发明名称 |
OSCILLATING CIRCUIT WITH TUNABLE FILTER FOR MINIMIZING PHASE NOISE |
摘要 |
<p>The present invention relates to an oscillating circuit arrangement having a resonating arrangement with a first resonance frequency (coo) comprising a voltage controlled oscillator arrangement. It further comprises a tunable filter arrangement connected to the source node of said voltage controlled oscillator (VCO) arrangement. Said filter arrangement particularly comprises an equivalent current source resonating at a second resonance frequency c&thetas;f, the second resonance frequency being a multiple n, n=1 or 2 of said first resonance frequency (α>o), n being equal to the minimum number of switch transistors required for oscillation of said VCO arrangement. The filter arrangement particularly comprises an inductor connected in parallel with a capacitor, said capacitor being adapted to be tunable such that the phase noise of the resonating arrangement can be minimized through tuning of the filter arrangement.</p> |
申请公布号 |
EP1943659(A1) |
申请公布日期 |
2008.07.16 |
申请号 |
EP20050789951 |
申请日期 |
2005.10.05 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) |
发明人 |
JACOBSSON, HARALD;ASPEMYR, LARS |
分类号 |
H01J5/22;H03B5/12;H03J3/32;H03J7/08 |
主分类号 |
H01J5/22 |
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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