发明名称 |
Oscillators with active higher-in-order phase shift filtering |
摘要 |
The present invention proposes a new way of improving the phase stability and frequency selectivity of a phase shift oscillator ( 100 ). By introducing a filter-order enhancing feedback loop ( 124 ) in association with a phase shift filter ( 122 ) in the oscillator, higher-order phase shift filtering can be achieved without using inductive elements as in conventional higher-order LC phase shift filters. This is a great advantage, since a high Q-value can be obtained without limited by the relatively high internal losses of inductive elements (L). |
申请公布号 |
US7053723(B2) |
申请公布日期 |
2006.05.30 |
申请号 |
US20030467489 |
申请日期 |
2003.11.20 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) |
发明人 |
FREDRIKSSON JESPER |
分类号 |
H03B5/32;H03B5/12;H03B5/24;H03K3/282 |
主分类号 |
H03B5/32 |
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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