CN103207637A - Frequency compensating circuit in voltage stabilizer with low voltage drop - Google Patents
Frequency compensating circuit in voltage stabilizer with low voltage drop Download PDFInfo
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- CN103207637A CN103207637A CN201310147868XA CN201310147868A CN103207637A CN 103207637 A CN103207637 A CN 103207637A CN 201310147868X A CN201310147868X A CN 201310147868XA CN 201310147868 A CN201310147868 A CN 201310147868A CN 103207637 A CN103207637 A CN 103207637A
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Abstract
The invention discloses a frequency compensating circuit in a voltage stabilizer with low voltage drop. A three-end control circuit in the voltage stabilizer with low pressure drop is provided with a PNP conduction triode and can drag a base driving point to drop to 3.0V or lower so as to allow a current limiting resistor to be embedded between the base driving point and a base of the PNP conduction triode; the control circuit comprises a pair of small value capacitors which are used for guaranteeing stable operation of different output capacitors; and the control circuit can also be used with a p-channel transistor together.
Description
Technical field
The present invention relates to a control circuit, it is used for providing in the series voltage regulating circuit low pressure reduction to regulate.More particularly, the present invention relates to three an ends control, be used for driving a discrete PNP triode or p-channel transistor, so that an anodal series voltage regulator circuit of low pressure reduction to be provided.
Background technology
The series voltage regulator circuit needs the voltage difference between a minimum supply voltage and the voltage stabilizing output voltage, so that suitable regulation and control to be provided.This minimum voltage difference is as the pressure reduction of adjuster circuit.A voltage regulator circuit with low pressure reduction has many useful purposes.
The design idea of three end integrated circuit (IC) control device in the PNP voltage stabilizer normally, the base drive terminal directly is connected with the base stage of discrete PNP triode.This has improved the voltage available in the feed circuit to greatest extent, and this must use the base drive end as a supply voltage.Therefore, the general design of circuit is not the voltage of base drive end to be brought up to greater than 0 volt be lower than the voltage stabilizing input voltage.
In some voltage stabilizers were used, it may be to wish to use FET as turn-on transistor.Yet such application may need FET, and the grid voltage of this FET is pulled near ground connection (for example, create several volts grid---source voltage is poor).The design of conventional regulator control circuit is operation by this way not, and is as discussed above.
The design of three end IC control circuits (to a positive-negative-positive voltage stabilizer), the output current of voltage stabilizer and input voltage can not be detected as the purpose of current limliting.This is because the sensing of arbitrary type needs extra terminal.Therefore, the current-limiting points of IC internal base driving current-limiting circuit must be set up based on the prospective current gain of discrete triode and the expection voltage stabilizer output current, surpasses the disperse electric current of PNP triode and the restriction of rated power to avoid the voltage stabilizer operating conditions.
But if the user has selected a discrete PNP triode, it is unpredictable that protection will become, and it is desired that the current gain that this triode is different and the characteristic of rated power have surpassed manufacturer.For example, the user may select a PNP triode, can not operate in maximum base drive electric current safely, and this electric current is by the inside current-limiting circuit control of control circuit.
Similar problem with respect to the frequency compensated circuit generation.An IC regulator control circuit can use in various application circuits, and application circuit has output capacitance and the equivalent series resistance (ESR) of extensive different capacitances.Yet the frequency compensated circuit in the conventional IC regulator control circuit only provides stability usually in the limited scope of output capacitance.
Therefore, this might provide three terminal voltage regulator control circuits, and this circuit can be used in the low dropout voltage regulator design, and wherein different PNP turn-on transistors can be adjusted with current limliting in the different application.This will be further by desirable, if control circuit can bear the output capacitance of wide region, and if this control circuit grid---the source drive voltage of several volts can be provided for a FET turn-on transistor in a low voltage circuit.
Summary of the invention
An object of the present invention is to provide a kind of three end control circuits, be used for driving a PNP turn-on transistor in voltage regulator circuit, this circuit has a low pressure reduction and controlled current limliting.
Another object of the present invention provides a kind of frequency compensated circuit, and it can be combined to provide stability with the voltage regulator circuit output capacitance of different size in adjuster circuit.
Another object of the present invention provides a kind of three terminal regulator control circuit, when source voltage is limited to a low input, can drive a p-channel transistor.
Control circuit is designed to a base drive terminal voltage saturated during less than 3 volts, the preferential selection is lower than 1.1 volts under some low current conditions, such resistance can be embedded between base drive end and the PNP transistor base, thereby the power consumption in restriction voltage stabilizer output current and the control circuit, and make the p-channel fet can be used as turn-on transistor.
Technical solution of the present invention
Control circuit also comprises a frequency compensated circuit, can be implemented when the internal capacitance of neither one higher value, and stability is provided in the mu balanced circuit in having different output capacitors.
Documents, patent of invention: electric power management circuit and frequency compensation method thereof, application number: 200810088822.4
Description of drawings
The present invention above or other purpose and will be the below detailed description of advantage in occur, and by reference to the accompanying drawings:
Fig. 1 is the synoptic diagram according to the control circuit of an application circuit of the principle design of invention;
Fig. 2 is the simplified block diagram of the control circuit of the invention process case;
Fig. 3 is the synoptic diagram that the preferred control circuit of the present invention is implemented.
Embodiment
Fig. 1 has illustrated the example application circuit 100 of voltage regulator control circuit in the desired type of the present invention.The configuration of application circuit 100 is as an anodal serial regulating circuit.When a unregulated anodal input voltage V1N is applied to voltage input node 102 (with regard to the voltage of earth point 106 and Yan Shizheng), voltage modulator circuit 100 provides an anodal output voltage VO UT who regulated (also being positive) for the load that is connected on the voltage output node 104 with regard to earth point 106 extra voltages.In Fig. 1, a simple ohmic load RL is by resistance 108 expressions.
Current-limiting resistance 130, it is optional, for the base drive electric current of PNP triode 120 provides a controllable restriction, can adapt to different input voltages and different PNP triodes.The value of resistance 130 can be selected, for a given input voltage provides a required cut-off current.For example, suppose that output resistance VOUT is lower than suddenly because the overload situation causes the value that regulator 100 is regulated.Control circuit 110 will be attempted 120 conductings of PNP triode by a big base drive electric current I DR is cut into drive end.This electric current will produce one by the voltage of resistance 130.When the base drive electric current increases, will reach a point, this moment, the voltage Drive and Control Circuit 110 by resistance 130 entered saturated.The saturated restriction of the current controlled circuit processed of base drive.
Suppose the forward base stage of saturation voltage and the PNP triode 120 of control circuit 110---it approximately is 2 volts that emitter voltage drop is added up, the value of current-limiting resistance 130 is selected next so that a required base drive electric current I DR to be provided at an easy rate, by following formula: RPL=(VMIN-2)/IDR, wherein VMIN is minimum expectation input voltage.
Conventional regulator control circuit design idea is that drive end is operated in about 1 volt voltage stabilizer input voltage.This design does not need a current-limiting resistance, and the very little resistance of other probable values, as shown in Figure 1, does not need to increase considerably the pressure drop of voltage stabilizer.
The design control circuit 110 that the applicant has conceived allows the saturation voltage of drive end at low about 1.1 volts.This makes current-limiting resistance that a wideer scope (for example 20-110 ohm) be arranged, and it is embedded between drive end and the PNP transistor base, keeps a low pressure drop simultaneously.Though the applicant prefers such low saturation voltage, the applicant thinks that effective current limliting (being that current limliting avoids the PNP triode being lower than the miserable situation of damaging under high input voltage and the output short-circuit condition) can reach higher saturation voltage.For example, applicant's imagination, at the electric current of principle restriction according to the present invention, the control circuit voltage stabilizer voltage that can realize having the saturation voltage up to 3 volts is 5 volts.
In yet another aspect, feature of the present invention is a frequency compensated circuit, and when control circuit used with different output capacitor, it can be implemented in the control circuit so that stability to be provided.This is to finish by the preposition scheme that a combination feedback is provided and comprises the capacitor of one group of little value, will cause that the regulator loop gain is reduced to well below 0 decibel before steadily in high-frequency.Therefore, circuit allows the output capacitance that enough phase places and gain range are tolerated a wide region.
Fig. 2 shows with the form of block diagram, and typical control circuit system is fit to the control circuit 110 among the present invention.Control circuit 110 comprises a differential amplifier circuit 200, and it has an inverting input that is connected to feedback end FB, and a non-inverting input that is connected to reference circuits 210.Differential amplifier circuit 200 compares the voltage of terminal FB and a fixed voltage that is produced by reference circuit 210, and provides a differential signal for driving circuit 220.This differential signal control driving circuit 220 wherein, in response to differential signal, drives and earth terminal transmission drive current at control circuit.Control circuit 110 comprises that also an internal base drives current-limiting circuit 230, and its restriction is a predetermined value by the electric current that driving circuit 220 transmits, and when the working temperature of control circuit 110 surpassed threshold temperature, driving circuit 220 cut out.
Fig. 3 has shown a preferred version of circuit, in an integrated device electronics with the general structure of Fig. 2, is used for realizing control circuit 110 of the present invention.The purpose of this particular implementation provides a stable output voltage that is approximately 5 volts.This circuit generally includes three parts: a promoter region, a bias area and a control zone.
The purpose of promoter region is when voltage difference is passed through driving and earth terminal for the first time, to start control circuit 110 work.The promoter region is included in triode Q1, Q2, Q3 and the Q4A of Fig. 3 left-hand side.Triode Q1 is a crystal type field effect transistor that is produced by epitaxial growth, and when voltage difference was passed through driving and earth terminal for the first time, it provided electric current for the triode Q2 that connects diode.Triode Q2 is manufactured with higher forward voltage (VBE is approximately 850mV in the time of 25 degrees centigrade).Flow through triode Q2 with little electric current, Q3, then conducting immediately delivered current by resistance R 2 and R3, only when both absorb electric current from triode Q4A-G common base point simultaneously.This will cause triode Q4A-F conducting, in their base stage---and when emitter circuit is in parallel.The conducting meeting of triode Q4E causes extra electric current flow through resistance R 2 and R3.Extra electric current improves the voltage (namely by resistance R 2 and R3) of triode Q3 emitter, in order to finally make the base stage of Q3---and the emitter node reverse bias, therefore, after the conducting of Q4A-F triode, cut off the promoter region from the circuit remainder.In case control circuit 110 work, the assembly in the promoter region is less than influence.
Further move to the right side of Fig. 3, triode Q5, Q6 and Q7 have formed bias area.These triode biasings PNP triode string Q4A-G provides the substantially invariable electric current from all PNP collectors, even change output/driving voltage.This substantially constant electric current also is used to produce one through the substantially invariable voltage of resistance R 2 and R3.
This bias area can be operated below 1 volt about.Triode Q5 and Q6 are connected image current and dispose, and have unequal emitter area ratio 10: 1, when triode Q5 transmits the electric current that equates with Q6, cause that the voltage VBE that is approximately 60mV is by resistance R 1.This voltage is arranged on electric current on the biasing triode Q4B-F, has a positive temperature coefficient.The connection of triode Q7 is to be used to provide a backfeed loop.This backfeed loop is guaranteed a substantially invariable electric current, changes the voltage of drive end simultaneously.Capacitor C 1 is used to backfeed loop that frequency compensation is provided.
The control zone of control circuit 110 be band gap with reference to type, and comprise reference voltage generator and the differential amplifier circuit (corresponding to the zone 200 and 210 of Fig. 2) of a combination, it drives a current gain level (corresponding to the drive circuit area 220 of Fig. 2).More particularly, the active component of having formed band-gap circuit at the triode Q15-20 on Fig. 3 right side.The output driving current gain stage triode Q12 of the circuit of this band gap type, Q9 and Q10, this is the base drive of Drive and Control Circuit point (being drive end) again conversely.Fig. 3 band-gap circuit is to provide energy by the electric current from the feedback end (FB) of controlling circuit 110.Total institute is known, therefore only simply discusses here, and a band-gap circuit is worked with the reference voltage that a temperature stabilization is provided by balance positive pole and negative pole temperature coefficient.In Fig. 3, when voltage was applied on the FB terminal, electric current flow to triode/resistance string R9, Q19 (diode connects), Q18 (and relevant biasing resistor R10 and R11), Q17 (diode connects), R13, Q16 and R15.By means of the image current device of triode Q19 and Q20, equal electric current will flow through resistance R 8 and triode Q20.Through the electric current of triode Q19 and Q20, and resistance R 9, the voltage of R13 and R16 has positive temperature coefficient (PTC), has offset the base stage of triode Q16-Q19---the negative temperature coefficient in the emitter voltage.
Triode Q15 and Q20 are as a differential amplifier, and its output is a differential signal, in the collector appearance of triode Q15.The voltage of this node forces compacting as current-limiting protection by triode Q13, as following discussion.
Along with feedback terminal place voltage rises, the triode/resistance string R9 that flows through, Q19, Q18, Q17, R13, Q16, the electric current of R16, and the electric current of process resistance R 8 and triode Q20, equivalent addition.Yet, when electric current improves the voltage VBE of process resistance R 16, will cause that the current ratio of triode Q16 and Q15 reduces, for example the collector voltage of triode Q15 is high at first, begins to reduce.When the pressure drop by resistance R 16 reached about 60mV, the current ratio between triode Q15 and the Q16 became about 1: 1.Control circuit 110 is designed to regulate this point, this equates the voltage of one 5 volts of feedback ends.
The voltage of triode Q15 collector drives by triode Q12, Q9 and Q10 and biasing resistor R4, the current gain level that R5 and R6 form.Triode Q12, it receives the working current from triode Q14 and Q4F, penetrates level as one and follows impact damper.When the voltage of feedback end during less than 5 volts, it is high that the collector voltage of triode Q15 keeps base stage and the emitter voltage of triode Q12, and this causes output to drive triode Q9 conversely again and Q10 absorbs electric current from drive end.When driving, the output terminal of triode Q9 and Q10 can make the voltage of drive end be reduced to less than 1.5 volts, and drive current is 10mA.This saturation voltage rises to about 2 volts at drive current during for 150mA.Therefore, the current-limiting resistance of an outside can be embedded between the drive end and discrete PNP triode of control circuit 110, is used for limiting the base drive electric current, and the pressure drop that does not improve voltage regulator circuit.The value of resistance such as preceding discussion can be selected.
If the voltage of feedback end rises to 5 volts, the voltage of triode Q15 collector is to lower swing, offers the driving signal of Q9 and Q10 thereby reduce, and causes control circuit to infilter still less base drive electric current from drive end.Control circuit 110 can easily be modified regulation voltage rather than 5 volts.Applicant imagination, Fig. 3 circuit structure can be used to regulate cathode voltage, at 15 volts to the scope that is low to moderate 2.5 volts, in the basic structure of the circuit that has only slight variation.The scope of regulating is by revising triode Q17 and Q18 and resistance R 10, and the I/V characteristic of R11 and R13 realizes.These elements can be counted as being referred to as and comprise an adjustable impedor 300 (shown in Fig. 3), and this is the purpose that required regulation voltage is set.In order to reduce regulation voltage, for example, one or two can be removed triode Q17 and Q18, and biasing resistor R10 and R11 (it increases the pressure drop through triode Q18) can be removed or change, and perhaps the resistance of R13 can be lowered.
The impedor 300 of standard can be a simple resistance or a resistance combination, and triode and diode or similar are selected the pressure drop of therefore passing it and can produce suitable required regulation voltage.Yet what should keep firmly in mind is, when selecting specific element, forms the impedor 300 of standard, and the temperature drift of this circuit may be affected.The element combination zone should be such, and the required temperature drift (being generally zero) of control circuit obtains when voltage is required regulation voltage.
Should also be pointed out that, for lower regulation voltage (for example 2.85 volts), because the base voltage of Q12 is by the parasitic collector of triode Q20---base diode remains low-voltage, the problem of a startup may run into, and it can be dragged down by resistance or the triode that comprises triode Q19.For fear of this problem, from the drive end power supply, can when starting, provide current to base stage and the collector of triode Q12, thereby triode Q9 and Q10 are switched on.
Under the frequency of a permission regulation loop gain unit of being far smaller than 1, this zero zero point of having offset by capacitor C 2 generations.This provides phase margin for the output capacitance that allows a wide region.Zero frequency, the resistance of the impedance of element 300 and resistance R 15 and R16 is determined by the capacitance of capacitor C 3.The suitable value of capacitor C 2 and C3 can determine by rule of thumb.Resistance R 12 has been added to capacitor C3 so that esd protection to be provided.
The feature of control circuit 110 some other aspects is significant.Referring again to arriving triode Q4F, triode is assisted the startup of control circuit.When starting, triode Q14 does not provide electric current (voltage of supposing feedback terminal FB is low).Triode Q4F by the drive end power supply, therefore is used for providing electric current to the base stage of output driving triode Q10, to begin to drive outside PNP turn-on transistor.Triode Q14 can remove from circuit.Yet it provides an extra current limit foldback function.If the output short-circuit of voltage stabilizer, triode Q14 will be closed.During normal running, this triode provides the working current of about 3/4ths (75 microamperes) for triode Q10 and Q12.Therefore, the drive current that output short-circuit causes triode Q10 to use is showing and is reducing, thereby turns back the restriction of control circuit internal current effectively.Triode Q4G provides the purpose of clamping plate and keeps triode Q4F unsaturated, and this can upset the bias voltage of other PNP triode in the biasing string.Resistance R 6 is added to and stops high frequency oscillation on the out drive stage.Triode Q13 provides an internal current restriction, and its working method is as follows.Base stage on the triode Q13---the little electric current of emitter node common reverse bias triode Q9 and Q10, because pass the base voltage that the voltage of resistance R 2 and R3 is higher than triode Q12, the base stage of Q12 is connected with the emitter of Q13.Yet; for bigger electric current, the base stage of triode Q13---emitter node forward bias, thereby turn-on transistor Q12; this will cause electric current, and it can force the base stage of triode Q12 to uprise ground connection then by the collector of triode Q13 usually, thereby produces clamping action.Inner cut-off current is set by the value of resistance R 4.In the concrete enforcement of Fig. 3, inner current-limiting circuit is 170mA at drive end restriction electric current.
The heat protection is provided by triode Q8, if surpass threshold temperature, it makes electric current away from the base stage of Q10.The voltage of triode Q8 base stage has positive temperature coefficient (PTC).Triode Q8 base stage---emitter node has a negative temperature coefficient.Triode Q8 conducting under about 165 degrees centigrade temperature.
Therefore, a kind of new voltage regulator control circuit has produced.Technician in the art will be understood that outside the feasible described embodiment of the present invention, the various supplementary elements in side circuit contact with substituting each other, though not shown in the drawings, can use.Described concrete enforcement presents as purpose rather than limits, and the present invention is limited by claim only.
Claims (7)
1. the frequency compensated circuit in low dropout voltage regulator, it is characterized in that: voltage modulator circuit comprises a drive end, a feedback end and an earth terminal, a differential signal generation circuit that is connected to feedback end and earth terminal, it has an output node at the collector of PNP triode, frequency compensated circuit comprises: first capacitor-coupled is between output node and NPN transistor base, and it descends the gain of differential signal generation circuit; Second capacitor-coupled is between NPN transistor base and feedback end, and it provides a zero point, can cancel the limit that is produced by the frequency of first capacitor when allowing the voltage stabilizer loop gain well below unit 1.
2. the frequency compensated circuit in the low dropout voltage regulator according to claim 1 is characterized in that: band-gap circuit when described differential signal produces circuit comprises:
A differential amplifier comprises a PNP triode, its emitter-coupled is to feedback end, collector coupled is to output node, the one a NPN triode, its emitter-coupled is to earth terminal, collector coupled is to output node, wherein differential amplifier produces a differential signal at output node, comprise the error between the electric current that is transmitted by a PNP triode and a NPN triode, differential signal causes voltage modulator circuit to regulate output voltage fully at the electrical voltage point of an expectation;
The 2nd NPN triode, it has an emitter---base circuit, with the base stage in the NPN triode in serial loop---the emitter circuit coupling, serial loop comprises first resistance between the emitter that is coupling in the first and second NPN triodes, the collector of the 2nd NPN triode is coupled to feedback end by at least one impedor, such first and second NPN triodes are delivered current in proportion, changes along with the variation of the electric potential difference between feedback end and the earth terminal;
The base stage of the 2nd PNP triode is coupled to the base stage of a PNP triode, its emitter-coupled is to feedback end, the emitter of the 2nd PNP triode---collector circuit and between feedback end and earth terminal at least one impedor series coupled, wherein the first and second PNP triodes make from the electric current of the feedback end ratio an almost fixed, and the level of electric current is along with the variation of electric potential difference between feedback end and the earth terminal responsively changes; Wherein, differential signal is produced by differential amplifier, responsively change along with the variation of the electric potential difference between feedback end and the earth terminal, and be coupled to feedback end by at least one impedor of the 2nd NPN transistor collector, and and the emitter of the 2nd PNP triode---collector circuit is coupled in series between feedback end and the earth terminal, helps the setting of the required regulation voltage point of voltage regulator.
3. the frequency compensated circuit in the low dropout voltage regulator according to claim 2; it is characterized in that: also comprise the resistance of one and second capacitances in series between a NPN transistor base and feedback end coupling, resistance provides electrostatic discharge (ESD) protection for second electric capacity.
4. the frequency compensated circuit in the low dropout voltage regulator according to claim 3, it is characterized in that: the collector of described the 2nd NPN triode is coupling in feedback end by at least one impedor, and this impedor can be coupled in series in collector---the emitter circuit of the 2nd PNP triode between feedback end and the earth terminal.
5. the frequency compensated circuit in the low dropout voltage regulator according to claim 4, it is characterized in that: described differential signal produces circuit and comprises second resistance that is coupled to a NPN transistor base, and the electric capacity of it and first capacitor joins together to arrange the pole frequency of first capacitor.
6. the frequency compensated circuit in the low dropout voltage regulator according to claim 5, it is characterized in that: differential signal produces circuit and comprises the 3rd resistance that is coupling between the 2nd NPN transistor base and the collector, is used for balanced differential to produce electric current in the circuit.
7. the frequency compensated circuit in the low dropout voltage regulator according to claim 5, it is characterized in that: the zero frequency of described second electric capacity is by the electric capacity of second capacitor, and the resistance of at least one impedor impedance and first and second resistance determines jointly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310147868XA CN103207637A (en) | 2013-04-24 | 2013-04-24 | Frequency compensating circuit in voltage stabilizer with low voltage drop |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310147868XA CN103207637A (en) | 2013-04-24 | 2013-04-24 | Frequency compensating circuit in voltage stabilizer with low voltage drop |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616921A (en) * | 2013-11-27 | 2014-03-05 | 苏州贝克微电子有限公司 | Control circuit of low-pressure-drop voltage stabilizer |
| CN103618544A (en) * | 2013-11-26 | 2014-03-05 | 苏州贝克微电子有限公司 | Instantly-protected isolator |
| CN106329942A (en) * | 2016-08-31 | 2017-01-11 | 洛阳隆盛科技有限责任公司 | High-efficiency low-ripple high-reliability miniature high-voltage power supply |
| CN110260850A (en) * | 2019-06-14 | 2019-09-20 | 哈尔滨工程大学 | A kind of high-voltage-stable biasing circuit of hemispherical resonator |
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| US5334928A (en) * | 1991-10-31 | 1994-08-02 | Linear Technology Corporation | Frequency compensation circuit for low dropout regulators |
| US6603292B1 (en) * | 2001-04-11 | 2003-08-05 | National Semiconductor Corporation | LDO regulator having an adaptive zero frequency circuit |
| CN102063146A (en) * | 2011-01-21 | 2011-05-18 | 东南大学 | Adaptive frequency-compensation linear voltage stabilizer with low voltage difference |
| CN203324874U (en) * | 2013-04-24 | 2013-12-04 | 苏州硅智源微电子有限公司 | Frequency compensating circuit of low dropout voltage regulator |
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- 2013-04-24 CN CN201310147868XA patent/CN103207637A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5334928A (en) * | 1991-10-31 | 1994-08-02 | Linear Technology Corporation | Frequency compensation circuit for low dropout regulators |
| US6603292B1 (en) * | 2001-04-11 | 2003-08-05 | National Semiconductor Corporation | LDO regulator having an adaptive zero frequency circuit |
| CN102063146A (en) * | 2011-01-21 | 2011-05-18 | 东南大学 | Adaptive frequency-compensation linear voltage stabilizer with low voltage difference |
| CN203324874U (en) * | 2013-04-24 | 2013-12-04 | 苏州硅智源微电子有限公司 | Frequency compensating circuit of low dropout voltage regulator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103618544A (en) * | 2013-11-26 | 2014-03-05 | 苏州贝克微电子有限公司 | Instantly-protected isolator |
| CN103616921A (en) * | 2013-11-27 | 2014-03-05 | 苏州贝克微电子有限公司 | Control circuit of low-pressure-drop voltage stabilizer |
| CN106329942A (en) * | 2016-08-31 | 2017-01-11 | 洛阳隆盛科技有限责任公司 | High-efficiency low-ripple high-reliability miniature high-voltage power supply |
| CN110260850A (en) * | 2019-06-14 | 2019-09-20 | 哈尔滨工程大学 | A kind of high-voltage-stable biasing circuit of hemispherical resonator |
| CN110260850B (en) * | 2019-06-14 | 2023-10-10 | 哈尔滨工程大学 | High-voltage stable bias circuit of hemispherical harmonic oscillator |
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Application publication date: 20130717 |