CN105429461A - Linear voltage-stabilizing circuit with continuously adjustable output voltage and power supply having the circuit - Google Patents
Linear voltage-stabilizing circuit with continuously adjustable output voltage and power supply having the circuit Download PDFInfo
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- CN105429461A CN105429461A CN201510745630.6A CN201510745630A CN105429461A CN 105429461 A CN105429461 A CN 105429461A CN 201510745630 A CN201510745630 A CN 201510745630A CN 105429461 A CN105429461 A CN 105429461A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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Abstract
The invention discloses a linear voltage-stabilizing circuit with continuously adjustable output voltage and a power supply having the circuit. The linear voltage-stabilizing circuit with continuously adjustable output voltage includes a voltage-stabilizing input stage module and an amplification stage module. The amplification stage module includes an intermediate amplification stage module, or includes an intermediate amplification stage module and an output amplification stage module. The voltage-stabilizing input stage module is used for generating a reference voltage; the intermediate amplification stage module is used for performing power amplification processing on the reference voltage and outputting an amplified voltage signal or sending to the output amplification stage module; and the output amplification stage module is used for performing output power amplification on the voltage signal and sending to a post-stage. By adoption of the linear voltage-stabilizing circuit with continuously adjustable output voltage and the power supply having the circuit, voltage output is stable and adjustable, influence by temperature and input voltage is small, and the linear voltage-stabilizing circuit and the power supply having the same are simple and reliable, and has relatively high cost performance.
Description
Technical field
The present invention relates to electric and electronic technical field, particularly the continuously adjustable linear voltage-stabilizing circuit of a kind of output voltage and there is the power supply of this circuit.
Background technology
With science and technology growing, electronics categories gets more and more, and power supply supporting is with it also different.Electronic products different in the prior art, according to different applications and apply property, needs supporting power supply also different.But in the prior art scheme, the voltage stabilizing chip in power supply adopts ready-made three-terminal voltage-stabilizing chip usually, as LM1117-3.3V; But this chip price is relatively expensive, temperature drift is larger, and output voltage is scarcely adjustable.Also have some existing voltage stabilizing schemes then to adopt the feedback of operational amplifier to export, build corresponding output circuit, as voltage follower circuit, forward amplification output circuit etc., but the price of this kind of voltage stabilizing circuit is relative also more expensive, and current output capability is poor.
Inventor in the process of designing power supply voltage stabilizing circuit, inventor finds that in prior art, at least there are the following problems:
The circuit design cost realizing now voltage stabilizing function is higher, and temperature drift is larger, and output voltage is non-adjustable and current output capability is poor.
Summary of the invention
In view of the above problems, the present invention is proposed to provide a kind of overcoming the problems referred to above or the continuously adjustable linear voltage-stabilizing circuit of a kind of output voltage solved the problem at least in part and the power supply with this circuit.
According to one aspect of the present invention, the invention provides the continuously adjustable linear voltage-stabilizing circuit of a kind of output voltage, this circuit comprises: voltage stabilizing input stage module and amplifying stage module; Described amplifying stage module comprises: interstage amplifier section module; Or described amplifying stage module comprises: interstage amplifier section module and output amplifier stage module;
Described voltage stabilizing input stage module, for generating a reference voltage;
Described interstage amplifier section module, for described reference voltage is carried out power amplification process, and exports the voltage signal after described amplification, or sends to described output amplifier stage module;
Described output amplifier stage module, for described voltage signal is carried out power output amplification, and sends to rear class.
Wherein, described voltage stabilizing input stage module comprises: the first triode Q1 and the first diode V5, the first resistance R15, the second resistance R16 and the 3rd resistance R14;
Described 3rd resistance R14 mono-termination input Vin, the first triode Q1 collector electrode described in another termination and described interstage amplifier section module attachment end;
Described first triode Q1 base stage connects described first resistance R15 and described second resistance R16 link;
Described first triode Q1 grounded emitter;
The positive input of the first diode V5 described in described first another termination of resistance R15; The negative sense output head grounding of described first diode V5;
Described another termination reference voltage output end of second resistance R16.
Wherein, described voltage stabilizing input stage module also comprises: the first voltage-stabiliser tube Z1;
Described first voltage-stabiliser tube Z1 positive input ground connection;
Described first voltage-stabiliser tube Z1 negative input connects described first triode Q1 emitter.
Wherein, the first diode V5 in described voltage stabilizing input stage module is Schottky tube; Described second resistance R16 is variable resistor; When comprising the first voltage-stabiliser tube Z1 in described voltage stabilizing input stage module, described first diode V5 is silicon diode.
Wherein, described interstage amplifier section module comprises: the second triode Q2 and the 4th resistance R17;
Described second triode Q2 base stage connects described 4th resistance R17 and described second resistance R16 link; 3rd resistance R14 described in described 4th another termination of resistance R17 and described first triode Q1 collector electrode link;
Described second triode Q2 emitter meets described output end vo ut;
Described second triode Q2 collector electrode meets described output amplifier stage module or input Vin;
Or,
Described second triode Q2 base stage connects described 4th resistance R17 one end; 3rd resistance R14 described in described 4th another termination of resistance R17 and described first triode Q1 collector electrode link;
Described second triode Q2 emitter meets described output end vo ut;
Described second triode Q2 collector electrode meets described output amplifier stage module or input Vin.
Wherein, described interstage amplifier section module comprises: the second triode Q2 and the second diode V2;
Described second triode Q2 base stage connects described second diode V2 negative pole end and described second resistance R16 link; 3rd resistance R14 described in described second diode V2 positive pole termination and described first triode Q1 collector electrode link;
Described second triode Q2 emitter meets described output end vo ut;
Described second triode Q2 collector electrode meets described output amplifier stage module or input Vin;
Or,
Described second triode Q2 base stage connects described second diode V2 negative pole end; 3rd resistance R14 described in described second diode V2 positive pole termination and described first triode Q1 collector electrode link;
Described second triode Q2 emitter meets described output end vo ut;
Described second triode Q2 collector electrode meets described output amplifier stage module or input Vin.
Wherein, described output amplifier stage module comprises: the 3rd triode Q10 and the 5th resistance R13;
Described 3rd triode Q10 base stage connects described second triode Q2 collector electrode, and described 3rd triode Q10 emitter meets described input Vin, and described 3rd triode Q10 collector electrode meets described output end vo ut;
Output end vo ut described in described 5th resistance R13 mono-termination, other end ground connection.
Wherein, described output amplifier stage module also comprises: output diode V1;
Described output diode V1 positive input connects described 3rd triode Q10 collector electrode;
Described output diode V1 negative input meets described output end vo ut.
Wherein, described second triode Q2 and the 3rd triode Q10 forms darlington structure.
According to another aspect of the present invention, the invention provides a kind of power supply, this power supply comprises: the continuously adjustable linear voltage-stabilizing circuit of output voltage as mentioned above.
The invention has the beneficial effects as follows: the present invention by described voltage stabilizing input stage module, for generating a voltage-reference; Described interstage amplifier section module and described output amplifier stage module improve current output capability, thus make voltage stable output and adjustable, and affect little by temperature and input voltage, simple and reliable, cost performance is higher.Wherein, the present invention adopts the PN junction temperature of Schottky tube V5 and described first triode to float and can well offset, produce stable voltage-reference, described interstage amplifier section module and described output amplifier stage module adopt pliotron i.e. the second triode and the 3rd triode to adapt to amplify, output current ability is improved, output voltage stabilization.
Accompanying drawing explanation
Fig. 1 is the continuously adjustable linear voltage-stabilizing circuit structural representation of a kind of output voltage provided by the invention;
Fig. 2 is the continuously adjustable linear voltage-stabilizing circuit figure of a kind of output voltage provided by the invention;
Fig. 3 is the continuously adjustable linear voltage-stabilizing circuit structural representation of a kind of output voltage provided by the invention;
Fig. 4 is the continuously adjustable linear voltage-stabilizing circuit figure of a kind of output voltage provided by the invention;
Fig. 5 is the continuously adjustable linear voltage-stabilizing circuit structural representation of a kind of output voltage provided by the invention;
Fig. 6 is the continuously adjustable linear voltage-stabilizing circuit figure of a kind of output voltage provided by the invention;
Fig. 7 is the continuously adjustable linear voltage-stabilizing circuit figure of a kind of output voltage provided by the invention;
Fig. 8 is a kind of power supply architecture schematic diagram provided by the invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
The invention provides the continuously adjustable linear voltage-stabilizing circuit of a kind of output voltage and there is the power supply of this circuit.
Fig. 1 is that this circuit comprises: voltage stabilizing input stage module 101 and amplifying stage module 102 in order the invention provides the continuously adjustable linear voltage-stabilizing circuit structural representation of a kind of output voltage; Described amplifying stage module 102 comprises: interstage amplifier section module 1021; Or described amplifying stage module comprises: interstage amplifier section module 1021 and output amplifier stage module 1022;
Described voltage stabilizing input stage module 101, for generating a reference voltage;
Described interstage amplifier section module 1021, for described reference voltage is carried out power amplification process, and exports the voltage signal after described amplification, or sends to described output amplifier stage module 1022;
Described output amplifier stage module 1022, for described voltage signal is carried out power output amplification, and sends to rear class.
Based on above embodiment, as the continuously adjustable linear voltage-stabilizing circuit figure of a kind of output voltage that Fig. 2 provides for the embodiment of the present invention; This circuit comprises: voltage stabilizing input stage module and interstage amplifier section module; Wherein, described voltage stabilizing input stage module as shown in Figure 6, comprising: the first triode Q1 and the first diode V5, the first resistance R15, the second resistance R16 and the 3rd resistance R14;
Described interstage amplifier section module comprises: the second triode Q2 and the 4th resistance R17;
Described 3rd resistance R14 mono-termination input Vin, the first triode Q1 collector electrode described in another termination and described 4th resistance R17 link;
Described first triode Q1 base stage connects described first resistance R15 and described second resistance R16 link;
Described first triode Q1 grounded emitter;
The positive input of the first diode V5 described in described first another termination of resistance R15; The negative sense output head grounding of described first diode V5;
Described another termination reference voltage output end of second resistance R16 and the described 4th resistance R17 other end.
Described second triode Q2 base stage connects described 4th resistance R17 and described second resistance R16 link; 3rd resistance R14 described in described 4th another termination of resistance R17 and described first triode Q1 collector electrode link;
Described second triode Q2 emitter meets described output end vo ut;
Described second triode Q2 collector electrode meets input Vin.
It should be noted that, this output can also comprise: the 5th resistance R13;
Output end vo ut described in described 5th resistance R13 mono-termination, other end ground connection.
Be illustrated in figure 3 the continuously adjustable linear voltage-stabilizing circuit figure of another kind of output voltage that the embodiment of the present invention provides, this circuit comprises: voltage stabilizing input stage module and interstage amplifier section module; Wherein, described voltage stabilizing input stage module comprises: the first triode Q1 and the first diode V5, the first resistance R15, the second resistance R16 and the 3rd resistance R14;
Described interstage amplifier section module comprises: the second triode Q2 and the 4th resistance R17;
Described 3rd resistance R14 mono-termination input Vin, the first triode Q1 collector electrode described in another termination and described 4th resistance R17 link;
Described first triode Q1 base stage connects described first resistance R15 and described second resistance R16 link;
Described first triode Q1 grounded emitter;
The positive input of the first diode V5 described in described first another termination of resistance R15; The negative sense output head grounding of described first diode V5;
Described another termination reference voltage output end of second resistance R16;
Described second triode Q2 base stage connects described 4th resistance R17 one end; 3rd resistance R14 described in described 4th another termination of resistance R17 and described first triode Q1 collector electrode link;
Described second triode Q2 emitter meets described output end vo ut;
Described second triode Q2 collector electrode meets input Vin.
It should be noted that, the module of output amplifier stage as shown in Figure 3 also comprises: output diode V1;
Described output diode V1 positive input connects described second triode Q2 emitter and described second resistance R16 link;
Described output diode V1 negative input meets described output end vo ut.
Based on embodiment described in above Fig. 2, as shown in Figure 4, be the continuously adjustable linear voltage-stabilizing circuit figure of another kind of output voltage that the embodiment of the present invention provides; The continuously adjustable linear voltage-stabilizing circuit of described output voltage comprises: voltage stabilizing input stage module, interstage amplifier section module and output amplifier stage module;
Described voltage stabilizing input stage module comprises: the first triode Q1 and the first diode V5, the first resistance R15, the second resistance R16 and the 3rd resistance R14;
Described interstage amplifier section module comprises: the second triode Q2 and the 4th resistance R17;
Described output amplifier stage module comprises: the 3rd triode Q10 and the 5th resistance R13;
Described 3rd resistance R14 mono-termination input Vin, the first triode Q1 collector electrode described in another termination and described 4th resistance R17 link;
Described first triode Q1 base stage connects described first resistance R15 and described second resistance R16 link;
Described first triode Q1 grounded emitter;
The positive input of the first diode V5 described in described first another termination of resistance R15; The negative sense output head grounding of described first diode V5;
Described another termination reference voltage output end of second resistance R16.
Described second triode Q2 base stage connects described 4th resistance R17 and described second resistance R16 link; 3rd resistance R14 described in described 4th another termination of resistance R17 and described first triode Q1 collector electrode link;
Described second triode Q2 emitter meets described output end vo ut;
Described second triode Q2 collector electrode meets input Vin.
Described 3rd triode Q10 base stage connects described second triode Q2 collector electrode, and described 3rd triode Q10 emitter meets described input Vin, and described 3rd triode Q10 collector electrode meets described output end vo ut;
Output end vo ut described in described 5th resistance R13 mono-termination, other end ground connection.
Based on embodiment as shown in Figure 3, be illustrated in figure 5 the continuously adjustable linear voltage-stabilizing circuit figure of another kind of output voltage that the embodiment of the present invention provides; This circuit comprises: voltage stabilizing input stage module, interstage amplifier section module and output amplifier stage module; Wherein, described voltage stabilizing input stage module comprises: the first triode Q1 and the first diode V5, the first resistance R15, the second resistance R16 and the 3rd resistance R14;
Described interstage amplifier section module comprises: the second triode Q2 and the 4th resistance R17;
Described output amplifier stage module comprises: the 3rd triode Q10 and the 5th resistance R13;
Described 3rd resistance R14 mono-termination input Vin, the first triode Q1 collector electrode described in another termination and described 4th resistance R17 link;
Described first triode Q1 base stage connects described first resistance R15 and described second resistance R16 link;
Described first triode Q1 grounded emitter;
The positive input of the first diode V5 described in described first another termination of resistance R15; The negative sense output head grounding of described first diode V5;
Described another termination reference voltage output end of second resistance R16;
Described second triode Q2 base stage connects described 4th resistance R17 one end; 3rd resistance R14 described in described 4th another termination of resistance R17 and described first triode Q1 collector electrode link;
Described second triode Q2 emitter meets described output end vo ut;
Described second triode Q2 collector electrode meets input Vin.
Described 3rd triode Q10 base stage connects described second triode Q2 collector electrode, and described 3rd triode Q10 emitter meets described input Vin, and described 3rd triode Q10 collector electrode meets described output end vo ut;
Output end vo ut described in described 5th resistance R13 mono-termination, other end ground connection.
It should be noted that, the module of output amplifier stage as shown in Figure 5 also comprises: output diode V1;
Described output diode V1 positive input connects described second triode Q2 emitter and described second resistance R16 link;
Described output diode V1 negative input meets described output end vo ut.
It should be noted that, the module of voltage stabilizing input stage described in the above embodiment also comprises: the first voltage-stabiliser tube Z1 as shown in Figure 7;
Described first voltage-stabiliser tube Z1 positive input ground connection;
Described first voltage-stabiliser tube Z1 negative input connects described first triode Q1 emitter.
Also it should be noted that, the first diode V5 in described voltage stabilizing input stage module is Schottky tube; Described second resistance R16 is variable resistor; When comprising the first voltage-stabiliser tube Z1 in described voltage stabilizing input stage module, described first diode V5 is silicon diode.
Based on above embodiment circuit diagram, carry out circuit theory and be analyzed as follows:
First, what the present invention proposed is the continuously adjustable linear voltage-stabilizing circuit of a kind of output voltage, this circuit can any voltage reference device, formation voltage benchmark, but utilize the PN junction pressure drop of triode BE two interpolar to carry out the voltage difference after Design of Temperature Compensation as a reference source, use an adjustable resistance (i.e. the second resistance R16) regulation output reference voltage, as Fig. 6, Vin is input voltage input, GND is power supply ground, V5 is that Schottky tube is in order to offset the PN junction temperature drift of Q1 triode BE two interpolar, resistance R15 both end voltage is made namely to stabilize to a reference source, about 0.41V, Vref is output reference voltage, when triode multiplication factor is enough large:
Vref＝VR1+VR2+V1(1)
Wherein: VR1 is resistance R15 both end voltage
VR2 is resistance R16 both end voltage
V5 is Schottky diode V5 forward voltage drop
Described resistance R17, being replace with PN junction or direct short circuit in some cases, also can be connected in series PN junction, such as structure shown in Fig. 3 and Fig. 5.
For offsetting the drift of V5 temperature or preventing electric current from recharging under a lot of application, Vref exports also can connect PN junction.
When output voltage is greater than 5V, reference diagram 6 designs, and the voltage reference device such as voltage-stabiliser tube also can be used to make the reference voltage generating circuit of figure below as Fig. 7: wherein voltage-stabiliser tube Z1 chooses 5-6V (temperature drift is little), and V5 can make silicon diode into.
As Fig. 4 and Fig. 5, with circuit structure shown in Fig. 2 and Fig. 3, visible two kinds of circuit framework essential difference are reference voltages is B pole or the E pole of accessing Q2, as follows for the framework of Fig. 5 explanation principle:
Wherein, mark Vin's is incoming level, and mark GND's is power supply ground, and mark Vout's is output level.
Its principle can be analyzed by three grades of circuit
The peripheral circuit of Q1NPN triode comprises: V5 Schottky tube, R15 resistance, R16 variable resistor, R14 resistance generate reference voltage as shown in Figure 6 together, is voltage stabilizing input stage module;
Q2NPN triode and resistance R17 form interstage amplifier section module;
Q10PNP triode and resistance R13 are output amplifier stage modules;
First, V5 Schottky tube in voltage stabilizing input stage and resistance R15 also have together with the PN junction at BE the two poles of the earth of Q7NPN triode and produce a voltage-reference, the i.e. voltage at R15 resistance two ends, be designated as V15, experiment records its value and is about 0.41V, temperature due to V5 Schottky tube and triode PN junction is floated and is cancelled out each other, and this value variation with temperature is very little.Because the multiplication factor of Q1 triode under this condition of work is very large, can ignores so Q1 transistor base electric current is approximate, so clearly can see R16 resistance both end voltage, be designated as V16=(R16/R15) * V15 (2)
Interstage amplifier section and output amplifier stage are all to improve current output capability.The Q10PNP triode of certain output amplifier stage also can make NPN triode into, makes the Q2 triode of itself and interstage amplifier section form darlington structure and exports.
Can obviously see, last output voltage
Vout＝V15+V16+V5(3)
Wherein: the forward voltage drop of V5:V5 Schottky tube
Finally also to add an output diode as shown in phantom in Figure 5, so will deduct its pressure again
Fall.The effect adding output diode mainly contains the temperature drift that two: is counteracting V5 self, obtains better temperature characterisitic,
Especially the successful when 0-4V low-voltage output; Two is will prevent electric current from recharging under some application, such as output
There is battery or anti-reverse.If because load current change causes the pressure drop of output diode unstable after adding output diode
And then affect output voltage stability, a R13 prestowage resistance can be added as framework 2.And little many than as shown in Figure 4 of prestowage needed for Fig. 5.The mode voltage stabilizings such as other such as output filter capacitor can certainly be taked depending on embody rule.
Carry out principles illustrated below by circuit diagram as shown in Figure 4, its general principle is roughly the same with Fig. 5, just should change Vout=V15+V16+V5-Vobe (4) into for formula (3)
Wherein: the pressure drop of Vobe:Q2 triode BE the two poles of the earth PN junction
After the visible value at resistance R16 is determined, output voltage is also just determined, maximum parameter is Vobe is different under unloaded and band carry state, Vobe=0 under desirable Light Condition, band carries under state and not to coexist 0.5V-0.7V range with output current, if so will prevent output voltage from changing by Vobe affects, preferably give and to add a suitable prestowage between output VO and GND Vobe is stablized, prestowage required for this framework is larger than framework 1, power-efficient is not high, but advantage also has good temperature characterisitic while of saving an output diode and prevents electric current from recharging.
In the version of the simplification especially after output amplifier stage removes, the simplification circuit of preferential recommendation Fig. 4, i.e. circuit as shown in Figure 2.
It should be noted that, the resolution circuitry figure of the simplification of described Fig. 5 after output amplifier stage removes is Fig. 3.
If also add output diode V1 in Fig. 3, two kinds to simplify prestowage R13 required for version the same, comparatively speaking Fig. 2 due to element more succinct less.
The Main Function of R17 resistance is current limliting; if electric current can reduce too greatly output voltage significantly play certain protection; certainly this and output voltage stability require it is conflict; so value size is decided by user demand; it is 0 Europe that pursuit output voltage stability can reduce the even direct short circuit of this resistance sizes, needs overcurrent protection then can increase this resistance value.
At output current 20mA, input voltage 5V, under experiment condition when output voltage is adjusted to 3.3V, records the element configuring certain design parameter by framework 2 and records electric current and increase 7mA, and output voltage declines about 5mV, and temperature rises 50 degree, and output voltage declines about 50mV.Input voltage rising 1V, output voltage rises about 0.2V, can select the element of applicable embody rule as required.
The present invention has used Schottky tube and triode PN junction temperature to float the characteristic that can well offset and has produced stable voltage-reference, produces stable output voltage with the feedback circuit of triode, and output stage adopts pliotron to adapt to large output current.Voltage stable output and adjustable, affect little by temperature and input voltage, frequency characteristic is good, can not connect output capacitance and also can obtain lower output ripple under major applications, and simple and reliable, cost performance is apparently higher than conventional power source design.
Also it should be noted that, the present invention also has several practical modification as follows:
1, if wish that output voltage is subject to the impact of input voltage little as far as possible, so Q1 can be changed into the higher triode of multiplication factor or Darlington transistor.
2, if less demanding to the voltage regulation performance exported, do not consider that input voltage is on the impact exported, and so also can directly change voltage stabilizing input stage as electric resistance partial pressure form into yet.
3, if do not consider adjustable fan-out capability, so also voltage stabilizing input stage can be changed into the form of resistant series voltage-stabiliser tube.
4, also can make interstage amplifier section and output amplifier stage into the larger triode of multiplication factor or Darlington transistor as required, to obtain larger current output capability.
As shown in Figure 8, be a kind of power supply that the embodiment of the present invention provides, this power supply comprises: the continuously adjustable linear voltage-stabilizing circuit of output voltage described in any one as mentioned above.
The invention has the beneficial effects as follows: the present invention by described voltage stabilizing input stage module, for generating a voltage-reference; Described interstage amplifier section module and described output amplifier stage module improve current output capability, thus make voltage stable output and adjustable, and affect little by temperature and input voltage, simple and reliable, cost performance is higher.Wherein, the present invention adopts the PN junction temperature of Schottky tube V5 and described first triode to float and can well offset, produce stable voltage-reference, described interstage amplifier section module and described output amplifier stage module adopt pliotron i.e. the second triode and the 3rd triode to adapt to amplify, output current ability is improved, output voltage stabilization.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (10)
1. the continuously adjustable linear voltage-stabilizing circuit of output voltage, is characterized in that, comprising: voltage stabilizing input stage module and amplifying stage module; Described amplifying stage module comprises: interstage amplifier section module; Or described amplifying stage module comprises: interstage amplifier section module and output amplifier stage module;
Described voltage stabilizing input stage module, for generating a reference voltage;
Described interstage amplifier section module, for described reference voltage is carried out power amplification process, and exports the voltage signal after described amplification, or sends to described output amplifier stage module;
Described output amplifier stage module, for described voltage signal is carried out power output amplification, and sends to rear class.
2. the continuously adjustable linear voltage-stabilizing circuit of output voltage as claimed in claim 1, it is characterized in that, described voltage stabilizing input stage module comprises: the first triode Q1 and the first diode V5, the first resistance R15, the second resistance R16 and the 3rd resistance R14;
Described 3rd resistance R14 mono-termination input Vin, the first triode Q1 collector electrode described in another termination and described interstage amplifier section module attachment end;
Described first triode Q1 base stage connects described first resistance R15 and described second resistance R16 link;
Described first triode Q1 grounded emitter;
The positive input of the first diode V5 described in described first another termination of resistance R15; The negative sense output head grounding of described first diode V5;
Described another termination reference voltage output end of second resistance R16.
3. the continuously adjustable linear voltage-stabilizing circuit of output voltage as claimed in claim 2, it is characterized in that, described voltage stabilizing input stage module also comprises: the first voltage-stabiliser tube Z1;
Described first voltage-stabiliser tube Z1 positive input ground connection;
Described first voltage-stabiliser tube Z1 negative input connects described first triode Q1 emitter.
4. the continuously adjustable linear voltage-stabilizing circuit of output voltage as claimed in claim 3, it is characterized in that, the first diode V5 in described voltage stabilizing input stage module is Schottky tube; Described second resistance R16 is variable resistor; When comprising the first voltage-stabiliser tube Z1 in described voltage stabilizing input stage module, described first diode V5 is silicon diode.
5. the continuously adjustable linear voltage-stabilizing circuit of output voltage as claimed in claim 4, it is characterized in that, described interstage amplifier section module comprises: the second triode Q2 and the 4th resistance R17;
Described second triode Q2 base stage connects described 4th resistance R17 and described second resistance R16 link; 3rd resistance R14 described in described 4th another termination of resistance R17 and described first triode Q1 collector electrode link;
Described second triode Q2 emitter meets described output end vo ut;
Described second triode Q2 collector electrode meets described output amplifier stage module or input Vin;
Or,
Described second triode Q2 base stage connects described 4th resistance R17 one end; 3rd resistance R14 described in described 4th another termination of resistance R17 and described first triode Q1 collector electrode link;
Described second triode Q2 emitter meets described output end vo ut;
Described second triode Q2 collector electrode meets described output amplifier stage module or input Vin.
6. the continuously adjustable linear voltage-stabilizing circuit of output voltage as claimed in claim 4, it is characterized in that, described interstage amplifier section module comprises: the second triode Q2 and the second diode V2;
Described second triode Q2 base stage connects described second diode V2 negative pole end and described second resistance R16 link; 3rd resistance R14 described in described second diode V2 positive pole termination and described first triode Q1 collector electrode link;
Described second triode Q2 emitter meets described output end vo ut;
Described second triode Q2 collector electrode meets described output amplifier stage module or input Vin;
Or,
Described second triode Q2 base stage connects described second diode V2 negative pole end; 3rd resistance R14 described in described second diode V2 positive pole termination and described first triode Q1 collector electrode link;
Described second triode Q2 emitter meets described output end vo ut;
Described second triode Q2 collector electrode meets described output amplifier stage module or input Vin.
7. the continuously adjustable linear voltage-stabilizing circuit of the output voltage as described in claim 5 or 6, is characterized in that, described output amplifier stage module comprises: the 3rd triode Q10 and the 5th resistance R13;
Described 3rd triode Q10 base stage connects described second triode Q2 collector electrode, and described 3rd triode Q10 emitter meets described input Vin, and described 3rd triode Q10 collector electrode meets described output end vo ut;
Output end vo ut described in described 5th resistance R13 mono-termination, other end ground connection.
8. the continuously adjustable linear voltage-stabilizing circuit of output voltage as claimed in claim 7, it is characterized in that, described output amplifier stage module also comprises: output diode V1;
Described output diode V1 positive input connects described 3rd triode Q10 collector electrode;
Described output diode V1 negative input meets described output end vo ut.
9. the continuously adjustable linear voltage-stabilizing circuit of output voltage as claimed in claim 8, is characterized in that,
Described second triode Q2 and the 3rd triode Q10 forms darlington structure.
10. a power supply, is characterized in that, comprising: as the continuously adjustable linear voltage-stabilizing circuit of output voltage as described in any one in claim 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510745630.6A CN105429461A (en) | 2015-11-05 | 2015-11-05 | Linear voltage-stabilizing circuit with continuously adjustable output voltage and power supply having the circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510745630.6A CN105429461A (en) | 2015-11-05 | 2015-11-05 | Linear voltage-stabilizing circuit with continuously adjustable output voltage and power supply having the circuit |
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| CN105429461A true CN105429461A (en) | 2016-03-23 |
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| CN201510745630.6A Pending CN105429461A (en) | 2015-11-05 | 2015-11-05 | Linear voltage-stabilizing circuit with continuously adjustable output voltage and power supply having the circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539976A (en) * | 2018-03-27 | 2018-09-14 | 深圳市科比特航空科技有限公司 | Adjustable regulator circuit |
| CN109857182A (en) * | 2019-02-26 | 2019-06-07 | 钜泉光电科技(上海)股份有限公司 | A kind of linear voltage-stabilizing circuit and chip |
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| JP2006094610A (en) * | 2004-09-22 | 2006-04-06 | Matsushita Electric Ind Co Ltd | Power supply ripple filter circuit |
| CN202455267U (en) * | 2011-07-08 | 2012-09-26 | 西安天照伟成电气有限公司 | Power supply circuit |
| CN203896181U (en) * | 2014-05-06 | 2014-10-22 | 江苏海事职业技术学院 | Voltage stabilizing circuit |
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- 2015-11-05 CN CN201510745630.6A patent/CN105429461A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006094610A (en) * | 2004-09-22 | 2006-04-06 | Matsushita Electric Ind Co Ltd | Power supply ripple filter circuit |
| CN202455267U (en) * | 2011-07-08 | 2012-09-26 | 西安天照伟成电气有限公司 | Power supply circuit |
| CN203896181U (en) * | 2014-05-06 | 2014-10-22 | 江苏海事职业技术学院 | Voltage stabilizing circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539976A (en) * | 2018-03-27 | 2018-09-14 | 深圳市科比特航空科技有限公司 | Adjustable regulator circuit |
| CN109857182A (en) * | 2019-02-26 | 2019-06-07 | 钜泉光电科技(上海)股份有限公司 | A kind of linear voltage-stabilizing circuit and chip |
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