发明名称 |
Frequenzsynthetisierer und mobiles Funkgerät mit einem solchen Frequenzsynthetisierer |
摘要 |
In a frequency synthesizer device in which a frequency-division ratio control circuit 6 and other circuits are integrated on the same semiconductor substrate, a power supply 8 for supplying a power to the frequency- division ratio control circuit 6 is provided separately from a power supply 7 for supplying a power to other circuits. A power supply voltage supplied from the power supply 8 to the frequency-division ratio control circuit 6 is set lower than a power supply voltage supplied to other circuits. The noise generated by the frequency-division ratio control circuit 6 can be reduced by setting the power supply voltage lower, and also C/N degradation can be reduced. Since the noises can be suppressed even if the frequency is increased, a lock-up time can be reduced and the lower power consumption can be attained. <IMAGE> |
申请公布号 |
DE60020789(D1) |
申请公布日期 |
2005.07.21 |
申请号 |
DE2000620789 |
申请日期 |
2000.10.26 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
YAMADA, RYOICHI |
分类号 |
H03L7/183;H03L7/08;H03L7/197;H04B1/16 |
主分类号 |
H03L7/183 |
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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