JPH1138087A - Semiconductor test device - Google Patents

Semiconductor test device

Info

Publication number
JPH1138087A
JPH1138087A JP9195629A JP19562997A JPH1138087A JP H1138087 A JPH1138087 A JP H1138087A JP 9195629 A JP9195629 A JP 9195629A JP 19562997 A JP19562997 A JP 19562997A JP H1138087 A JPH1138087 A JP H1138087A
Authority
JP
Japan
Prior art keywords
output amplitude
correction
pin driver
delay
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9195629A
Other languages
Japanese (ja)
Inventor
Yukio Ishigaki
幸男 石垣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Advantest Corp
Original Assignee
Advantest Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Advantest Corp filed Critical Advantest Corp
Priority to JP9195629A priority Critical patent/JPH1138087A/en
Publication of JPH1138087A publication Critical patent/JPH1138087A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To reduce the temporary stop period of a device test and improve a throughput by receiving the change setting of the output amplitudes to pin drivers, and directly correcting the delay quantities of variable delay means for the timing correction due to the change of the output amplitudes of the pin drivers. SOLUTION: A register 21 latch-holds the delay quantity set values set to variable delay means VDi from a tester bus. A correction function equation 26 is a curve equation analogous to a correction curve. An amplitude correction quantity arithmetic section 24 feeds the result values correction-calculated with the delay quantities of the variable delay means VDi by the function equation 26 each time the voltage set data (VIHi, VILi) setting the output amplitudes of pin drivers are received to one input end of an adding means 22. The adding means 22 receives the delay quantity set values from the register 21 and the arithmetic values from the arithmetic section 24 and feeds the added results of them to the variable delay means VDi. The output timings are directly corrected to the same timing at an optional output amplitude.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は、半導体試験装置
において、被試験デバイスのICピンを駆動するピンド
ライバの出力振幅の設定変更に伴う出力タイミングの補
正に関する。
[0001] 1. Field of the Invention [0002] The present invention relates to correction of output timing accompanying a change in output amplitude setting of a pin driver for driving an IC pin of a device under test in a semiconductor test apparatus.

【0002】[0002]

【従来の技術】従来技術例について図4の半導体試験装
置のピンドライバの出力振幅設定に係る要部構成図と、
図5のピンドライバの出力振幅と出力タイミングとの関
係図を示して以下に説明する。尚、半導体試験装置は周
知であり技術的に良く知られている為、その説明を省略
する。
2. Description of the Related Art With respect to a prior art example, FIG.
The relationship between the output amplitude and the output timing of the pin driver of FIG. 5 will be described below. Since the semiconductor test device is well known and well known in the art, the description thereof is omitted.

【0003】被試験デバイス(DUT)のICピンに供
給されるドライバ波形は、図4に示すように、パターン
発生器(PG)からの試験パターン信号をフォーマット
コントローラ(FC)により所定に波形整形した後、可
変遅延手段VDi(ここでi=1〜nとする)により所定
タイミングに調整された後、ピンドライバDRiでハイ
/ローの出力振幅を所定振幅にした後、DUTのICピ
ンを駆動する。
As shown in FIG. 4, a driver waveform supplied to an IC pin of a device under test (DUT) is obtained by shaping a test pattern signal from a pattern generator (PG) into a predetermined waveform by a format controller (FC). Then, after being adjusted at a predetermined timing by a variable delay means VDi (here, i = 1 to n), the pin driver DRi sets the high / low output amplitude to a predetermined amplitude, and then drives the IC pin of the DUT. .

【0004】ところでピンドライバDRiの出力波形の
立上がりあるいは立ち下がりのスルーレートは出力振幅
に拘わらずほぼ同じ傾斜である為、出力振幅を変えると
出力タイミングがずれてしまう。この例を図5(a)に
示す。この例では可変遅延手段VDiの設定はそのまま
で、出力振幅を1V、2V、3Vに各々設定変更した場
合の立上がり波形の出力タイミング例である。この図で
例えば振幅50%点を出力タイミング点とすると各出力
振幅間でのタイミング差を生じてくることがわかる。こ
の為半導体試験装置では、ピンドライバDRiの出力振
幅の変更の都度、可変遅延手段VDiの設定値を設定更
新している。この結果、図5(b)の出力タイミング関
係図に示すように、出力振幅にかかわらず振幅50%点
は同一の出力タイミングにて使用に供することができ
る。
Since the rising or falling slew rate of the output waveform of the pin driver DRi has almost the same slope regardless of the output amplitude, the output timing is shifted when the output amplitude is changed. This example is shown in FIG. This example is an output timing example of a rising waveform when the output amplitude is changed to 1 V, 2 V, and 3 V while the setting of the variable delay means VDi is kept as it is. In this figure, it is understood that a timing difference occurs between the respective output amplitudes when, for example, the amplitude 50% point is set as the output timing point. Therefore, in the semiconductor test apparatus, the setting value of the variable delay means VDi is updated every time the output amplitude of the pin driver DRi is changed. As a result, as shown in the output timing relationship diagram of FIG. 5B, the 50% amplitude point can be used at the same output timing regardless of the output amplitude.

【0005】[0005]

【発明が解決しようとする課題】上述説明のように、ピ
ンドライバへの出力振幅の変更設定の都度、テスタバス
を介して該当するピンドライバの可変遅延手段VDiへ
設定値が転送される。ところでピンドライバDRiは1
テストヘッド当り多数の500〜1000チャンネル有
している。この為、全チャンネルに転送すると数ミリ秒
かかる。従って頻繁に出力振幅を変更する試験形態にお
いては設定値転送時間がかかってくる。当然ながらこの
転送期間はDUT試験が一時停止する期間である。この
点においてはデバイス試験のスループットの低下要因と
なり好ましくなく、実用上の難点がある。そこで、本発
明が解決しようとする課題は、ピンドライバの出力振幅
の変更に伴うタイミング補正を、ピンドライバへの出力
振幅の変更設定を受けて直接該当する可変遅延手段VD
iの遅延量を補正可能とした半導体試験装置を提供する
ことである。
As described above, each time the output amplitude is changed and set to the pin driver, the set value is transferred to the variable delay means VDi of the corresponding pin driver via the tester bus. By the way, the pin driver DRi is 1
The test head has a large number of 500 to 1000 channels. Therefore, it takes several milliseconds to transfer to all channels. Therefore, in a test mode in which the output amplitude is frequently changed, a set value transfer time is required. Naturally, this transfer period is a period during which the DUT test is temporarily stopped. This is not preferable because it causes a decrease in the throughput of the device test, and has a practical difficulty. Accordingly, the problem to be solved by the present invention is to correct the timing associated with the change in the output amplitude of the pin driver by directly changing the variable delay means VD in response to the setting for changing the output amplitude to the pin driver.
An object of the present invention is to provide a semiconductor test apparatus capable of correcting the delay amount of i.

【0006】[0006]

【課題を解決するための手段】第1図と第2図(a)と
第3図は、本発明に係る解決手段を示している。第1
に、上記課題を解決するために、本発明の構成では、被
試験デバイスを駆動するピンドライバDRiの出力振幅
を変えてデバイス試験をする半導体試験装置において、
ピンドライバDRiの出力振幅(VIHi、VILi)を
変えて各振幅レベル(例えば50%振幅レベル)におけ
るタイミング差を予め求め、この出力振幅に伴うタイミ
ング差をゼロに遅延量補正する補正関数式26の各項の
係数(例えば3次方程式の場合は各項の係数a,b,
c,d)を求める手段を具備し、ピンドライバDRiの
出力振幅を設定する電圧設定データ(VIHi、VIL
i)を受けた都度、補正関数式26(例えば補正関数f
(x))により可変遅延手段VDiの遅延量を補正演算
して可変遅延手段VDiの遅延設定値を直接更新する手
段を具備し、以上を各ピンドライバ毎に具備する構成手
段である。上述により、ピンドライバの出力振幅の変更
に伴うタイミング補正を、ピンドライバへの出力振幅の
変更設定を受けて直接該当する可変遅延手段VDiの遅
延量を補正可能とした半導体試験装置が実現できる。
FIG. 1, FIG. 2 (a) and FIG. 3 show a solution according to the present invention. First
In order to solve the above problems, the configuration of the present invention provides a semiconductor test apparatus for performing a device test by changing the output amplitude of a pin driver DRi that drives a device under test.
A correction function equation 26 for changing the output amplitude (VIHi, VILi) of the pin driver DRi to obtain a timing difference in each amplitude level (for example, a 50% amplitude level) in advance, and correcting the timing difference accompanying the output amplitude to a delay amount to zero. The coefficients of each term (for example, in the case of a cubic equation, the coefficients a, b,
c, d) and voltage setting data (VIHi, VIL) for setting the output amplitude of the pin driver DRi.
i), the correction function equation 26 (for example, the correction function f
(X)) means for correcting the amount of delay of the variable delay means VDi to directly update the delay set value of the variable delay means VDi, and the above means are provided for each pin driver. As described above, it is possible to realize a semiconductor test apparatus capable of correcting the timing associated with the change in the output amplitude of the pin driver and directly correcting the delay amount of the corresponding variable delay means VDi in response to the change setting of the output amplitude to the pin driver.

【0007】第2図(b)は、本発明に係る解決手段を
示している。第2に、上記課題を解決するために、本発
明の構成では、被試験デバイスを駆動するピンドライバ
DRiの出力振幅を変えてデバイス試験をする半導体試
験装置において、ピンドライバDRiの出力振幅(VI
Hi、VILi)を実際のデバイス試験に使用される出力
振幅に順次変え、各振幅レベル(例えば50%振幅レベ
ル)におけるタイミング差を予め求め、この出力振幅に
伴うタイミング差をゼロに遅延量補正する補正データを
求める手段を具備し、前記補正データを格納する補正テ
ーブル27を具備し、ピンドライバDRiの出力振幅を
設定する電圧設定データ(VIHi、VILi)を受けた
都度、上記補正テーブル27から出力振幅に対応する補
正データを読出して可変遅延手段VDiへの設定値を補
正演算して可変遅延手段VDiの遅延設定値を直接更新
する手段を具備し、以上を各ピンドライバ毎に具備する
構成手段がある。
FIG. 2 (b) shows a solution according to the present invention. Secondly, in order to solve the above problem, in the configuration of the present invention, in a semiconductor test apparatus for performing a device test by changing the output amplitude of a pin driver DRi for driving a device under test, the output amplitude (VI
Hi, VILi) are sequentially changed to output amplitudes used for actual device testing, a timing difference at each amplitude level (for example, 50% amplitude level) is obtained in advance, and the timing difference associated with the output amplitude is corrected to a delay amount of zero. A means for obtaining correction data; a correction table for storing the correction data; and an output from the correction table each time voltage setting data (VIHi, VILi) for setting the output amplitude of the pin driver DRi is received. Means for reading out correction data corresponding to the amplitude, correcting the set value to the variable delay means VDi, and directly updating the delay set value of the variable delay means VDi, and comprising the above for each pin driver There is.

【0008】第2図(c)は、本発明に係る解決手段を
示している。第3に、上記課題を解決するために、本発
明の構成では、被試験デバイスを駆動するピンドライバ
DRiの出力振幅を変えてデバイス試験をする半導体試
験装置において、ピンドライバDRiの出力振幅(VI
Hi、VILi)を実際のデバイス試験に使用される出力
振幅に順次変え、各振幅レベル(例えば50%振幅レベ
ル)におけるタイミング差を予め求め、この出力振幅に
伴うタイミング差をゼロに遅延量補正する遅延量設定デ
ータを求める手段を具備し、前記遅延量設定データを格
納する遅延量設定テーブル28を具備し、ピンドライバ
DRiの出力振幅を設定する電圧設定データ(VIHi、
VILi)を受けた都度、上記遅延量設定テーブル28
から出力振幅に対応する遅延量設定データを読出して可
変遅延手段VDiの遅延設定値を直接更新する手段を具
備し、以上を各ピンドライバ毎に具備する構成手段があ
る。
FIG. 2 (c) shows a solution according to the present invention. Third, in order to solve the above problem, in the configuration of the present invention, in a semiconductor test apparatus that performs a device test by changing the output amplitude of a pin driver DRi for driving a device under test, the output amplitude (VI
Hi, VILi) are sequentially changed to output amplitudes used for actual device testing, a timing difference at each amplitude level (for example, 50% amplitude level) is obtained in advance, and the timing difference associated with the output amplitude is corrected to a delay amount of zero. Means for obtaining delay amount setting data, a delay amount setting table 28 for storing the delay amount setting data, and voltage setting data (VIHi, VIHi,
Each time VILi) is received, the delay amount setting table 28
There is a means for reading out delay amount setting data corresponding to the output amplitude from the CPU and directly updating the delay setting value of the variable delay means VDi.

【0009】[0009]

【発明の実施の形態】以下に本発明の実施の形態を実施
例と共に図面を参照して詳細に説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings together with embodiments.

【0010】本発明実施例について図1の半導体試験装
置のピンドライバの出力振幅設定に係る要部構成図と、
図2の直接遅延量補正手段の構成例と、図3の補正曲線
の例を示して以下に説明する。尚、従来構成に対応する
要素は同一符号を付す。
FIG. 1 is a diagram showing a main configuration of an embodiment of the present invention relating to setting of an output amplitude of a pin driver of the semiconductor test apparatus of FIG. 1;
An example of the configuration of the direct delay amount correction means in FIG. 2 and an example of the correction curve in FIG. 3 will be described below. Elements corresponding to the conventional configuration are denoted by the same reference numerals.

【0011】本発明の要部構成は、従来構成に対してピ
ンドライバへの出力振幅の変更設定を受けて可変遅延手
段VDiへの直接遅延量補正手段20を各ピンドライバ
に追加した構成で成る。直接遅延量補正手段20の内部
構成例は、図2(a)に示すように、レジスタ21と、
加算手段22と、振幅補正量演算部24と、補正関数式
26とで成る。
The main configuration of the present invention is different from the conventional configuration in that the output amplitude change setting to the pin driver is changed and the direct delay amount correcting means 20 to the variable delay means VDi is added to each pin driver. . As shown in FIG. 2A, an example of the internal configuration of the direct delay amount correcting means 20 includes a register 21,
It comprises an adding means 22, an amplitude correction amount calculating section 24, and a correction function equation 26.

【0012】レジスタ21は、テスタバスから可変遅延
手段VDiへ設定される遅延量設定値をこのレジスタに
ラッチ保持するものである。補正関数式26は、補正曲
線に相似する曲線方程式である。例えば図3に示す補正
関数f(x)のように3次方程式の場合では、各項の係
数a,b,c,dの値は、複数の出力振幅における出力
タイミングのタイミング差を予め測定して求めておき、
このタイミング差をトレースする相似の関数f(x)と
なるように各項の係数a,b,c,dを予め求めてお
く。
The register 21 latches and holds a delay amount set value set from the tester bus to the variable delay means VDi. The correction function equation 26 is a curve equation similar to the correction curve. For example, in the case of a cubic equation such as the correction function f (x) shown in FIG. 3, the values of the coefficients a, b, c, and d of each term are obtained by previously measuring the timing difference between the output timings at a plurality of output amplitudes. And ask
The coefficients a, b, c, and d of the respective terms are obtained in advance so that a similar function f (x) for tracing the timing difference is obtained.

【0013】振幅補正量演算部24は、ピンドライバD
Riの出力振幅を設定する電圧設定データ(VIHi、V
ILi)を受けた都度、上記補正関数式26により可変
遅延手段VDiの遅延量を補正演算した結果値を加算手
段22の一方の入力端に供給する。加算手段22は、上
記レジスタ21からの遅延量設定値と、前記振幅補正量
演算部24からの補正演算値を受けて、両者を加算した
結果を、可変遅延手段VDiへ供給する。これによって
図5(b)に示すように直接的に任意の出力振幅におい
ても出力タイミングが同一タイミングに補正されること
となる。
The amplitude correction amount calculator 24 includes a pin driver D
Voltage setting data (VIHi, VHi) for setting the output amplitude of Ri
Each time ILi) is received, the result of correcting the delay amount of the variable delay means VDi by the correction function equation 26 is supplied to one input terminal of the adding means 22. The adder 22 receives the delay amount setting value from the register 21 and the correction operation value from the amplitude correction amount calculator 24, and supplies the result of adding both to the variable delay unit VDi. As a result, as shown in FIG. 5B, the output timing is directly corrected to the same timing even at an arbitrary output amplitude.

【0014】上述した発明構成によれば、ピンドライバ
DRiの出力振幅を設定する電圧設定データ(VIHi、
VILi)を受けた都度、所定の補正関数f(x)で直
接的に出力タイミングを補正する演算をして可変遅延手
段VDiの遅延量を補正する手段を具備する構成とした
ことにより、従来のようなテスタバスを介して可変遅延
手段VDiへ設定値を該当するピンドライバDRiチャン
ネル数の転送時間が無くなる結果、出力振幅を変更する
為の一時停止期間が大幅に削減できる利点が得られる。
According to the above-described invention, the voltage setting data (VIHi, VIHi,
(VILi), a means for directly correcting the output timing with a predetermined correction function f (x) to correct the delay amount of the variable delay means VDi is provided. As a result of eliminating the transfer time of the number of the pin driver DRi channels corresponding to the set value to the variable delay means VDi via the tester bus, there is obtained an advantage that the suspension period for changing the output amplitude can be greatly reduced.

【0015】尚、上述実施例の説明では、補正関数式2
6により任意の全ての出力振幅に対して出力タイミング
の補正適用が可能な場合で説明していたが、通常実用さ
れる出力振幅値は数点〜数十点程度である。この点に着
目して、所望により図2(b)、(c)に示す構成手段
としても良く、同様にして実施できる。即ち、第1の構
成手段は、補正関数式26の代わりに図2(b)に示す
ように、メモリによる補正テーブル27に補正値を格納
しておき、出力振幅に対応する補正データを読出して加
算手段22へ供給する構成手段である。この場合は通常
実用される出力振幅値を数十点程度に限定することで、
上述実施例に比較して容易に実現できる利点がある。第
2の構成手段は、図2(c)に示すように、ピンドライ
バDRiの出力振幅(VIH、VIL)を実際のデバイ
ス試験に使用される出力振幅に順次変え、各振幅レベル
(例えば50%振幅レベル)におけるタイミング差を予
め求め、この出力振幅に伴うタイミング差をゼロに遅延
量補正する遅延量設定データを求めて遅延量設定テーブ
ル28へ格納しておく。そして、電圧設定データ(VI
Hi、VILi)を受けた都度、遅延量設定テーブル28
から出力振幅に対応する遅延量設定データを読出して可
変遅延手段VDiの遅延設定値を更新する構成手段であ
る。この場合は通常実用される出力振幅値を数十点程度
に限定することで、上述実施例に比較して回路規模を低
減できる利点がある。
In the above description of the embodiment, the correction function equation 2
6 describes the case where the correction of the output timing can be applied to any and all output amplitudes. However, the output amplitude value that is normally used is about several to several tens. Focusing on this point, the constituent means shown in FIGS. 2 (b) and 2 (c) may be used if desired, and can be implemented in the same manner. That is, as shown in FIG. 2B, the first constituent means stores a correction value in a correction table 27 by a memory, instead of the correction function equation 26, and reads out correction data corresponding to the output amplitude. It is a configuration means for supplying to the addition means 22. In this case, by limiting the output amplitude value that is normally used to about several tens,
There is an advantage which can be easily realized as compared with the above embodiment. As shown in FIG. 2C, the second component sequentially changes the output amplitudes (VIH, VIL) of the pin driver DRi into output amplitudes used for actual device testing, and adjusts each amplitude level (for example, 50% A timing difference at the amplitude level is obtained in advance, and delay amount setting data for correcting the timing difference accompanying the output amplitude to zero is obtained and stored in the delay amount setting table. Then, the voltage setting data (VI
Hi, VILi) each time the delay amount setting table 28 is received.
From the delay amount setting data corresponding to the output amplitude, and updates the delay setting value of the variable delay means VDi. In this case, by limiting the normally used output amplitude value to about several tens, there is an advantage that the circuit scale can be reduced as compared with the above embodiment.

【0016】[0016]

【発明の効果】本発明は、上述の説明内容から、下記に
記載される効果を奏する。上述発明の構成によれば、ピ
ンドライバDRiの出力振幅を設定する電圧設定データ
(VIHi、VILi)を受けた都度、第1に所定の補正
関数f(x)で直接的に出力タイミングを補正する演算
をして可変遅延手段VDiの遅延量を補正する手段、あ
るいは第2に出力振幅に対応する補正データを補正テー
ブル27に格納しておき、出力振幅に対応する補正デー
タを読出して直接的に出力タイミングを補正する演算を
して可変遅延手段VDiの遅延量を補正する手段あるい
は第3に出力振幅に対応する遅延量設定データを遅延量
設定テーブル28に格納しておき、出力振幅に対応する
遅延量設定データを読出して直接的に可変遅延手段VD
iの遅延量を更新する手段を具備する構成としたことに
より、従来のようなテスタバスを介して多数チャンネル
の可変遅延手段VDiへ設定値を転送する時間が無くな
る結果、デバイス試験の一時停止期間が削減できる利点
が得られる。従ってデバイス試験のスループットが向上
する利点が得られる。
According to the present invention, the following effects can be obtained from the above description. According to the configuration of the invention described above, each time the voltage setting data (VIHi, VILi) for setting the output amplitude of the pin driver DRi is received, first, the output timing is directly corrected by the predetermined correction function f (x). Secondly, a means for performing an operation to correct the delay amount of the variable delay means VDi, or secondly, storing correction data corresponding to the output amplitude in the correction table 27 and reading out the correction data corresponding to the output amplitude directly. A means for correcting the delay amount of the variable delay means VDi by performing an operation for correcting the output timing, or thirdly, the delay amount setting data corresponding to the output amplitude is stored in the delay amount setting table 28 to correspond to the output amplitude. The delay amount setting data is read and the variable delay means VD is directly read.
With the configuration including the means for updating the delay amount of i, there is no time to transfer the set value to the variable delay means VDi of many channels via the tester bus as in the related art. As a result, the suspension period of the device test is reduced. There are benefits that can be reduced. Therefore, there is an advantage that the throughput of the device test is improved.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明の、半導体試験装置のピンドライバの
出力振幅設定に係る要部構成図である。
FIG. 1 is a configuration diagram of a main part of an output amplitude setting of a pin driver of a semiconductor test apparatus according to the present invention.

【図2】 本発明の、直接遅延量補正手段の構成例であ
る。
FIG. 2 is a configuration example of a direct delay amount correction unit of the present invention.

【図3】 本発明の、補正曲線の例である。FIG. 3 is an example of a correction curve according to the present invention.

【図4】 従来の、半導体試験装置のピンドライバの出
力振幅設定に係る要部構成図である。
FIG. 4 is a configuration diagram of a main part related to a conventional output amplitude setting of a pin driver of a semiconductor test apparatus.

【図5】 ピンドライバの出力振幅と出力タイミングと
の関係図である。
FIG. 5 is a relationship diagram between output amplitude and output timing of a pin driver.

【符号の説明】[Explanation of symbols]

20 直接遅延量補正手段 21 レジスタ 22 加算手段 24 振幅補正量演算部 26 補正関数式 27 補正テーブル 28 遅延量設定テーブル DRi ピンドライバ VDi 可変遅延手段 DESCRIPTION OF SYMBOLS 20 Direct delay amount correction means 21 Register 22 Addition means 24 Amplitude correction amount calculation part 26 Correction function formula 27 Correction table 28 Delay amount setting table DRi Pin driver VDi Variable delay means

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 被試験デバイス(DUT)を駆動するピ
ンドライバの出力振幅を変えてデバイス試験をする半導
体試験装置において、 ピンドライバの各振幅レベルにおけるタイミング差を予
め求め、このタイミング差をゼロに遅延量補正する補正
関数式の各項の係数を求める手段と、 ピンドライバの出力振幅を設定する電圧設定データを受
けた都度、該補正関数式により可変遅延手段の遅延量を
補正演算して該可変遅延手段の遅延設定値を更新する手
段と、 以上を各ピンドライバ毎に具備していることを特徴とし
た半導体試験装置。
In a semiconductor test apparatus for performing a device test by changing an output amplitude of a pin driver for driving a device under test (DUT), a timing difference at each amplitude level of the pin driver is obtained in advance, and this timing difference is reduced to zero. Means for determining the coefficient of each term of the correction function formula for correcting the delay amount, and each time voltage setting data for setting the output amplitude of the pin driver is received, the delay amount of the variable delay means is corrected and calculated by the correction function formula. A semiconductor test apparatus comprising: means for updating a delay set value of a variable delay means; and the above for each pin driver.
【請求項2】 被試験デバイスを駆動するピンドライバ
の出力振幅を変えてデバイス試験をする半導体試験装置
において、 ピンドライバの出力振幅をデバイス試験に使用される出
力振幅に順次変え、各振幅レベルにおけるタイミング差
を予め求め、このタイミング差をゼロに遅延量補正する
補正データを求める手段と、 該補正データを格納する補正テーブルと、 ピンドライバの出力振幅を設定する電圧設定データを受
けた都度、該補正テーブルから出力振幅に対応する補正
データを読出して可変遅延手段への設定値を補正演算し
て該可変遅延手段の遅延設定値を更新する手段と、 以上を各ピンドライバ毎に具備していることを特徴とし
た半導体試験装置。
2. A semiconductor test apparatus for performing a device test by changing an output amplitude of a pin driver for driving a device under test, wherein the output amplitude of the pin driver is sequentially changed to an output amplitude used for the device test. Means for obtaining a timing difference in advance and obtaining correction data for correcting the timing difference to a delay amount of zero; a correction table for storing the correction data; and a voltage setting data for setting the output amplitude of the pin driver. Means for reading out the correction data corresponding to the output amplitude from the correction table, correcting the set value to the variable delay means, and updating the delay set value of the variable delay means, for each pin driver A semiconductor test apparatus characterized by the following.
【請求項3】 被試験デバイスを駆動するピンドライバ
の出力振幅を変えてデバイス試験をする半導体試験装置
において、 ピンドライバの出力振幅をデバイス試験に使用される出
力振幅に順次変え、各振幅レベルにおけるタイミング差
を予め求め、このタイミング差をゼロに遅延量補正する
遅延量設定データを求める手段と、 該遅延量設定データを格納する遅延量設定テーブルと、 ピンドライバの出力振幅を設定する電圧設定データを受
けた都度、該遅延量設定テーブルから出力振幅に対応す
る遅延量設定データを読出して該可変遅延手段の遅延設
定値を更新する手段と、 以上を各ピンドライバ毎に具備していることを特徴とし
た半導体試験装置。
3. A semiconductor test apparatus for performing a device test by changing an output amplitude of a pin driver for driving a device under test, wherein the output amplitude of the pin driver is sequentially changed to an output amplitude used for the device test. Means for obtaining a timing difference in advance and obtaining delay amount setting data for correcting the timing difference to zero, a delay amount setting table for storing the delay amount setting data, and voltage setting data for setting the output amplitude of the pin driver Means for reading out the delay amount setting data corresponding to the output amplitude from the delay amount setting table and updating the delay setting value of the variable delay means every time the pin driver is provided. Characteristic semiconductor test equipment.
JP9195629A 1997-07-22 1997-07-22 Semiconductor test device Pending JPH1138087A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9195629A JPH1138087A (en) 1997-07-22 1997-07-22 Semiconductor test device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9195629A JPH1138087A (en) 1997-07-22 1997-07-22 Semiconductor test device

Publications (1)

Publication Number Publication Date
JPH1138087A true JPH1138087A (en) 1999-02-12

Family

ID=16344353

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9195629A Pending JPH1138087A (en) 1997-07-22 1997-07-22 Semiconductor test device

Country Status (1)

Country Link
JP (1) JPH1138087A (en)

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