Telecommunications – Transmitter – Amplitude modulation
Reexamination Certificate
2006-12-05
2009-02-24
Trinh, Sonny (Department: 2618)
Telecommunications
Transmitter
Amplitude modulation
C455S110000, C455S127100
Reexamination Certificate
active
07496333
ABSTRACT:
A small-size transmission circuit is provided which outputs a transmission signal having high linearity independently of a magnitude of an output power, and operates with high efficiency. A signal generating section generates quadrature data based on input data. A computation section compares an amplitude component of the quadrature data with a predetermined amplitude threshold value, and outputs an amplitude signal, a first phase signal, and a second phase signal. A regulator outputs a voltage controlled depending on the amplitude signal. An angle modulation section and an angle modulation section angle-modulate the phase signal to output first and second angle-modulated signals. An amplitude modulation section and an amplitude modulation section amplitude-modulate the first and second angle-modulated signals using a voltage controlled depending on the amplitude signal to output the angle-modulated and amplitude-modulated signals as a first modulated signal and a second modulated signal. A combining section combines the first and second modulated signals to output a transmission signal.
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Ishida Kaoru
Matsuura Toru
Panasonic Corporation
Trinh Sonny
Wenderoth , Lind & Ponack, L.L.P.
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