会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 5. 发明授权
    • Logic simulation with efficient deadlock avoidance by selectively
suspending event data fetch based on element information
    • 通过选择性地暂停基于元素信息的事件数据获取,可以有效地避免死锁的逻辑模拟
    • US5426768A
    • 1995-06-20
    • US975841
    • 1992-11-13
    • Kiyoshi Kanazawa
    • Kiyoshi Kanazawa
    • G06F11/25G06F17/50G06F19/00
    • G06F17/5022
    • Disclosed is a method for simulating an operation of an event driven logic circuit in response to changes of the signal status of each terminal of all the elements in the logical circuit, based on event data each containing event time indicating when the signal status has changed, status change indicating how the status has changed, an element identifier identifying the element, and a terminal identifier identifying the terminal, the method comprising a simulation time output step for outputting data indicating simulation time which is continuously counted up; a first selection step for selecting the event data whose event time is equal to the simulation time; a second selection step for selecting the event data whose event time is earliest among event data present for all the input terminals of the element corresponding to the event data; a simulation step for generating new event data depending on a change of the signal status of the output terminal of the element corresponding to the event data, based on the event data selected by each selection step; and a control step for suspending the operation in the second selection step based on the event data selected by the second selection step, the suspension being exercised separately for each element.
    • 公开了一种用于根据事件数据模拟事件驱动逻辑电路的操作的方法,该方法基于事件数据,每个事件数据包含指示信号状态何时改变的事件时间,该逻辑电路中的所有元素的每个终端的信号状态的变化, 状态变化指示状态如何变化,标识元素的元素标识符和识别终端的终端标识符,该方法包括:模拟时间输出步骤,用于输出指示连续递增的模拟时间的数据; 用于选择事件时间等于模拟时间的事件数据的第一选择步骤; 第二选择步骤,用于在对应于事件数据的元素的所有输入终端存在的事件数据中选择事件时间最早的事件数据; 基于由每个选择步骤选择的事件数据,根据与事件数据对应的元素的输出端子的信号状态的变化来生成新的事件数据的模拟步骤; 以及控制步骤,用于基于由第二选择步骤选择的事件数据来暂停在第二选择步骤中的操作,对于每个元件分别执行暂停。
    • 9. 发明授权
    • Logic simulation method and apparatus
    • 逻辑仿真方法及装置
    • US5018089A
    • 1991-05-21
    • US319319
    • 1989-03-06
    • Kiyoshi Kanazawa
    • Kiyoshi Kanazawa
    • G06F11/25G06F17/50G06F19/00
    • G06F17/5022
    • Determining the operation of a logic circuit through calculation is generally called logic simulation. Especially, in event driven type logic simulation, signal status changes at input and output terminals of an element of the logic circuit are deemed as events and only for an element in which an event occurs at its input terminal, the signal status at its output terminal is calculated. In the event driven type logic simulation, a series of signal status changes externally applied to the logic circuit is stored, as injection events, in a memory of a logic simulation apparatus. If injection events are all stored in the memory before execution of the simulation or injection events are stored in the memory by temporarily stopping the simulation after start thereof, most of memory capacity is consumed by the injection events or simulation speed is degraded. To solve this problem, an identifier (called color) is added to an event and when an injection event is injected, the injected event is associated with auxiliary time representing a minimum of values of event times of injection events expected to be injected after injection of that injected event. Color and auxiliary time are used to permit execution of the simulation in parallel with injection of injection events.