Telecommunications – Transmitter – Angle modulation
Reexamination Certificate
2011-07-12
2011-07-12
Urban, Edward (Department: 2618)
Telecommunications
Transmitter
Angle modulation
C455S113000, C455S102000, C455S127200, C375S306000, C332S127000, C332S128000
Reexamination Certificate
active
07979038
ABSTRACT:
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.
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Hirano Shunsuke
Ishida Kaoru
Mitani Yosuke
Dickinson Wright PLLC
Hu RuiMeng
Panasonic Corporation
Urban Edward
LandOfFree
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