| 摘要 |
<p>PROBLEM TO BE SOLVED: To implement a high gain over a wide band while performing distortion compensation based on negative feedback.SOLUTION: A transmission device of the present invention, which is a transmitter for transmitting an amplified version of an input signal, has: an attenuator capable of adjusting signal attenuation for receiving part of the transmission signal and attenuating the input signal to output a first signal; an adjustable phase rotation shifter for rotating a phase of the input signal to output a second signal; a comparator for comparing the first signal and the second signal in terms of phase and strength; a first adder for adding the first signal and the second signal to output a third signal; a second adder for adding the third signal and the input signal to output a fourth signal; a power amplifier for amplifying the fourth signal to output the transmission signal; and a control section for controlling the phase rotation by the shifter and the signal attenuation by the attenuator such that a difference in phase and a difference in strength between the first signal and the second signal become minimum, respectively, in accordance with results of comparison by the comparator.</p> |
