| 摘要 |
PURPOSE:To keep an output power from a 1st burst output to a prescribed output level in the sample-and-hold type automatic gain control circuit keeping a burst output to a prescribed output level. CONSTITUTION:The control circuit is provided with 1st and 2nd changeover devices 12, 13 used to make an output signal of a modulator 3 to be a nonmodulation signal and with a high speed 2nd sample-and-hold circuit 15 operated for a period when the nonmodulation signal is outputted, and a period for some bits for nonmodulation is provided before a burst output, and the high speed 2nd sample-and-hold circuit 15 is operated for this period to keep the output power constant to make the output power constant from the 1st burst output. |
