发明名称 |
DIGITAL FILTER DEVICE, PHASE DETECTION DEVICE, POSITION DETECTION DEVICE, AD CONVERSION DEVICE, ZERO CROSS DETECTION DEVICE, AND DIGITAL FILTER PROGRAM |
摘要 |
A digital filter device capable of removing the effect of noise such as chattering from a zero crossing signal is provided. A digital filter device 4 filtering a binary digital signal DIN and outputting a binary digital signal DOUT is provided with a toggle flip-flop 12 which switches a signal level of the digital signal DOUT each time a trigger signal is input; an XOR circuit 13 which outputs a first enable signal EN1 while a signal level of the digital signal DIN does not match with the signal level of the output digital signal DOUT; and a charge counter 14 which counts in synchronization with a clock signal CLK while the first enable signal EN1 is input and resets the count to an initial value and outputs a carry on signal ON_RCO as the trigger signal to the toggle flip-flop 12 when the count has reached an upper limit value.
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申请公布号 |
US2009313313(A1) |
申请公布日期 |
2009.12.17 |
申请号 |
US20070306587 |
申请日期 |
2007.06.14 |
申请人 |
TOSHIBA KIKAI KABUSHIKI KAISHA |
发明人 |
YOKOKAWA NARUTOSHI;SATO SHOUICHI |
分类号 |
G06F17/10;G01R13/02;H03K3/02;H03K5/00;H03M1/12 |
主分类号 |
G06F17/10 |
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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