发明名称 |
Multiple stage tracking filter using a self-calibrating RC oscillator circuit |
摘要 |
A multiple stage tracking filter includes a self-calibrating RC oscillator, a resistor connected to the self-calibrating RC oscillator and a capacitor connected to the self-calibrating RC oscillator. The filter further includes a switched capacitor filter element connected to the self-calibrating RC oscillator. The switched capacitor filter elements include a switch which is controlled by a timing signal from the self-calibrating RC oscillator. A method of filtering a signal includes the steps of operating a self-calibrating RC oscillator to generate a timing signal, tuning a plurality of cascaded filter elements with the generated timing signal and passing a signal through the plurality of tuned cascaded filter elements.
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申请公布号 |
US5663675(A) |
申请公布日期 |
1997.09.02 |
申请号 |
US19950479298 |
申请日期 |
1995.06.07 |
申请人 |
AMERICAN MICROSYSTEMS, INC. |
发明人 |
O'SHAUGHNESSY, TIMOTHY G. |
分类号 |
H03H11/04;H03H19/00;H03K3/03;(IPC1-7):H03K5/00;H04B1/00 |
主分类号 |
H03H11/04 |
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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