CN104977469A - Measurement circuit used for integrated circuit design and measurement method used for integrated circuit design - Google Patents
Measurement circuit used for integrated circuit design and measurement method used for integrated circuit design Download PDFInfo
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- CN104977469A CN104977469A CN201410136719.8A CN201410136719A CN104977469A CN 104977469 A CN104977469 A CN 104977469A CN 201410136719 A CN201410136719 A CN 201410136719A CN 104977469 A CN104977469 A CN 104977469A
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Abstract
The present invention discloses a measurement circuit used for integrated circuit design and a measurement method used for integrated circuit design, wherein the measurement circuit used for integrated circuit design comprises a fuse; a first measurement circuit connected with the fuse and comprising a first measurement end, wherein the first measurement end is used to add a voltage to the first measurement circuit to measure the resistance value of the first measurement circuit; a second measurement circuit having the same resistance value with the first measurement circuit and comprising a second measurement end, wherein the second measurement end is used to add a voltage to the second measurement circuit to measure the resistance value of the second measurement circuit. According to the present invention, the problem in the prior art that the resistance value of the fuse of an IP nuclear grade can not be measured accurately is solved, and further the effect that the resistance value of the fuse of the IP nuclear grade can be measured accurately is realized.
Description
Technical field
The present invention relates to integrated circuit (IC) design field, in particular to a kind of metering circuit for integrated circuit (IC) design and method.
Background technology
Along with the Theory and technology of fuse is ripe gradually, the range of application of fuse expands rapidly.The resistance value of fuse before and after fusing is the key index of the integrated circuit (IC) design of whole fuse module.Usually the fuse cell adopted in prior art from power supply to ground successively by PMOS, fuse and NMOS series connection obtain, for such framework, a difficult point to the measurement of its resistance value, because the voltage of measurement point is directly connected across grid and the source terminal of PMOS, its electric current presents quadratic power speed increment along with the voltage of measurement point, is not easy to control.If electric current is too little, PMOS opens not, and measuring accuracy is too poor; If electric current too greatly, may damage fuse or secondary fuses.Like this, just cannot the resistance value of fuse of Measurement accuracy IP level.
The method of traditional measurement fuse makes integrated circuit (IC) design at unit stage and intellectual property core (IntellectualProperty Core, referred to as IP kernel) there is the difference of a PMOS in the level stage, this difference can only carry out making up of part based on a large amount of emulation and the measurement in later stage, makes the inaccurate of measurement result.In addition, in the unit stage, generally the programmed point short circuit of all unit can be become a bit, therefore measuring resistance also can only be measured one by one successively, has a strong impact on the measuring speed in unit stage.
For cannot the problem of resistance value of fuse of Measurement accuracy IP kernel level in prior art, at present effective solution be not yet proposed.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of metering circuit for integrated circuit (IC) design and method, cannot the problem of resistance value of fuse resistor of Measurement accuracy IP kernel level to solve in prior art.
To achieve these goals, according to a further aspect in the invention, a kind of metering circuit for integrated circuit (IC) design is provided.Metering circuit for integrated circuit (IC) design according to the present invention comprises: fuse; First metering circuit, is connected with fuse, comprises the first measuring junction, and the first measuring junction is used for the first metering circuit making alive to measure the resistance value of the first metering circuit; And second metering circuit, the second metering circuit is identical with the resistance value of the first metering circuit, comprises the second measuring junction, and the second measuring junction is used for the second metering circuit making alive to measure the resistance value of the second metering circuit.
Further, the first metering circuit comprises: the first Survey control transmission gate, and the first end of the first Survey control transmission gate is connected with the first measuring junction; First Read-write Catrol transmission gate, the first end of the first Read-write Catrol transmission gate is connected with the second end of the first Survey control transmission gate, second end of the first Read-write Catrol transmission gate is connected with the first end of fuse, wherein, the grid of the first Read-write Catrol transmission gate is connected with the grid of the first Survey control transmission gate; First nmos switch, the first end of the first nmos switch is connected with the second end of fuse, the second end ground connection of the first nmos switch, the grounded-grid of the first nmos switch; And a PMOS, the first end of a PMOS is connected with the second end of the first Read-write Catrol transmission gate, and is connected with the first end of fuse.
Further, the second metering circuit comprises: the second Survey control transmission gate, and the first end of the second Survey control transmission gate is connected with the second measuring junction; Second Read-write Catrol transmission gate, the first end of the second Read-write Catrol transmission gate is connected with the second end of the second Survey control transmission gate; Second nmos switch, the first end of the second nmos switch is connected with the second end of the second Read-write Catrol transmission gate, the second end ground connection of the second nmos switch, the grounded-grid of the second nmos switch; And the 2nd PMOS, the first end of the 2nd PMOS is connected with the second end of the second Read-write Catrol transmission gate, and is connected with the first end of the second nmos switch.
Further, the first metering circuit is connected with the second metering circuit, and wherein, the resistance value of fuse is obtained by the resistance value of the first metering circuit and the resistance value of the second metering circuit.
To achieve these goals, according to an aspect of the present invention, a kind of measuring method of the metering circuit for integrated circuit (IC) design is provided.Measuring method according to the metering circuit for integrated circuit (IC) design of the present invention comprises: metering circuit comprises the first metering circuit and the second metering circuit, first metering circuit is connected with fuse, measuring method comprises: the resistance value measuring connecting circuit, obtain the first resistance value, wherein, connecting circuit comprises fuse and the first metering circuit, and the first resistance value is the resistance value of the first metering circuit and the resistance value sum of fuse; Measure the resistance value of the second metering circuit, obtain the second resistance value; Calculate the difference of the first resistance value and the second resistance value; And using the resistance value of difference as fuse.
Further, the first metering circuit comprises the first measuring junction, and the resistance value measuring connecting circuit comprises: add the first voltage at the first measuring junction; Measure the current value of connecting circuit, obtain the first current value; And obtain the first resistance value according to the magnitude of voltage of the first voltage and the first current value.
Further, before the first measuring junction adds the first voltage, measuring method also comprises: obtain scheduled voltage; Obtain the anticipation resistance value of fuse; Using the business of scheduled voltage and anticipation resistance value as anticipation current value; And determine the first magnitude of voltage according to anticipation current value.
Further, using the business of scheduled voltage and anticipation resistance value as after anticipation current value, measuring method also comprises: judge anticipation current value whether within the scope of pre-set current value; If judge that anticipation current value is within the scope of pre-set current value, then using scheduled voltage as the first voltage; And if judge that anticipation current value is not within the scope of pre-set current value, then according to anticipation current value adjustment scheduled voltage.
Further, if judge that anticipation current value is not within the scope of pre-set current value, then comprise according to anticipation current value adjustment predetermined voltage: judge whether anticipation current value is less than pre-set current value scope;
If judge that anticipation current value is less than pre-set current value scope, then increase scheduled voltage; And
If judge that anticipation current value is greater than pre-set current value scope, then reduce scheduled voltage.
Further, the second metering circuit comprises the second measuring junction, and the resistance value measuring the second metering circuit comprises: add the second voltage at the second measuring junction, and wherein, the second voltage is identical with the magnitude of voltage of the first voltage; Measure the current value of the second metering circuit, obtain the second current value; And obtain the second resistance value according to the second voltage and the second current value.
By the present invention, adopt fuse; First metering circuit, is connected with fuse, comprises the first measuring junction, and the first measuring junction is used for the first metering circuit making alive to measure the resistance value of the first metering circuit; And second metering circuit, second metering circuit is identical with the resistance value of the first metering circuit, comprise the second measuring junction, second measuring junction is used for the second metering circuit making alive to measure the resistance value of the second metering circuit, solving in prior art cannot the problem of resistance value of fuse of Measurement accuracy IP kernel level, and then reaches the effect of resistance value of fuse of Measurement accuracy IP kernel level.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the circuit diagram of the metering circuit for integrated circuit (IC) design according to the embodiment of the present invention;
Fig. 2 is the process flow diagram of the measuring method of the metering circuit of integrated circuit (IC) design according to the embodiment of the present invention; And
Fig. 3 is the process flow diagram of determination first voltage according to the embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
Embodiments provide a kind of metering circuit for integrated circuit (IC) design.
Fig. 1 is the circuit diagram of the metering circuit for integrated circuit (IC) design according to the embodiment of the present invention.This circuit diagram schematically illustrates the metering circuit for integrated circuit (IC) design of the embodiment of the present invention, is described the metering circuit for integrated circuit (IC) design that the embodiment of the present invention provides below in conjunction with Fig. 1.
As shown in the figure, this metering circuit being used for integrated circuit (IC) design comprises fuse R, the first metering circuit and the second metering circuit.
First metering circuit is connected with fuse, comprises the first measuring junction, and the first measuring junction is used for the first metering circuit making alive to measure the resistance value of the first metering circuit.
Second metering circuit is identical with the resistance value of the first metering circuit, comprises the second measuring junction, and the second measuring junction is used for the second metering circuit making alive to measure the resistance value of the second metering circuit.
Further, the first metering circuit comprises the first Survey control transmission gate N1, the first Read-write Catrol transmission gate N2, the first nmos switch N3 and a PMOS P1.Wherein, the first end of the first Survey control transmission gate N1 is connected with the first measuring junction.The first end of the first Read-write Catrol transmission gate N2 is connected with second end of the first Survey control transmission gate N1, second end of the first Read-write Catrol transmission gate N2 is connected with the first end of fuse, wherein, the grid of the first Read-write Catrol transmission gate N2 is connected with the grid of the first Survey control transmission gate N1.The first end of the first nmos switch N3 is connected with the second end of fuse, the second end ground connection of the first nmos switch N3, the grounded-grid of the first nmos switch N3.The first end of the one PMOS P1 is connected with second end of the first Read-write Catrol transmission gate N2, and is connected with the first end of fuse R.
First measuring junction is connected with the first end of the first Survey control transmission gate N1.First Survey control transmission gate N1, the first Read-write Catrol transmission gate N2 and the first nmos switch N3 all can use nmos device, and a PMOS P1 can be PMOS device.
In the first metering circuit, be connected with fuse R, fuse R is connected between the first Read-write Catrol transmission gate N2 and the first nmos switch N3, by measuring the resistance value that can obtain the first metering circuit and fuse R.
Further, the second metering circuit comprises the second Survey control transmission gate N4, the second Read-write Catrol transmission gate N5, the second nmos switch N6 and the 2nd PMOS P2.Wherein, the first end of the second Survey control transmission gate N4 is connected with the second measuring junction.The first end of the second Read-write Catrol transmission gate N5 is connected with the second end of the second Survey control transmission gate.The first end of the second nmos switch N6 is connected with the second end of the second Read-write Catrol transmission gate, the second end ground connection of the second nmos switch, the grounded-grid of the second nmos switch.And the 2nd the first end of PMOS P2 be connected with the second end of the second Read-write Catrol transmission gate, and to be connected with the first end of the second nmos switch.
Second measuring junction is connected with the first end of the second Survey control transmission gate N4.Second Survey control transmission gate N4, the second Read-write Catrol transmission gate N5 and the second nmos switch N6 all can use nmos device, and the 2nd PMOSP2 can be PMOS device.Wherein, second Survey control transmission gate N4 of the second metering circuit, second Read-write Catrol transmission gate N5 and the second nmos switch N6 all can with nmos device respectively at the first Survey control transmission gate N1 in the first metering circuit, first Read-write Catrol transmission gate N2 and the first nmos switch N3 one_to_one corresponding, and, the nmos device used in first metering circuit can be identical with the nmos device used in the second metering circuit, same, the PMOS device used in first metering circuit can be identical with the PMOS device used in the second metering circuit, therefore, when adding identical voltage to the first metering circuit and the second metering circuit, the current value that can record the first metering circuit is identical with the current value of the second metering circuit, and then the resistance value recording the first metering circuit is identical with the resistance value of the second metering circuit.
Further, the first metering circuit is connected with the second metering circuit, and wherein, the resistance value of fuse is obtained by the resistance value of the first metering circuit and the resistance value of the second metering circuit.
Because when the first metering circuit does not connect fuse R, when adding identical voltage to the first metering circuit and the second metering circuit, the resistance value that can record the first metering circuit is identical with the resistance value of the second metering circuit, so, after fuse R being connected in the first metering circuit, by the current value of the first metering circuit that records and the current value of the second metering circuit can obtain the resistance value of fuse R and the first metering circuit and, and second resistance value of metering circuit, identical with the resistance value of the second metering circuit according to the resistance value recording the first metering circuit again, obtain the resistance value of fuse R and the first metering circuit and obtain the resistance value of fuse R with the difference of the resistance value of the second metering circuit.
The electric current ratio of the first metering circuit and the second metering circuit is easier to measure, and the method for metering circuit electric current in prior art can be adopted to measure.
Above-mentioned in the metering circuit of integrated circuit (IC) design, directly can measure the resistance value of fuse R, and without the need to also to carry out after recording resistance as prior art emulate and the later stage measurement make up, by to after the resistance value of the first metering circuit and fuse R and the resistance value of the second metering circuit get difference, accurately can obtain the resistance value of fuse R, avoid being subject to the impact of PMOS and the inaccurate problem of measurement that causes, thus improve the accuracy of the resistance value measuring fuse R.
The embodiment of the present invention additionally provides a kind of measuring method for integrated circuit (IC) design.
Fig. 2 is the process flow diagram of the measuring method of the metering circuit of integrated circuit (IC) design according to the embodiment of the present invention.As shown in the figure, this measuring method comprises the steps:
Step S202, measure the resistance value of connecting circuit, obtain the first resistance value, wherein, connecting circuit comprises fuse and the first metering circuit, and the first resistance value is the resistance value of the first metering circuit and the resistance value sum of fuse.
From the metering circuit for integrated circuit (IC) design of the embodiment of the present invention, metering circuit comprises the first metering circuit and the second metering circuit, and the first metering circuit is connected with fuse.
Step S204, measures the resistance value of the second metering circuit, obtains the second resistance value.
Step S206, calculates the difference of the first resistance value and the second resistance value.
Step S208, using the resistance value of difference as fuse.
Because the first metering circuit is identical with the resistance value of the second metering circuit, be added in the first metering circuit also identical with the voltage of the second metering circuit, connecting circuit only includes the first metering circuit and fuse R, then can obtain the resistance value of fuse R by the resistance value that the resistance value of connecting circuit deducts the second metering circuit.The resistance value of direct measurement connecting circuit and the second metering circuit can not be subject to the impact of PMOS, the resistance value of difference as fuse R can more accurately be gone.
Preferably, in order to improve the measuring accuracy of the resistance value measuring fuse R, by controlling the measuring accuracy being added in the resistance value of the magnitude of voltage control survey fuse R of the first metering circuit and the second metering circuit.Particularly, the first metering circuit comprises the first measuring junction, and the resistance value measuring connecting circuit comprises the steps:
The first voltage is added at the first measuring junction.
Measure the current value of connecting circuit, obtain the first current value.
The first resistance value is obtained according to the magnitude of voltage of the first voltage and the first current value.
After the first measuring junction adds the first voltage, measure the first current value of connecting circuit, can obtain the first resistance value according to Ohm law, the first resistance value is the resistance value of connecting circuit, is the resistance value sum of fuse R and the first metering circuit.
Preferably, in order to improve the precision of measurement, before the first measuring junction adds the first voltage, measuring method also comprises the steps, concrete steps as shown in Figure 3:
Step S302, obtains scheduled voltage.
Step S304, obtains the anticipation resistance value of fuse.
Step S306, using the business of scheduled voltage and anticipation resistance value as anticipation current value.
Step S308, determines the first voltage according to anticipation current value.
The precision measuring fuse R can be affected because scheduled voltage is added in the first measuring junction and the second measuring junction as the first voltage.Such as, when scheduled voltage is too small, measure the electric current obtained too small, represent that fuse R has been fused the region of high value, the region of general high value for being greater than three kilohms, then needs the voltage higher than scheduled voltage as the first magnitude of voltage; But that the first magnitude of voltage can not be adjusted is too high, the measuring error that the threshold value loss in order to avoid the first Survey control transmission gate N1 causes.
In order to determine the first voltage further, using the business of scheduled voltage and anticipation resistance value as after anticipation current value, this measuring method also comprises: judge anticipation current value whether within the scope of pre-set current value.If judge that anticipation current value is within the scope of pre-set current value, then using scheduled voltage as the first voltage.If judge that anticipation current value is not within the scope of pre-set current value, then according to anticipation current value adjustment scheduled voltage.
The result that the first voltage makes to measure is more accurate to utilize the anticipation current value within the scope of pre-set current value to determine, such as, be 100 ohm at hypothesis fuse not fusing the resistance value in situation, and pre-set current value scope is 0.8mA to 1.2mA, then anticipation current value is more close to 1mA, and the resistance value of the fuse obtained as the first voltage measurement by scheduled voltage is more accurate.
Further, if judge that anticipation current value is not within the scope of pre-set current value, then comprise according to anticipation current value adjustment predetermined voltage:
Judge whether anticipation current value is less than pre-set current value scope.
If judge that anticipation current value is less than pre-set current value scope, then increase scheduled voltage.
If judge that anticipation current value is greater than pre-set current value scope, then reduce scheduled voltage.
When being 100 ohm according to the anticipation current value resistance value that is 1mA and hypothesis, using the voltage of 0.1V as the first voltage, then the first current value of connecting circuit is measured, if it is too small to measure the current value obtained, then illustrate that fuse is fused to the region of high value, change a higher voltage so again, such as using the film of 0.5V as the first voltage, but, the amplitude of the voltage increased can not be excessive, using the measuring error that the threshold value loss avoided as the NMOS of testing and control transmission gate causes.If the first current value utilizing 0.1V to obtain as the first voltage measurement is comparatively remarkable, then prove that fuse is also in low resistance region, directly can carry out the calculating of resistance value as the first voltage with 0.1V.
Because the second metering circuit is identical with the resistance value of the first metering circuit, connecting circuit differs fuse R with the first metering circuit, then utilize the difference of connecting circuit and the second metering circuit accurately can obtain the resistance value of fuse R, second metering circuit comprises the second measuring junction, the resistance value measuring the second metering circuit comprises: add the second voltage at the second measuring junction, wherein, second voltage is identical with the magnitude of voltage of the first voltage, measure the second metering circuit current value, obtain the second current value, obtain the second resistance value according to the second voltage and the second current value.
Second voltage is identical with the magnitude of voltage of the first voltage, after then determining the magnitude of voltage of the first voltage, identical voltage is added to the first measuring junction and the second measuring junction, then the current value of connecting circuit and the current value of the second metering circuit is measured, then utilize Ohm law to calculate the resistance value of connecting circuit and the resistance value of the second metering circuit, the difference finally calculating the resistance value of connecting circuit and the resistance value of the second metering circuit obtains the resistance value of fuse R.
By said method, utilize the first metering circuit identical with the resistance value of the second metering circuit, use Ohm law to record the resistance value of the second metering circuit and the resistance value of connecting circuit, accurately obtain the resistance value of fuse R, thus make measurement result more accurate.In addition, owing to directly can be measured the resistance value of the fuse R of IP kernel level circuit by said method, the character of IP kernel level then can be utilized to measure the resistance value of multiple fuse R simultaneously, the resistance value of multiple fuse is measured in such as 8 bit parallel IO input and output simultaneously, improves the efficiency measuring fuse resistor value.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. for a metering circuit for integrated circuit (IC) design, it is characterized in that, comprising:
Fuse;
First metering circuit, is connected with described fuse, comprises the first measuring junction, and described first measuring junction is used for described first metering circuit making alive to measure the resistance value of described first metering circuit; And
Second metering circuit, described second metering circuit is identical with the resistance value of described first metering circuit, comprises the second measuring junction, and described second measuring junction is used for the second metering circuit making alive to measure the resistance value of described second metering circuit.
2. metering circuit according to claim 1, is characterized in that, described first metering circuit comprises:
First Survey control transmission gate, the first end of described first Survey control transmission gate is connected with described first measuring junction;
First Read-write Catrol transmission gate, the first end of described first Read-write Catrol transmission gate is connected with the second end of described first Survey control transmission gate, second end of described first Read-write Catrol transmission gate is connected with the first end of described fuse, wherein, the grid of described first Read-write Catrol transmission gate is connected with the grid of described first Survey control transmission gate;
First nmos switch, the first end of described first nmos switch is connected with the second end of described fuse, the second end ground connection of described first nmos switch, the grounded-grid of described first nmos switch; And
The first end of the one PMOS, a described PMOS is connected with the second end of described first Read-write Catrol transmission gate, and is connected with the first end of described fuse.
3. metering circuit according to claim 1, is characterized in that, described second metering circuit comprises:
Second Survey control transmission gate, the first end of described second Survey control transmission gate is connected with described second measuring junction;
Second Read-write Catrol transmission gate, the first end of described second Read-write Catrol transmission gate is connected with the second end of described second Survey control transmission gate;
Second nmos switch, the first end of described second nmos switch is connected with the second end of described second Read-write Catrol transmission gate, the second end ground connection of described second nmos switch, the grounded-grid of described second nmos switch; And
The first end of the 2nd PMOS, described 2nd PMOS is connected with the second end of described second Read-write Catrol transmission gate, and is connected with the first end of described second nmos switch.
4. metering circuit according to claim 1, is characterized in that, comprising:
Described first metering circuit is connected with described second metering circuit, and wherein, the resistance value of described fuse is obtained by the resistance value of described first metering circuit and the resistance value of described second metering circuit.
5. for a measuring method for integrated circuit (IC) design, it is characterized in that, described metering circuit comprises the first metering circuit and the second metering circuit, and the first metering circuit is connected with fuse, and described measuring method comprises:
Measure the resistance value of connecting circuit, obtain the first resistance value, wherein, described connecting circuit comprises described fuse and described first metering circuit, and described first resistance value is the resistance value of described first metering circuit and the resistance value sum of described fuse;
Measure the resistance value of described second metering circuit, obtain the second resistance value;
Calculate the difference of described first resistance value and described second resistance value; And
Using the resistance value of described difference as described fuse.
6. measuring method according to claim 5, is characterized in that, described first metering circuit comprises the first measuring junction, and the resistance value measuring described connecting circuit comprises:
The first voltage is added at described first measuring junction;
Measure the current value of described connecting circuit, obtain the first current value; And
Described first resistance value is obtained according to the magnitude of voltage of described first voltage and described first current value.
7. measuring method according to claim 6, is characterized in that, before described first measuring junction adds the first voltage, described measuring method also comprises:
Obtain scheduled voltage;
Obtain the anticipation resistance value of described fuse;
Using the business of described scheduled voltage and described anticipation resistance value as anticipation current value; And
Described first magnitude of voltage is determined according to described anticipation current value.
8. measuring method according to claim 7, is characterized in that, using the business of described scheduled voltage and described anticipation resistance value as after anticipation current value, described measuring method also comprises:
Judge described anticipation current value whether within the scope of pre-set current value;
If judge that described anticipation current value is within the scope of described pre-set current value, then using described scheduled voltage as described first voltage; And
If judge that described anticipation current value is not within the scope of described pre-set current value, then adjust described scheduled voltage according to described anticipation current value.
9. measuring method according to claim 8, is characterized in that, if judge that described anticipation current value is not within the scope of described pre-set current value, then adjust described predetermined voltage according to described anticipation current value and comprise:
Judge whether described anticipation current value is less than described pre-set current value scope;
If judge that described anticipation current value is less than described pre-set current value scope, then increase described scheduled voltage; And
If judge that described anticipation current value is greater than described pre-set current value scope, then reduce described scheduled voltage.
10. measuring method according to claim 9, is characterized in that, described second metering circuit comprises the second measuring junction, and the resistance value measuring described second metering circuit comprises:
Add the second voltage at described second measuring junction, wherein, described second voltage is identical with the magnitude of voltage of described first voltage;
Measure described second metering circuit current value, obtain the second current value; And
Described second resistance value is obtained according to described second voltage and described second current value.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI817501B (en) * | 2021-12-08 | 2023-10-01 | 南亞科技股份有限公司 | System and method of measuring fuse resistance and non-transitory computer readable medium |
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| WO2010050673A2 (en) * | 2008-10-30 | 2010-05-06 | 한국표준과학연구원 | Resistance measuring apparatus and measuring method |
| CN101937717A (en) * | 2009-06-30 | 2011-01-05 | 台湾积体电路制造股份有限公司 | Method and circuit for measuring electrical resistance |
| CN102955070A (en) * | 2011-08-17 | 2013-03-06 | 鸿富锦精密工业（深圳）有限公司 | Resistance measuring circuit |
| CN103134990A (en) * | 2013-02-20 | 2013-06-05 | 上海华力微电子有限公司 | Resistance test method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI817501B (en) * | 2021-12-08 | 2023-10-01 | 南亞科技股份有限公司 | System and method of measuring fuse resistance and non-transitory computer readable medium |
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