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1. 发明授权

US4947063A Method and apparatus for reducing transient noise in integrated circuits 失效
标题翻译：降低集成电路瞬态噪声的方法和装置
公开(公告)号：US4947063A
公开(公告)日：1990-08-07
申请号：US161469
申请日：1988-02-26
申请人： Timothy G. O'Shaughnessy , David K. Chung , Richard W. Hull , Kenneth W. Ouyang , Victor G. Pierotti , Joseph A. Souza
发明人： Timothy G. O'Shaughnessy , David K. Chung , Richard W. Hull , Kenneth W. Ouyang , Victor G. Pierotti , Joseph A. Souza
IPC分类号： H03K17/16 , H03K19/003
CPC分类号： H03K17/166 , H03K17/163 , H03K19/00361
摘要： The transient noise generated at the output drivers of an integrated circuit chip is reduced by maintaining an increasing ramp shaped current through each output driver during the entire transition interval between binary states of a capacitive load. A capacitor fed by a fixed current source is connected across the input of each output driver stage. The fixed current source and capacitor are so selected as to generate across the input of each output driver stage a linear ramp shaped control voltage that regulates the charging/discharging current through the output driver stage and package inductance in the described manner. A specially designed bias circuit reduces the sensitivity of the resulting transient noise to process variations and operating conditions. A feedback connection from the package inductance to the bias control circuit for the fixed current source adjusts the fixed current inversely with the transient noise. A dynamic clamp suppresses voltage spikes extending outside the voltage supply operating range. A bias circuit arrangement compensates for sheet resistivity of the integrated circuit chip. If the resistance value of the sheet drops below a prescribed value, the fixed current is limited so it cannot exceed its designed value.
摘要翻译：在集成电路芯片的输出驱动器处产生的瞬态噪声通过在容性负载的二进制状态之间的整个转换间隔期间保持通过每个输出驱动器的斜坡形状电流而减小。由固定电流源馈送的电容器连接在每个输出驱动级的输入端。固定电流源和电容器被选择为在每个输出驱动级的输入端产生线性斜坡形控制电压，其以所述方式调节通过输出驱动级和封装电感的充电/放电电流。专门设计的偏置电路降低了所产生的瞬态噪声对工艺变化和工作条件的敏感性。从封装电感到用于固定电流源的偏置控制电路的反馈连接将与固定电流反向地调整固定电流与瞬态噪声。动态钳位电压可以抑制电压工作范围以外的电压尖峰。偏置电路布置补偿集成电路芯片的薄层电阻率。如果纸张的电阻值低于规定值，则固定电流受到限制，因此不能超过设计值。

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