Transmission circuit
AssigneesThe University of Electro-Communications, Fujitsu Limited
InventorsKazuo NAGATANI, Eisuke FUKUDA, Yasushi YAMAO
Life of this patent
Estimating the term…
Abstract
A transmission circuit comprises a Σ−Δ modulator to perform Σ−Δ modulation of an amplitude modulation component of a modulation signal and to output a pulse width modulation signal, an angle modulator to generate an angle modulation component signal of a signal obtained by multiplying the modulation signal by a transmission output control coefficient corresponding to a transmission output in a power amplifier, and a multiplier to multiply the pulse width modulation signal by the angle modulation component signal and to output a result of the multiplication as an output signal to the power amplifier.
Claims8
A transmission circuit comprising:
- a Σ−Δ modulator to perform Σ−Δ modulation of an amplitude modulation component of a modulation signal and to output a pulse width modulation signal;
- an angle modulator to generate an angle modulation component signal of a signal obtained by multiplying the modulation signal by a transmission output control coefficient corresponding to a transmission output in a power amplifier;
- and
- a multiplier to multiply the pulse width modulation signal by the angle modulation component signal and to output a result of the multiplication as an output signal to the power amplifier.
Dependencies are inferred from the claim text.