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发明授权
US06184752B2 Amplifier device with digitally controllable gain and optical disc read apparatus incorporating such a device 有权
具有数字可控增益的放大器装置和包含这种装置的光盘读取装置

  • 专利标题： Amplifier device with digitally controllable gain and optical disc read apparatus incorporating such a device
  • 专利标题（中）： 具有数字可控增益的放大器装置和包含这种装置的光盘读取装置
  • 申请号： US09413393
    申请日： 1999-10-06
  • 公开(公告)号： US06184752B2
    公开(公告)日： 2001-02-06
  • 发明人: Pierre Dautriche
  • 申请人： Pierre Dautriche
  • 优先权： FR9812495 19981006
  • 主分类号： H03G310
  • IPC分类号： H03G310
Amplifier device with digitally controllable gain and optical disc read apparatus incorporating such a device
摘要：
The device has reference current sources (T71, T72, T7M) which are arranged in such a way that the sum of the currents flowing through each of the said sources is equal to the input current (IIN, I′IN) and output current sources (T81, T82, T8N), in each of which the current flowing through the reference sources is duplicated and which are arranged in such a way that the sum of the currents flowing through the output sources is equal to the output current (IOUT, I′OUT). The number of reference sources (T71, T72, T7M) and output sources (T81, T82, T8N) which are connected is controlled by the digital signal (200) and determines the gain of the device. Application to the circuit for processing the signals output by a read head of an optical disc reader apparatus.
摘要（中）：

该装置具有参考电流源（T71，T72，T7M），其以流过每个所述源极的电流之和等于输入电流（IIN，I'IN）和输出电流源 （T81，T82，T8N），其中流过参考源的电流是复制的，并且以使得流过输出源的电流之和等于输出电流（IOUT，I 'OUT）。 所连接的参考源（T71，T72，T7M）和输出源（T81，T82，T8N）的数量由数字信号（200）控制，并确定器件的增益。 应用于电路，用于处理由光盘读取器装置的读取头输出的信号。

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