发明授权
- 专利标题: Method and apparatus for remotely buffering test channels
- 专利标题(中): 用于远程缓存测试通道的方法和设备
-
申请号: US12273408申请日: 2008-11-18
-
公开(公告)号: US07825652B2公开(公告)日: 2010-11-02
- 发明人: Charles A. Miller
- 申请人: Charles A. Miller
- 申请人地址: US CA Livermore
- 专利权人: FormFactor, Inc.
- 当前专利权人: FormFactor, Inc.
- 当前专利权人地址: US CA Livermore
- 代理机构: Kirton & McConkie
- 主分类号: G01R31/28
- IPC分类号: G01R31/28
摘要:
A system is provided to enable leakage current measurement or parametric tests to be performed with an isolation buffer provided in a channel line. Multiple such isolation buffers are used to connect a single signal channel to multiple lines. Leakage current measurement is provided by providing a buffer bypass element, such as a resistor or transmission gate, between the input and output of each buffer. The buffer bypass element can be used to calibrate buffer delay out of the test system by using TDR measurements to determine the buffer delay based on reflected pulses through the buffer bypass element. Buffer delay can likewise be calibrated out by comparing measurements of a buffered and non-buffered channel line, or by measuring a device having a known delay.