发明名称 |
High pass filter with coefficient switching to improve settling time |
摘要 |
A high pass filter is provided utilizing a digital filter with coefficients that can be switched to provide for two responses, a fast response and a slow response. A first response is provided by an accumulator block (38) disposed between the output and a summing junction (30) on the input of the digital filter. A multiplexer (40) selects between this accumulator block (38) and a slow response accumulator block (42). The switching is effected with a zero crossing detect circuit (26). When the first and faster response brings the DC level down to a value that is close to zero, the second and slower response is selected to basically lock it to zero.
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申请公布号 |
US5777909(A) |
申请公布日期 |
1998.07.07 |
申请号 |
US19950580581 |
申请日期 |
1995.12.29 |
申请人 |
CRYSTAL SEMICONDUCTOR CORPORATION |
发明人 |
LEUNG, KA;ZHU, SARAH SHUANGXIA |
分类号 |
H03H17/02;H03H17/04;(IPC1-7):G06F17/10 |
主分类号 |
H03H17/02 |
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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