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    • 2. 发明申请
    • RAM-DAC FOR TRANSMIT PREEMPHASIS
    • 用于传输预留的RAM-DAC
    • WO2007016274A2
    • 2007-02-08
    • PCT/US2006029241
    • 2006-07-25
    • RAMBUS INCHO ANDREWCHEN FRED FZERBE JARED L
    • HO ANDREWCHEN FRED FZERBE JARED L
    • H04L25/03
    • H04L25/03834H03H17/0294
    • Described are transmitters with RAM-DAC based pre-emphasis filters that can be updated adaptively without interfering with data transmission. The memory within the RAM- DAC is divided into active and inactive memory locations, in which active memory locations are those to be accessed in the near future, and consequently cannot be updated (written to) at a given time due without inducing a read/write conflict. One embodiment monitors incoming memory addresses to find an adequate time window for a write to take place without a read interference. Another embodiment includes two memory blocks with similar address space, one of which may be updated as the other is used to for data transmission. Some embodiments employ a RAM-DAC with reduced memory size and complexity.
    • 描述的是具有基于RAM-DAC的预加重滤波器的发射器,其可以自适应地更新而不干扰数据传输。 RAM-DAC内的存储器被分为有源和非活动存储器位置,其中有效存储器位置是在不久的将来被访问的存储器位置,因此不能在给定时间更新(写入),而不引起读/ 写冲突。 一个实施例监视进入的存储器地址以找到足够的时间窗口,以便在没有读取干扰的情况下进行写入。 另一个实施例包括具有相似地址空间的两个存储器块,其中之一可以被更新,而另一个用于数据传输。 一些实施例采用具有减小的存储器大小和复杂度的RAM-DAC。