CN203117831U - Pedestal generator and corresponding integrated circuit - Google Patents
Pedestal generator and corresponding integrated circuit Download PDFInfo
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- CN203117831U CN203117831U CN 201220669201 CN201220669201U CN203117831U CN 203117831 U CN203117831 U CN 203117831U CN 201220669201 CN201220669201 CN 201220669201 CN 201220669201 U CN201220669201 U CN 201220669201U CN 203117831 U CN203117831 U CN 203117831U
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- pedestal generator
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- pmos pipe
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Abstract
The utility model provides a pedestal generator and a corresponding integrated circuit. The pedestal generator comprises a current mirror, a resistive element and a voltage stabilization element, wherein the current mirror is connected between an input voltage and the ground and comprises a source current branch and an image current branch; the resistive element is connected in the source current branch in series; the voltage stabilization element is connected in the image current branch in series; an image current generated in the image current branch can be operated so as to meet the requirement of a working current of the voltage stabilization element; and one end of the voltage stabilization element is used as a reference voltage output end. With the adoption of the implementation manner of the utility model, the pedestal generator can be used for providing the smaller variation range of current and lower power consumption for the application of the input voltage with the larger variation range, thus being beneficial to the operation of the high-voltage and low-power-consumption integrated circuit. The pedestal generator particularly has the advantages in the application in need of the smaller current at a standby state.
Description
Technical field
Each embodiment of the present utility model relates generally to complementary metal oxide semiconductor (CMOS) (CMOS) high voltage low power consumption integrated circuit, and relates more specifically to pedestal generator and corresponding integrated circuit for the high voltage low power consumption integrated circuit.
Background technology
Pedestal generator is for the fundamental block that generates coarse reference voltage at high-voltage integrated circuit.As shown in fig. 1, the structure of traditional pedestal generator is to connect with current-limiting resistor (Rlim) with Zener (zener), thereby produces reference voltage (VZ), and wherein supply voltage (VDDH) is input voltage.
Yet, in the pedestal generator shown in Fig. 1, when input voltage increases, be very difficult to realize low-power consumption.And when input voltage changed, the electric current in the pedestal generator can change in huge range, and wherein the variation range of input voltage is more big, and the variation range of electric current also can be more big.
According to the characteristic of Zener, its electric current need could guarantee its output stable benchmark voltage greater than its minimum breakdown current (Imin).With reference to shown in Figure 1, can obtain following formula:
Imin=(VDDHmin-VZ)/Rlim; And
Imax＝(VDDHmax-VZ)/Rlim。
The Imin minimum breakdown current for needing in the pedestal generator to satisfy as mentioned above wherein, Imax is the maximum current in the pedestal generator, VDDHmin is the minimum input voltage of pedestal generator, VDDHmax is the maximum input voltage of pedestal generator, VZ is the reference voltage that pedestal generator is realized, Rlim is the resistance of current-limiting resistor.
Be that 6V and Imin are that 10 μ A are example with input voltage changing between the 7V to 18V, needing the VZ that realizes, can calculate by above-mentioned formula that the Rlim that uses in need the pedestal generator in Fig. 1 is 100k Ω, thereby Imax is 120 μ A.Hence one can see that, and the ratio of maximum current Imax and minimum breakdown current Imin is 120 μ A/10 μ A=1200% in the pedestal generator among Fig. 1, and namely wherein maximum current Imax is 12 times of minimum breakdown current Imin.Above-mentioned input voltage only is for example between 7V to 18V, present high-pressure process can so that input voltage up to 100V, thereby make that the ratio of maximum current Imax in the pedestal generator and minimum breakdown current Imin may be much larger than above-mentioned 12 times, thereby the normal use of high voltage low power consumption integrated circuit is caused serious harmful effect.
Hence one can see that, and there is the excessive shortcoming of electric current variation range in the pedestal generator when input voltage changes greatly in traditional pedestal generator.
The utility model content
Illustrative embodiments of the present utility model relates to the pedestal generator for the high voltage low power consumption integrated circuit.
There is the excessive technical matters of electric current variation range in the pedestal generator when input voltage changes greatly in the novel embodiment of this use at traditional pedestal generator.
In an embodiment of the present utility model, a kind of pedestal generator is provided, comprising: current mirror, be connected between input voltage and the ground, comprise source current branch and image current branch road; Resistance element is connected in series in this source current branch; And voltage stabilizing element, be connected in series in this image current branch road, wherein the image current that produces in this image current branch road can operate to satisfy the working current requirement of this voltage stabilizing element, and an end of this voltage stabilizing element is as reference voltage output end.
In one embodiment, current mirror comprises the first transistor that is connected in this source current branch and the transistor seconds that is connected in this image current branch road.
In one embodiment, this the first transistor and this transistor seconds all are PMOS pipes, the source electrode of the source electrode of the one PMOS pipe and the 2nd PMOS pipe is connected to this input voltage, the grid of the grid of the one PMOS pipe and the 2nd PMOS pipe links together, the grid of the one PMOS pipe is connected with drain electrode, one end of this resistance element is connected to the drain electrode of a PMOS pipe and the other end ground connection of this resistance element, and an end of this voltage stabilizing element is connected to the drain electrode of the 2nd PMOS pipe and the other end ground connection of this voltage stabilizing element.
In one embodiment, the width of the 2nd PMOS pipe is 1 to 10 times of width of a PMOS pipe.
In one embodiment, this resistance element comprises a resistance or a NMOS pipe.
In one embodiment, this voltage stabilizing element comprises a Zener or a diode.
In one embodiment, this pedestal generator also comprises an amplifying circuit, and an input end of this amplifying circuit is connected with this end of this voltage stabilizing element, and the output terminal of this amplifying circuit is as this reference voltage output end.
In one embodiment, this input voltage is the arbitrary predetermined value among the 7V to 100V.
In one embodiment, also provide a kind of integrated circuit, it comprises according to aforesaid pedestal generator.
Embodiment of the present utility model has the following advantages, be that embodiment of the present utility model provides the low-power consumption pedestal generator that is used for the high voltage low power consumption integrated circuit, application for the input voltage with big variation range provides the electric current of littler variation range and lower power consumption, thereby help the running of high voltage low power consumption integrated circuit, especially when standby, need have advantage in the application of less electric current.
Description of drawings
Also with reference to following detailed description, the feature of each embodiment of the utility model, advantage and other aspects will become more obvious, show some embodiments of the present utility model at this in exemplary and nonrestrictive mode by reference to the accompanying drawings.In the accompanying drawings:
Fig. 1 is the circuit diagram according to traditional pedestal generator of prior art; And
Fig. 2 is the circuit diagram according to the pedestal generator that is used for the high voltage low power consumption integrated circuit of illustrative embodiments of the present utility model.
Embodiment
Describe each illustrative embodiments of the present utility model in detail below with reference to accompanying drawing.Should be noted that according to following description and will readily recognize that the alternate embodiment of structure disclosed herein and they are used as operable embodiments possible under the prerequisite that does not deviate from principle of the present utility model and spirit.
Should be appreciated that providing these illustrative embodiments only is for those skilled in the art can being understood better and then realize the utility model, and be not to limit scope of the present utility model by any way.
With reference to Fig. 2, it is the circuit diagram according to the pedestal generator that is used for the high voltage low power consumption integrated circuit of illustrative embodiments of the present utility model.
As shown in Figure 2, according to pedestal generator of the present utility model comprise parallel with one another between input voltage (VDDH) and ground connection about two branch roads.Wherein, being P-channel metal-oxide-semiconductor (PMOS) pipe and current-limiting resistor (Rlim) of series connection in the left branch road, is P-channel metal-oxide-semiconductor (PMOS) pipe and Zener (zener) of series connection in the right branch road.Wherein, about the grid of PMOS pipe in two branch roads link together, about the source electrode of PMOS pipe in two branch roads all be connected to input voltage, the grid of the PMOS pipe in the left branch road is connected with drain electrode.Since about grid and grid, source electrode and the source electrode of PMOS pipe in two branch roads link together, so their gate source voltage (VGS) is equal.Because the electric current the during conducting of PMOS pipe depends primarily on size and the VGS of PMOS pipe, therefore two PMOS pipes arranging according to said elements form current mirror, wherein use the PMOS pipe to produce electric current in the left branch road, right branch road then will pour in the Zener of right branch road after the current mirror that produce.Wherein, when about two PMOS pipes when being of a size of 1: 1, in left branch road, produce electric current after, can in right branch road, produce identical image current; When about two PMOS pipes be of a size of 1: during N, in left branch road, produce electric current after, can in right branch road, produce N image current doubly.
In illustrative embodiments of the present utility model, with about two PMOS pipe sizes equate to be that example is carried out exemplary illustration.
Character according to the PMOS pipe, when must the voltage on being applied to the PMOS pipe reaching threshold voltage (beginning voltage), the PMOS pipe could begin operate as normal, so in the pedestal generator in Fig. 2, if the threshold voltage of the PMOS pipe in the left branch road is VT, then can obtain following formula:
Imax/Imin＝(VDDHmax-VT)/(VDDHmin-VT)。
Wherein, Imin needs to be the satisfied minimum breakdown current of Zener (Zener) in the pedestal generator, Imax is the maximum current in each branch road in the pedestal generator, VDDHmin is the minimum input voltage of pedestal generator, VDDHmax is the maximum input voltage of pedestal generator, and VT is the threshold voltage of the PMOS pipe in the left branch road as mentioned above.
With input voltage change between the 7V to 18V, VT is that 1V and Imin are that 10 μ A are example, can calculate by above-mentioned formula, the Rlim that uses in need the pedestal generator in Fig. 1 is 600k, thereby Imax is 28.3 μ A.Hence one can see that, maximum current Imax in the pedestal generator among Fig. 1 in each branch road and the ratio of minimum breakdown current Imin also are total maximum current with the ratio of total minimum current is 28.3 μ A/10 μ A=283%, and namely wherein maximum current Imax is 2.83 times of minimum breakdown current Imin.The description of contrast in background technology as can be known, under the situation of the variation range unanimity of input voltage, according to the ratio of the maximum current Imax in the pedestal generator of illustrative embodiments of the present utility model and minimum breakdown current Imin in traditional pedestal generator maximum current Imax and the ratio of minimum breakdown current Imin, and it is according to the maximum current in the pedestal generator of illustrative embodiments of the present utility model (28.3 μ A * 2=56.6 μ A) the also maximum current (120 μ A) in traditional pedestal generator, therefore lower according to the pedestal generator of illustrative embodiments of the present utility model power consumption when input voltage has big variation range.
As previously mentioned, owing to can will be designed to be in proportion according to the PMOS pipe in the current mirror in the pedestal generator of illustrative embodiments of the present utility model, therefore thereby can be by under the prerequisite that PMOS pipe in the left branch road is designed to the little minimum breakdown current that makes the Zener in can satisfying right branch road of PMOS pipe than right branch road the electric current in the left branch road being reduced, thereby can make total current and total power consumption in the whole pedestal generator littler.
It should be noted that, although can be by adjusting the size according to two PMOS pipes in the current mirror in the pedestal generator of illustrative embodiments of the present utility model, but two PMOS pipe magnitude proportion need be determined according to actual conditions, wherein especially need to consider the design cost of pedestal generator and the influence that electric leakage may cause.Because if the design of two PMOS pipe magnitude proportion is too much, then can cause the occupied area of PMOS pipe excessive, thereby cause the raising of integrated circuit total cost.Simultaneously, when being designed to be the excessive electric current that causes one of them PMOS pipe owing to two PMOS pipe magnitude proportion when too small, this electric current might be flooded by electric leakage, thereby causes the pedestal generator can't normal operation.According to the assessment that the influence that may cause design cost and electric leakage is carried out, preferably two PMOS pipe magnitude proportion are no more than 10 times usually.
Can be to carrying out various processing so that it can be used for multiple purpose by the tight reference voltage (VZ) of giving birth to of pedestal generator according to illustrative embodiments of the present utility model.For example, because the reference voltage that produces does not have current driving ability and only be a voltage, therefore can be for it increase current driving ability, thus make and can utilize reference voltage to drive other elements and/or circuit.Wherein, the reference voltage that has been increased current driving ability can serve as the power supply use.
Be to be understood that, in according to illustrative embodiments of the present utility model, adopt the current mirror of being realized by two PMOS pipes to realize technique effect of the present utility model, but can be applicable to that current mirror of the present utility model is not limited in by two PMOS pipes realizes, but can have more complicated structure.That is, may be used to the utility model so long as can realize by the electric current in a branch road current-mirror structure that in another branch road, produces image current.
Be to be understood that, although use Zener to realize pedestal generator according to illustrative embodiments of the present utility model in the above-described embodiment, but also can realize pedestal generator by using other voltage stabilizing elements (device) such as general-purpose diode, because they also have the stability that can satisfy the pedestal generator requirement.Generally, in various exemplary embodiments of the present utility model, use voltage stabilizing element that variation range may be become stable voltage by very big current transformation, thereby produce stable benchmark voltage.
But, for general-purpose diode, in pedestal generator, use the benefit of Zener no matter to be how big Zener applied electric current, as long as this electric current reaches the minimum breakdown current (Imin) of Zener, the reference voltage that then produces is more stable, and this is because Zener is different with the stability curve slope of general-purpose diode.Simultaneously, use the size of the reference voltage that the pedestal generator of Zener and general-purpose diode produces also can there are differences respectively.For instance, when electric current became big 10 times, the reference voltage that the pedestal generator of use Zener produces may become 6.1V from 6V, and the reference voltage that the pedestal generator of use general-purpose diode produces may become 0.8V from 0.7V.Wherein, though the reference voltage of the 0.7V that is produced by the pedestal generator that uses general-purpose diode may be low slightly as benchmark, can amplify it, thereby realize pedestal generator similar effects with the use Zener.
Should be appreciated that and in according to illustrative embodiments of the present utility model, use current-limiting resistor Rlim only to be example.Only needs use and can play the resistor effect that is similar to, become the resistance element (resistive load) of electric current to get final product voltage transitions in according to the pedestal generator of illustrative embodiments of the present utility model, and do not need it is defined as resistor.For example, can use N NMOS N-channel MOS N (NMOS) pipe to replace current-limiting resistor Rlim as resistance element.
Be to be understood that from foregoing description, under the situation that does not break away from the utility model true spirit, can make amendment and change each embodiment of the present utility model, for example, change into and use general-purpose diode as voltage stabilizing element or use the NMOS pipe as resistance element; Can adopt normal transistor rather than metal-oxide-semiconductor to realize current mirror (still, the current mirror power consumption that adopts metal-oxide-semiconductor to realize is less).Description in this instructions is only used for illustrative, and should not be considered to restrictive.
Though described the utility model with reference to some embodiments, should be appreciated that the utility model is not limited to disclosed embodiment.The utility model is intended to be encompassed in interior included various modifications and the equivalent arrangements of spirit and scope of claims.The scope of claims meets the most wide in range explanation, thereby comprises all such modifications and equivalent structure and function.
Claims (9)
1. a pedestal generator is characterized in that, comprising:
Current mirror is connected between input voltage and the ground, comprises source current branch and image current branch road;
Resistance element is connected in series in the current branch of described source; And
Voltage stabilizing element is connected in series in the described image current branch road, and the image current that produces in the wherein said image current branch road can operate to satisfy the working current requirement of described voltage stabilizing element, and an end of described voltage stabilizing element is as reference voltage output end.
2. pedestal generator according to claim 1 is characterized in that, described current mirror comprises the first transistor that is connected in the current branch of described source and the transistor seconds that is connected in the described image current branch road.
3. pedestal generator according to claim 2, it is characterized in that, described the first transistor and described transistor seconds all are PMOS pipes, the source electrode of the source electrode of the one PMOS pipe and the 2nd PMOS pipe is connected to described input voltage, the grid of the grid of a described PMOS pipe and described the 2nd PMOS pipe links together, the grid of a described PMOS pipe is connected with drain electrode, one end of described resistance element is connected to the drain electrode of a described PMOS pipe and the other end ground connection of described resistance element, and an end of described voltage stabilizing element is connected to the drain electrode of described the 2nd PMOS pipe and the other end ground connection of described voltage stabilizing element.
4. according to claim 2 or 3 described pedestal generators, it is characterized in that the width of described the 2nd PMOS pipe is 1 to 10 times of width of a described PMOS pipe.
5. according to each described pedestal generator in the claim 1 to 3, it is characterized in that described resistance element comprises a resistance or a NMOS pipe.
6. according to each described pedestal generator in the claim 1 to 3, it is characterized in that described voltage stabilizing element comprises a Zener or a diode.
7. according to each described pedestal generator in the claim 1 to 3, it is characterized in that, also comprise an amplifying circuit, an input end of described amplifying circuit is connected with a described end of described voltage stabilizing element, and the output terminal of described amplifying circuit is as described reference voltage output end.
8. pedestal generator according to claim 7 is characterized in that, described input voltage is the arbitrary predetermined value among the 7V to 100V.
9. an integrated circuit is characterized in that, comprises according to each described pedestal generator in the claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220669201 CN203117831U (en) | 2012-12-05 | 2012-12-05 | Pedestal generator and corresponding integrated circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220669201 CN203117831U (en) | 2012-12-05 | 2012-12-05 | Pedestal generator and corresponding integrated circuit |
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| CN203117831U true CN203117831U (en) | 2013-08-07 |
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| CN 201220669201 Expired - Lifetime CN203117831U (en) | 2012-12-05 | 2012-12-05 | Pedestal generator and corresponding integrated circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103853229A (en) * | 2012-12-05 | 2014-06-11 | 艾尔瓦特集成电路科技（天津）有限公司 | Reference voltage generator and corresponding integrated circuit |
| CN103956906A (en) * | 2014-04-21 | 2014-07-30 | 华为技术有限公司 | Feedback control circuit |
| CN116795167A (en) * | 2023-08-29 | 2023-09-22 | 厦门优迅高速芯片有限公司 | Current mirror structure circuit and method for realizing low-voltage input work |
-
2012
- 2012-12-05 CN CN 201220669201 patent/CN203117831U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103853229A (en) * | 2012-12-05 | 2014-06-11 | 艾尔瓦特集成电路科技（天津）有限公司 | Reference voltage generator and corresponding integrated circuit |
| CN103956906A (en) * | 2014-04-21 | 2014-07-30 | 华为技术有限公司 | Feedback control circuit |
| CN103956906B (en) * | 2014-04-21 | 2016-07-27 | 华为技术有限公司 | A kind of feedback control circuit |
| CN116795167A (en) * | 2023-08-29 | 2023-09-22 | 厦门优迅高速芯片有限公司 | Current mirror structure circuit and method for realizing low-voltage input work |
| CN116795167B (en) * | 2023-08-29 | 2023-11-21 | 厦门优迅高速芯片有限公司 | Current mirror structure circuit and method for realizing low-voltage input work |
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Address after: 300457, room 2, building 19, No. 2701-2 West Ring Road, Tanggu economic and Technological Development Zone, Tianjin, China Patentee after: IWATT INTEGRATED CIRCUITS TECHNOLOGY (TIANJIN) LTD. Address before: 300457, room 2, building 19, No. 2701-2 West Ring Road, Tanggu economic and Technological Development Zone, Tianjin, China Patentee before: iWatt Integrated Circuits Technology (Tianjin) Ltd. |
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Granted publication date: 20130807 |