发明名称 |
Time constant automatic adjusting circuit, filter circuit system, and method of automatically adjusting time constant |
摘要 |
A time constant automatic adjusting circuit comprises: a filter circuit varying a phase of an clock signal to be input so as to output the clock signal; a phase comparison circuit comparing a phase of an output signal of the filter circuit with the phase of the clock signal, and outputting a predetermined voltage when the phase of the output signal and the phase of the clock signal are the same; at least three comparators comparing the output voltage with a plurality of different voltages; an up-down counter counting a number of output bits of either one of the at least three different voltages in accordance with an output result of the comparators; and a control circuit varying the time constant of the filter circuit in accordance with the number of output bits counted by the up-down counter.
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申请公布号 |
US2006245132(A1) |
申请公布日期 |
2006.11.02 |
申请号 |
US20060411939 |
申请日期 |
2006.04.27 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
WATANABE OSAMU;ITO RUI;SAIGUSA SHIGEHITO;ITAKURA TETSURO |
分类号 |
H02H3/20 |
主分类号 |
H02H3/20 |
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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