发明名称 |
Generating pulses in analog channel of ATE tester |
摘要 |
A method simulating the filtering of a current pulse in a series of pulses. The method includes receiving a series of n+1 consecutive pulse addresses, including a pulse address for the current pulse as the last in the series of n+1, each pulse address being in a range of m values; storing the n pulses addresses prior to the current pulse address; building a composite address from the current pulse address and the prior n pulse addresses and applying the composite address to read a pulse shape from a memory of at least mn+1 pulse shapes. Also, apparatus issuing high speed pulses of programmable length. The apparatus includes a field of programmable memory to store a pulse length; a pulse clock line carrying a pulse clock signal having a pulse frequency; a frequency multiplier connected to receive the pulse clock signal and the pulse length stored in the programmable memory field and producing a sample clock signal having a frequency equal to the pulse length times the pulse clock frequency; a pulse memory holding the samples for a pulse; a DAC coupled to the pulse memory and generating analog pulses from samples received from the pulse memory; and a signal path carrying the sample clock signal to set the sampling frequency of a DAC and to clock samples from the pulse memory to the DAC.
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申请公布号 |
US5918198(A) |
申请公布日期 |
1999.06.29 |
申请号 |
US19960734994 |
申请日期 |
1996.10.22 |
申请人 |
SCHLUMBERGER TECHNOLOGIES INC. |
发明人 |
RICCA, PAOLO DALLA;ROSENTHAL, DANIEL |
分类号 |
G01R31/28;G01R31/3167;G01R31/319;G06F11/22;(IPC1-7):G01R31/28 |
主分类号 |
G01R31/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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