公开(公告)号：US06473016B2

公开(公告)日：2002-10-29

申请号：US09851429

申请日：2001-05-09

Applicant: Olli Piirainen ,  Markku Tirkkonen

Inventor： Olli Piirainen ,  Markku Tirkkonen

IPC: H03M162

CPC classification number: H03G3/3078 ,  H03G1/0088 ,  H03M1/185

Abstract: The invention relates to a method and an apparatus for implementing automatic gain control in a system where an analog signal is converted into a digital signal. The apparatus comprises means (208) for performing automatic gain control of the adjustable signal in an analog manner using a gain control step of predetermined size and means (446, 448) for performing inverse gain control of the digitized signal in such a way that, after the digital adjustment, the power of the signal is the same as before the analog adjustment. To enable an accurate gain control, the apparatus further comprises means (410, 412, 214, 420) for determining the maximum energy of the signal during a predetermined measurement period, means (426, 428) for comparing the determined maximum energy to preset threshold values (430, 432), and means (436) for performing an automatic gain control of the analog signal and a compensation for the gain control to the digital signal, if the measured value exceeds the threshold.

Abstract translation: 本发明涉及一种在将模拟信号转换为数字信号的系统中实现自动增益控制的方法和装置。 该装置包括用于使用预定尺寸的增益控制步骤以模拟方式执行可调节信号的自动增益控制的装置（208）和用于以这样的方式执行数字化信号的逆增益控制的装置（446,448） 数字调节后，信号的功率与模拟调整前相同。 为了实现精确的增益控制，装置还包括用于在预定测量周期内确定信号的最大能量的装置（410,412,214,420），用于将确定的最大能量与预设阈值进行比较的装置（426,428） 值（430,432）和用于执行模拟信号的自动增益控制的装置（436）以及对数字信号的增益控制的补偿，如果测量值超过阈值。