| 摘要 |
PROBLEM TO BE SOLVED: To provide a receiving device and an automatic gain control method of spread spectrum communication in which gain control an be attained at a high speed in a wide dynamic range, without interrupting the miniaturization of a device main body. SOLUTION: In a digital attenuator 1211 of a gain adjusting part 1210, attenuating amount adjustment is operated, so that a value A of a detected reception signal level can satisfy the relation of a minimum value A1 of the reception signal level, which can be amplified to a desired level by a variable amplifier 1212 and a maximum value A2 of the reception signal level in the linearly operable region of the variable amplifier 1212, that is, A1>A>A2. In the variable amplifier 1212, gain adjustment is operated so that the value A of the detected reception signal level satisfy the relation of an allowable minimum value A3 of the reception signal level and an allowable maximum value A4 of the reception signal level, that is, A4>A>A3. |
