CN107562109A - A kind of enhanced controllable voltage stabilizing source device - Google Patents
A kind of enhanced controllable voltage stabilizing source device Download PDFInfo
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- CN107562109A CN107562109A CN201710723734.6A CN201710723734A CN107562109A CN 107562109 A CN107562109 A CN 107562109A CN 201710723734 A CN201710723734 A CN 201710723734A CN 107562109 A CN107562109 A CN 107562109A
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Abstract
The invention discloses a kind of enhanced controllable voltage stabilizing source device, first pass through and synthesis amplification is carried out to the output signal of DAC control circuits and datum generation circuit, exported by regulated voltage level combiner circuit to enhancing output circuit, obtain controllable level Uo, after controllable level Uo is inputted to enhancing output circuit, controllable level Uo is set to realize the free switching absorbed between electric current and output current by output source circuit and absorption source circuit according to the change of load, and output level Vout, so as to realize that the two-way of circuit follows, output level Vout is filtered finally by filter circuit, filter out ripple caused by front-end circuit, filter circuit output signal is inputted to load circuit again.
Description
Technical field
The invention belongs to plate level power supply synthesis technical field, more specifically, is related to a kind of enhanced controllable steady
Pressure source instrumentation.
Background technology
Power supply is the energy source of all electronic system work, and reliable and stable power supply is the high performance base strip of system
Part.The supply of circuit board level power supply, the realization for the functional parameter of the module are then particularly important.The requirement of plate level power supply, lead to
It is high but relatively small to demanded power output to be often related to high level equalization, small volume and integrated level.
Traditional circuit board level power supply, such as+5.0V in digital display circuit, -5.2V ,+1.3V etc., generally use DC/DC
Method obtain, or then obtained for more low power demand using voltage-regulator diode method.But obtained using these methods
Plate level voltage-stabilized power supply, usual positive supply only have current output capability and lack current sink capability, negative supply only have electricity
Flow absorbability and lack current output capability.In more application scenario, the limitation of such output driving can not then meet
System needs.Such as load then requires wherein relatively high power supply (still when being full negative bias system (system power supply whole position negative supply)
It is so negative supply) there should be the ability of output current；Or for full positively biased system (all positive supplies of system power supply), then
It is required that wherein relatively low power supply (remaining as positive supply) should have the ability for absorbing electric current；In addition, in the load of significantly change
In, then it may require exporting voltage-stabilized power supply while there is output current and absorb the ability of electric current, such as LVPECL termination electricity
Source VTT(1.3V), the V when load-receipt high levelTTElectric current can be absorbed, otherwise electricity can be exported when load-receipt low level
Stream.Therefore, plate level voltage-stabilized power supply does not need only provide for the stable level needed for load system, it is also necessary to is being inhaled according to load change
Receive free switching between electric current and output current.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of enhanced controllable voltage stabilizing source device, utilize
Positive-negative power interleaved power, so as to provide reliable and stable source of stable pressure for circuit board level system.
For achieving the above object, a kind of enhanced controllable voltage stabilizing source device of the present invention, it is characterised in that including：It is defeated
Go out voltage controlable electric current, enhancing output circuit and filter circuit；
Described output voltage controlable electric current includes：DAC control circuits, datum generation circuit and regulated voltage level synthesis
Circuit；
Outside FPGA control signals input to DAC control circuits, DAC-circuit and input the outside FPGA control signals of input
Analog signal is converted into, labeled as controllable level VDAC signals；
Datum generation circuit produces the datum VREF needed for DAC chip；
Regulated voltage level combiner circuit receives controllable level VDAC signals and datum VREF simultaneously, then has by inside
The operational amplifier of high cmrr carries out synthesis amplification to controllable level VDAC signals and datum VREF, and output is controllable
Level Uo；
Described enhancing output circuit includes output source circuit and absorbs source circuit；
Controllable level Uo is inputted to enhancing output circuit, enables controllable level Uo according to the change of load by exporting
Source circuit and absorption source circuit realize the free switching absorbed between electric current and output current, and output level Vout, so as to real
Existing the two-way of circuit follows；
Described filter circuit is filtered to output level Vout, filters out ripple caused by front-end circuit, then will filtering
Circuit output signal is inputted to load circuit.
What the goal of the invention of the present invention was realized in：
A kind of enhanced controllable voltage stabilizing source device of the invention, is first passed through to DAC control circuits and datum generation circuit
Output signal carry out synthesis amplification, by regulated voltage level combiner circuit export to enhancing output circuit, obtain controllable level Uo,
After controllable level Uo is inputted to enhancing output circuit, enable controllable level Uo according to the change of load by output source circuit
The free switching absorbed between electric current and output current, and output level Vout are realized with absorbing source circuit, so as to realize circuit
It is two-way follow, output level Vout is filtered finally by filter circuit, filters out ripple caused by front-end circuit, then will
Filter circuit output signal is inputted to load circuit.
Meanwhile a kind of enhanced controllable voltage stabilizing source device of the present invention also has the advantages that：
(1), the present invention can not only provide the stable level needed for load system, can also absorbed according to load change
Free switching between electric current and output current, realize negative supply current input/output and positive electricity ource electric current input/output function；
(2), the present invention can effectively eliminate influence of the intermodulation distortion to waveform, improve the quality of waveform；
(3), can strengthen the driving force of circuit using output voltage controlable electric current, level equalization is high, small volume and
Integrated level is high.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of enhanced controllable voltage stabilizing source device of the present invention；
Fig. 2 is a kind of circuit diagram of enhanced controllable voltage stabilizing source device of the present invention.
Embodiment
The embodiment of the present invention is described below in conjunction with the accompanying drawings, so as to those skilled in the art preferably
Understand the present invention.Requiring particular attention is that in the following description, when known function and the detailed description of design perhaps
When can desalinate the main contents of the present invention, these descriptions will be ignored herein.
Embodiment
Fig. 1 is a kind of schematic diagram of enhanced controllable voltage stabilizing source device of the present invention.
In the present embodiment, as shown in figure 1, a kind of enhanced controllable voltage stabilizing source device of the present invention, including：Output voltage can
Control circuit 1, enhancing output circuit 2 and filter circuit 3；
Wherein, output voltage controlable electric current 1 includes：DAC control circuits 101, datum generation circuit 102 and voltage stabilizing electricity
Flat combiner circuit 103；
Outside FPGA control signals input to DAC control circuits 101, DAC control circuits 101 and control the outside FPGA of input
Signal input processed is converted into analog signal, can so obtain precisely controllable analog level, believe labeled as controllable level VDAC
Number；
Datum generation circuit 102 produces the datum VREF needed for DAC chip；
Regulated voltage level combiner circuit 103 receives controllable level VDAC signals and datum VREF simultaneously, then passes through inside
Operational amplifier with high cmrr carries out synthesis amplification to controllable level VDAC signals and datum VREF, output
Controllable level Uo；
Strengthening output circuit 2 includes output source circuit 201 and absorbs source circuit 202；
Controllable level Uo is inputted to enhancing output circuit 2, enables controllable level Uo according to the change of load by defeated
Go out source circuit 201 and absorb source circuit 202 and realize the free switching absorbed between electric current and output current, and output level
Vout, so as to realize that the two-way of circuit follows；
Filter circuit 3 is filtered to output level Vout, filters out ripple caused by front-end circuit, then filter circuit is defeated
Go out signal to input to load circuit.
Fig. 2 is a kind of circuit diagram of enhanced controllable voltage stabilizing source device of the present invention.
In the present embodiment, electricity is synthesized by regulated voltage level with datum generation circuit signal using DAC control circuits
Road is exported to enhancing output circuit, and VREF1 is system reference level in circuit, and VCC2 is positive supply, and VEE1 is negative supply.(1)
As enhancing output circuit input Vin>0 and VCC2>VREF1>When 0, Q1 conductings, Q2 cut-offs can be obtained, Q1 to RL arrives VREF1 roads
Conducting, i.e. positive supply output current.(2) as enhancing output circuit input Vin<0 and VREF1>0>During VEE1, Q2 can be obtained and led
Logical, Q1 cut-offs, VREF1 to RL to Q2 roads is turned on, i.e. positive supply input current.(3) as enhancing output circuit input Vin>0 and
VCC2>0>During VREF1, Q1 conductings, Q2 cut-offs can be obtained, Q1 to RL to VREF1 roads is turned on, i.e. negative supply output current.(4)
As enhancing output circuit input Vin<0 and VEE1<VREF1<When 0, Q2 conductings, Q1 cut-offs can be obtained, VREF1 to RL arrives Q2 roads
Conducting, i.e. negative supply input current.So Q1 is managed and the alternation in a complementary fashion of Q2 pipes, positive-negative power interleaved power, electricity
Realize two-way follow in road.The signal is by this enhancing output circuit output, after filtering generation of the circuit output as source of stable pressure
End.
Labor is carried out to regulated voltage level combiner circuit part with reference to Fig. 2：Regulated voltage level is understood by feedback analysis
What combiner circuit introduced is series voltage negtive backword, and input voltage signal Ui, i.e. Vp are to pass through resistance respectively by VDAC and VREF
R1 is acted on R2 synthesis in the in-phase end of amplifier, the output voltage signal Uo of amplifier by feedback resistance R4, R5 and R6
The end of oppisite phase of amplifier, " empty short " and " void is disconnected " characteristic from analysis integrated transporting discharging, the net input voltage of integrated transporting discharging is zero,
And Uo, Ui phase are identical, input is proportional to output, and its input impedance is equal to the internal driving of integrated transporting discharging, and internal driving
Much larger than input resistance and feedback resistance, so the input impedance of this regulated voltage level combiner circuit is high.In order to improve operational precision,
Regulated voltage level combiner circuit selects the integrated transporting discharging of high cmrr, and the present embodiment uses this regulated voltage level combiner circuit conduct
Pre-amplification circuit.
Source of stable pressure circuit output voltage Vout is by enhancing output circuit by the regulated voltage level combiner circuit signal inputted
What output was realized.According to " empty short " of integrated transporting discharging and " void is disconnected " concept, voltage is usual between two inputs of integrated transporting discharging
Close to 0, i.e. Vi=Vn-Vp, carrying out analysis to the circuit can draw：
(VREF-Vp)/R2+ (VDAC-Vp)/R1=0 (1)
(Vout-Vn)/R4=Vn/R3 (2)
Vn=Vp (3)
Joint solves above formula and can drawn：
VDAC+VREF*R1/R2=Vp* (R1+R2)/R2 (4)
Vn=Vout*R3/ (R3+R4) (5)
It can be released in conjunction with formula (3)：
VDAC+VREF*R1/R2=Vout*R3* (R1+R2)/(R3+R4) * R2 (6)
Therefore deduce that Vout output formula：
Vout=(VDAC*R2+VREF*R1)/R3* (R3+R4)/(R1+R2) (7)
The high-accuracy voltage index that can be needed according to formula above is, it is necessary to which explanation is：In enhancing output circuit
In, if it is considered that transistor actually enters characteristic, as cut-in voltage Uon between input voltage is less than b-e, Q1 pipes and Q2 pipes are equal
In cut-off state, it is, only working as | Vin |>During Uon, output voltage can just change with Vin.Therefore, when input voltage is
During sine wave, output voltage will produce distortion near Vin zero passages, that is, intermodulation distortion be present.Triode eliminates intermodulation distortion
Method is to set suitable quiescent point, avoids dead zone voltage so that manages in critical condition triode Q1 and is in Q2 pipes
Critical conduction or lightly conducting (having a small quiescent current) state.Resistance R6 addition can be very good in the present embodiment
The intermodulation distortion that recommending output mode is brought is eliminated, and the electric capacity C1 added can be very good to filter out the influence of harmonic band, make
The voltage signal of output more precisely meets the needs of actual circuit.
Although the illustrative embodiment of the present invention is described above, in order to the technology of the art
Personnel understand the present invention, it should be apparent that the invention is not restricted to the scope of embodiment, to the common skill of the art
For art personnel, if various change in the spirit and scope of the present invention that appended claim limits and determines, these
Change is it will be apparent that all utilize the innovation and creation of present inventive concept in the row of protection.
Claims (3)
- A kind of 1. enhanced controllable voltage stabilizing source device, it is characterised in that including：Output voltage controlable electric current, enhancing output circuit And filter circuit；Described output voltage controlable electric current includes：DAC control circuits, datum generation circuit and regulated voltage level synthesis electricity Road；Outside FPGA control signals input to DAC control circuits, DAC-circuit the outside FPGA control signals of input inputting conversion For analog signal, labeled as controllable level VDAC signals；Datum generation circuit produces the datum VREF needed for DAC chip；Regulated voltage level combiner circuit receives controllable level VDAC signals and datum VREF simultaneously, then has height altogether by inside The operational amplifier of mould rejection ratio carries out synthesis amplification to controllable level VDA signals and datum VREF, exports controllable level Uo；Described enhancing output circuit includes output source circuit and absorbs source circuit；Controllable level Uo is inputted to enhancing output circuit, enables controllable level Uo according to the change of load by output source electricity Road and absorption source circuit realize the free switching absorbed between electric current and output current, and output level Vout, so as to realize The two-way of circuit follows；Described filter circuit is filtered to output level Vout, filters out ripple caused by front-end circuit, then by filter circuit Output signal is inputted to load circuit.
- 2. the enhanced controllable voltage stabilizing source device of one kind according to claim 1, it is characterised in that described output source circuit It is using the transistor of a pair of mutual symmetries with absorbing source circuit, enhancing output circuit is realized using the transistor of mutual symmetry Recommending output mode.
- 3. the enhanced controllable voltage stabilizing source device of one kind according to claim 1, it is characterised in that described regulated voltage level closes Series voltage negtive backword mode is used into circuit；In regulated voltage level combiner circuit, the in-phase end of voltage-stabiliser tube connection resistance R1 with R2, make controllable level VDAC signals and datum VREF by resistance R1 and R2 synthesis in the in-phase end of amplifier；Voltage stabilizing End of oppisite phase connection resistance R4, R5 and R6, controllable level Uo of pipe act on the anti-phase of amplifier by feedback resistance R4, R5 and R6 End, R6 resistance is between the input and output of enhancing output circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710723734.6A CN107562109B (en) | 2017-08-22 | 2017-08-22 | A kind of enhanced controllable voltage stabilizing source device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710723734.6A CN107562109B (en) | 2017-08-22 | 2017-08-22 | A kind of enhanced controllable voltage stabilizing source device |
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| CN107562109A true CN107562109A (en) | 2018-01-09 |
| CN107562109B CN107562109B (en) | 2018-09-07 |
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| CN1913345A (en) * | 2005-08-12 | 2007-02-14 | 西门子公司 | Push-pull amplifier with transformational negative feedback |
| JP2013149147A (en) * | 2012-01-20 | 2013-08-01 | Toyota Motor Corp | Voltage regulator |
| CN203590062U (en) * | 2013-12-13 | 2014-05-07 | 航天长峰朝阳电源有限公司 | Terminal output voltage positive and negative variable-based continuous adjustment circuit |
| CN204103760U (en) * | 2014-11-06 | 2015-01-14 | 航天长峰朝阳电源有限公司 | Positive negative output single channel continuously adjustabe power module |
| CN204836095U (en) * | 2015-07-22 | 2015-12-02 | 成都瑞联电气股份有限公司 | Expansive flows circuit is put to fortune that can export positive negative voltage |
| CN105226970A (en) * | 2015-10-28 | 2016-01-06 | 航天长峰朝阳电源有限公司 | The D.C. regulated power supply that output polarity is changed automatically |
| CN105871180A (en) * | 2016-04-08 | 2016-08-17 | 厦门大学 | High-current CMOS push-pull driving circuit and control method thereof |
-
2017
- 2017-08-22 CN CN201710723734.6A patent/CN107562109B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913345A (en) * | 2005-08-12 | 2007-02-14 | 西门子公司 | Push-pull amplifier with transformational negative feedback |
| JP2013149147A (en) * | 2012-01-20 | 2013-08-01 | Toyota Motor Corp | Voltage regulator |
| CN203590062U (en) * | 2013-12-13 | 2014-05-07 | 航天长峰朝阳电源有限公司 | Terminal output voltage positive and negative variable-based continuous adjustment circuit |
| CN204103760U (en) * | 2014-11-06 | 2015-01-14 | 航天长峰朝阳电源有限公司 | Positive negative output single channel continuously adjustabe power module |
| CN204836095U (en) * | 2015-07-22 | 2015-12-02 | 成都瑞联电气股份有限公司 | Expansive flows circuit is put to fortune that can export positive negative voltage |
| CN105226970A (en) * | 2015-10-28 | 2016-01-06 | 航天长峰朝阳电源有限公司 | The D.C. regulated power supply that output polarity is changed automatically |
| CN105871180A (en) * | 2016-04-08 | 2016-08-17 | 厦门大学 | High-current CMOS push-pull driving circuit and control method thereof |
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| CN107562109B (en) | 2018-09-07 |
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