发明名称 |
PLL MODULATION CIRCUIT, RADIO TRANSMISSION DEVICE, AND RADIO COMMUNICATION DEVICE |
摘要 |
<p>Provided are a PLL modulation circuit, a radio transmission device, and a radio communication device capable of maintaining a modulation accuracy for modulation of a wide band. The PLL modulation circuit (100) includes: a PLL unit (110), first modulation signal input means for inputting a first modulation signal to a divider (112) or a phase comparator (113) of the PLL unit (110); second modulation signal input means for DA converting the digital modulation signal in a DA converter (116) to generate an analog second modulation signal and inputting it to a voltage control oscillator (111) of the PLL unit (110); a second divider for dividing the output signal of the voltage control oscillator (111); and control means for generating a center frequency control signal, a gain control signal, and a second division ration control signal according to the channel selection signal and the control voltage inputted to the voltage control oscillator (111) and supplying them to the divider (112), the DA converter (116), and the second divider (114), respectively.</p> |
申请公布号 |
WO2007083635(A1) |
申请公布日期 |
2007.07.26 |
申请号 |
WO2007JP50527 |
申请日期 |
2007.01.16 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;MITANI, YOUSUKE;HIRANO, SHUNSUKE;ISHIDA, KAORU |
发明人 |
MITANI, YOUSUKE;HIRANO, SHUNSUKE;ISHIDA, KAORU |
分类号 |
H03C3/00;H03L7/183 |
主分类号 |
H03C3/00 |
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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