WO2006041063A1 - タイミング発生器、及び試験装置 - Google Patents
タイミング発生器、及び試験装置 Download PDFInfo
- Publication number
- WO2006041063A1 WO2006041063A1 PCT/JP2005/018709 JP2005018709W WO2006041063A1 WO 2006041063 A1 WO2006041063 A1 WO 2006041063A1 JP 2005018709 W JP2005018709 W JP 2005018709W WO 2006041063 A1 WO2006041063 A1 WO 2006041063A1
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- WIPO (PCT)
- Prior art keywords
- delay
- pulse
- output
- unit
- signal
- Prior art date
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- 238000012360 testing method Methods 0.000 title claims description 31
- 230000001934 delay Effects 0.000 claims description 5
- 230000003111 delayed effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000020169 heat generation Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/317—Testing of digital circuits
- G01R31/3181—Functional testing
- G01R31/319—Tester hardware, i.e. output processing circuits
- G01R31/31917—Stimuli generation or application of test patterns to the device under test [DUT]
- G01R31/31922—Timing generation or clock distribution
Definitions
- the present invention relates to a timing generator that generates a timing signal based on a given reference clock, and a test apparatus that includes the timing generator.
- the present invention relates to a timing generator with a stable calorific value.
- Patent application 2004 299321 Filing date October 13, 2004
- the number of pulses passing through the delay circuit and the pulse pattern differ depending on the pulse pattern selected in the logic gate, and the amount of heat generated in the delay circuit differs. For this reason, the delay amount in the delay circuit fluctuates and jitter is generated in the generated clock. Such jitter is not allowed in high-precision LSIs.
- a circuit further provided with a dummy delay circuit is known.
- the circuit inputs the pulses that are not input to the delay circuit for clock generation, among the pulses of the given reference clock, into the dummy delay circuit, so that the total in these delay circuits is independent of the generated clock pattern.
- the calorific value is kept constant.
- an object of the present invention is to provide a timing generator and a test apparatus that can solve the above-described problems. This object is achieved by a combination of features described in the independent claims.
- the dependent claims define further advantageous specific examples of the present invention.
- a timing generator for generating a timing signal based on a given reference clock, each of the reference clocks. These pulses are delayed by an amount of delay given for each pulse, and a delay circuit unit, and among the pulses output by the delay circuit unit, only a pulse to be output as a timing signal is passed and output.
- a timing generator including a pulse selection output unit.
- the timing generator captures delay setting data for controlling the delay amount in the delay circuit unit in accordance with the pulse output from the delay circuit unit, and delays in the delay circuit unit based on the captured delay setting data.
- a delay amount control unit that controls the amount may be further provided.
- the delay circuit unit includes a plurality of delay elements connected in cascade, and the delay amount control unit includes a plurality of delay setting flip-flops provided corresponding to the plurality of delay elements.
- the delay setting flip-flop may take in the delay setting data in accordance with the pulse output from the corresponding delay element, and control the delay amount of the corresponding delay element based on the fetched delay setting data.
- the timing generator further includes a pulse selection flip-flop that supplies a pulse selection signal indicating whether or not to pass the pulse to the pulse selection output unit in response to the pulse output from the delay element in the final stage. You may be prepared.
- the timing generator indicates a logical value H when passing through the pulse selection output unit in synchronization with the pulse of the reference clock given to the delay circuit unit, and passes through the pulse.
- a pulse selection control unit that receives a pulse selection signal indicating a logical value L and supplies the pulse selection signal to the pulse selection output unit when the signal is not to be generated, and the pulse selection control unit is connected in cascade corresponding to a plurality of delay elements. And a plurality of pulse selection flip-flops that sequentially capture and output pulse selection signals in response to pulses output from the corresponding delay elements, each delay setting flip-flop having a corresponding pulse selection flip-flop. The delay setting data does not need to be newly taken in while the logic block outputs the logical value L.
- the timing generator further includes a temperature compensation selection unit that controls whether all pulses of the reference clock are input to the delay circuit unit or whether only pulses to be output as timing signals are input to the delay circuit unit. Get ready ⁇ .
- the temperature compensation selection unit supplies a signal fixed to a logical value H as a pulse selection signal to the pulse selection control unit when only the noise to be output as a timing signal is input to the delay circuit unit. Good.
- a test apparatus for testing an electronic device, which generates a test pattern to be supplied to the electronic device, and supplies the test pattern to the electronic device.
- a timing generator that generates a timing signal for controlling timing based on a given reference clock
- a waveform shaping unit that supplies a test pattern to the electronic device according to the timing signal, and an output signal output from the electronic device.
- a timing circuit for delaying each pulse of the reference clock by a delay amount given for each pulse, and a delay circuit unit for determining whether the electronic device is good or bad.
- the pulses output from the circuit section select only the pulse that should be output as the timing signal and output it. Providing a test device and an output unit.
- a timing signal having a desired pattern can be generated with low jitter.
- FIG. 1 is a diagram showing an example of the configuration of a test apparatus 200 according to an embodiment of the present invention.
- FIG. 2 is a diagram showing an example of the configuration of the timing generator 20.
- FIG. 3 is a timing chart showing an example of the operation of the timing generator 20.
- FIG. 4 is a diagram showing another example of the configuration of the timing generator 20.
- FIG. 1 is a diagram showing an example of the configuration of a test apparatus 100 according to an embodiment of the present invention.
- the test apparatus 100 is an apparatus for testing an electronic device 200 such as a semiconductor circuit, and includes a pattern generator 10, a waveform shaper 12, a determiner 14, and a timing generator 20.
- the no-turn generator 10 generates a test pattern for testing the electronic device 200.
- the test pattern is a digital signal represented by a 1ZO pattern, for example.
- the waveform shaper 12 generates an input signal to be input to the electronic device 200 based on the test pattern. For example, an input signal that takes a voltage value corresponding to the test pattern is generated at each given timing.
- the timing generator 20 generates a timing clock having a desired pattern and supplies it to the waveform shaper 12.
- the waveform shaper 12 generates a voltage according to the test pattern in accordance with the timing clock.
- the determiner 14 compares the signal output from the electronic device 200 with a given expected value signal to determine whether the electronic device 200 is good or bad.
- the expected signal is generated by the pattern generator 10 based on the test pattern.
- FIG. 2 is a diagram illustrating an example of the configuration of the timing generator 20.
- the timing generator 20 is a circuit that generates a timing signal based on a given reference clock, and includes a delay circuit unit 23, a pulse selection output unit 28, a pulser 22, a delay amount control unit 35, a pulse selection flip-flop 32, A flip-flop 30 and a flip-flop 34 are included.
- the timing generator 20 is supplied with a reference clock having a predetermined frequency and a pulse selection signal and delay setting data corresponding to the timing signal pattern to be output.
- the pulser 22 receives the reference clock, adjusts the pulse width of the reference clock to a predetermined pulse width, and outputs it.
- the delay circuit unit 23 delays each pulse of the reference clock output from the pulsar 22 by a delay amount given for each pulse, and outputs the delayed pulse. That is, the phase of each pulse is controlled in accordance with the given delay setting data.
- the delay circuit unit 23 in this example includes a plurality of cascaded delay elements (24, 26).
- the maximum delay amount in the delay element 26 is substantially equal to the delay resolution in the delay element 24, and the phase of each pulse is controlled by the sum of the delay amounts in the delay element 24 and the delay element 26.
- the pulse selection output unit 28 passes and outputs only the pulse to be output as the timing signal among the pulses output from the delay circuit unit 23.
- the pulse selection output unit 28 is a logical product circuit, and outputs a logical product of the noise output from the delay circuit unit 23 and the pulse selection signal provided from the pulse selection flip-flop 32.
- Pulse selection signal The number is mask data indicating 1 at the timing of the pulse to be output and 0 at the timing of the pulse not to be output.
- the flip-flop 30 receives the pulse selection signal and outputs the pulse selection signal to the pulse selection flip-flop 32 in synchronization with the reference clock. That is, the flip-flop 30 receives the pulse selection signal at the data input terminal and the reference clock at the clock input terminal.
- the pulse selection signal is a signal indicating whether or not each of the reference clocks should be output as a timing signal, and is given to the flip-flop 30 in synchronization with the corresponding pulse.
- the pulse selection flip-flop 32 supplies a pulse selection signal to the pulse selection output unit 28 in accordance with the last delay element in the delay circuit unit 23, that is, the pulse output from the delay element 26. That is, the pulse selection flip-flop 32 receives the pulse selection signal at the data input terminal and the signal output from the delay element 26 at the clock input terminal. With such a configuration, regardless of the delay amount in the delay circuit unit 23, it is possible to control whether or not the pulse selection output unit 28 is capable of passing each pulse of the reference clock.
- the setup signal has a sufficient setup time for the pulse output from the pulse selection flip-flop 32 and the pulse output from the pulse selection flip-flop 32.
- a delay element fixed to a predetermined delay amount may be further provided therebetween.
- the flip-flop 34 receives the delay setting data and outputs the delay setting data to the delay amount control unit 35 in synchronization with the reference clock. That is, the flip-flop 34 receives the delay setting data at the data input terminal and the reference clock at the clock input terminal.
- the delay setting data is data indicating a delay amount with respect to each pulse of the reference clock, and is given to the flip-flop 34 in synchronization with the previous pulse of the corresponding pulse.
- the delay amount control unit 35 controls the delay circuit unit 23 according to the pulse output from the delay circuit unit 23.
- the delay setting data for controlling the delay amount is fetched, and the delay amount in the delay circuit unit 23 is controlled based on the fetched delay setting data.
- the delay amount control unit 35 has a plurality of delay setting flip-flops (36, 38) provided corresponding to the plurality of delay elements (24, 26).
- Each delay setting flip-flop (36, 38) captures delay setting data in accordance with the pulse output from the corresponding delay element (24, 26), and based on the captured delay setting data, Controls the delay amount of elements (24, 26). That is, each time the delay element (24, 26) outputs a pulse, the delay amount for delaying the next pulse is set in each delay element (24, 26). By such an operation, the delay amount for each pulse can be set with high accuracy.
- the maximum delay amount in the delay element 26 is a case where a coarse delay is generated in the delay element 24 that is substantially equal to the delay resolution in the delay element 24 and a fine delay is generated in the delay element 26.
- the delay setting flip-flop 36 corresponding to the delay element 24 controls the delay amount in the delay element 24 based on the upper bits of the data output from the flip-flop 34, and the delay setting flip-flop 38 corresponding to the delay element 26. Controls the amount of delay in the delay element 26 based on the lower bits of the data output from the flip-flop 34.
- each delay setting flip-flop (36, 38) receives delay setting data at the data input terminal, and receives a signal output from the corresponding delay element (24, 26) at the clock input terminal.
- the reference clock supplied to the timing generator 20 has been described as having a fixed period.
- the timing generator 20 generates an output signal of a desired pattern from an input signal of a desired pattern. Can be generated.
- FIG. 3 is a timing chart showing an example of the operation of the timing generator 20.
- the delay circuit unit 23 is provided with a reference clock having a constant period as shown in FIG.
- the delay circuit unit 23 delays each pulse of the reference clock by a delay amount given for each pulse.
- the delay circuit unit 23 is provided with delay setting data that satisfies the condition that the pulses of the delayed reference clock are not close to each other.
- the pulse selection output unit 28 indicates whether or not to output each pulse.
- a logical product of the pulse selection data and the reference clock delayed by the delay circuit unit 23 is output, and a timing signal having a desired pattern as shown in FIG. 3 is generated.
- the amount of heat generated can be kept substantially constant as described above, so that jitter can be reduced.
- a dummy delay circuit for keeping the heat generation amount constant is not required, interference due to pulses transmitted through the dummy delay circuit can be eliminated, and a timing signal can be generated with high accuracy.
- FIG. 4 is a diagram showing another example of the configuration of the timing generator 20.
- the timing generator 20 includes a delay circuit unit 41, a pulse selection output unit 48, a pulser 40, a delay amount control unit 67, a pulse selection control unit 59, a flip-flop 58, a flip-flop 66, and a temperature compensation selection unit 54. And a pulse selection input section 50 and an OR circuit 56.
- the pulser 40, the delay circuit unit 41, the pulse selection output unit 48, the pulse selection control unit 59, and the delay amount control unit 67 are the pulser 22, the delay circuit unit 23, and the pulse selection output described with reference to FIG. It has the same functions and configuration as the unit 28, the pulse selection flip-flop 32, and the delay amount control unit 35. First, these configurations will be described.
- the pulser 40 adjusts the pulse width of a given signal to a predetermined pulse width, and outputs it to the delay circuit unit 41.
- the delay circuit unit 41 has the same function and configuration as the delay circuit unit 23 described with reference to FIG.
- the delay circuit unit 41 in this example has a plurality of delay elements (42, 44, 46) connected in cascade. Similar to the delay circuit unit 23, the maximum delay amount of the delay element 44 is substantially the same as the delay resolution of the delay element 42, and the maximum delay amount of the delay element 46 is substantially the same as the delay resolution of the delay element 44. Good.
- the pulse selection control unit 59 In response to the reference clock pulse supplied to the delay circuit unit 41, the pulse selection control unit 59 indicates a logical value H when the pulse is passed through the pulse selection output unit 48. When the pulse selection signal is not passed, a pulse selection signal indicating a logical value L is received and the pulse selection signal is supplied to the pulse selection output unit 48. Similarly to the pulse selection output unit 28 described with reference to FIG. 2, the pulse selection output unit 48 calculates the logical product of the signal output from the delay circuit unit 41 and the pulse selection signal received from the pulse selection control unit 59. Output.
- the noise selection control unit 59 has a plurality of pulse selection flip-flops (60, 62, 64) provided in cascade connection corresponding to the plurality of delay elements (42, 44, 46).
- each The pulse selection flip-flops (60, 62, 64) sequentially take in the pulse selection signals according to the pulses output from the corresponding delay elements and output them to the next stage.
- the transmission of the pulse selection signal can be delayed according to the delay amount in each delay element (42, 44, 46), and the timing signal is accurately output in the pulse selection output unit 48. Can be generated.
- the delay amount control unit 67 has the same function and configuration as the delay amount control unit 35 described with reference to FIG.
- the delay amount control unit 67 in this example includes a plurality of delay setting flip-flops (68, 70, 72) provided corresponding to the plurality of delay elements (42, 44, 46). That is, the plurality of delay setting flip-flops (68, 70, 72) are also provided corresponding to the plurality of pulse selection flip-flops (60, 62, 64).
- the flip-flop 66 receives the delay setting data at the data input terminal, receives the pulse selection signal at the enable terminal, and receives the reference clock at the clock input terminal. That is, the delay setting data is taken in according to the pulse of the reference clock to be output as the timing signal and input to the delay amount control unit 67.
- Each delay setting flip-flop (68, 70, 72) takes a new delay setting data while the corresponding pulse selection flip-flop (60, 62, 64) outputs a logical value L. Don't put it. That is, each delay setting flip-flop (68, 70, 72) receives the delay setting data at the data input terminal, and receives the signal output from the corresponding delay element (42, 44, 46) at the clock input terminal. The signal output from the corresponding pulse selection flip-flop (60, 62, 64) is received at the enable terminal. That is, the pulses that are not output by the pulse selection output unit 48 are delayed by the same delay amount as the previous pulse. With such a configuration, it is not necessary to consider the proximity condition between a pulse output as a timing signal and a pulse after the pulse that is not output as a timing signal, and the timing signal can be easily generated. Can do.
- the temperature compensation selection unit 54 controls whether all pulses of the reference clock are input to the delay circuit unit 41 or only pulses to be output as timing signals are input to the delay circuit unit 41. That is, the temperature compensation selection unit 54 controls the heat generation amount in the timing generator 20 to be substantially constant and generates a timing signal, and generates the timing signal without controlling the heat generation amount. Select whether to generate.
- a timing signal with high accuracy may be required, or a timing signal may be required with low power consumption. It is possible to select whether to generate a timing signal with low power consumption by controlling the amount of heat generated, or with precision.
- the temperature compensation selection unit 54 includes the pulse selection signal described above with reference to FIG. 2, a signal fixed to a logical value H, and a temperature compensation selection signal indicating whether or not to perform temperature control in the delay circuit unit 41 ( HOCLK INH).
- the temperature compensation selection signal is a signal indicating a logical value L when temperature control is performed and a logical value H when temperature control is not performed! Then, when the temperature compensation selection signal is a signal indicating that the temperature control is performed, the temperature compensation selection unit 54 outputs a signal fixed to the logical value H, and indicates that the temperature compensation selection signal does not perform the temperature control. If it is the signal shown, a noise selection signal is output.
- the noise selection input unit 50 inputs the logical product of the supplied reference clock and the signal output from the temperature compensation selection unit 54 to the delay circuit unit 41 via the pulser 40. In other words, when the temperature control is not performed, only the pulse to be output as the timing signal is input to the delay circuit unit 41, and when the temperature control is performed, all the pulses of the reference clock are input as described above. Is done.
- the logical sum circuit 56 supplies the logical sum of the pulse selection signal and the temperature compensation selection signal to the flip-flop 58. That is, when performing temperature control, a pulse selection signal is supplied to the flip-flop 58. At this time, the operations of the flip-flop 58 and the pulse selection control unit 59 are as described above.
- the temperature compensation selection unit 54 is fixed to the logic value H as a pulse selection signal to the pulse selection control unit 59 via the OR circuit 56 and the flip-flop 58. Supply signal.
- the pulse selection control unit 59 outputs a signal fixed to the logical value H, so the pulse selection output unit 48 passes the signal output from the delay circuit unit 41 as it is. For this reason, the pulse already selected by the pulse selection input unit 50 can be passed.
- a device having an operation mode for generating a timing signal with low jitter and an operation mode for generating a timing signal with low power consumption can be realized with a small circuit configuration. can do.
- test apparatus 200 may include a plurality of the configurations of the timing generator 20 described above.
- each timing generator 20 generates timing signals of different patterns.
- the waveform shaper 12 has a circuit that generates a plurality of input signals of different patterns and inputs them to the respective pins of the electronic device 200, and which circuit uses the V and deviation timing signals. Have a multiplexer to choose from.
- a timing signal having a desired pattern can be generated with low jitter.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Electronic Circuits (AREA)
- Pulse Circuits (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112005002545T DE112005002545T5 (de) | 2004-10-13 | 2005-10-11 | Taktgenerator und Prüfvorrichtung |
US11/256,202 US7557560B2 (en) | 2004-10-13 | 2005-10-21 | Timing generator and test device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004299321A JP4669258B2 (ja) | 2004-10-13 | 2004-10-13 | タイミング発生器、及び試験装置 |
JP2004-299321 | 2004-10-13 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/256,202 Continuation US7557560B2 (en) | 2004-10-13 | 2005-10-21 | Timing generator and test device |
Publications (1)
Publication Number | Publication Date |
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WO2006041063A1 true WO2006041063A1 (ja) | 2006-04-20 |
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ID=36148354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/018709 WO2006041063A1 (ja) | 2004-10-13 | 2005-10-11 | タイミング発生器、及び試験装置 |
Country Status (4)
Country | Link |
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US (1) | US7557560B2 (ja) |
JP (1) | JP4669258B2 (ja) |
DE (1) | DE112005002545T5 (ja) |
WO (1) | WO2006041063A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2006035604A1 (ja) * | 2004-09-27 | 2006-04-06 | Advantest Corporation | 消費電流バランス回路、補償電流量調整方法、タイミング発生器及び半導体試験装置 |
CN102144166A (zh) | 2008-09-04 | 2011-08-03 | 株式会社爱德万测试 | 波形发生器和使用该波形发生器的测试装置 |
US10320386B1 (en) * | 2017-12-08 | 2019-06-11 | Xilinx, Inc. | Programmable pipeline interface circuit |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11304888A (ja) * | 1998-04-17 | 1999-11-05 | Advantest Corp | 半導体試験装置 |
JP2002261592A (ja) * | 2001-03-02 | 2002-09-13 | Advantest Corp | タイミング発生器及び試験装置 |
JP2003279629A (ja) * | 2002-01-18 | 2003-10-02 | Hitachi Ltd | パルス発生回路およびパルス発生回路を用いた半導体試験装置、および半導体試験方法および半導体装置の製造方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5293080A (en) * | 1990-10-09 | 1994-03-08 | Hewlett-Packard Company | Method and apparatus for generating test waveforms to be applied to a device under test |
JP4190662B2 (ja) * | 1999-06-18 | 2008-12-03 | エルピーダメモリ株式会社 | 半導体装置及びタイミング制御回路 |
JP4118463B2 (ja) * | 1999-07-23 | 2008-07-16 | 株式会社アドバンテスト | タイミング保持機能を搭載したic試験装置 |
WO2003010549A1 (en) * | 2001-07-27 | 2003-02-06 | Advantest Corporation | Timing generator and semiconductor test apparatus |
JP4279489B2 (ja) * | 2001-11-08 | 2009-06-17 | 株式会社アドバンテスト | タイミング発生器、及び試験装置 |
US7085982B2 (en) * | 2002-01-18 | 2006-08-01 | Hitachi, Ltd. | Pulse generation circuit and semiconductor tester that uses the pulse generation circuit |
JP2003216269A (ja) * | 2002-01-18 | 2003-07-31 | Mitsubishi Electric Corp | 半導体装置 |
KR100550634B1 (ko) * | 2003-10-31 | 2006-02-10 | 주식회사 하이닉스반도체 | 셀프리프레쉬 주기 발생 장치 |
US7453302B2 (en) * | 2003-12-23 | 2008-11-18 | Infineon Technologies Ag | Temperature compensated delay signals |
KR100626914B1 (ko) * | 2004-04-13 | 2006-09-20 | 주식회사 하이닉스반도체 | 셀프 리프레시 제어 회로 |
-
2004
- 2004-10-13 JP JP2004299321A patent/JP4669258B2/ja not_active Expired - Fee Related
-
2005
- 2005-10-11 DE DE112005002545T patent/DE112005002545T5/de not_active Withdrawn
- 2005-10-11 WO PCT/JP2005/018709 patent/WO2006041063A1/ja active Application Filing
- 2005-10-21 US US11/256,202 patent/US7557560B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11304888A (ja) * | 1998-04-17 | 1999-11-05 | Advantest Corp | 半導体試験装置 |
JP2002261592A (ja) * | 2001-03-02 | 2002-09-13 | Advantest Corp | タイミング発生器及び試験装置 |
JP2003279629A (ja) * | 2002-01-18 | 2003-10-02 | Hitachi Ltd | パルス発生回路およびパルス発生回路を用いた半導体試験装置、および半導体試験方法および半導体装置の製造方法 |
Also Published As
Publication number | Publication date |
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JP4669258B2 (ja) | 2011-04-13 |
DE112005002545T5 (de) | 2007-08-30 |
US20060087308A1 (en) | 2006-04-27 |
US7557560B2 (en) | 2009-07-07 |
JP2006112873A (ja) | 2006-04-27 |
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