CN104731152A - Positive and negative symmetrical output power source and medical device thereof - Google Patents
Positive and negative symmetrical output power source and medical device thereof Download PDFInfo
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Abstract
The invention relates to a positive and negative symmetrical output power source which comprises a first fixing feedback unit, a second fixing feedback unit and a second dynamic feedback unit. The first fixing feedback unit conducts sampling on the voltage value of the first voltage output end and feeds the voltage value back to the first feedback adjusting end. The second fixing feedback unit conducts sampling on the voltage value of the second voltage output end and feeds the voltage value back to the second feedback adjusting end. The second dynamic feedback unit feeds the difference value back to the second feedback adjusting end by obtaining the difference value of the superposed voltage value of the first voltage output end and the second voltage output end and the ground potential so that the voltage value of the first voltage output end and the voltage value of the second voltage output end can be made to be symmetrical. The invention further relates to a medical device. The positive and negative symmetrical output power source and the medical device have the following advantages that the symmetry of the output voltage can be adjusted automatically and precisely.
Description
Technical field
The present invention relates to medical equipment, more particularly, relate to a kind of Symmetrical out-put supply and Medical Devices thereof.
Background technology
(namely this power supply has two groups of outputs to Symmetrical power supply, and one group of magnitude of voltage exported just is, another group is negative; The absolute value of two groups of output voltages is equal or proportional) application be very widely, especially the load of high precision telemetry circuit requires high to the symmetry of positive-negative power (i.e. the absolute value of two groups of voltages whether equal or whether meet the ratio of its regulation).Many methods are designed with for Symmetrical power supply.Conventional method for designing has: utilize transformer coupled winding to produce Symmetrical power supply, and adopt independently two circuit modules to realize positive-negative power respectively.Because the parameter of electronic devices and components all also exists discreteness, also variant on the impact of variation of ambient temperature, and the load current the change of divergence of positive-negative power, these factors all can affect symmetry and the stability of positive and negative out-put supply.In the application of high precision telemetry circuit, apply the power supply that Symmetrical degree is low, can supply-voltage rejection ratio be reduced, make output produce larger arithmetic eror, observing and controlling accuracy may be had a strong impact on, after even losing efficacy, brought uncertain disaster consequence.In the prior art, for effectively improving the symmetrical precision of positive-negative power, in order to solve above-mentioned symmetric problem, also there is the situation using potentiometer to finely tune a road or two output voltage.But in this case, need manually to regulate, the output voltage making it can not realize above-mentioned Symmetrical voltage automatically, exactly regulates.
Summary of the invention
The technical problem to be solved in the present invention is, for prior art above-mentioned can not automatically, the defect of regulation output voltage symmetry exactly, provide a kind of can automatically, the Symmetrical out-put supply of regulation output voltage symmetry and Medical Devices thereof exactly.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of Symmetrical out-put supply, has the first voltage output end and the second voltage output end, and described first voltage output end exports positive voltage, and described second voltage output end exports negative voltage; Described Symmetrical out-put supply also has the first feedback regulation end regulating magnitude of voltage on described first voltage output end and the second feedback regulation end regulating magnitude of voltage on described second voltage output end respectively; Also comprise the first fixing feedback unit, the second fixing feedback unit and the second dynamic feedback unit; Described first fixing feedback unit is by sampling to the magnitude of voltage of described first voltage output end and feeding back to described first feedback regulation end; The described second fixing magnitude of voltage of feedback unit to described second voltage output end is sampled and feeds back to described second feedback regulation end or described first feedback regulation end; Described second dynamic feedback unit is by the magnitude of voltage of described first voltage output end and the second voltage output end that obtain superposition and earthy difference, and this difference is fed back to described second feedback regulation end or described first feedback regulation end, make the magnitude of voltage on described first voltage output end and the second voltage output end symmetrical.
Further, also comprise the first dynamic feedback unit, by the decision whether identical with the absolute value of the output voltage of the second voltage output end of more described first voltage output end, it exports and the size of the voltage adjustment signal on described first feedback regulation end or described second feedback regulation end that is added to described first dynamic feedback unit.
Further, described first dynamic feedback unit comprises the first analog-to-digital conversion module, the second analog-to-digital conversion module, Compare Logic array and the first D/A conversion unit; The magnitude of voltage of described first voltage output end is converted to binary data by described first analog-to-digital conversion module; The magnitude of voltage of described second voltage output end is converted to binary data by described second analog-to-digital conversion module; Whether described two binary data are transported to the different input ends of described Compare Logic array respectively, identical by more described binary data, obtain the new data whether binary number of expression two input is identical; Described comparative result is transported to the input end of described first D/A converter module, and the voltage adjustment signal being converted to simulation is transported to described first feedback regulation end or described second feedback regulation end.
Further, when described two binary data being input to Compare Logic array are identical, described Compare Logic array exports the scale-of-two comparative result of complete 1, and the voltage adjustment signal that described first D/A converter module exports is zero.
Further, described first fixing feedback unit and the described second fixing feedback unit carry out dividing potential drop respectively by resistance to the voltage on described first voltage output end and the second voltage output end, and separately the voltage that tie point between its divider resistance obtains are transferred to described first feedback regulation end and the second feedback regulation end respectively.
Further, described second dynamic feedback unit comprises an operational amplifier, the positive input terminal of described operational amplifier is connected on described first voltage output end and the second voltage output end respectively by resistance, its negative input end, by resistance eutral grounding, is also connected with gain control network between its output terminal and its negative input end; The output terminal of described operational amplifier is connected with described second feedback regulation end or described first feedback regulation end.
Further, described gain control network comprises the first resistance, the second resistance and the first electric capacity; Described first resistance is attempted by described operational amplifier negative input end and output terminal; After described second resistance and described first capacitances in series, be attempted by described first resistance.
Further, the magnitude of voltage symmetry on described first voltage output end and the second voltage output end comprises that 1:1 is symmetrical or 2:1 is symmetrical or 1:2 is symmetrical.
The invention still further relates to a kind of Medical Devices, the power supply comprising Medical Devices main body and power for described Medical Devices main body, described power supply is the Symmetrical out-put supply described in above-mentioned any one.
Implement Symmetrical out-put supply of the present invention and Medical Devices thereof, there is following beneficial effect: owing to employing the first fixing feedback unit simultaneously, second fixing feedback unit and the second dynamic feedback unit, wherein, first and second fixing feedback units ensure that the voltage stable output of two voltage output ends, and the second dynamic feedback unit is by comparing the output voltage of two output terminals, its difference is converted to the change in voltage that regulated voltage signal makes voltage follow first voltage output end of the second voltage output end, substantially the automatic of two voltage output ends is achieved, symmetrical adjustment.Further, employ again the first dynamic feedback unit, regulate the voltage of the first voltage output end further, make the adjustment for two output voltages more accurate.So, its can automatically, regulation output voltage symmetry exactly.
Accompanying drawing explanation
Fig. 1 is the structural representation of power supply in Symmetrical out-put supply of the present invention and Medical Devices embodiment thereof;
Fig. 2 is the electrical schematic diagram of Fig. 1;
Fig. 3 is the power supply architecture schematic diagram in described embodiment with the first dynamic feedback unit;
Fig. 4 is the electrical schematic diagram of Fig. 3.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention is further illustrated.
As shown in Figure 1, in Symmetrical out-put supply of the present invention and Medical Devices embodiment thereof, this Symmetrical out-put supply at least comprises the first power module and second source module, these two power modules work respectively and produce respective output voltage, export, for load provides power supply respectively by the first voltage output end and the second voltage output end.In the present embodiment, ideally, the polarity of the voltage that above-mentioned two power modules produce is contrary, the equal or ratio in setting of its absolute value; First voltage output end mouth is arranged on the first power module, the voltage of the first power module generation is exported by it, first power module also comprises the first feedback regulation port, for according to the Signal Regulation applied thereon or control the first power module, it is made to export different magnitudes of voltage at above-mentioned first feedback regulation port.Similarly, second voltage output end mouth is arranged in second source module, the voltage of second source module generation is exported by it, second source module also comprises the second feedback regulation port, for according to the Signal Regulation applied thereon or control second source module, it is made to export different magnitudes of voltage at above-mentioned second feedback regulation port.First fixing feedback unit is connected between the first voltage output end and earth potential, by sampling to the magnitude of voltage on the first voltage output end, obtain regulated voltage signal, and the first feedback regulation end will be fed back to, make the first power module magnitude of voltage that can maintain on the first voltage output end keep stable or remain on the current potential of setting; Second fixing feedback unit is connected between the second voltage output end and earth potential, to the magnitude of voltage sampling on the second voltage output end, obtain another one regulated voltage signal, and by this signal feedback to the second feedback regulation end, make second source module can maintain magnitude of voltage on the second voltage output end.In addition, output regulation signal is not merely the second fixing feedback unit to above-mentioned second feedback regulation end, in the present embodiment, the output signal of the second dynamic feedback unit is equally also connected on above-mentioned second voltage output end, together with the Signal averaging that the above-mentioned second fixing feedback unit feeds back, jointly participate in the adjustment to the magnitude of voltage on above-mentioned second voltage output end.In the present embodiment, second dynamic feedback unit is by the magnitude of voltage on the first voltage output end of obtaining superposition and on the second voltage output end and earthy difference, and this difference is fed back to described second feedback regulation end, make the magnitude of voltage on the first voltage output end and the second voltage output end symmetrical.Like this, while the first fixing feedback unit and the second fixing feedback unit stablize each self-corresponding output voltage, the difference (polarity of these two output voltages is contrary) that second dynamic feedback unit obtains after utilizing two output voltage superpositions, and using after this difference process as the Signal averaging of regulation output voltage to above-mentioned second feedback input end, under making the asymmetric situation of magnitude of voltage exported at two power modules, the magnitude of voltage on the second voltage output end and the magnitude of voltage on the first voltage output end that second source module exports are tending towards symmetry (equal or become to set ratio).
It is worth mentioning that, in the present embodiment, above-mentioned second dynamic feedback unit is not to be connected on above-mentioned second feedback input end, in some cases, the output of above-mentioned second dynamic feedback unit also can be connected on above-mentioned first feedback input end, regulates the output voltage of the first power module.Certainly, in this case, the output just only having the second fixing feedback unit that the second feedback input end connects, and what the first feedback input end connected is the output of the first fixing feedback unit and the second dynamic feedback unit.
Fig. 2 shows the electrical schematic diagram of each several part in the present embodiment except power module.In fig. 2, second dynamic feedback unit comprises an operational amplifier 209, the positive input terminal of operational amplifier 209 is connected on the first voltage output end and the second voltage output end respectively by resistance (207,216,215), its negative input end, by resistance (208) ground connection, is also connected with gain control network between its output terminal and its negative input end; The output terminal of operational amplifier 209 is connected with the second feedback regulation end.This gain control network comprises the first resistance 210, second resistance 211 and the first electric capacity 212; First resistance 210 is attempted by operational amplifier 209 negative input end and output terminal; Second resistance 211 and the first electric capacity 212 are attempted by the first resistance 210 after connecting.In the present embodiment, the parameter by arranging each element in above-mentioned gain control network realizes the symmetry of magnitude of voltage on the first voltage output end and the second voltage output end.Symmetry herein refers to that the polarity of the output voltage of the first voltage output end and the second voltage output end is contrary, but its absolute value is equal or proportional, such as, the magnitude of voltage symmetry on the first voltage output end and the second voltage output end comprises that 1:1 is symmetrical or 2:1 is symmetrical or 1:2 is symmetrical.Suppose that the output voltage of the first voltage output end is+12V, in different situations, the output voltage of the second voltage output end can be-12V ,-6V or-24V.
In the present embodiment, the resistance that above-mentioned first fixing feedback unit and the second fixing feedback unit fall down to the ground respectively by two series connection carries out dividing potential drop to the voltage on the first voltage output end and the second voltage output end, and the partial pressure value obtained is transferred to respectively described first feedback regulation end and the second feedback regulation end.Specific in Fig. 2, the first fixing feedback unit comprises resistance 201 and resistance 202; Second fixing feedback unit comprises resistance 203 and resistance 204.
On overall, in the present embodiment, operational amplifier 209, resistance 208 and resistance 210 is utilized to realize relatively and amplify.Operational amplifier 209 outputs signal the FEEDBACK CONTROL as second source module, to realize real-time, automatic tracking adjustment.First electric capacity 212 and the second resistance 211 improve stability and the reliability of operational amplifier 209.Resistance 201 ~ 204 realizes the output voltage setting of the first power module and second source module.That is:
Wherein, V
rEF1it is the FEEDBACK CONTROL reference voltage of the first power module; V
rEF2for the FEEDBACK CONTROL reference voltage of second source module; VPP is the output voltage of the first voltage output end mouth; VNN is the output voltage of the second voltage output end mouth.The parameter of resistance 201-204, according to actual output voltage and reference voltage value, can set by above-mentioned formulae discovery.
In addition, in fig. 2, resistance 216 and resistance 215 realize the voltage sampling of the output voltage VPP of the first voltage output end mouth and the output voltage VNN of the second voltage output end mouth respectively.First power module of output voltage VPP and the second source module of voltage VNN are two-way independently power modules.By sampling generating positive and negative voltage (in the present embodiment, VPP is positive voltage, and VNN is negative voltage) symmetry error signal, make to set up contact between two-way power supply.Error signal produces feedback control signal to the second source module producing negative voltage after operational amplifier process.According to feedback control signal size or injection or extract electric current, automatically the inching of the negative pressure VNN magnitude of voltage that second source module exports is realized, VNN magnitude of voltage is followed the tracks of and synchronous vpp voltage value, thus achieve the symmetric deviation adjusting of real-time, automatic positive and negative height.
Due to the discreteness of electronic devices and components parameter, or variation of ambient temperature, or load current characteristic difference, there is deviation in the negative voltage VNN symmetry that the positive voltage VPP that the first power module may be caused to export and second source module export.VPP and VNN by two substitutional resistances 215 and resistance 216 sample first power module export positive voltage VPP and second source module export negative voltage VNN produce voltage symmetry error signal VPP+VNN, deviation (error) signal that positive/negative-pressure produces is through operational amplifier 209, biasing resistor 208 and the first resistance 210, achieve the amplification of generating positive and negative voltage deviation signal, its gain is
the signal of the deviation that generating positive and negative voltage produces after operational amplifier 209 is nursed one's health is exaggerated, amplified signal injects the second feedback regulation end producing negative voltage VNN second source module by resistance R213, according to circuit Thevenin theorem, the effect of signals injected by resistance 219 to the change of the back coupling control end electric current of second source module negative voltage VNN, thus realizes second source module and exports adjusting from motion tracking is symmetrical of the positive voltage VPP that negative voltage VNN and the first power module export.The resize ratio of negative voltage VNN adjusts by resistance 219.By adjusting the first resistance 210, the symmetrical precision of output voltage can be controlled, by adjusting resistance 219, the setting range of output voltage can be controlled.The parameter value of each resistance of choose reasonable, effectively can improve the degree of accuracy of generating positive and negative voltage symmetry.
In fig. 2, the first power module and second source module arrange the output voltage of power module respectively by external resistance.Solve under setting resistance, the symmetry problem of the fixed positive voltage that the first power module exports and the fixed negative voltage that second source module exports.The circuit that maximized exports the dirigibility of positive voltage and negative voltage, and the range of application of positive voltage and the automatic symmetric circuit of negative voltage.Obtain scale by setting resistance 219 with the parameter value of resistance 204, symmetrical precision can be set.
Under certain situation in the present embodiment, may require to align when voltage and negative voltage are put into effect and monitor and do to correct adjustment, to realize the automatic adjustment of system and to control flexibly.Now, the above-mentioned negative output voltage that only regulates just may can not realize its object to the method for positive output magnitude of voltage symmetry.For this reason, this power supply on the basis of the structure of Fig. 1, can also increase by the first dynamic feedback unit, refers to Fig. 3.In the present embodiment, by comparing the decision whether identical with the absolute value of the output voltage of the second voltage output end of the first voltage output end, it exports and the size of the voltage adjustment signal on the first feedback regulation end that is added to this first dynamic feedback unit.Namely the output of above-mentioned first dynamic feedback unit is connected to above-mentioned first feedback regulation end, the whether identical feedback signal deciding to export of its absolute value according to the voltage of two voltage output ends, when the absolute value of voltage of two voltage output ends is identical, its feedback signal exported is zero, does not namely participate in the adjustment to the first voltage module output voltage; When the two is not identical, output feedback signal participates in the adjustment to magnitude of voltage on the first voltage output end, and difference is more, and the feedback signal of output is larger, also larger to the amplitude of accommodation of the magnitude of voltage on the first voltage output end.
Similarly, the output of the first dynamic feedback unit is also not merely be connected to the first feedback input end.In the present embodiment, in some cases, the output terminal of above-mentioned first dynamic feedback unit also can need to be connected to the second feedback input end depending on it.Such as, in the present embodiment, may occur the second feedback input end being connected with three inputs, namely the output of the second fixing feedback unit, the first dynamic feedback unit and the second dynamic feedback unit is all connected to above-mentioned second feedback input end, and the first feedback input end is only connected with the output of the first fixing feedback unit.
Fig. 4 shows above-mentioned first dynamic feedback unit concrete structure in the present embodiment.In the diagram, the first dynamic feedback unit comprises the first analog-to-digital conversion module, the second analog-to-digital conversion module, Compare Logic array and the first D/A conversion unit; The magnitude of voltage of the first voltage output end absolute value of this magnitude of voltage (specifically, be) is converted to binary data by the first analog-to-digital conversion module; The magnitude of voltage of the second voltage output end absolute value of this magnitude of voltage (specifically, be) is converted to binary data by the second analog-to-digital conversion module; Whether described two binary data are transported to the different input ends of Compare Logic array respectively, identical by comparing binary data, obtain the new data whether binary number of expression two input is identical; Comparative result is transported to the input end of the first D/A converter module, and the first feedback regulation end is stated in the voltage adjustment signal conveying being converted to simulation.It is worth mentioning that, in the diagram, thicker line represents long numeric data bus, at above-mentioned first analog-to-digital conversion module, between the second data conversion module and Compare Logic array, between Compare Logic array and the first D/A converter module, signal transmits in the binary data bus of multi-bit parallel.The figure place of these data buss is relevant with the figure place of analog-to-digital conversion module, D/A converter module, and such as, analog-to-digital conversion module is 8 in the diagram, so the bus of binary data transmission is also 8; When analog-to-digital conversion module is 16 time, the bus of data transmission is also 16.In the present embodiment, whether two input data are compared in the step-by-step of Compare Logic array one by one identical, when two binary data being input to Compare Logic array are identical, Compare Logic array exports the scale-of-two comparative result of complete 1, and the voltage adjustment signal that the first D/A converter module exports is zero.And when the data on a certain position are not identical, what this in comparative result of Compare Logic array exported is 0, and the first analog-to-digital conversion module is the data position of 0 according to this, and the simulating signal exporting different size feeds back to the first feedback port; When the data of above-mentioned first D/A converter module of input have multiple be 0 position, the first D/A converter module is these Signal averaging corresponding respectively, then exports.
In the diagram, owing to adding the first analog-to-digital conversion module and the second analog-to-digital conversion module, Compare Logic array and the first D/A converter module, the numerical value (absolute value) of sampled respectively by the first analog-to-digital conversion module and the second analog-to-digital conversion module the positive voltage VPP of the first power module output and the negative voltage VNN of second source module output.By the analog quantity of continuous print output voltage, with minimum quantization unit
be converted into digital quantity signal, and the result binary code after quantizing is indicated.The binary code that first analog-to-digital conversion module and the second analog-to-digital conversion module export is exactly the conversion results to the voltage VNN that output voltage VPP and the second source module of the first power module export.8 the binary code digital quantity signals quantized respectively, realize data consistency/symmetry by logic with OR circuit function and judge.Inputting identical output is 1, and exporting different output is 0.Can realize judging that whether the state of each input end is identical by a series of logic gate.When input state is all identical, when namely two-way voltage value is consistent, without the need to additionally injecting back coupling control signal, correction adjustment is carried out to the first power module.When input state is different, pass through logical AND gate, 8 the code digit amount signals quantized respectively by first power module voltage VPP and second source module 306 voltage VNN produce and can quantize deviation, and by the first digital to analog converter, convert the digital deflection quantizing to draw to analog quantity, corresponding voltage adjustment signal is formed with this analog quantity, and injected the first FEEDBACK CONTROL end of the first power module by resistance, thus the feedback and tracking realized the first power module output voltage VPP and adjustment automatically.Be aided with voltage sampling resistor (first, second fixing feedback unit) and the operational amplifier (the second dynamic feedback unit) of the first power module and second source module again, achieve and the symmetry of the first power module output voltage VPP and second source module output voltage VNN is adjusted, finally achieve the adjustment of implementing monitoring to whole power-supply system and automatic Symmetrical precision.In comparatively widespread use, except the automatic symmetry control overflow of positive voltage and negative voltage, also according to the requirement of circuit to different positive voltages and negative voltage, by setting operational amplifier external device parameter etc., the multiplying power alignment of output voltage can be realized.For example, 1:1 is symmetrical, 2:1 is symmetrical, 1:2 is symmetrical.
In the present embodiment, this Symmetrical out-put supply is with the design comparatively simplified, achieve and reach automatically simultaneously controlling of two groups of output voltages with less components and parts, its have control in real time automatically, high symmetry regulates, reliable and stable, the anti-interference feature such as by force, can realize automatically regulating in real time, high voltage symmetry precision can be ensured again.Meanwhile, also by configuration analog to digital converter and logic gate chain of circuits, add the dirigibility real-time control of positive voltage and negative voltage and logical relation being judged to negative output voltage value.
In a word, in the present embodiment, utilize the deviation voltage contact of setting up between the output voltage of positive and negative two-way power supply, make the input signal of automatic symmetrical regulating circuit be taken at positive and negative deviation voltage.Two-way positive-negative power module can adopt principal and subordinate link mode, and the feedback control signal utilizing deviation voltage to produce regulates the output voltage of power module automatically, makes its adjustment Symmetrical deviation automatically.The real-time realizing exporting the symmetrical precision of generating positive and negative voltage controls, and circuit is simple, real-time.Substantially increase the precision and stability of positive-negative power circuit.Raising circuit reliability is also highly profitable.
In addition, in the present embodiment, also relate to a kind of Medical Devices, the power supply that these Medical Devices comprise Medical Devices main body and power for described Medical Devices main body, described power supply is exactly above-mentioned Symmetrical out-put supply.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (9)
1. a Symmetrical out-put supply, has the first voltage output end and the second voltage output end, and described first voltage output end exports positive voltage, and described second voltage output end exports negative voltage; Described Symmetrical out-put supply also has the first feedback regulation end regulating magnitude of voltage on described first voltage output end and the second feedback regulation end regulating magnitude of voltage on described second voltage output end respectively; It is characterized in that, also comprise the first fixing feedback unit, the second fixing feedback unit and the second dynamic feedback unit; Described first fixing feedback unit is by sampling to the magnitude of voltage of described first voltage output end and feeding back to described first feedback regulation end; The described second fixing magnitude of voltage of feedback unit to described second voltage output end is sampled and feeds back to described second feedback regulation end or described first feedback regulation end; Described second dynamic feedback unit is by the magnitude of voltage of described first voltage output end and the second voltage output end that obtain superposition and earthy difference, and this difference is fed back to described second feedback regulation end or described first feedback regulation end, make the magnitude of voltage on described first voltage output end and the second voltage output end symmetrical.
2. Symmetrical out-put supply according to claim 1, it is characterized in that, also comprise the first dynamic feedback unit, by the decision whether identical with the absolute value of the output voltage of the second voltage output end of more described first voltage output end, it exports and the size of the voltage adjustment signal on described first feedback regulation end or described second feedback regulation end that is added to described first dynamic feedback unit.
3. Symmetrical out-put supply according to claim 2, is characterized in that, described first dynamic feedback unit comprises the first analog-to-digital conversion module, the second analog-to-digital conversion module, Compare Logic array and the first D/A conversion unit; The magnitude of voltage of described first voltage output end is converted to binary data by described first analog-to-digital conversion module; The magnitude of voltage of described second voltage output end is converted to binary data by described second analog-to-digital conversion module; Whether described two binary data are transported to the different input ends of described Compare Logic array respectively, identical by more described binary data, obtain the new data whether binary number of expression two input is identical; Described comparative result is transported to the input end of described first D/A converter module, and the voltage adjustment signal being converted to simulation is transported to described first feedback regulation end or described second feedback regulation end.
4. Symmetrical out-put supply according to claim 3, it is characterized in that, when described two binary data being input to Compare Logic array are identical, described Compare Logic array exports the scale-of-two comparative result of complete 1, and the voltage adjustment signal that described first D/A converter module exports is zero.
5. Symmetrical out-put supply according to claim 1, it is characterized in that, described first fixing feedback unit and the described second fixing feedback unit carry out dividing potential drop respectively by resistance to the voltage on described first voltage output end and the second voltage output end, and separately the voltage that tie point between its divider resistance obtains are transferred to described first feedback regulation end and the second feedback regulation end respectively.
6. Symmetrical out-put supply according to claim 1, it is characterized in that, described second dynamic feedback unit comprises an operational amplifier, the positive input terminal of described operational amplifier is connected on described first voltage output end and the second voltage output end respectively by resistance, its negative input end, by resistance eutral grounding, is also connected with gain control network between its output terminal and its negative input end; The output terminal of described operational amplifier is connected with described second feedback regulation end or described first feedback regulation end.
7. Symmetrical out-put supply according to claim 6, is characterized in that, described gain control network comprises the first resistance, the second resistance and the first electric capacity; Described first resistance is attempted by described operational amplifier negative input end and output terminal; After described second resistance and described first capacitances in series, be attempted by described first resistance.
8. Symmetrical out-put supply according to claim 1, is characterized in that, the magnitude of voltage symmetry on described first voltage output end and the second voltage output end comprises that 1:1 is symmetrical or 2:1 is symmetrical or 1:2 is symmetrical.
9. Medical Devices, the power supply comprising Medical Devices main body and power for described Medical Devices main body, is characterized in that, described power supply is the Symmetrical out-put supply as described in claim 1-8 any one.
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| CN105468079A (en) * | 2015-12-30 | 2016-04-06 | 沈阳东软医疗***有限公司 | Two-path symmetrical-output adjustable power source |
| CN105468079B (en) * | 2015-12-30 | 2017-05-31 | 沈阳东软医疗***有限公司 | A kind of double-pass symmetric exports regulated power supply |
| US10270340B2 (en) | 2015-12-30 | 2019-04-23 | Shenyang Neusoft Medical Systems Co., Ltd. | Two-path symmetrical-output adjustable power supply |
| CN106618633A (en) * | 2016-12-27 | 2017-05-10 | 飞依诺科技(苏州)有限公司 | Control method and system for ultrasonic equipment |
| CN106618633B (en) * | 2016-12-27 | 2020-06-09 | 飞依诺科技(苏州)有限公司 | Control method and system of ultrasonic equipment |
| CN113311900A (en) * | 2021-04-21 | 2021-08-27 | 聚融医疗科技(杭州)有限公司 | High-precision positive-negative symmetrical power supply system and working method thereof |
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|---|---|
| CN104731152B (en) | 2016-08-24 |
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