CN102882366A - Ripple power supply device and method for providing direct-current voltage with ripples - Google Patents
Ripple power supply device and method for providing direct-current voltage with ripples Download PDFInfo
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Abstract
The invention belongs to the technical field of power supply circuits, and discloses a ripple power supply device and a method for providing a direct-current voltage with ripples. The ripple power supply device comprises a voltage stabilizing chip of a power supply and a voltage stabilizing circuit, wherein a control voltage is applied to a control voltage input end of the voltage stabilizing circuit, so that the output voltage of the voltage stabilizing chip of the power supply can be adjusted; and when the control voltage consists of direct-current voltage signals and ripple signals, both of the ripple signals and the direct-current voltage signals are transmitted to a voltage feedback end of the voltage stabilizing chip of the power supply by the voltage stabilizing circuit, so that the direct-current voltage with the ripple can be acquired at the voltage output end of the voltage stabilizing chip of the power supply. According to the ripple power supply device and the method for providing the direct-current voltage with the ripples, the direct-current voltage overlapped with the ripple voltage can be acquired at the voltage output end when the ripple signals and the direct-current voltage signals are both applied to the voltage feedback end due to the characteristic that the output voltage of the voltage stabilizing chip of the power supply is controlled by the voltage feedback end; the output voltage has relatively high loading capacity; and the overlapped ripple voltage can be controlled in frequency and amplitude, thereby meeting different test requirements.
Description
Technical field
The invention belongs to the power circuit technical field, more specifically, relate to a kind of ripple power source device and method with the direct voltage of ripple is provided.
Background technology
When circuit performance is assessed, usually need measurement circuit and electronic equipment to the antijamming capability of power supply ripple.This just needs a kind of power supply with the interference signal composition, and it can provide the direct voltage with ripple, and requires its voltage that provides to possess certain load capacity, and amplitude and the frequency of ripple can change as required simultaneously.In the prior art, when using the instruments such as signal generator or comprehensive tester that this direct voltage with ripple is provided, the voltage that provides often load capacity is inadequate; If use power source special to cause again testing cost too high.
Summary of the invention
The technical problem to be solved in the present invention is, for the problem that the voltage belt loading capability is inadequate and cost is high that exists when the direct voltage that provides with ripple in the prior art, the ripple power source device that provide a kind of and realize conveniently, cost is low and load capacity is strong and method with the direct voltage of ripple is provided.
The technical problem to be solved in the present invention is achieved by the following technical programs: a kind of ripple power source device is provided, is used for providing the direct voltage with ripple, described ripple power source device comprises power supply voltage stabilizing chip and voltage stabilizing circuit; The control voltage input end of described voltage stabilizing circuit be applied with control voltage, to regulate the output voltage of described power supply voltage stabilizing chip:
When described control voltage is d. c. voltage signal and ripple signal, described voltage stabilizing circuit transmits ripple signal and d. c. voltage signal simultaneously to the pressure feedback port of described power supply voltage stabilizing chip, obtains described direct voltage with ripple with the voltage output end at described power supply voltage stabilizing chip.
In above-mentioned ripple power source device, described voltage stabilizing circuit is comprised of sampling partial pressure unit, amplifying unit and comparison regulon, wherein:
Described sampling partial pressure unit is used for the Voltage-output of described power supply voltage stabilizing chip is carried out the dividing potential drop sampling and obtains the first branch pressure voltage, described amplifying unit is used for amplifying the first branch pressure voltage of described sampling partial pressure unit, d. c. voltage signal and ripple signal that described relatively regulon is used for applying based on described control voltage input end are regulated the voltage ratio of described sampling partial pressure unit with the comparative result of the first branch pressure voltage that amplifies through described amplifying unit, obtain described direct voltage with ripple with the voltage output end at described power supply voltage stabilizing chip.
In above-mentioned ripple power source device, described sampling partial pressure unit is comprised of the first resistance, the second resistance and adjustment pipe, the first end of described the first resistance connects the voltage output end of described power supply voltage stabilizing chip, first end that the second end connects respectively described adjustment pipe and the pressure feedback port of described power supply voltage stabilizing chip, the first end of described the second resistance connects the second end, the second end ground connection of described adjustment pipe, and the 3rd end of described adjustment pipe is connected to receive described relatively regulon to the adjusting of the voltage ratio of described sampling partial pressure unit with described relatively regulon.
In above-mentioned ripple power source device, described adjustment pipe is NPN type triode or N-type field effect transistor.
In above-mentioned ripple power source device, described amplifying unit is comprised of operational amplifier, the 3rd resistance and the 4th resistance, the input of described operational amplifier is described the first branch pressure voltage that the sampling of described sampling partial pressure unit dividing potential drop obtains, the first end of the inverting input of described operational amplifier and described the 3rd resistance and the second end of the 4th resistance is connected, output is connected with the second end of described the 3rd resistance.
In above-mentioned ripple power source device, described relatively regulon comprises operational amplifier and the 7th resistance, and the inverting input of described operational amplifier connects the output of described amplifying unit, in-phase input end is that described control voltage input end, output are connected with described sampling partial pressure unit through the 7th resistance.
In above-mentioned ripple power source device, described relatively regulon comprises voltage comparator and the 7th resistance, and the inverting input of described voltage comparator connects the output of described amplifying unit, in-phase input end is that described control voltage input end, output are connected with described sampling partial pressure unit through the 7th resistance.
According to a further aspect in the invention, provide a kind of ripple power source device that method with the direct voltage of ripple is provided, described ripple power source device comprises power supply voltage stabilizing chip and voltage stabilizing circuit, the control voltage input end of described voltage stabilizing circuit be applied with control voltage, to regulate the output voltage of described power supply voltage stabilizing chip, wherein:
When described control voltage is d. c. voltage signal and ripple signal, described voltage stabilizing circuit transmits ripple signal and d. c. voltage signal simultaneously to the pressure feedback port of described power supply voltage stabilizing chip, obtains described direct voltage with ripple with the voltage output end at described power supply voltage stabilizing chip.
In above-mentioned ripple power source device provided method with the direct voltage of ripple, the step that obtains described direct voltage with ripple at the voltage output end of described power supply voltage stabilizing chip comprised following substep:
Voltage-output to described power supply voltage stabilizing chip carries out the dividing potential drop sampling, obtains the first branch pressure voltage;
Amplify the first branch pressure voltage that the dividing potential drop sampling obtains;
The comparative result of the d. c. voltage signal that applies based on described control voltage input end and the first branch pressure voltage of ripple signal and amplification is regulated the voltage ratio of dividing potential drop sampling; And
Control the voltage output end of described power supply voltage stabilizing chip according to the voltage ratio after regulating, so that the output of described power supply voltage stabilizing chip is with the direct voltage of ripple.
Implement the present invention and can obtain following beneficial effect: among the present invention, utilize the output voltage of power supply voltage stabilizing chip to be subjected to the characteristics of pressure feedback port control, after its pressure feedback port applies ripple signal (or being called the ripple voltage signal) and d. c. voltage signal simultaneously, can obtain being superimposed with the ripple signal direct voltage of (or being called ripple voltage) at the output of power supply voltage stabilizing chip; This output voltage has than the strong band loading capability, and frequency and the amplitude of the ripple voltage that superposes are controlled, thereby can satisfy different testing requirements; Ripple power source device line design provided by the present invention is simple, cost is low and be easy to realization.
Description of drawings
Below with reference to the drawings and specific embodiments the present invention is described in further details.In the accompanying drawing:
Fig. 1 is the block diagram according to ripple power source device of the present invention;
Fig. 2 a is the block diagram of the ripple power source device of the embodiment of the invention 1;
Fig. 2 b is the circuit diagram of the ripple power source device of the embodiment of the invention 1;
Fig. 2 c is the schematic diagram of the output voltage of ripple power source device when the control voltage input end only applies d. c. voltage signal of the embodiment of the invention 1;
Fig. 2 d is the schematic diagram of the output voltage of ripple power source device when the control voltage input end applies d. c. voltage signal and ripple signal simultaneously of the embodiment of the invention 1;
Fig. 3 a is the circuit diagram according to the ripple power source device of the embodiment of the invention 2;
Fig. 3 b is the schematic diagram of the output voltage of ripple power source device when the control voltage input end only applies d. c. voltage signal of the embodiment of the invention 2;
Fig. 3 c is the schematic diagram of the output voltage of ripple power source device when the control voltage input end applies d. c. voltage signal and ripple signal simultaneously of the embodiment of the invention 2;
Fig. 4 is the circuit diagram according to the ripple power source device of the embodiment of the invention 3; And
Fig. 5 is that ripple power source device according to the present invention provides the flow chart with the direct voltage of ripple.
Embodiment
For making purpose of the present invention, technical scheme and effect clearer, below with reference to the drawings and specific embodiments the present invention is described in further details.It should be understood that following examples only in order to explaining the present invention, and the present invention is not done any restriction.
As shown in Figure 1, Fig. 1 is the block diagram of ripple power source device of the present invention.This ripple power source device comprises power supply voltage stabilizing chip 10 and a voltage stabilizing circuit 20; The control voltage input end of voltage stabilizing circuit 20 is applied with control voltage, to regulate the output voltage of power supply voltage stabilizing chip 10.In the present invention, the control voltage that the control voltage input end of voltage stabilizing circuit 20 applies is ripple signal and d. c. voltage signal, this moment, voltage stabilizing circuit 20 transmitted this ripple signal and d. c. voltage signal to the pressure feedback port of power supply voltage stabilizing chip 10 simultaneously, obtained direct voltage with ripple with the voltage output end at power supply voltage stabilizing chip 10.The used power supply voltage stabilizing chip 10 of the present invention is feedback-type power supply voltage stabilizing chip, and the voltage of its output is controlled by pressure feedback port.After applying in advance the ripple signal at pressure feedback port, the ripple signal of input can superpose with the direct voltage of its voltage output end, this moment, the output voltage that produces had frequency and the waveform identical with the ripple signal of input, have simultaneously with apply the ripple signal before the center voltage that equates of direct current output.This output voltage had both satisfied the load capacity requirement, had again the required interference signal of measurement circuit performance.
Shown in Fig. 2 a and 2b, it is respectively logic diagram and the circuit diagram of the ripple power source device of the embodiment of the invention 1; Wherein, power supply voltage stabilizing chip 10 is linear voltage regulator (LVR) U11.Vo is the voltage output end (being the voltage output end of ripple power source device) of LVR U11, and C1 is power supply output filtering total capacitance, is comprised of electrochemical capacitor and ceramic condenser; Vin be LVR U11 direct current supply input (being the direct current supply input of ripple power source device), VFR is the pressure feedback port of LVR U11.Voltage stabilizing circuit 20 is comprised of sampling partial pressure unit 201, amplifying unit 202 and comparison regulon 203, and it is used for regulating the output voltage of LVRU11.Wherein, sampling partial pressure unit 201 is used for the Voltage-output of LVR U11 is carried out the dividing potential drop sampling, and obtain the first branch pressure voltage, amplifying unit 202 is used for amplifying the first branch pressure voltage that the sampling of sampling partial pressure unit 201 dividing potential drops obtains, relatively regulon 203 is used for regulating the voltage ratio of sampling partial pressure unit 201 based on the control voltage of control voltage input end with the comparative result of the first branch pressure voltage that amplifies through amplifying unit 202, thereby regulates the output voltage of power supply voltage stabilizing chip 10.In this embodiment, the control voltage input end of voltage stabilizing circuit 20 is applied with d. c. voltage signal and ripple signal simultaneously, voltage stabilizing circuit 20 can transmit the ripple signal to the pressure feedback port VFB of LVR U11, and obtains direct voltage with ripple at the voltage output end Vo of LVR U11.How below will to specify by apply the ripple signal at the control voltage input end and obtain direct voltage with ripple at voltage output end.
With reference to figure 2b, sampling partial pressure unit 201 is comprised of the first resistance R 1, the second resistance R 2 and triode Q1.The first end of the first resistance R 1 connects the voltage output end Vo of LVR U11, the collector electrode of the second end difference connecting triode Q1 and the pressure feedback port VFB of LVR U11, the emitter of the first end connecting triode Q1 of the second resistance R 2, the second end ground connection, the base stage of triode Q1 is connected with comparison regulon 201, thereby receives the relatively adjusting of the voltage ratio of 203 pairs of samplings of regulon partial pressure unit 201.LVR U11 is after partial pressure unit 201 is connected with sampling, its output voltage U o=Ic*R1+VFB, and wherein Ic is the collector current of triode Q1, and VFB is the reference voltage of LVR U11, and R1 is the resistance value of the first resistance.Can find out from the calculating formula of output voltage, can regulate the output voltage (being the output voltage of ripple power source device of the present invention) of LVR U11 by regulating Ic.Here need to prove that the first branch pressure voltage that said sampling partial pressure unit 201 dividing potential drops sampling obtains among the present invention is the voltage on the second resistance R 2: U
R2=Ic*R2.
Amplifying unit 202 is comprised of operational amplifier U2, the 3rd resistance R 3 and the 4th resistance R 4, two inputs of operational amplifier U2 connect respectively the two ends of the second resistance R 2, in other words, the input of operational amplifier U2 is the first branch pressure voltage that the sampling of sampling partial pressure unit 201 dividing potential drops obtains; On the other hand, the second end of the first end of the inverting input of operational amplifier U2 and the 3rd resistance R 3 and the 4th resistance R 4 is connected, output is connected with the second end of the 3rd resistance R 3.Operational amplifier U2 can carry out to a certain degree method to the first branch pressure voltage, and multiplication factor is determined by the 3rd resistance R 3 and the 4th resistance R 4.In illustrated voltage stabilizing circuit, U
U2=Ic*R2* (1+R3/R4).
Relatively regulon 203 comprises operational amplifier U3 and the 7th resistance R 7, and the inverting input of operational amplifier U3 connects the output of amplifying unit, also is U
3-=Ic*R2* (1+R3/R4); Its in-phase input end is the control voltage input end, and in this embodiment, in-phase input end is applied with d. c. voltage signal VDC and ripple signal VAC simultaneously; Its output is connected with sampling partial pressure unit 201 through the 7th resistance R 7.Relatively regulon 203 can compare the output voltage of operational amplifier U2 and the control voltage of operational amplifier U3 in-phase input end input, and pass through the electric current I c that it compares output voltage and the 7th resistance R 7 adjusting triode Q1, thereby change the voltage ratio of sampling partial pressure unit 201.Illustrated relatively regulon 203 also comprise be arranged on in-phase input end, as the capacitor C 2 of ripple coupling capacitance, and be arranged on in-phase input end, as the 5th resistance R 5 and the 6th resistance R 6 of pull down resistor.
In embodiment 1, because the closed-loop control effect of triode Q1, the second resistance R 2, operational amplifier U2 and U3, U3-=U3+, hence one can see that Ic=(VDC+VAC)/(1+R3/R4).At this moment, in the constant situation of U3+ input voltage, electric current between the CE of the first resistance R 1, the second resistance R 2 and triode Q1 is constant, and namely the tracking relationship of the output voltage U o of the sampling voltage of pressure feedback port VFB and voltage output end is set up, and therefore obtains the following computing formula of Uo:
Uo=(VDC+VAC)/(R2*(1+R3/R4))*R?1+VFB
=VAC*R1/(R2*(1+R3/R4))+VDC*R1/R2*(1+R3/R4))+VFB
In above-mentioned computing formula, VDC*R1/R2* (1+R3/R4))+VFB is direct voltage, also is the output center voltage of direct voltage with ripple required for the present invention.Under the condition that voltage stabilizing circuit 20 each element are selected, just can change the center voltage value of the output voltage of ripple power source device by the voltage that changes control voltage input end VDC.VAC*R1/ (R2* (1+R3/R4)) is the ripple composition of output voltage, is fluctuation voltage.In the situation that voltage stabilizing circuit 20 each element are selected, the voltage amplitude that changes control voltage input end VAC has just changed the fluctuation range of output voltage, changes the waveform that its wave function has just changed the output voltage of ripple power source device.For example, if VAC is sinusoidal wave, then the direct voltage with ripple of output also is sinusoidal wave.
Adopt the minimum of the obtainable output voltage with ripple of the ripple power source device of embodiment 1 identical with the reference voltage of LVR U11, peak is near the DC input voitage Uin of the direct current supply electrode input end of LVR U11.
Among the embodiment 1, LVR U11 is that LM2941T, Q1 are 2SK1824, and it is that 4.7K Ω, R2 are that 22 Ω, R3 are that 47K Ω, R4 are that 1K Ω, R5 are that 100K Ω, R6 are that 10K Ω, R7 are that 10K Ω and C2 are 100 μ F that U2, U3 are LM324, R1.The output of ripple power source device connects the 300mA load, and its input voltage Uin is 12V.Shown in Fig. 2 c, the figure illustrates at the control voltage input end and apply the 1.5V direct voltage and the waveform of the output voltage that do not apply ripple signal time test obtains.Apparently, the output voltage waveforms of this moment is the direct current output waveform of ripple-free (or state no interference signal), and its magnitude of voltage is 8.1V, possesses certain load capacity.Shown in Fig. 2 d, the waveform of the output voltage that it obtains for test when the control voltage input end applies 1.5V direct voltage and 220mV, 100Hz Sinusoidal Ripple signal simultaneously.The output voltage waveforms of this moment is similarly sinusoidal wave, is that superposeed 100Hz, fluctuating range of direct voltage at the 8.1V of Fig. 2 c is the output voltage of the ripple signal of 1V (being △ U=1V).Can find out from the comparative result of Fig. 2 c and 2d, the ripple power source device that adopts this embodiment to provide really can provide have than the strong band loading capability, with the direct voltage of ripple, and the parameters such as the center voltage of this output voltage, fluctuation range, ripple frequency all can be by realizing the VDC of control voltage input end and the adjusting of VAC.
Shown in Fig. 3 a, Fig. 3 a is the circuit diagram of the ripple power source device of the embodiment of the invention 2.As different from Example 1, the power supply voltage stabilizing chip 10 of this embodiment adopts DC-DC switching regulator (DC-DC) U21, the physical circuit design of voltage stabilizing circuit is then substantially the same manner as Example 1, consisted of by sampling partial pressure unit, amplifying unit and comparison regulon equally, except the BOOT end of the DC-DC U21 of embodiment 2 through being connected with between the voltage output end of the 3rd capacitor C 3 and diode D1 ground connection and the first resistance R 1 and DC-DC U1 the power inductance L1.Because the circuit design of power inductance L1, the 3rd capacitor C 3 and diode D1 is only relevant with the driving voltage of DC-DC U21, does not affect the control of output output voltage, therefore the voltage stabilizing circuit among the embodiment 2 is not repeated in this description herein.Among the embodiment 2, the computing formula of the output voltage of the voltage output end of DC-DC U21 is similarly following calculating formula:
Uo=(VDC+VAC)/(R2*(1+R3/R4))*R1+VFB
＝VAC*R1/(R2*(1+R3/R4))+VDC*R1/R2*(1+R3/R4))+VFB
In above-mentioned computing formula, VDC*R1/R2* (1+R3/R4))+VFB is direct voltage, VAC*R1/ (R2* (1+R3/R4)) is the ripple composition of output voltage.In the situation that each element of voltage stabilizing circuit is selected, the attributes such as the center voltage value that the VDC of change control voltage input end and VAC get final product corresponding change output voltage U o, frequency, fluctuation range.
Among the embodiment 2, DC-DC U21 is that TPS5450, Q1 are 2SK1824, and it is that 4.7K Ω, R2 are that 22 Ω, R3 are that 47K Ω, R4 are that 1K Ω, R5 are that 100K Ω, R6 are that 10K Ω, R7 are that 10K Ω and C2 are 100 μ F that U2, U3 are LM324, R1.The output of ripple power source device connects the 1.5A load, and its input voltage Uin is 15V.Shown in Fig. 3 b, the waveform of the output voltage that test obtained when it did not apply the ripple signal for applying the 2.7V direct voltage at the control voltage input end.Apparently, the output voltage waveforms of this moment is the direct current output waveform of ripple-free (or state no interference signal), and its magnitude of voltage is 13.2V, possesses certain load capacity.Shown in Fig. 3 c, the waveform of the output voltage that it obtains for test when the control voltage input end applies 2.7V direct voltage and 220mV, 4000Hz Sinusoidal Ripple signal simultaneously.The output voltage waveforms of this moment is similarly sinusoidal wave, is that superposeed 4000Hz, fluctuating range of direct voltage at the 13.2V of Fig. 3 b is the output voltage of the ripple signal of 1V (being △ U=1V).Can find out from the comparative result of Fig. 3 b and 3c, the ripple power source device that adopts this embodiment to provide really can provide have than the strong band loading capability, with the direct voltage of ripple, and the parameters such as the center voltage of this output voltage, fluctuation range, ripple frequency all can be by realizing the VDC of control voltage input end and the adjusting of VAC.
As shown in Figure 4, Fig. 4 is the circuit diagram of the ripple power source device of the embodiment of the invention 3.This embodiment adopts DC-DC switching regulator (DC-DC) U31 as power supply voltage stabilizing chip equally, and the physical circuit of voltage stabilizing circuit design is also substantially the same manner as Example 2, except the BOOT end of DC-DC U21 no longer through the 3rd capacitor C 3 and diode D1 ground connection.Because the circuit design of the 3rd capacitor C 3 and diode D1 is only relevant with the driving voltage of DC-DC U21, does not affect the control of output output voltage, therefore the voltage stabilizing circuit among the embodiment 3 is not repeated in this description herein.Among the embodiment 3, the computing formula of the output voltage of the voltage output end of DC-DC U31 is similarly following calculating formula:
Uo=(VDC+VAC)/(R2*(1+R3/R4))*R?1+VFB
＝VAC*R1/(R2*(1+R3/R4))+VDC*R1/R2*(1+R3/R4))+VFB
In above-mentioned computing formula, VDC*R1/R2* (1+R3/R4))+VFB is direct voltage, VAC*R1/ (R2* (1+R3/R4)) is the ripple composition of output voltage.In the situation that each element of voltage stabilizing circuit is selected, the attributes such as the center voltage value that the VDC of change control voltage input end and VAC get final product corresponding change output voltage U o, frequency, fluctuation range.
Need to prove, when adopting the DC-DC device to realize ripple power source device of the present invention, can design different peripheral circuits according to the difference of the required peripheral cell of different DC-DC devices, then slightly different such as the design of peripheral circuit among the embodiment 2 and 3.Ripple power source device of the present invention is not limited to the concrete circuit design of voltage stabilizing circuit (even peripheral circuit); as long as its satisfy the pressure feedback port at power supply voltage stabilizing chip required among the present invention apply the ripple signal to the output voltage of power supply voltage stabilizing chip regulate, in the hope of obtain the direct voltage output with ripple at voltage output end, all should be included in protection scope of the present invention.Certainly, the present invention also is not limited to the particular type of the concrete power supply voltage stabilizing chip that is subjected to its pressure feedback port control that uses, the LVR and DC-DC of the specific model that in the present invention, is clearly listed, also can select according to actual needs LVR and the DC-DC of other models, the power supply voltage stabilizing chip of perhaps selecting according to actual needs other to be fit to.
In another embodiment of the present invention, can adopt the N-type field effect transistor to replace the sampling employed triode Q1 of partial pressure unit (this triode is NPN type triode) among the embodiment 1-3, also can adopt voltage comparator to replace comparing the employed operational amplifier of regulon among the embodiment 1-3, the remaining circuit design is constant; Still can obtain at the voltage output end of power supply voltage stabilizing chip the direct voltage with ripple this moment.
In ripple power source device provided by the present invention provides method with the direct voltage of ripple, when the control voltage input end of voltage stabilizing circuit is applied with d. c. voltage signal and ripple signal, voltage stabilizing circuit transmits ripple signal and d. c. voltage signal simultaneously to the pressure feedback port of power supply voltage stabilizing chip, obtains described direct voltage with ripple with the voltage output end at power supply voltage stabilizing chip.
As shown in Figure 5, adopt ripple power source device of the present invention to obtain specifically comprising following substep with the step of the direct voltage of ripple at the voltage output end of power supply voltage stabilizing chip:
Step S101: use sampling partial pressure unit is carried out the dividing potential drop sampling to the Voltage-output of power supply voltage stabilizing chip, obtains the first branch pressure voltage; The first branch pressure voltage is the voltage on the second resistance R 2 among Fig. 1,2a and the 3a;
Step S102: amplify the first branch pressure voltage that the sampling of sampling partial pressure unit dividing potential drop obtains;
Step S103: the voltage ratio (namely regulating the voltage ratio of dividing potential drop sampling) of regulating the sampling partial pressure unit based on control voltage and the comparative result of the first branch pressure voltage that amplifies through amplifying unit of the input of control voltage input end; Particularly, control voltage is d. c. voltage signal and ripple signal, regulates the collector current of triode in the sampling partial pressure unit through the 7th resistance R 7, thereby realizes the corresponding regulation and control of voltage ratio; In step S103, because relatively the control voltage input end of regulon has been inputted ripple signal and d. c. voltage signal simultaneously, therefore in the final closed control circuit that forms, the collector current Ic of sampling partial pressure unit is determined jointly by ripple signal and d. c. voltage signal, also be about to control ripple signal and the d. c. voltage signal that voltage input end applies and be delivered to simultaneously pressure feedback port, carry out corresponding control with the output voltage to power supply voltage stabilizing chip; And
Step S104: according to the voltage output end of the voltage ratio control power supply voltage stabilizing chip after regulating, so that the output of power supply voltage stabilizing chip is with the direct voltage of ripple.
In sum, in the present invention, utilize the output voltage of power supply voltage stabilizing chip to be subjected to the characteristics of pressure feedback port control, after its pressure feedback port applies ripple signal and d. c. voltage signal simultaneously, can obtain being superimposed with at the output of power supply voltage stabilizing chip the direct voltage of ripple signal; The center voltage value of this output signal equals to control the direct voltage of voltage input end input, has than the strong band loading capability, and frequency and the amplitude of the ripple that superposes are controlled, thereby can satisfy different testing requirements; Ripple power source device line design provided by the present invention is simple, cost is low and be easy to realization.
Claims (9)
1. a ripple power source device is used for providing the direct voltage with ripple, it is characterized in that described ripple power source device comprises power supply voltage stabilizing chip and voltage stabilizing circuit; The control voltage input end of described voltage stabilizing circuit be applied with control voltage, to regulate the output voltage of described power supply voltage stabilizing chip:
When described control voltage is d. c. voltage signal and ripple signal, described voltage stabilizing circuit transmits ripple signal and d. c. voltage signal simultaneously to the pressure feedback port of described power supply voltage stabilizing chip, obtains described direct voltage with ripple with the voltage output end at described power supply voltage stabilizing chip.
2. ripple power source device according to claim 1 is characterized in that, described voltage stabilizing circuit is comprised of sampling partial pressure unit, amplifying unit and comparison regulon, wherein:
Described sampling partial pressure unit is used for the Voltage-output of described power supply voltage stabilizing chip is carried out the dividing potential drop sampling and obtains the first branch pressure voltage,
Described amplifying unit is used for amplifying the first branch pressure voltage of described sampling partial pressure unit,
D. c. voltage signal and ripple signal that described relatively regulon is used for applying based on described control voltage input end are regulated the voltage ratio of described sampling partial pressure unit with the comparative result of the first branch pressure voltage that amplifies through described amplifying unit, obtain described direct voltage with ripple with the voltage output end at described power supply voltage stabilizing chip.
3. ripple power source device according to claim 2, it is characterized in that, described sampling partial pressure unit is by the first resistance, the second resistance and adjustment pipe form, the first end of described the first resistance connects the voltage output end of described power supply voltage stabilizing chip, the second end connects respectively the first end of described adjustment pipe and the pressure feedback port of described power supply voltage stabilizing chip, the first end of described the second resistance connects the second end of described adjustment pipe, the second end ground connection, the 3rd end of described adjustment pipe is connected to receive described relatively regulon to the adjusting of the voltage ratio of described sampling partial pressure unit with described relatively regulon.
4. ripple power source device according to claim 3 is characterized in that, described adjustment pipe is NPN type triode or N-type field effect transistor.
5. ripple power source device according to claim 2, it is characterized in that, described amplifying unit is comprised of operational amplifier, the 3rd resistance and the 4th resistance, the input of described operational amplifier is described the first branch pressure voltage that the sampling of described sampling partial pressure unit dividing potential drop obtains, the first end of the inverting input of described operational amplifier and described the 3rd resistance and the second end of the 4th resistance is connected, output is connected with the second end of described the 3rd resistance.
6. ripple power source device according to claim 2, it is characterized in that, described relatively regulon comprises operational amplifier and the 7th resistance, and the inverting input of described operational amplifier connects the output of described amplifying unit, in-phase input end is that described control voltage input end, output are connected with described sampling partial pressure unit through the 7th resistance.
7. ripple power source device according to claim 2, it is characterized in that, described relatively regulon comprises voltage comparator and the 7th resistance, and the inverting input of described voltage comparator connects the output of described amplifying unit, in-phase input end is that described control voltage input end, output are connected with described sampling partial pressure unit through the 7th resistance.
8. a ripple power source device provides the method with the direct voltage of ripple, described ripple power source device comprises power supply voltage stabilizing chip and voltage stabilizing circuit, the control voltage input end of described voltage stabilizing circuit be applied with control voltage, to regulate the output voltage of described power supply voltage stabilizing chip, it is characterized in that:
When described control voltage is d. c. voltage signal and ripple signal, described voltage stabilizing circuit transmits ripple signal and d. c. voltage signal simultaneously to the pressure feedback port of described power supply voltage stabilizing chip, obtains described direct voltage with ripple with the voltage output end at described power supply voltage stabilizing chip.
9. ripple power source device according to claim 8 provides the method with the direct voltage of ripple, it is characterized in that, the step that obtains described direct voltage with ripple at the voltage output end of described power supply voltage stabilizing chip comprises following substep:
Voltage-output to described power supply voltage stabilizing chip carries out the dividing potential drop sampling, obtains the first branch pressure voltage;
Amplify the first branch pressure voltage that the dividing potential drop sampling obtains;
The comparative result of the d. c. voltage signal that applies based on described control voltage input end and the first branch pressure voltage of ripple signal and amplification is regulated the voltage ratio of dividing potential drop sampling; And
Control the voltage output end of described power supply voltage stabilizing chip according to the voltage ratio after regulating, so that the output of described power supply voltage stabilizing chip is with the direct voltage of ripple.
Priority Applications (1)
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| CN104122924A (en) * | 2014-07-18 | 2014-10-29 | 苏州华兴源创电子科技有限公司 | Switch-type voltage stabilizing circuit and constant voltage constant current generation circuit with switch-type voltage stabilizing circuit |
| CN105675932A (en) * | 2016-01-21 | 2016-06-15 | 中国电力科学研究院 | Testing power supply for aging of lightning arrester of high-voltage DC power transmission system |
| CN107121575A (en) * | 2016-02-24 | 2017-09-01 | 中兴通讯股份有限公司 | Testing for electrical equipment noise generator and the method that electronic equipment is tested using it |
| CN108809089A (en) * | 2018-06-06 | 2018-11-13 | 浙江大学 | Wireless high-voltage controller |
| CN108983141A (en) * | 2018-05-07 | 2018-12-11 | 浙江涵普电力科技有限公司 | The DC voltage and ripple voltage synthesizer of direct current energy meter |
| CN109298218A (en) * | 2018-10-19 | 2019-02-01 | 国网天津市电力公司电力科学研究院 | A kind of DC voltage source high-precision ripple modulating system |
| CN109884428A (en) * | 2019-02-22 | 2019-06-14 | 晶晨半导体(上海)股份有限公司 | A kind of method and test circuit for improving the stability of circuit system |
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| CN104122924A (en) * | 2014-07-18 | 2014-10-29 | 苏州华兴源创电子科技有限公司 | Switch-type voltage stabilizing circuit and constant voltage constant current generation circuit with switch-type voltage stabilizing circuit |
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| CN105675932A (en) * | 2016-01-21 | 2016-06-15 | 中国电力科学研究院 | Testing power supply for aging of lightning arrester of high-voltage DC power transmission system |
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| CN108809089A (en) * | 2018-06-06 | 2018-11-13 | 浙江大学 | Wireless high-voltage controller |
| CN109298218A (en) * | 2018-10-19 | 2019-02-01 | 国网天津市电力公司电力科学研究院 | A kind of DC voltage source high-precision ripple modulating system |
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| CN111413561A (en) * | 2020-03-24 | 2020-07-14 | 哈尔滨工业大学 | Power supply ripple simulation system with state monitoring function |
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