Transmission circuit
AssigneePanasonic Corporation
InventorsToru Matsuura, Hisashi Adachi
Life of this patent
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Abstract
A transmission circuit capable of transmitting a modulated wave signal using polar modulation in a broad band and with low power consumption is provided. The transmission circuit generates an amplitude signal and a phase signal based on data to be transmitted, and separates the amplitude signal into a low-frequency amplitude signal and a high-frequency amplitude signal. The transmission circuit amplitude-modulates the phase signal in a broad band using the high-frequency amplitude signal in a high-frequency voltage control section 104 and an amplitude modulation section 105 and amplitude-modulates the phase signal into low power consumption using the low-frequency amplitude signal in a low-frequency voltage control section 106 and amplitude modulation section 107.
Claims20
A transmission circuit for generating a modulated wave signal as a transmission signal, comprising:
- a data generation section for generating an amplitude signal containing an amplitude data component and a signal containing a phase data component based on data to be transmitted;
- a frequency discrimination section for separating the amplitude signal into a low-frequency amplitude signal and a high-frequency amplitude signal based on a predetermined frequency threshold;
- a current control section for outputting a current, an output level of the current having been controlled corresponding to at least one of the low-frequency amplitude signal and the high-frequency amplitude signal;
- and
- a modulation section for modulating the signal containing the phase data component and the current output from the current control section to generate the modulated wave signal.
Dependencies are inferred from the claim text.