发明名称 |
High-frequency clock generator using lower frequency voltage controlled ring oscillator |
摘要 |
A low noise high-frequency clock generator using a low speed voltage controlled oscillator which includes 2m differential delay elements connected in series in an inverting configuration, where m is an integer greater than 0. The output of the 2mth delay element is coupled to the input of the first delay element in a non-inverting configuration. M 2-input exclusive NOR gates are provided wherein respective input pairs are taken from positive terminal inputs of adjacent delay elements. The clock generator also includes an m-input OR gate coupled to the m-outputs from the respective m exclusive NOR gates for generating the clock generator output signal. The delay elements have a variable delay associated therewith controlled by a control delay signal DCS. Changes in the delay associated with each delay element changes the frequency of the clock generator output signal wherein the output frequency is equal to 1/(2d), where d is the time delay associated with each delay element.
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申请公布号 |
US5548251(A) |
申请公布日期 |
1996.08.20 |
申请号 |
US19950493549 |
申请日期 |
1995.06.23 |
申请人 |
ELECTRONICS RESEARCH & SERVICE ORGANIZATION |
发明人 |
CHOU, SHU-KUANG;LIOU, JIUNN-FU |
分类号 |
H03K3/0231;H03K3/03;(IPC1-7):H03B5/02;H03B27/00 |
主分类号 |
H03K3/0231 |
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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