulate by adjustment circuit T1 again, reduce the output ripple of D.C. regulated power supply.Reference circuit 3 adopts zinc-mercuric oxide cell, zinc-mercuric oxide cell output voltage noiseless, and internal resistance is little, and temperature coefficient is little.Adopt zinc-mercuric oxide cell benchmark and operational amplifier U1 to amplify ripple, and then through excessive dynamic triode close loop negative feedback adjustment, output voltage ripple reduce greatly.
Description of drawings
Fig. 1 is the utility model embodiment circuit theory diagrams.
Among the figure, 1, the adjustment circuit; 2, compare amplifying circuit; 3, reference circuit; 4, sample circuit; 5, input filter capacitor; 6, output filter capacitor; 7, rectification circuit.
Embodiment
The linear power supply module that a kind of ripple is little; Which comprises at least adjustment circuit 1, compare amplifying circuit 2, reference circuit 3, sample circuit 4 and input filter capacitor 5 and output filter capacitor 6; Rectification circuit 7 carries out alternating voltage to carry out filtering by input filter capacitor 5 after the rectification; The output of adjustment circuit 1 is again by output filter capacitor 6 filtering, and mu balanced circuit is encapsulated in the housing by adjustment circuit 1, relatively amplifying circuit 2, reference circuit 3, sample circuit 4 and input filtering 5 and output filtering 6 constitute the linear power supply of standard; The linear power supply input end has the high and low frequency filter capacitor that is made up of C1, C2; The linear power supply output terminal has the high and low frequency filter capacitor that is made up of C3, C4, it is characterized in that: relatively amplifying circuit 2 is operational amplifier U1, and sample circuit 4 comprises resistance R 1 and R2; Resistance R 2 is for can select dividing potential drop type resistance; Comprise potentiometer and fixed resistance dividing potential drop, the output of resistance R 2 dividing potential drops is electrically connected with the inverting input of operational amplifier through resistance R 3, and reference circuit 3 outputs are electrically connected with the in-phase input end of operational amplifier U1 through resistance R 4; The power supply of operational amplifier U1 is to be provided by the mu balanced circuit after the input filtering output, and operational amplifier U1 output terminal is electrically connected with the control end of adjustment circuit 1.
Reference circuit 3 adopts zinc-mercuric oxide cell, zinc-mercuric oxide cell output voltage noiseless, and internal resistance is little, and temperature coefficient is little.Because zinc-mercuric oxide cell is to be anode with the granular zinc of high-purity, mercuric chloride is the battery of negative electrode, and its electrolyte is a NaOH, because the electrolytic solution conductance is high, so internal resistance is little.Temperature coefficient can accomplish when normal temperature≤5 * 10
-6/ ℃.
Relatively amplifying circuit 2 adopts operational amplifier U1, and operational amplifier U1 is that low-power consumption type, open-loop gain are big, to increase the ability of control adjustment pipe.The noise that amplifier produced, drift is humble, to prevent influencing the stability of voltage to this undesired signal output terminal that is added to.
Adjustment circuit 1 is NPN large power triode T1; Like homemade type is the triode or the Darlington complex pipe of 3DD series; Triode adjustment electric current should leave certain leeway in selection, this not only will consider stabilized voltage supply ability operate as normal when load current is big, but also it should be noted that domestic maximum power dissipation of the transis index has than big difference when using with reality; Controlled stage generally adopts the Darlington complex pipe now, can also improve the impedance and the mutual conductance of adjustment level like this.
The form that sample circuit 4 sample circuits are commonly used is a bleeder circuit, and its dividing potential drop coefficient N stablizes as much as possible greatly within the bounds of possibility, maximum N=1, and this will help improving degree of stability.This is because after the sampling value increase, through relatively amplifying, the ability that the control adjustment is managed also will strengthen, thereby degree of stability is improved.Its sample resistance is used high stability usually, the manganese-copper filament coiling of low-temperature coefficient, or adopt the little precision metallic film resistance of temperature coefficient.
Adopt operational amplifier U1 that the ac ripple signal of load voltage is amplified, regulate by adjustment circuit T1 again, reduce the output ripple of D.C. regulated power supply.Reference circuit 3 adopts zinc-mercuric oxide cell, zinc-mercuric oxide cell output voltage noiseless, and internal resistance is little, and temperature coefficient is little.Adopt zinc-mercuric oxide cell benchmark and operational amplifier U1 to amplify ripple, and then through excessive dynamic triode close loop negative feedback adjustment, output voltage ripple reduce greatly.
The low pressure differential power integration module is adopted in this power module circuitry design, and benchmark, comparison, amplification, driving etc. are integrated in one, and has simplified power-supply wiring greatly, has reduced solder joint, has improved reliability; Particularly this device pressure reduction only about 0.7V, greatly reduces the power tube power consumption, has improved power work efficient.Because power consumption is little, it is few to generate heat, and burns device like this with regard to having avoided local overheating, causes power-fail, thereby has realized power module reliable and stable work in wider temperature range.
Claims (6)
1. linear power supply module that ripple is little; Which comprises at least adjustment circuit (1), relatively amplifying circuit (2), reference circuit (3), sample circuit (4) and input filtering (5) and output filtering (6); By adjustment circuit (1), relatively amplifying circuit (2), reference circuit (3), sample circuit (4) and input filtering (5) and the linear power supply of exporting filtering (6) formation standard; Be encapsulated in the housing, the linear power supply input end has the high and low frequency filter capacitor that is made up of C1, C2, and the linear power supply output terminal has the high and low frequency filter capacitor that is made up of C3, C4; It is characterized in that: relatively amplifying circuit (2) is operational amplifier U1; Sample circuit (4) comprises resistance R 1 and R2, and resistance R 2 comprises potentiometer and fixed resistance dividing potential drop for can select dividing potential drop type resistance; The output of resistance R 2 dividing potential drops is electrically connected with the inverting input of operational amplifier through resistance R 3; Reference circuit (3) output is electrically connected with the in-phase input end of operational amplifier U1 through resistance R 4, and the power supply of operational amplifier U1 is to be provided by the mu balanced circuit after the input filtering output, and operational amplifier U1 output terminal is electrically connected with the control end of adjustment circuit (1).
2. the little linear power supply module of a kind of ripple according to claim 1 is characterized in that: reference circuit (3) adopts zinc-mercuric oxide cell.
3. the little linear power supply module of a kind of ripple according to claim 1 is characterized in that: relatively amplifying circuit (2) adopts operational amplifier U1.
4. the little linear power supply module of a kind of ripple according to claim 1 is characterized in that: adjustment circuit (1) is the NPN large power triode.
5. the little linear power supply module of a kind of ripple according to claim 4 is characterized in that: large power triode is the Darlington complex pipe.
6. the little linear power supply module of a kind of ripple according to claim 1 is characterized in that: the sample resistance of sample circuit (4) is the manganese-copper filament coiling of low-temperature coefficient, or adopts the little precision metallic film resistance of temperature coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205296899U CN202383547U (en) | 2011-12-18 | 2011-12-18 | Linear power module with small ripple wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205296899U CN202383547U (en) | 2011-12-18 | 2011-12-18 | Linear power module with small ripple wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202383547U true CN202383547U (en) | 2012-08-15 |
Family
ID=46632039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205296899U Expired - Lifetime CN202383547U (en) | 2011-12-18 | 2011-12-18 | Linear power module with small ripple wave |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202383547U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133513A (en) * | 2013-05-03 | 2014-11-05 | 深圳市海洋王照明工程有限公司 | Voltage stabilizing circuit |
| CN104977959A (en) * | 2015-07-03 | 2015-10-14 | 金龙联合汽车工业（苏州）有限公司 | Lithium battery charging and discharging ripple filtering circuit |
-
2011
- 2011-12-18 CN CN2011205296899U patent/CN202383547U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133513A (en) * | 2013-05-03 | 2014-11-05 | 深圳市海洋王照明工程有限公司 | Voltage stabilizing circuit |
| CN104133513B (en) * | 2013-05-03 | 2016-04-27 | 深圳市海洋王照明工程有限公司 | A kind of mu balanced circuit |
| CN104977959A (en) * | 2015-07-03 | 2015-10-14 | 金龙联合汽车工业（苏州）有限公司 | Lithium battery charging and discharging ripple filtering circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120815 |