数字AGC电路

申请公布号：CN100508377C

申请号：CN200310113167.0

申请日期：2003.12.25

申请公布日期：2009.07.01

申请人：

松下电器产业株式会社

发明人：永野孝一

分类号：H03G3/20(2006.01)I;H03G3/30(2006.01)I;H04L27/22(2006.01)I

主分类号：H03G3/20(2006.01)I

代理机构：

中科专利商标代理有限责任公司

代理人：汪惠民

地址：日本大阪府

摘要：一种数字AGC电路，用峰值检测电路(10)检测数字化的输入摆动信号的二分之一周期以上的期间内的峰值，根据该峰值，用增益计算电路(20)计算增益调整系数，用限幅器(30)将其限制在一定的范围内并供给乘法器(50)。另一方面，为了调整计算增益调整系数而产生的数字性的延迟，用延迟器(40)使输入摆动信号延迟后供给乘法器(50)。乘法器(50)将增益调整系数乘以延迟器(40)供给的摆动信号，将其结果，作为数字AGC电路(4)的输出。该电路能对DVD盘被2相相位调制的摆动信号的振幅进行增益调整，从而进行高精度的地址信息的解调。

主权项：1. 一种数字AGC电路，用于地址信息解调电路，该地址信息解调电路用于解调地址信息，该地址信息由摆动信号的相位调制而记录在DVD盘中，其特征在于：所述数字AGC电路包括：将数字化的摆动信号作为输入，而且检测该摆动信号的二分之一周期以上的期间内的峰值的峰值检测电路；根据所述检测到的峰值，计算增益调整系数的增益计算电路；以及将所述增益调整系数乘以所述数字化的摆动信号的乘法器。

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