发明名称 |
PLL frequency synthesizer, in particular for frequency hopping systems with direct frequency modulation. |
摘要 |
PLL frequency synthesizer suitable to carry out fast frequency hopping and to modulate directly the generated frequency. It includes broadband filtering means (LB) for the quick transition during the hop from one frequency to another, and narrow band filtering means (BS) for the operation conditions. The narrowband filtering means (BS) include: <UL ST="-"> a sample and hold circuit (SH); a narrow band filter (RS); a buffer connected between said sample and hold circuit (SH) and said narrow band filter (RS). </UL> <IMAGE> |
申请公布号 |
EP0610995(A3) |
申请公布日期 |
1995.07.05 |
申请号 |
EP19940200253 |
申请日期 |
1994.01.31 |
申请人 |
ITALTEL SPA |
发明人 |
MONDANI GIOVANNI;ESPOSITO CLAUDIO |
分类号 |
H03C3/09;H03L7/107;H03L7/183 |
主分类号 |
H03C3/09 |
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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