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    • 114. 发明授权
    • Method and apparatus for interfacing a processor to a coprocessor
    • 将处理器与协处理器进行接口的方法和装置
    • US06327647B1
    • 2001-12-04
    • US09609260
    • 2000-06-30
    • William C. MoyerJohn ArendsJeffrey W. Scott
    • William C. MoyerJohn ArendsJeffrey W. Scott
    • G06F1500
    • G06F9/3012G06F9/30116G06F9/3861G06F9/3879G06F9/3881
    • A processor (12) to coprocessor (14) interface supporting multiple coprocessors (14, 16) utilizes compiler generatable software type function call and return, instruction execute, and variable load and store interface instructions. Data is moved between the processor (12) and coprocessor (14) on a bi-directional shared bus (28) either implicitly through register snooping and broadcast, or explicitly through function call and return and variable load and store interface instructions. The load and store interface instructions allow selective memory address preincrementation. The bi-directional bus (28) is potentially driven both ways on each clock cycle. The interface separates interface instruction decode and execution. Pipelined operation is provided by indicating decoded instruction discard by negating a decode signal before an execute signal is asserted.
    • 支持多个协处理器(14,16)的协处理器(14)接口的处理器(12)利用编译器可产生的软件类型函数调用和返回,指令执行以及可变加载和存储接口指令。 数据在双向共享总线(28)上的处理器(12)和协处理器(14)之间隐含地通过寄存器窥探和广播来移动,或通过功能调用和返回以及可变负载和存储接口指令明确地移动。 加载和存储接口指令允许选择性存储器地址预增量。 双向总线(28)可以在每个时钟周期两方面潜在地驱动。 接口分离接口指令解码和执行。 通过在执行信号被断言之前否定解码信号来指示解码的指令丢弃来提供流水线操作。
    • 115. 发明授权
    • Method and apparatus for affecting subsequent instruction processing in a data processor
    • 影响数据处理器中后续指令处理的方法和装置
    • US06237089B1
    • 2001-05-22
    • US09425469
    • 1999-10-22
    • William C. MoyerJeffrey W. Scott
    • William C. MoyerJeffrey W. Scott
    • G06F900
    • G06F9/30094G06F9/30079G06F9/30087G06F9/4812
    • A method and apparatus affects subsequent instruction processing in a data processor (10). In one embodiment, a delay interrupt recognition instruction (IDLY4) is executed by data processor (10) to delay or conditionally delay interrupt recognition for a controlled interval, either for a predetermined period of time or for a predetermined number of instructions, so that a read/modify/write sequence of instructions can be performed without dedicated instructions which define the modification operation. The IDLY4 instruction may affect the manner in which subsequent instructions affect a condition bit (38). The condition bit (38) may thus be used to determine if exception processing occurred during the interrupt non-recognition interval after execution of the IDLY4 instruction.
    • 一种方法和装置影响数据处理器(10)中的后续指令处理。 在一个实施例中,延迟中断识别指令(IDLY4)由数据处理器(10)执行以延迟或有条件地延迟中断识别,以控制间隔一段预定的时间段或预定数量的指令,使得 可以在没有定义修改操作的专用指令的情况下执行读取/修改/写入指令序列。 IDLY4指令可能会影响后续指令影响条件位(38)的方式。 因此,可以使用条件位(38)来确定在执行IDLY4指令之后的中断非识别间隔期间是否发生异常处理。
    • 116. 发明授权
    • Tri-level capacitor structure in switched-capacitor filter
    • 开关电容滤波器中的三电平电容器结构
    • US5220483A
    • 1993-06-15
    • US821034
    • 1992-01-16
    • Jeffrey W. Scott
    • Jeffrey W. Scott
    • H01L27/04H01L21/02H01L21/822H01L27/08H01L29/92H03H19/00
    • H01L27/0805H01L28/40
    • A tri-level capacitor structure includes a first shielded metal layer (36) that is disposed between an upper metal layer (38) and a lower polysilicon layer (34). The shielded metal layer (36) is separated from the polysilicon layer (34) by an oxide layer (42), and the upper metal layer (38) is separated from the shielded layer (36) by an oxide layer (44). The upper metal layer (38) and the polysilicon layer (34) are connected together to a node (48) to form an Insensitive Node, whereas the shielded layer (36) is connected to a node (46) that is referred to as the Sensitive Node (S). The capacitor structure is operable to be connected in a switched-capacitor configuration in a lossy integrator, such that the Sensitive Node is connected to the virtual ground of a differential amplifier (50). The integrator utilizing this configuration would be comprised of at least one switched-capacitor (56) on the input that has the plates thereof connected between ground and either an input signal V.sub.IN or the inverting input of the differential amplifier (50) through control switches (62) and (64). The Sensitive Node associated with node (46) is connected to the switch (62) such that it is connected between ground and the inverting input of amplifier (50).
    • 三电平电容器结构包括设置在上金属层(38)和下多晶硅层(34)之间的第一屏蔽金属层(36)。 屏蔽金属层(36)通过氧化物层(42)与多晶硅层(34)分离,并且上部金属层(38)通过氧化物层(44)与屏蔽层(36)分离。 上金属层(38)和多晶硅层(34)一起连接到节点(48)以形成不敏感节点,而屏蔽层(36)连接到被称为 敏感节点(S)。 电容器结构可操作地以有损积分器的开关电容器配置连接,使得灵敏节点连接到差分放大器(50)的虚拟接地。 利用这种配置的积分器将由输入上的至少一个开关电容器(56)组成,该至少一个开关电容器(56)通过控制开关(其中的至少一个开关电容器56)连接在地之间,其输入信号VIN或差分放大器(50)的反相输入端 62)和(64)。 与节点(46)相关联的灵敏节点连接到开关(62),使得它连接在地和放大器(50)的反相输入端之间。
    • 117. 发明授权
    • Low precision finite impulse response filter for digital interpolation
    • 用于数字插值的低精度有限冲击响应滤波器
    • US5212659A
    • 1993-05-18
    • US773044
    • 1991-10-08
    • Jeffrey W. ScottDonald A. KerthShaochyi Lin
    • Jeffrey W. ScottDonald A. KerthShaochyi Lin
    • H03H17/00H03H17/02H03H17/06
    • H03H17/0614H03H17/0671
    • A low precision Finite Impulse Response filter (FIR) is provided for filtering in a digital interpolation operation. The interpolation operation includes two steps, a sampling rate conversion operation for interspersing zeroes between samples in an input sequence and a filtering step of filtering out images that result from this operation. The filtering operation utilizes a FIR filter that utilizes low precision filter coefficients that are selected to tune the frequency response such that the low end frequency response including the pass band, the transition band, and the portion of the stop band immediately after the transition band provides a response equivalent to that commensurate with substantially higher precision FIR filter coefficients, with the high frequency end of the stop band gradually increasing. A second, low pass filter section is provided for filtering out the image energy that exists at the output of the FIR filter in the high frequency end of the stop band to provide an overall filter response that is commensurate to that utilizing substantially higher precision FIR coefficients in the filter section. The FIR filter coefficients utilized are restricted to the set of [-1, 0, +1] such that a multiplierless FIR filter can be realized. The FIR filter coefficients are obtained by processing the infinite FIR filter coefficients through a software delta-sigma quantizer which quantizes the output to the desired low precision FIR filter coefficients.
    • 提供了一种低精度有限脉冲响应滤波器(FIR),用于在数字插值操作中进行滤波。 内插操作包括两个步骤:用于在输入序列中的样本之间散布零的采样率转换操作和滤除由该操作产生的图像的滤波步骤。 滤波操作利用FIR滤波器,该FIR滤波器利用被选择来调谐频率响应的低精度滤波器系数,使得包括通带,过渡频带以及紧接在转换频带之后的阻带的部分的低端频率响应提供 等效于具有与较高精度FIR滤波器系数相当的响应,阻带的高频端逐渐增加。 提供了第二个低通滤波器部分,用于滤除存在于阻带的高频端中的FIR滤波器的输出处的图像能量,以提供与利用基本上更高精度的FIR系数的整体滤波器响应相匹配的整体滤波器响应 在过滤器部分。 所使用的FIR滤波器系数被限制为[-1,0,+1]的集合,使得可以实现无乘法FIR滤波器。 FIR滤波器系数通过软件delta-sigma量化器处理无限FIR滤波器系数来获得,该量化器将输出量化到期望的低精度FIR滤波器系数。