发明授权
- 专利标题: Crosstalk reduction circuit for crosspoint matrix
- 专利标题(中): 交叉点矩阵的串扰减少电路
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申请号: US883508申请日: 1992-05-15
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公开(公告)号: US5287066A公开(公告)日: 1994-02-15
- 发明人: John E. Liron , Grant T. McFetridge , Kevin J. Shuholm
- 申请人: John E. Liron , Grant T. McFetridge , Kevin J. Shuholm
- 申请人地址: CA Nevada City
- 专利权人: The Grass Valley Group
- 当前专利权人: The Grass Valley Group
- 当前专利权人地址: CA Nevada City
- 主分类号: H03K17/00
- IPC分类号: H03K17/00 ; H04B15/04 ; H04Q3/52 ; H03B1/00
摘要:
A crosstalk reduction circuit compensates for input to output capacitance coupling of each switch of a crosspoint matrix and for output to common level capacitance coupling for each integrated circuit chip that makes up the crosspoint matrix. Each input signal to the crosspoint matrix is capacitively scaled, summed and inverted to produce an "off" isolation compensation signal, and each output signal from the crosspoint matrix is capacitively scaled, summed and inverted to produce an output isolation compensation signal. Each compensation signal is resistively scaled for each output signal, and the scaled compensation signals are subtracted from the output signals to reduce the crosstalk in the output signals.
公开/授权文献
- US4713741A Excitation control apparatus for rotary electric machine 公开/授权日:1987-12-15