CN214278772U - Voltage generation unit and electronic device - Google Patents
Voltage generation unit and electronic device Download PDFInfo
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- CN214278772U CN214278772U CN202120488910.4U CN202120488910U CN214278772U CN 214278772 U CN214278772 U CN 214278772U CN 202120488910 U CN202120488910 U CN 202120488910U CN 214278772 U CN214278772 U CN 214278772U
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Abstract
The present disclosure provides a voltage generation unit including: the first voltage generating module is used for generating a first voltage; the second voltage generation module is used for generating a second voltage; the second voltage adjusting module is used for receiving a second voltage and adjusting the second voltage to output a second adjusting voltage; the control module receives the first voltage and the second adjusting voltage, and controls the second voltage adjusting module to adjust the second voltage based on the related information of the first voltage and/or the related information of the second adjusting voltage; and an addition module that receives the first voltage and the second adjustment voltage and generates a third voltage, wherein the control module controls the second voltage adjustment module based on a difference between a first voltage difference value at two times and a second adjustment voltage difference value at two times. The disclosure also provides a voltage generation method and an electronic device.
Description
Technical Field
The present disclosure relates to a voltage generation unit and an electronic apparatus.
Background
In an integrated circuit, an absolute voltage is required as a reference value for a stability criterion, but the voltage value varies depending on external conditions. Therefore, how to obtain the voltage reference value is a technical problem which is always solved in the field.
In the prior art, the stability of the output voltage is mainly improved by improving the electronic device of the reference source, but the improvement of the electronic device inevitably increases the cost, and the electronic device is influenced by external conditions, and the parameters of the electronic device are changed, so that the voltage output is influenced to a greater or lesser extent even if the improvement is carried out.
For example, in a reference source affected by temperature, the prior art is usually used to eliminate the first-order effect, and the high-order effect still exists, so that the variation of the reference voltage generated by the temperature-affected reference source still exists.
SUMMERY OF THE UTILITY MODEL
In order to solve one of the above technical problems, the present disclosure provides a voltage generation unit and an electronic device.
According to an aspect of the present disclosure, a voltage generation unit includes:
the first voltage generating module is used for generating a first voltage;
the second voltage generation module is used for generating a second voltage;
a second voltage adjustment module for receiving the second voltage and adjusting the second voltage to output a second adjusted voltage;
a control module, which receives the first voltage and the second adjustment voltage, and controls a second voltage adjustment module to adjust the second voltage based on the information related to the first voltage and/or the information related to the second adjustment voltage; and
an addition module to receive the first voltage and a second adjusted voltage and to generate a third voltage
Wherein the control module controls the second voltage adjustment module based on a difference between a first voltage difference value at two times and a second adjustment voltage difference value at two times.
The voltage generation unit according to at least one embodiment of the present disclosure further includes:
the first analog-to-digital conversion module is used for acquiring the first voltage, performing analog-to-digital conversion on the first voltage and providing a converted first digital signal to the control module; and
and the second analog-to-digital conversion module is used for acquiring the second adjustment voltage, performing analog-to-digital conversion on the second adjustment voltage and providing a converted second digital signal to the control module.
According to the voltage generation unit of at least one embodiment of the present disclosure, the first analog-to-digital conversion module and the second analog-to-digital conversion module use the third voltage as a target voltage so as to convert the first voltage into a first digital signal and convert the second adjustment voltage into a second digital signal.
According to the voltage generation unit of at least one embodiment of the present disclosure, the second voltage adjustment module includes a second coefficient adjustment module and a second multiplication module, the control module controls adjustment of the second coefficient, and the second multiplication module multiplies the adjusted second coefficient by the second voltage to obtain the second adjusted voltage.
According to the voltage generation unit of at least one embodiment of the present disclosure, the control module determines whether a first difference between a first digital signal of a first voltage at a first time and a first digital signal of the first voltage at a second time is equal to a second difference between a second digital signal of a second adjustment voltage at the first time and a second digital signal of the second adjustment voltage at the second time, and adjusts the second coefficient if the first difference is not equal to the second difference.
According to the voltage generation unit of at least one embodiment of the present disclosure, at the first timing, the second coefficient is adjusted so that the third voltage at the first timing is equal to a desired voltage.
According to the voltage generating unit of at least one embodiment of the present disclosure, if the second difference is greater than the first difference, the second coefficient is decreased, and a second difference between a second digital signal of a second adjustment voltage generated according to the decreased second coefficient and a second digital signal of a second adjustment voltage at the first time is compared with the first difference, and if the second difference is not equal to the first difference, the second coefficient is continuously decreased until the second difference is equal to the first difference.
According to the voltage generating unit of at least one embodiment of the present disclosure, if the second difference is smaller than the first difference, the second coefficient is increased, and a second difference between a second digital signal of the second adjustment voltage generated according to the increased second coefficient and a second digital signal of the second adjustment voltage at the first time is compared with the first difference, and if the second difference is not equal to the first difference, the second coefficient continues to be increased until the second difference is equal to the first difference.
The voltage generation unit according to at least one embodiment of the present disclosure further includes: a first voltage adjusting module, wherein the first voltage adjusting module comprises a first coefficient adjusting module and a first multiplying module, the control module controls the adjustment of the first coefficient, the first multiplying module multiplies the adjusted first coefficient by the first voltage to obtain a first adjusted voltage, the first adjusted voltage is provided to the control module, and the control module controls the first voltage adjusting module and/or the second voltage adjusting module to adjust the first voltage and/or the second voltage based on the related information of the first adjusted voltage and/or the related information of the second adjusted voltage.
According to the voltage generation unit of at least one embodiment of the present disclosure, the control module determines whether a first difference between a first digital signal of a first adjustment voltage at a first time and a first digital signal of the first adjustment voltage at a second time is equal to a second difference between a second digital signal of a second adjustment voltage at the first time and a second digital signal of the second adjustment voltage at the second time, and adjusts the first coefficient and/or the second coefficient if the first difference is not equal to the second difference.
According to the voltage generation unit of at least one embodiment of the present disclosure, at the first time, the first coefficient and/or the second coefficient are adjusted so that a third voltage at the first time is equal to a desired voltage.
According to the voltage generation unit of at least one embodiment of the present disclosure, if the second difference is greater than the first difference, the second coefficient is decreased and/or the first coefficient is increased, the first difference and the second difference are obtained again, and the first difference and the second difference are continuously compared, and if the first difference and the second difference are not equal, the second coefficient is decreased and/or the first coefficient is increased until the second difference is equal to the first difference.
According to the voltage generation unit of at least one embodiment of the present disclosure, if the second difference is smaller than the first difference, the second coefficient is increased and/or the first coefficient is decreased, the first difference and the second difference are obtained again, the first difference and the second difference are continuously compared, and if the first difference and the second difference are not equal, the second coefficient is increased and/or the first coefficient is decreased until the second difference is equal to the first difference.
According to the voltage generation unit of at least one embodiment of the present disclosure, the first voltage generated by the first voltage generation module and the second voltage generated by the second voltage generation module are voltages that vary according to external conditions.
According to the voltage generation unit of at least one embodiment of the present disclosure, the external condition is temperature, current, and/or voltage.
According to the voltage generation unit of at least one embodiment of the present disclosure, the first voltage is a positive temperature coefficient voltage and the second voltage is a negative temperature coefficient voltage, or
The first voltage is a positive current coefficient voltage and the second voltage is a negative current coefficient voltage, or
The first voltage is a positive voltage coefficient voltage and the second voltage is a negative voltage coefficient voltage.
According to yet another aspect of the present disclosure, an electronic device includes the voltage generation unit as described above, which forms a reference voltage of the electronic device.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
Fig. 1 illustrates a voltage generation unit according to one embodiment of the present disclosure.
FIG. 2 shows a schematic diagram of establishing functional relationships according to one embodiment of the present disclosure.
Fig. 3 shows a schematic view of an electronic device according to an embodiment of the present disclosure.
Fig. 4 shows a flow diagram of a voltage generation method according to an embodiment of the present disclosure.
Fig. 5 shows a flow diagram of a voltage generation method according to an embodiment of the present disclosure.
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. Technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Unless otherwise indicated, the illustrated exemplary embodiments/examples are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Accordingly, unless otherwise indicated, features of the various embodiments may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present disclosure.
The use of cross-hatching and/or shading in the drawings is generally used to clarify the boundaries between adjacent components. As such, unless otherwise noted, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, proportion, commonality between the illustrated components and/or any other characteristic, attribute, property, etc., of a component. Further, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. While example embodiments may be practiced differently, the specific process sequence may be performed in a different order than that described. For example, two processes described consecutively may be performed substantially simultaneously or in reverse order to that described. In addition, like reference numerals denote like parts.
When an element is referred to as being "on" or "on," "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no intervening elements present. For purposes of this disclosure, the term "connected" may refer to physically, electrically, etc., and may or may not have intermediate components.
For descriptive purposes, the present disclosure may use spatially relative terms such as "below … …," below … …, "" below … …, "" below, "" above … …, "" above, "" … …, "" higher, "and" side (e.g., as in "side wall") to describe one component's relationship to another (other) component as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below … …" can encompass both an orientation of "above" and "below". Further, the devices may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, when the terms "comprises" and/or "comprising" and variations thereof are used in this specification, the presence of stated features, integers, steps, operations, elements, components and/or groups thereof are stated but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof. It is also noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximate terms and not as degree terms, and as such, are used to interpret inherent deviations in measured values, calculated values, and/or provided values that would be recognized by one of ordinary skill in the art.
According to one embodiment of the present disclosure, there is provided a voltage generation unit that can provide an accurate reference voltage.
Fig. 1 illustrates a voltage generation unit according to one embodiment of the present disclosure.
As shown in fig. 1, the voltage generating unit may include a first voltage generating module 11, a first analog-to-digital converting module 12, a second voltage generating module 21, a second analog-to-digital converting module 22, a second multiplying module 23, a coefficient adjusting module 24, an adding module 30, and a control module 40.
The first voltage generation module 11 may be used to generate a first voltage V1And the first voltage V1Supplied to a first analog-to-digital conversion modeAnd a block 12.
The first analog-to-digital conversion module 12 is configured to receive the first voltage and perform analog-to-digital conversion on the first voltage, so as to convert the first digital signal D1To the control module 40.
The second voltage generation module 21 may be used to generate the second voltage V2And the second voltage V2Is supplied to a second multiplying module 23 which receives a second voltage V2And an adjusted coefficient of the coefficient M of the coefficient adjustment module 24 and to sum the adjusted coefficient with the second voltage V2And multiplying to obtain a second regulated voltage.
The second analog-to-digital conversion module 22 is configured to receive the second adjustment voltage and perform analog-to-digital conversion on the adjustment voltage, so as to convert the second digital signal D2To the control module 40.
The control module receives the first digital signal and the second digital signal and controls the coefficient adjustment module 24 to adjust the coefficient according to the first digital signal and the second digital signal.
Wherein the adding module 30 may be configured to add the first voltage and the second adjustment voltage and obtain an added voltage VBG. The voltage VBGMay be used as a reference voltage.
In addition, the voltage VBGAlso provided to the first and second analog-to- digital conversion modules 12 and 22, the voltage V can be convertedBGAs the benchmarking voltages of the first analog-to-digital conversion module 12 and the second analog-to-digital conversion module 22. The first analog-to-digital conversion module 12 generates a first digital signal D by comparing the first voltage with the target voltage1The second analog-to-digital conversion module 22 generates a second digital signal D by comparing the second adjustment voltage with the benchmarking voltage2。
The adjustment coefficient M will be described in detail below by way of example. In an actual use process, the first voltage and the second voltage generated by the first voltage generation module 11 and the second voltage generation module 21 will change along with the change of the external condition along with the change of the time. If the first voltage and/or the second voltage are not adjusted, the reference voltageVBGVariations will be made.
The following description will be made by taking the first time T0 and the second time T1 as an example, wherein the time difference between the first time T0 and the second time T1 is preferably in milliseconds in the present disclosure.
At a first time T0, the value of the first coefficient M is adjusted so that the output voltage V of the addition unit at the first time T0REF(T0)Is a first reference voltage value VRFor example, the first reference voltage value may be equal to 1.24V, etc., and in the present disclosure, the specific voltage value is not specifically limited, and is used as an example.
At a first time T0, a first voltage V is measured and obtained by using a first analog-to-digital conversion module and a second analog-to-digital conversion module respectively1(T0)And a second regulated voltage M V2(T0)。
Respectively measuring a first voltage V by using a first analog-to-digital conversion module and a second analog-to-digital conversion module1(T0)And a second regulated voltage M V2(T0)Thus, the first voltage V can be obtained by the analog-to-digital conversion unit1(T0)First digital signal D of1(T0)And a second adjustment voltage M V2(T0)Second digital signal D2(T0)。
In addition, in the present disclosure, the output voltage of the addition module at the first time T0 is also measured, thereby obtaining the reference voltage VREF(T0)。
Wherein D is1(T0)May be equal to V1(T0)/VREF(T0). Wherein VREF(T0)Which is the voltage output by the summing block at a first time T0. D2(T0)May be equal to M V2(T0)/VREF(T0)。
Thus, M V2(T0)/V1(T0)＝D2(T0)/D1(T0)＝x0。
At this time, V1(T0)＝VREF(T0)*1/(1+x0)，M*V2(T0)＝VREF(T0)*x0/(1+x0)。
At a second time T1 (the second time T1 is a time after the first time T0), the first analog-to-digital conversion module and the second analog-to-digital conversion module are usedThe conversion modules measure first voltages V, respectively1(T1)And a second regulated voltage V2(T1)Thus, the first voltage V can be obtained by the analog-to-digital conversion unit1(T1)First digital signal D of1(T1)And a second adjustment voltage M V2(T1)Second digital signal D2(T1)。
In addition, the output voltage of the addition module at the second time T1 in the present disclosure is also measured, thereby obtaining the reference voltage VREF(T1)。
Wherein D is1(T1)May be equal to V1(T1)/VREF(T1). Wherein VREF(T1)Which is the voltage output by the summing block at a second time T1. D2(T1)May be equal to M V2(T1)/VREF(T1)。
Thus M V2(T1)/V1(T1)＝D2(T1)/D1(T1)＝x1。
At this time, V1(T1)＝VREF(T1)*1/(1+x1)，M*V2(T1)＝VREF(T1)*x1/(1+x1)。
The second adjustment voltage M V is from the first time T0 to the second time T12Change value Δ (M V)2)＝M*V2(T1)-M*V2(T0). I.e. equal to VREF(T1)*x1/(1+x1)—VREF(T0)* x0/(1+x0)。
From the first time T0 to the second time T1, the first voltage V1Change value Δ V of1＝M*V1(T1) -M*V1(T0)I.e. equal to VREF(T1)*x0/(1+x0)—VREF(T0)*x0/(1+x0)。
In the present disclosure, by the second adjustment voltage M V2Change value Δ (M V)2) And a first voltage V1Change value Δ V of1The difference between the reference voltages is zero to eliminate the variation of the reference voltage generated by the addition module due to the change of the external condition. Thus, Δ (M V)2) Must be equal to Δ V1。
Then VREF(T1)Must be equal to VREF(T0)，VREFWill not be affected by changes in external conditions.
It is assumed here first that VREF(T1)Equal to a first reference voltage, e.g. 1.24V, then VREF(T1)＝1.24。
Test 1.24 x1/(1+x1)—1.24*x0/(1+x0) Absolute value of |1.24 x1/(1+x1) —1.24*x0/(1+x0) L ("second absolute value" hereinafter).
If the second absolute value is equal to 1.24 x 1/(1+ x)1)—1.24*1/(1+x0) Absolute value of |1.24 × 1/(1+ x)1)—1.24*1/(1+x0) L (hereinafter referred to as a first absolute value). Then, VREF(T1)Is equal to VREF(T0)I.e. equal to 1.24V.
If the second absolute value is greater than the first absolute value, Δ (M V)2) Greater than Δ V1Then the first coefficient M is adjusted so that the first coefficient M becomes M- Δ M. Thus, V will be formedREF(T1)- ΔM*V2(T1)。
Measuring a second regulated voltage (M- Δ M) V again using the second analog-to-digital conversion module2(T1)The digital output of the second analog-to-digital conversion module is (M-Delta M) V2(T1)/VREF(T1)＝(M-ΔM) *V2(T1)/V1(T1)＝x1’。
The verification was performed again, examining |1.24 × x1’/(1+x1’)—1.24*x0/(1+x0) Whether | is greater than |1.24 × 1/(1+ x)1’)—1.24*1/(1+x0)|。
If so, (M- Δ M) is again decreased by Δ M, corresponding to (M-2 × Δ M).
If so, the effect due to the change in external conditions is considered to have been eliminated.
Wherein in case of this greater, the verification is continued and the Δ M is continued to be reduced depending on the result. Until a situation arises.
If |1.24 x1’/(1+x1’)—1.24*x0/(1+x0) I is less than |1.24 x 1/(1+ x)1’)— 1.24*1/(1+x0) L, illustrate Δ (M V)2) Less than Δ V1. The first coefficient M is adjusted so that the first coefficient M becomes M + Δ M. Thus, V will be formedREF(T1)+ΔM*V2(T1)。
Measuring a second regulated voltage (M + Δ M) V again using the second analog-to-digital conversion module2(T1)The digital output of the second analog-to-digital conversion module is (M + delta M) × V2(T1)/VREF(T1)＝(M+ΔM) *V2(T1)/V1(T1)＝x1’。
The verification was performed again, examining |1.24 × x1’/(1+x1’)—1.24*x0/(1+x0) Whether | is less than |1.24 × 1/(1+ x)1’)—1.24*1/(1+x0)|。
If less, then (M + Δ M) is increased by Δ M again, corresponding to (M +2 × Δ M). Until a situation arises.
Fig. 2 illustrates a voltage generation unit according to an embodiment of the present disclosure.
As shown in fig. 2, the voltage generating unit may include a first voltage generating module 11, a first analog-to-digital converting module 12, a first multiplying module 13, a first coefficient adjusting module 14, a second voltage generating module 21, a second analog-to-digital converting module 22, a second multiplying module 23, a coefficient adjusting module 24, an adding module 30, and a control module 40.
The first voltage generation module 11 may be used to generate a first voltage V1And the first voltage V1Is supplied to a first multiplying module 13 which receives a first voltage V1And an adjusted coefficient of the coefficient N of the first coefficient adjustment module 14 and to sum the adjusted coefficient with the first voltage V1The first and second adjustment voltages are multiplied to obtain a first adjustment voltage.
The first analog-to-digital conversion module 12 is configured to receive the first voltage and perform analog-to-digital conversion on the first voltage, so as to convert the first digital signal D1To the control module 40.
The second voltage generation module 21 may be used to generate the second voltage V2And the second voltage V2To a second multiplication module 23, aThe second multiplication module receives the second voltage V2And an adjusted coefficient of the coefficient M of the second coefficient adjustment module 24 and to sum the adjusted coefficient with the second voltage V2And multiplying to obtain a second regulated voltage.
The second analog-to-digital conversion module 22 is configured to receive the second adjustment voltage and perform analog-to-digital conversion on the adjustment voltage, so as to convert the second digital signal D2To the control module 40.
The control module 40 receives the first digital signal and the second digital signal and controls the coefficient adjustment module 24 to adjust the coefficient according to the first digital signal and the second digital signal.
Wherein the adding module 30 can be used for adding the first adjustment voltage and the second adjustment voltage and obtaining an added voltage VBG. The voltage VBGMay be used as a reference voltage.
In addition, the voltage VBGAlso provided to the first and second analog-to- digital conversion modules 12 and 22, the voltage V can be convertedBGAs the benchmarking voltages of the first analog-to-digital conversion module 12 and the second analog-to-digital conversion module 22. The first analog-to-digital conversion module 12 generates a first digital signal D by comparing the first adjustment voltage and the target voltage1The second analog-to-digital conversion module 22 generates a second digital signal D by comparing the second adjustment voltage with the benchmarking voltage2。
The adjustment coefficient M will be described in detail below by way of example. In an actual use process, the first voltage and the second voltage generated by the first voltage generation module 11 and the second voltage generation module 21 will change along with the change of the external condition along with the change of the time. If the first voltage and/or the second voltage are not adjusted, the reference voltage VBGVariations will be made.
In the embodiment with reference to fig. 1, only the case of adjusting one coefficient is described, and the case of adjusting two coefficients may be adopted as follows.
At a first time T0, the first coefficient M and/or the second coefficient N are adjusted so that the output voltage V of the addition unit at the first time T0REF(T0)Is a first reference voltage value VRFor example, the first reference voltage value may be equal to 1.24V, etc., and in the present disclosure, the specific voltage value is not specifically limited, and is used as an example.
At a first time T0, a first voltage V is measured and obtained by using a first analog-to-digital conversion module and a second analog-to-digital conversion module respectively1(T0)First adjusting voltage N V1(T0)And a second voltage V2(T0)Second adjustment voltage M V2(T0)。
Respectively measuring a first regulated voltage N V by using a first analog-to-digital conversion module and a second analog-to-digital conversion module1(T0)And a second regulated voltage M V2(T0)Thus, the first adjustment voltage N x V can be obtained by the analog-to-digital conversion unit1(T0)First digital signal D of1(T0)And a second adjustment voltage M V2(T0)Second digital signal D2(T0)。
In addition, in the present disclosure, the output voltage of the addition module at the first time T0 is also measured, thereby obtaining the reference voltage VREF(T0)。
Wherein D is1(T0)May be equal to N V1(T0)/VREF(T0). Wherein VREF(T0)Which is the voltage output by the summing block at a first time T0. D2(T0)May be equal to M V2(T0)/VREF(T0)。
Thus, M V2(T0)/(N*V1(T0))＝D2(T0)/D1(T0)＝x0。
At this time, N is V1(T0)＝VREF(T0)*1/(1+x0)，M*V2(T0)＝VREF(T0)*x0/(1+x0)。
At a second time T1 (the second time T1 is a time after the first time T0), the first adjustment voltage N × V is measured by the first analog-to-digital conversion module and the second analog-to-digital conversion module respectively1(T0)And a second regulated voltage M V2(T1)Thus, the first adjustment voltage N x V can be obtained by the analog-to-digital conversion unit1(T0)First digital signal D of1(T1)And a second adjustment voltage M V2(T1)Second digital message ofNumber D2(T1)。
In addition, the output voltage of the addition module at the second time T1 in the present disclosure is also measured, thereby obtaining the reference voltage VREF(T1)。
Wherein D is1(T1)May be equal to N V1(T1)/VREF(T1). Wherein VREF(T1)Which is the voltage output by the summing block at a second time T1. D2(T1)May be equal to M V2(T1)/VREF(T1)。
Thus M V2(T1)/N*V1(T1)＝D2(T1)/D1(T1)＝x1。
At this time, N is V1(T1)＝VREF(T1)*1/(1+x1)，M*V2(T1)＝VREF(T1)*x1/(1+x1)。
When the first adjustment voltage and the second adjustment voltage change from the first time T0 to the second time T1, the adjustment can be performed by referring to the same principle as the embodiment shown in fig. 1, and the details are not repeated here. For example, in the case of adjusting the coefficient M in the above embodiment, for example, such that the first coefficient M becomes M + Δ M, these manners may be adopted in this manner: 1. adjust only the first coefficient M to M + Δ M, 2 adjust only the second coefficient N to N- Δ N, or 3 adjust both the first coefficient M and the second coefficient N such that M + Δ M, and N- Δ N. These methods can be used for adjustment again.
In the present disclosure, the external condition may be temperature, voltage, and/or current, etc. For example, when the external condition changes to a temperature change, the first voltage generation module may be a negative temperature coefficient voltage generation module, and the first voltage V1May be a negative temperature coefficient voltage Vbe. The negative temperature coefficient voltage may be a base-emitter voltage of an NPN triode, a base-emitter voltage of a PNP triode, or a PN junction voltage of a diode. Or the gate source V of MOSFETGSVoltage or threshold voltage V of MOSFETTH。
The second voltage generation module may be a positive temperature coefficient voltage generation module, andthe two voltages V2 may be positive temperature coefficient voltages VPTAT. The positive Temperature coefficient voltage is a PTAT voltage (proportionality To Absolute Temperature voltage) that increases with increasing Temperature. Wherein the PTAT voltage may be implemented by a PTAT voltage generation circuit. That is, the negative temperature coefficient voltage refers to a voltage that decreases with an increase in temperature, and the positive temperature coefficient voltage refers to a voltage that increases with an increase in temperature.
In addition, when the first voltage generation module and the second voltage generation module generate voltages, external voltage sources or current sources are bound to be provided, and the different values provided by the external voltage sources or current sources can cause the voltage generated by the first voltage generation module and the second voltage generation module to fluctuate.
Embodiments according to the present disclosure will be more efficient and more accurate than the way the voltage is generated by hardware. Meanwhile, the influence of first-order change of the first voltage and the second voltage can be eliminated, and the influence caused by high-order change can also be eliminated. Further, according to the embodiments of the present disclosure, regardless of how much the initial reference voltage (voltage output by the addition module) deviates, it is possible to finally generate a stable desired reference voltage because of the determination method of the ratio employed.
According to another embodiment of the present disclosure, as shown in fig. 3, an electronic device is provided, wherein the electronic device may include the voltage generation unit, and the reference voltage generated by the voltage generation unit may supply power to other components in the electronic device.
According to a further embodiment of the present disclosure, a voltage generation method is also provided. Fig. 4 shows a flow diagram of a voltage generation method 1000 according to the present disclosure.
The first time T0 and the second time T1 will be explained as an example.
In step 1002, at a first time T0, the value of the first coefficient M is adjusted such that the output voltage V of the adding unit at the first time T0REF(T0)Is a first reference voltage value VRFor example, the first reference voltage value may be equal to 1.24V, etc., and in the present disclosure, the specific voltage value is not specifically limited, and is used as an example.
In step 1004, a first voltage V is measured at a first time T01(T0)And a second voltage V2(T0)。
In step 1006, at a first time T0, a first voltage V is measured and obtained by using the first analog-to-digital conversion module and the second analog-to-digital conversion module respectively1(T0)And a second regulated voltage M V2(T0)And the second adjusting voltage is the product of the adjusted first coefficient and the second voltage.
Respectively measuring a first voltage V by using a first analog-to-digital conversion module and a second analog-to-digital conversion module1(T0)And a second regulated voltage M V2(T0)Thus, the first voltage V can be obtained by the analog-to-digital conversion unit1(T0)First digital signal D of1(T0)And a second adjustment voltage M V2(T0)Second digital signal D2(T0)。
In addition, in the present disclosure, the output voltage of the addition module at the first time T0 is also measured, thereby obtaining the reference voltage VREF(T0)。
Wherein D is1(T0)May be equal to V1(T0)/VREF(T0). Wherein VREF(T0)Which is the voltage output by the summing block at a first time T0. D2(T0)May be equal to M V2(T0)/VREF(T0)。
Thus, M V2(T0)/V1(T0)＝D2(T0)/D1(T0)＝x0。
At this time, V1(T0)＝VREF(T0)*1/(1+x0)，M*V2(T0)＝VREF(T0)*x0/(1+x0)。
In step 1008, at a second time T1 (the second time T1 is a time after the first time T0), the first voltage V is measured by using the first analog-to-digital conversion module and the second analog-to-digital conversion module respectively1(T1)And a second regulated voltage V2(T1)In step 1010, the data is converted by an analog-to-digital conversion unitTo a first voltage V1(T1)First digital signal D of1(T1)And a second adjustment voltage M V2(T1)Second digital signal D2(T1)。
In step 1008, the output voltage of the addition module at the second time T1 is also measured, and the reference voltage V is obtainedREF(T1)。
Wherein D is1(T1)May be equal to V1(T1)/VREF(T1). Wherein VREF(T1)Which is the voltage output by the summing block at a second time T1. D2(T1)May be equal to M V2(T1)/VREF(T1)。
Thus M V2(T1)/V1(T1)＝D2(T1)/D1(T1)＝x1。
At this time, V1(T1)＝VREF(T1)*1/(1+x1)，M*V2(T1)＝VREF(T1)*x1/(1+x1)。
In step 1012, the voltage conversion value is determined. The second adjustment voltage M V is from the first time T0 to the second time T12Change value Δ (M V)2)＝M*V2(T1)-M*V2(T0). I.e. equal to VREF(T1)*x1/(1+x1)—VREF(T0)*x0/(1+x0)。
From the first time T0 to the second time T1, the first voltage V1Change value Δ V of1＝M*V1(T1) -M*V1(T0)I.e. equal to VREF(T1)*x0/(1+x0)—VREF(T0)*x0/(1+x0)。
If the voltage change values are not equal, the coefficients are adjusted in step 1014, and if equal, proceeding to step 1016 without adjusting the coefficients. In the present disclosure, by the second adjustment voltage M V2Change value Δ (M V)2) And a first voltage V1Change value Δ V of1The difference between the reference voltages is zero to eliminate the variation of the reference voltage generated by the addition module due to the change of the external condition. Thus, Δ (M V)2) Must be equal to Δ V1。
Then VREF(T1)Must be equal to VREF(T0)，VREFWill not be affected by changes in external conditions.
It is assumed here first that VREF(T1)Equal to a first reference voltage, e.g. 1.24V, then VREF(T1)＝1.24。
Test 1.24 x1/(1+x1)—1.24*x0/(1+x0) Absolute value of |1.24 x1/(1+x1) —1.24*x0/(1+x0) L ("second absolute value" hereinafter).
If the second absolute value is equal to 1.24 x 1/(1+ x)1)—1.24*1/(1+x0) Absolute value of |1.24 × 1/(1+ x)1)—1.24*1/(1+x0) L (hereinafter referred to as a first absolute value). Then, VREF(T1)Is equal to VREF(T0)I.e. equal to 1.24V.
If the second absolute value is greater than the first absolute value, Δ (M V)2) Greater than Δ V1Then the first coefficient M is adjusted so that the first coefficient M becomes M- Δ M. Thus, V will be formedREF(T1)- ΔM*V2(T1)。
Measuring a second regulated voltage (M- Δ M) V again using the second analog-to-digital conversion module2(T1)The digital output of the second analog-to-digital conversion module is (M-Delta M) V2(T1)/VREF(T1)＝(M-ΔM) *V2(T1)/V1(T1)＝x1’。
The verification was performed again, examining |1.24 × x1’/(1+x1’)—1.24*x0/(1+x0) Whether | is greater than |1.24 × 1/(1+ x)1’)—1.24*1/(1+x0)|。
If so, (M- Δ M) is again decreased by Δ M, corresponding to (M-2 × Δ M).
If so, the effect due to the change in external conditions is considered to have been eliminated.
Wherein in case of this greater, the verification is continued and the Δ M is continued to be reduced depending on the result. Until a situation arises.
If |1.24 x1’/(1+x1’)—1.24*x0/(1+x0) I is less than |1.24 x 1/(1+ x)1’)— 1.24*1/(1+x0) L, illustrate Δ (M V)2) Less than Δ V1. The first coefficient M is adjusted so that the first coefficient M becomes M + Δ M. Thus, V will be formedREF(T1)+ΔM*V2(T1)。
Measuring a second regulated voltage (M + Δ M) V again using the second analog-to-digital conversion module2(T1)The digital output of the second analog-to-digital conversion module is (M + delta M) × V2(T1)/VREF(T1)＝(M+ΔM) *V2(T1)/V1(T1)＝x1’。
The verification was performed again, examining |1.24 × x1’/(1+x1’)—1.24*x0/(1+x0) Whether | is less than |1.24 × 1/(1+ x)1’)—1.24*1/(1+x0)|。
If less, then (M- Δ M) is increased again by Δ M, corresponding to (M +2 × Δ M). Until a situation arises.
According to a further embodiment of the present disclosure, a voltage generation method is also provided. Fig. 5 illustrates a flow diagram of a voltage generation method 2000 in accordance with the present disclosure.
In step 2002, at a first time T0, the first coefficient M value and/or the second coefficient N value are adjusted such that the output voltage V of the addition unit at the first time T0REF(T0)Is a first reference voltage value VRFor example, the first reference voltage value may be equal to 1.24V, etc., and in the present disclosure, the specific voltage value is not specifically limited, and is used as an example.
In step 2004, at a first time T0, a first voltage V is measured and obtained by using a first analog-to-digital conversion module and a second analog-to-digital conversion module respectively1(T0)First adjusting voltage N V1(T0)And a second voltage V2(T0)Second adjustment voltage M V2(T0). In addition, in the present disclosure, the output voltage of the addition module at the first time T0 is also measured, thereby obtaining the reference voltage VREF(T0)。
In step 2006, a first regulated voltage N x V is measured using the first and second analog-to-digital conversion modules, respectively1(T0)And the second toneIntegral voltage M V2(T0)Thus, the first adjustment voltage N x V can be obtained by the analog-to-digital conversion unit1(T0)First digital signal D of1(T0)And a second adjustment voltage M V2(T0)Second digital signal D2(T0)。
Wherein D is1(T0)May be equal to N V1(T0)/VREF(T0). Wherein VREF(T0)Which is the voltage output by the summing block at a first time T0. D2(T0)May be equal to M V2(T0)/VREF(T0)。
Thus, M V2(T0)/(N*V1(T0))＝D2(T0)/D1(T0)＝x0。
At this time, N is V1(T0)＝VREF(T0)*1/(1+x0)，M*V2(T0)＝VREF(T0)*x0/(1+x0)。
In step 2008, at a second time T1 (the second time T1 is a time after the first time T0), the first adjustment voltage N × V is measured by using the first analog-to-digital conversion module and the second analog-to-digital conversion module respectively1(T0)And a second regulated voltage M V2(T1)In addition, in the present disclosure, the output voltage of the addition module at the second time T1 is also measured, thereby obtaining the reference voltage VREF(T1). In step 2010, the first adjustment voltage N × V may be obtained by the analog-to-digital conversion unit1(T0)First digital signal D of1(T1)And a second adjustment voltage M V2(T1)Second digital signal D2(T1)。
In step 2012, the variation value of the first adjustment voltage is compared with the variation value of the second adjustment voltage, and if they are not equal, step 2014 is performed for adjustment, and after adjustment, the method continues to step 2012 for comparison again, and if they are equal, step 2016 is performed.
Wherein D is1(T1)May be equal to N V1(T1)/VREF(T1). Wherein VREF(T1)Which is the voltage output by the summing block at a second time T1. D2(T1)May be equal to M V2(T1)/VREF(T1)。
Thus M V2(T1)/N*V1(T1)＝D2(T1)/D1(T1)＝x1。
At this time, N is V1(T1)＝VREF(T1)*1/(1+x1)，M*V2(T1)＝VREF(T1)*x1/(1+x1)。
When the first adjustment voltage and the second adjustment voltage change from the first time T0 to the second time T1, the adjustment can be performed by referring to the same principle as the embodiment shown in fig. 1, and the details are not repeated here. For example, in the case of adjusting the coefficient M in the above embodiment, for example, such that the first coefficient M becomes M + Δ M, these manners may be adopted in this manner: 1. adjust only the first coefficient M to M + Δ M, 2 adjust only the second coefficient N to N- Δ N, or 3 adjust both the first coefficient M and the second coefficient N such that M + Δ M, and N- Δ N. These methods can be used for adjustment again.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.
Claims (17)
1. A voltage generation unit, comprising:
the first voltage generating module is used for generating a first voltage;
the second voltage generation module is used for generating a second voltage;
a second voltage adjustment module for receiving the second voltage and adjusting the second voltage to output a second adjusted voltage;
a control module, which receives the first voltage and the second adjustment voltage, and controls a second voltage adjustment module to adjust the second voltage based on the information related to the first voltage and/or the information related to the second adjustment voltage; and
a summing module that receives the first voltage and a second adjusted voltage and generates a third voltage,
wherein the control module controls the second voltage adjustment module based on a difference between a first voltage difference value at two times and a second adjustment voltage difference value at two times.
2. The voltage generation unit of claim 1, further comprising:
the first analog-to-digital conversion module is used for acquiring the first voltage, performing analog-to-digital conversion on the first voltage and providing a converted first digital signal to the control module; and
and the second analog-to-digital conversion module is used for acquiring the second adjustment voltage, performing analog-to-digital conversion on the second adjustment voltage and providing a converted second digital signal to the control module.
3. The voltage generation unit of claim 2, wherein the first and second analog-to-digital conversion modules use the third voltage as a benchmarking voltage to convert the first voltage to a first digital signal and the second adjusted voltage to a second digital signal.
4. The voltage generation unit of claim 3, wherein the second voltage adjustment module includes a second coefficient adjustment module and a second multiplication module, the control module controls adjustment of the second coefficient, and the second multiplication module multiplies the adjusted second coefficient by the second voltage to obtain the second adjusted voltage.
5. The voltage generating unit of claim 4,
the control module judges whether a first difference value between a first digital signal of a first voltage at a first moment and a first digital signal of the first voltage at a second moment is equal to a second difference value between a second digital signal of a second adjustment voltage at the first moment and a second digital signal of the second adjustment voltage at the second moment, and adjusts the second coefficient if the first difference value is not equal to the second difference value.
6. The voltage generation unit of claim 5, wherein at the first time, the second coefficient is adjusted such that a third voltage at the first time is equal to a desired voltage.
7. The voltage generation unit of claim 5, wherein if the second difference is greater than the first difference, the second coefficient is decreased, and a second difference between a second digital signal of a second adjustment voltage generated based on the decreased second coefficient and a second digital signal of a second adjustment voltage at the first time is compared with the first difference, and if the second difference is not equal, the second coefficient is continuously decreased until the second difference is equal to the first difference.
8. The voltage generation unit of claim 5, wherein if the second difference is smaller than the first difference, the second coefficient is increased, and a second difference between a second digital signal of a second adjustment voltage generated based on the increased second coefficient and a second digital signal of a second adjustment voltage at the first time is compared with the first difference, and if the second difference is not equal, the second coefficient is continuously increased until the second difference is equal to the first difference.
9. The voltage generation unit of claim 4, further comprising: a first voltage adjusting module, wherein the first voltage adjusting module comprises a first coefficient adjusting module and a first multiplying module, the control module controls the adjustment of the first coefficient, the first multiplying module multiplies the adjusted first coefficient by the first voltage to obtain a first adjusted voltage, the first adjusted voltage is provided to the control module, and the control module controls the first voltage adjusting module and/or the second voltage adjusting module to adjust the first voltage and/or the second voltage based on the related information of the first adjusted voltage and/or the related information of the second adjusted voltage.
10. The voltage generating unit of claim 9,
the control module judges whether a first difference value between a first digital signal of a first adjustment voltage at a first moment and a first digital signal of the first adjustment voltage at a second moment is equal to a second difference value between a second digital signal of a second adjustment voltage at the first moment and a second digital signal of the second adjustment voltage at the second moment, and adjusts the first coefficient and/or the second coefficient if the first difference value is not equal to the second difference value.
11. The voltage generation unit of claim 10, wherein at the first time instant, the first coefficient and/or the second coefficient are adjusted such that a third voltage at the first time instant is equal to a desired voltage.
12. The voltage generation unit of claim 10, wherein if the second difference is greater than the first difference, the second coefficient is decreased and/or the first coefficient is increased, the first difference and the second difference are obtained again, and the first difference and the second difference are continuously compared, and if not equal, the second coefficient is decreased and/or the first coefficient is increased until the second difference is equal to the first difference.
13. The voltage generation unit of claim 10, wherein if the second difference is less than the first difference, increasing the second coefficient and/or decreasing the first coefficient, then obtaining the first difference and the second difference again, and continuing to compare the first difference and the second difference, if not equal, then continuing to increase the second coefficient and/or decrease the first coefficient until the second difference is equal to the first difference.
14. The voltage generation unit according to any one of claims 1 to 13, wherein the first voltage generated by the first voltage generation module and the second voltage generated by the second voltage generation module are voltages that vary depending on external conditions.
15. The voltage generating unit of claim 14, wherein the external condition is temperature, current, and/or voltage.
16. The voltage generating unit of claim 15,
the first voltage is a positive temperature coefficient voltage and the second voltage is a negative temperature coefficient voltage, or
The first voltage is a positive current coefficient voltage and the second voltage is a negative current coefficient voltage, or
The first voltage is a positive voltage coefficient voltage and the second voltage is a negative voltage coefficient voltage.
17. An electronic device, characterized by comprising a voltage generation unit according to any one of claims 1 to 16, which forms a reference voltage of the electronic device.
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