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    • 31. 发明授权
    • Method and system for formal verification of an electronic circuit design
    • 电子电路设计形式验证的方法和系统
    • US07890903B2
    • 2011-02-15
    • US12129127
    • 2008-05-29
    • Kai WeberMatthias PflanzChristian JacobiUdo Krautz
    • Kai WeberMatthias PflanzChristian JacobiUdo Krautz
    • G06F17/50
    • G06F17/5031
    • A new and convenient methodology for proving the correctness of multiplier and multiply-accumulate circuit designs in a full custom design flow. Such an approach utilizes a basic description of the implemented algorithm, which is created in early phases of the design flow and requires only little extra work for the designer who spends most of the time in full-custom optimizations. Such an approach also defines arithmetic circuit at the arithmetic bit level and allows for the generation of a gate level netlist. Given a structural similarity between the specification and design under verification, a large amount of structural similarity between the generated netlists is obtained so that a standard equivalence checker can be utilized to verify the design against the specification.
    • 一种新的便捷的方法,用于在完整的定制设计流程中证明乘法器的正确性和乘法积累电路设计。 这种方法利用了实现的算法的基本描述,该算法是在设计流程的早期阶段创建的,并且只需要花费大部分时间进行全自定义优化的设计人员的额外工作。 这种方法还在算术位电平处定义运算电路,并允许生成门级网表。 给定了在规范和验证设计之间的结构相似性,获得了生成的网表之间大量的结构相似性,从而可以利用标准的等价检验器来验证与规范相关的设计。
    • 32. 发明申请
    • METHOD AND SYSTEM FOR FORMAL VERIFICATION OF AN ELECTRONIC CIRCUIT DESIGN
    • 用于电子电路设计的正式验证的方法和系统
    • US20090300560A1
    • 2009-12-03
    • US12129127
    • 2008-05-29
    • Kai WeberMatthias PflanzChristian JacobiUdo Krautz
    • Kai WeberMatthias PflanzChristian JacobiUdo Krautz
    • G06F17/50
    • G06F17/5031
    • A new and convenient methodology for proving the correctness of multiplier and multiply-accumulate circuit designs in a full custom design flow. Such an approach utilizes a basic description of the implemented algorithm, which is created in early phases of the design flow and requires only little extra work for the designer who spends most of the time in full-custom optimizations. Such an approach also defines arithmetic circuit at the arithmetic bit level and allows for the generation of a gate level netlist. Given a structural similarity between the specification and design under verification, a large amount of structural similarity between the generated netlists is obtained so that a standard equivalence checker can be utilized to verify the design against the specification.
    • 一种新的便捷的方法,用于在完整的定制设计流程中证明乘法器的正确性和乘法积累电路设计。 这种方法利用了实现的算法的基本描述,该算法是在设计流程的早期阶段创建的,并且只需要花费大部分时间进行全自定义优化的设计人员的额外工作。 这种方法还在算术位电平处定义运算电路,并允许生成门级网表。 给定了在规范和验证设计之间的结构相似性,获得了生成的网表之间大量的结构相似性,从而可以利用标准的等价检验器来验证与规范相关的设计。
    • 33. 发明申请
    • Leading-Zero Counter and Method to Count Leading Zeros
    • 领先的零计数器和计算领先零的方法
    • US20070050435A1
    • 2007-03-01
    • US11459663
    • 2006-07-25
    • Christian JacobiSilvia MuellerJochen PreissKai Weber
    • Christian JacobiSilvia MuellerJochen PreissKai Weber
    • G06F15/00
    • G06F7/74
    • The present invention relates to a circuit comprising a Leading Zero Counter (LZC) sub-circuit driving a second sub-circuit, like a shifter or arbiter. Shifter circuits or arbiter circuits operating with fewer stages than before have a smaller delay since every stage can select between more than two inputs. This reduces the overall delay of the shifter, arbiter, etc. But for state-of-the art binary LZC circuits this requires a complex recoding between LZC and shifter circuit. In order to provide an improved leading zero circuit having an output which allows a simpler control of a post-connected sub-circuit having two or more stages and having at least one stage with three or more inputs, it is proposed to provide a LZC circuitry providing an output consisting of two or more unary encoded substrings. This removes the requirement for a recoder between LZC and shifter.
    • 本发明涉及一种包括驱动第二子电路的前导零计数器(LZC)子电路的电路,如移相器或仲裁器。 移动器电路或仲裁器电路的运行次数比以前更少,延迟较小,因为每个阶段都可以在两个以上的输入之间进行选择。 这减少了移位器,仲裁器等的总体延迟。但是对于最先进的二进制LZC电路,这需要LZC和移位器电路之间的复杂重新编码。 为了提供具有输出的改进的前导零电路,其允许更简单地控制具有两个或更多个级的后连接子电路并且具有至少一个具有三个或更多个输入的级,所以建议提供一种LZC电路 提供由两个或更多个一元编码的子串组成的输出。 这消除了对LZC和移位器之间的重新编码器的要求。