CN201479112U - Balance output circuit and electronic equipment with same - Google Patents
Balance output circuit and electronic equipment with same Download PDFInfo
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- CN201479112U CN201479112U CN2009201783037U CN200920178303U CN201479112U CN 201479112 U CN201479112 U CN 201479112U CN 2009201783037 U CN2009201783037 U CN 2009201783037U CN 200920178303 U CN200920178303 U CN 200920178303U CN 201479112 U CN201479112 U CN 201479112U
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- branch road
- transistor
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Abstract
The utility model discloses a balance output circuit and electronic equipment with same, relating to the technical field of electronic circuits and being designed for solving the problem that in the prior art, the output of the whole circuit is instable caused by the heat generated by an electronic element in an electronic product. The balance output circuit provided by the utility model comprises a differential amplifying branch circuit, a current-limiting protection branch circuit and a temperature balance branch circuit; and the differential amplifying branch circuit is connected with the temperature balance branch circuit by the current-limiting protection branch circuit. The adoption of the utility model can lead the output signals to be stable.
Description
Technical field
The utility model relates to a kind of electronic circuit, relates in particular to a kind of balanced output circuit and has the electronic equipment of this circuit.
Background technology
Along with continuous progress in science and technology and development, various electronic products enter in the middle of everybody life, become necessary part in everybody life.Wherein, described electronic product is made up of various electronic components.Because described electronic component can produce heat in the process of work, and increases along with the increase of operating time, so just cause himself parameter and changes of properties easily, thereby cause the output instability of entire circuit.Especially, when the cooling measure of described electronic product is relatively poor, be more prone to make the heat stack that each electronic component work in the electronic product produces, make the damage of portion of hot sensitive electronic components, thereby make entire circuit break down.
The utility model content
In order to solve in the prior art since in the electronic product electronic component produce heat, cause the output problem of unstable of entire circuit, the utility model provides a kind of balanced output circuit and has had the electronic equipment of this circuit.
On the one hand, a kind of balanced output circuit of providing of the utility model; This circuit comprises: difference is amplified branch road, current-limiting protection branch road and hygral equilibrium branch road; Described difference is amplified branch road and is linked to each other with described hygral equilibrium branch road by described current-limiting protection branch road.
Further, described difference amplification branch road comprises: first triode, second triode, first resistance, second resistance and the 3rd resistance; Described first transistor base is a signal input part, and described first transistor emitter links to each other with an end of described first resistance, another termination first power supply of described first resistance; Described first transistor collector links to each other with an end of described second resistance, the other end ground connection of described second resistance; Described second transistor emitter links to each other with an end of described first resistance, and described second transistor collector links to each other with an end of described the 3rd resistance, the other end ground connection of described the 3rd resistance; Described second transistor base links to each other with described hygral equilibrium branch road by described current-limiting protection branch road.
Further, described current-limiting protection branch road comprises: current-limiting resistance; Described current-limiting resistance one end links to each other with the base stage of described second triode, and the other end links to each other with described hygral equilibrium branch road.
Further, described hygral equilibrium branch road comprises: the 4th resistance and the 5th resistance; Described the 4th resistance and described the 5th resistance are connected in parallel; One end of described the 4th resistance that is connected in parallel and the 5th resistance links to each other with described current-limiting resistance, and the other end is used for output.
Further, described the 5th resistance resistance that is negative temperature coefficient feature.
Further, described balanced output circuit also comprises: the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 3rd triode, the 4th triode, the 5th triode and first diode;
Described the 6th resistance one end is a signal input part, and the other end links to each other with described the 3rd transistor base;
Described the 7th resistance one end links to each other with described the 3rd transistor base, and the other end links to each other with second source;
Described the 3rd transistor collector links to each other with described the 8th resistance, and described the 8th resistance other end links to each other with described first power supply; Described the 3rd transistor emitter links to each other with described the 9th resistance, described the 9th resistance other end ground connection; Described the 3rd transistor collector also links to each other with the base stage of described first triode, is used for the input signal that described signal input part receives is input to described first triode;
One end of described the tenth resistance links to each other with described first transistor collector, and the other end links to each other with described the 4th transistor base;
Described the 4th transistor emitter links to each other with described first power supply by described the 11 resistance; Described the 4th transistor collector ground connection; Described the 4th transistor emitter links to each other with described the 5th transistor base by described first diode;
Described first diode cathode links to each other with described the 4th transistor emitter, and negative pole is by described the 12 grounding through resistance; Described first diode cathode also links to each other with described the 5th transistor base;
Described the 5th transistor collector is used for signal output, grounded emitter.
Further, described balanced output circuit also comprises: first divider resistance, second divider resistance and the 3rd divider resistance;
Described first divider resistance, one end links to each other with described first power supply, and the other end links to each other with described second divider resistance; The described second divider resistance other end ground connection;
Described the 3rd divider resistance one end links to each other with the non-earth terminal of described second divider resistance, and the other end links to each other with described the 5th transistor collector.
Further, described balanced output circuit also comprises: protective resistance, voltage-stabiliser tube, filter capacitor;
Described protective resistance one end links to each other with the collector electrode of described the 5th triode, and the other end is used for signal output;
Described voltage-stabiliser tube negative pole links to each other plus earth with signal output part;
Described filter capacitor positive pole links to each other minus earth with described signal output part.
On the other hand, the utility model also provides a kind of electronic equipment; This equipment comprises: balanced output circuit as mentioned above.
The balanced output circuit that the utility model provides and have the electronic equipment of this circuit amplifies branch road, current-limiting protection branch road and hygral equilibrium branch road by difference and can ensure stable output; Compared with prior art, the utility model can amplify that branch road reduces because the output that causes of input difference changes by difference; Reduce because ambient temperature exists the caused output of bigger variation to change by the hygral equilibrium branch road, thereby realized the stable output of entire circuit.
Description of drawings
The structural representation of a kind of balanced output circuit that Fig. 1 provides for the utility model embodiment;
The circuit diagram of a kind of balanced output circuit that Fig. 2 provides for the utility model embodiment;
The structural representation of a kind of electronic equipment that Fig. 3 provides for the utility model embodiment.
Embodiment
A kind of balanced output circuit that the utility model embodiment is provided below in conjunction with accompanying drawing and the electronic equipment with this circuit are described in detail.
As shown in Figure 1, be a kind of balanced output circuit that the utility model embodiment provides, this circuit comprises: difference is amplified branch road 101, current-limiting protection branch road 102 and hygral equilibrium branch road 103; Described difference is amplified branch road 101 and is linked to each other with described hygral equilibrium branch road 103 by described current-limiting protection branch road 102.
As shown in Figure 2, be a kind of balanced output circuit that the utility model provides, this circuit comprises: difference is amplified branch road, current-limiting protection branch road and hygral equilibrium branch road; Described difference is amplified branch road and is linked to each other with described hygral equilibrium branch road by described current-limiting protection branch road.
Wherein, described difference amplification branch road comprises: the first triode V436, the second triode V437, first resistance R 444, second resistance R 441 and the 3rd resistance R 443;
The described first triode V436 base stage is a signal input part, and the described first triode V436 emitter links to each other with an end of described first resistance R 444, another termination first power supply HVCC of described first resistance R 444; The described first triode V436 collector electrode links to each other with an end of described second resistance R 441, the other end ground connection GND of described second resistance R 441;
The described second triode V437 emitter links to each other with the end that described first resistance holds R444, and the described second triode V437 collector electrode links to each other with an end of described the 3rd resistance R 443, the other end ground connection GND of described the 3rd resistance R 443; The described second triode V437 base stage links to each other with described hygral equilibrium branch road by described current-limiting protection branch road.
Described current-limiting protection branch road comprises: current-limiting resistance R446; Described current-limiting resistance R446 one end links to each other with the base stage of the described second triode V437, and the other end links to each other with described hygral equilibrium branch road.
Described hygral equilibrium branch road comprises: the 4th resistance R T459 and the 5th resistance R T459A; Described the 4th resistance R T459 and described the 5th resistance R T459A are connected in parallel; The end of described the 4th resistance TR459 that is connected in parallel and the 5th resistance R T459A links to each other with described current-limiting resistance R446, and the other end is used for output.Wherein, described the 5th resistance R T459A is the resistance of negative temperature coefficient feature.Described the 4th resistance R T459 and the 5th resistance R T459A all can get 15K ohm.
Described balanced output circuit also comprises: the 6th resistance R 440, the 7th resistance R 422, the 8th resistance R 230, the 9th resistance R 424, the tenth resistance R the 442, the 11 resistance R the 447, the 12 resistance R 450, the 3rd triode V435, the 4th triode V440, the 5th triode V302 and the first diode VD422;
Described the 6th resistance R 440 1 ends are signal input part, and the other end links to each other with described the 3rd triode V435 base stage;
Described the 7th resistance R 422 1 ends link to each other with described the 3rd triode V435 base stage, and the other end links to each other with second source+5V-2;
Described the 3rd triode V435 collector electrode links to each other with described the 8th resistance R 230, and described the 8th resistance R 230 other ends link to each other with the described first power supply HVCC; Described the 3rd triode V435 emitter links to each other with described the 9th resistance R 424, described the 9th resistance R 424 other end ground connection; Described the 3rd triode V435 collector electrode also links to each other with the base stage of the described first triode V436, is used for the input signal that described signal input part receives is input to the described first triode V436;
One end of described the tenth resistance R 442 links to each other with the described first triode V436 collector electrode, and the other end links to each other with described the 4th triode V440 base stage;
Described the 4th triode V440 emitter links to each other with the described first power supply HVCC by described the 11 resistance R 447; Described the 4th triode V440 grounded collector GND; Described the 4th triode V440 emitter links to each other with described the 5th triode V302 base stage by the described first diode VD422;
The described first diode VD422 positive pole links to each other with described the 4th triode V440 emitter, and negative pole is by described the 12 resistance R 450 ground connection GND; The described first diode VD422 negative pole also links to each other with described the 5th triode V302 base stage;
Described the 5th triode V302 collector electrode is used for signal output, grounded emitter GND.
Described balanced output circuit also comprises: the first divider resistance R448, the second divider resistance R449 and the 3rd divider resistance R451;
The described first divider resistance R448, one end links to each other with the described first power supply HVCC, and the other end links to each other with the described second divider resistance R449; The described second divider resistance R449 other end ground connection GND;
Described the 3rd divider resistance R451 one end links to each other with the non-earth terminal of the described second divider resistance R449, and the other end links to each other with described the 5th triode V302 collector electrode.
Described balanced output circuit also comprises: protective resistance R421, voltage-stabiliser tube VD421, filter capacitor C421;
Described protective resistance R421 one end links to each other with the collector electrode of described the 5th triode V302, and the other end is used for signal output;
Described voltage-stabiliser tube VD421 negative pole links to each other plus earth GND with signal output part;
Described filter capacitor C421 positive pole links to each other minus earth GND with described signal output part.
What deserves to be explained is, the differential amplifier circuit that above-described balanced output circuit is made up of V436 and V437 and, R446, RT459 and RT459A form.Its operation principle is as follows: the differential amplifier circuit itself that V436 and V437 form can reduce because the output that input difference causes changes; The hygral equilibrium branch road in parallel that RT459 and RT459A form not only has the characteristic of negative temperature coefficient but also its resistance is limited between the 0-15K, is unlikely to cause the basic change of original circuit function when making variations in temperature.When temperature raise (perhaps reducing) electric current of R446 is reduced when (perhaps increasing), the R451 pressure drop reduces, V302 (3DD3853) collector voltage raises, simultaneously because the V437 emitter current reduces to make the R444 pressure drop also to reduce, the V436 emitter voltage increases electric current and increases, R441 pressure reduction increases, the V440 base voltage increases thereupon, it is thereby that the increase of triode V302 base voltage makes the V302 collector voltage reduce that the V440 emitter voltage also increases, form a complete negative-feedback circuit like this, simultaneously because RT459A has the characteristic of negative temperature coefficient, also can cause that the R446 electric current plays balanced compensated effect when changing in variations in temperature, final two parts circuit synthesis effect makes entire circuit have stable output, has improved the adaptive capacity and the practicability and effectiveness of entire circuit.
As shown in Figure 3, a kind of electronic equipment that provides for the utility model; This equipment comprises: the above balanced output circuit.
The balanced output circuit that the utility model provides and have the electronic equipment of this circuit amplifies branch road, current-limiting protection branch road and hygral equilibrium branch road by difference and makes and can ensure stable output; Compared with prior art, the utility model can amplify that branch road reduces because the output that causes of input difference changes by difference; Reduce because ambient temperature exists the caused output of bigger variation to change by the hygral equilibrium branch road, thereby realized the stable output of entire circuit.
The above; it only is embodiment of the present utility model; protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, all should be encompassed within the protection range of the present utility model.
Claims (9)
1. a balanced output circuit is characterized in that, comprising: difference is amplified branch road, current-limiting protection branch road and hygral equilibrium branch road; Described difference is amplified branch road and is linked to each other with described hygral equilibrium branch road by described current-limiting protection branch road.
2. balanced output circuit according to claim 1 is characterized in that, described difference is amplified branch road and comprised: first triode, second triode, first resistance, second resistance and the 3rd resistance; Described first transistor base is a signal input part, and described first transistor emitter links to each other with an end of described first resistance, another termination first power supply of described first resistance; Described first transistor collector links to each other with an end of described second resistance, the other end ground connection of described second resistance; Described second transistor emitter links to each other with an end of described first resistance, and described second transistor collector links to each other with an end of described the 3rd resistance, the other end ground connection of described the 3rd resistance; Described second transistor base links to each other with described hygral equilibrium branch road by described current-limiting protection branch road.
3. balanced output circuit according to claim 2 is characterized in that, described current-limiting protection branch road comprises: current-limiting resistance; Described current-limiting resistance one end links to each other with the base stage of described second triode, and the other end links to each other with described hygral equilibrium branch road.
4. balanced output circuit according to claim 3 is characterized in that, described hygral equilibrium branch road comprises: the 4th resistance and the 5th resistance; Described the 4th resistance and described the 5th resistance are connected in parallel; One end of described the 4th resistance that is connected in parallel and the 5th resistance links to each other with described current-limiting resistance, and the other end is used for output.
5. balanced output circuit according to claim 4 is characterized in that, described the 5th resistance is the resistance of negative temperature coefficient feature.
6. balanced output circuit according to claim 5, it is characterized in that, described balanced output circuit also comprises: the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 3rd triode, the 4th triode, the 5th triode and first diode;
Described the 6th resistance one end is a signal input part, and the other end links to each other with described the 3rd transistor base;
Described the 7th resistance one end links to each other with described the 3rd transistor base, and the other end links to each other with second source;
Described the 3rd transistor collector links to each other with described the 8th resistance, and described the 8th resistance other end links to each other with described first power supply; Described the 3rd transistor emitter links to each other with described the 9th resistance, described the 9th resistance other end ground connection; Described the 3rd transistor collector also links to each other with the base stage of described first triode, is used for the input signal that described signal input part receives is input to described first triode;
One end of described the tenth resistance links to each other with described first transistor collector, and the other end links to each other with described the 4th transistor base;
Described the 4th transistor emitter links to each other with described first power supply by described the 11 resistance; Described the 4th transistor collector ground connection; Described the 4th transistor emitter links to each other with described the 5th transistor base by described first diode;
Described first diode cathode links to each other with described the 4th transistor emitter, and negative pole is by described the 12 grounding through resistance; Described first diode cathode also links to each other with described the 5th transistor base;
Described the 5th transistor collector is used for signal output, grounded emitter.
7. balanced output circuit according to claim 6 is characterized in that, described balanced output circuit also comprises: first divider resistance, second divider resistance and the 3rd divider resistance;
Described first divider resistance, one end links to each other with described first power supply, and the other end links to each other with described second divider resistance; The described second divider resistance other end ground connection;
Described the 3rd divider resistance one end links to each other with the non-earth terminal of described second divider resistance, and the other end links to each other with described the 5th transistor collector.
8. balanced output circuit according to claim 7 is characterized in that, described balanced output circuit also comprises: protective resistance, voltage-stabiliser tube, filter capacitor;
Described protective resistance one end links to each other with the collector electrode of described the 5th triode, and the other end is used for signal output;
Described voltage-stabiliser tube negative pole links to each other plus earth with signal output part;
Described filter capacitor positive pole links to each other minus earth with described signal output part.
9. an electronic equipment is characterized in that, comprising: as any described balanced output circuit in the claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201783037U CN201479112U (en) | 2009-09-15 | 2009-09-15 | Balance output circuit and electronic equipment with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201783037U CN201479112U (en) | 2009-09-15 | 2009-09-15 | Balance output circuit and electronic equipment with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201479112U true CN201479112U (en) | 2010-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201783037U Expired - Fee Related CN201479112U (en) | 2009-09-15 | 2009-09-15 | Balance output circuit and electronic equipment with same |
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|---|---|
| CN (1) | CN201479112U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427776A (en) * | 2013-08-30 | 2013-12-04 | 昆山奥德鲁自动化技术有限公司 | Amplification circuit |
| CN112103917A (en) * | 2020-09-29 | 2020-12-18 | 青岛海信移动通信技术股份有限公司 | Electronic equipment and water inlet protection method |
-
2009
- 2009-09-15 CN CN2009201783037U patent/CN201479112U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427776A (en) * | 2013-08-30 | 2013-12-04 | 昆山奥德鲁自动化技术有限公司 | Amplification circuit |
| CN112103917A (en) * | 2020-09-29 | 2020-12-18 | 青岛海信移动通信技术股份有限公司 | Electronic equipment and water inlet protection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20120915 |