发明名称 |
Digitally-tuned oscillator including a self-calibrating RC oscillator circuit |
摘要 |
A digitally-tuned oscillator (DTO) includes a digital-to-analog converter (DAC) and an RC oscillator. The RC oscillator includes an RC circuit for forming a time constant equal to the RC product. However, this RC time constant is not used in the manner of a typical RC network to set the frequency of oscillation. Instead, the RC oscillator disclosed herein includes a separate oscillator, such as a voltage-controlled oscillator (VCO), and uses the RC time constant to compare with the oscillator-generated period and to adjust the frequency of the overall RC oscillator circuit in accordance with the comparison. The RC oscillator is self-calibrating.
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申请公布号 |
US5552748(A) |
申请公布日期 |
1996.09.03 |
申请号 |
US19950479299 |
申请日期 |
1995.06.07 |
申请人 |
AMERICAN MICROSYSTEMS, INC. |
发明人 |
O'SHAUGHNESSY, TIMOTHY G. |
分类号 |
H03B1/00;H03B5/20;H03D13/00;H03K3/03;H03L7/00;(IPC1-7):H03B5/24 |
主分类号 |
H03B1/00 |
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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