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    • 41. 发明申请
    • CIRCUIT AND METHOD FOR CORRECTING DUTY CYCLE
    • 校正周期的电路和方法
    • US20090273382A1
    • 2009-11-05
    • US12500007
    • 2009-07-09
    • Dong Suk ShinHyun Woo LeeWon Joo Yun
    • Dong Suk ShinHyun Woo LeeWon Joo Yun
    • H03K3/017
    • H03K5/1565H03K2005/00058H03K2005/00221
    • A circuit configured to correct a duty cycle includes a clock dividing unit configured to delay an input clock signal by a specified delay amount and to generate a plurality of delayed clock signals, a clock selection unit configured to output any one among the plurality of delayed clock signals as a selected delayed clock signal in response to duty ratio information of the input clock signal, an edge control unit configured to generate a falling clock signal by controlling a falling edge of the selected delayed clock signal and to generate a rising clock signal by controlling a falling edge of the input clock signal based on information regarding a difference between lengths of a high duration and a low duration of the input clock signal, and a phase mixing unit for mixing phases of the falling clock signal and the rising clock signal and generating an output clock signal.
    • 配置为校正占空比的电路包括时钟分频单元,被配置为将输入时钟信号延迟指定的延迟量并产生多个延迟时钟信号;时钟选择单元,被配置为输出多个延迟时钟 信号作为响应于输入时钟信号的占空比信息的选择的延迟时钟信号;边缘控制单元,被配置为通过控制所选择的延迟时钟信号的下降沿来产生下降时钟信号,并通过控制产生上升时钟信号 基于关于输入时钟信号的高持续时间和低持续时间之间的差的信息的输入时钟信号的下降沿,以及用于混合下降时钟信号和上升时钟信号的相位的相位混合单元,并产生 输出时钟信号。
    • 45. 发明授权
    • Digitally programmable delay circuit with process point tracking
    • 具有过程点跟踪功能的数字可编程延迟电路
    • US07411434B2
    • 2008-08-12
    • US11684087
    • 2007-03-09
    • Adam L. CarleyDaniel J. AllenJames E. Mandry
    • Adam L. CarleyDaniel J. AllenJames E. Mandry
    • H03L7/06
    • H03K5/133H03K2005/00065H03K2005/00221
    • A digitally programmable delay circuit comprising a plurality of transistors connected in parallel with each other and to a line carrying a signal having an edge to be delayed. One or more of the transistors are selected by a delay control signal to impose a delay amount to the edge, wherein the delay control signal is based on a desired delay amount and a measure of instantaneous process, voltage and temperature conditions of an integrated circuit in which the plurality of transistors are implemented. A selector circuit is responsive to the delay control signal and converts the delay control signal into one or more transistor selection signals to activate one or more of the plurality of transistors. The plurality of transistors may comprise a first sub-circuit having a plurality of transistors of a first type (e.g., P-type) connected in parallel with each other in a ladder configuration, and a second sub-circuit comprising a plurality of transistors of a second type (e.g., N-type) connected in parallel with each other and in a ladder configuration. The overall delay imposed on the edge after it has passed through both sub-circuits has delay contributions from both types of transistors. The delay circuit may have enhanced performance because of finer delay control granularity by providing a first circuit stage that comprises a plurality of transistors for relatively fine delay adjustment to the edge and a second circuit stage that comprises a plurality of transistors for relatively coarse delay adjustment to the edge. A combination of one or more of the transistors in the first and second circuit stages may be selected to produce numerous steps or increments of delay adjustability.
    • 一种数字可编程延迟电路,包括彼此并联连接的多个晶体管以及承载具有待延迟边缘的信号的线。 通过延迟控制信号选择一个或多个晶体管,以对边缘施加延迟量,其中延迟控制信号基于期望的延迟量和集成电路的瞬时过程,电压和温度条件的测量 多个晶体管被实现。 选择器电路响应延迟控制信号并将延迟控制信号转换成一个或多个晶体管选择信号以激活多个晶体管中的一个或多个。 多个晶体管可以包括具有第一类型的多个晶体管(例如,P型)的第一子电路,其以梯形配置彼此并联连接,第二子电路包括多个晶体管, 第二类型(例如,N型),彼此并联并且以梯形结构连接。 在通过两个子电路之后施加在边缘上的总体延迟具有来自两种类型的晶体管的延迟贡献。 延迟电路可以通过提供包括多个用于对边缘进行相对精细的延迟调整的多个晶体管的第一电路级,由于更精细的延迟控制粒度而具有增强的性能,第二电路级包括用于相对粗略延迟调整的多个晶体管 边缘。 可以选择第一和第二电路级中的一个或多个晶体管的组合以产生许多延迟可调性的步骤或增量。
    • 46. 发明授权
    • Delay line trim unit having consistent performance under varying process and temperature conditions
    • 延迟线修剪单元在不同的工艺和温度条件下具有一致的性能
    • US06664837B1
    • 2003-12-16
    • US10247241
    • 2002-09-18
    • Kwansuhk OhRaymond C. Pang
    • Kwansuhk OhRaymond C. Pang
    • H03H1126
    • H03L7/0814H03K5/133H03K2005/00065H03K2005/00221H03L7/0818
    • A delay circuit has a delay that is consistent under varying process and temperature conditions. The delay through a delay path is controlled by inserting resistors on the pull-up and pull-down paths of the delaying inverters. Each resistor has a resistance value that is determined by a varying a number of enabled similarly-sized transistors coupled in parallel across the resistor, rather than by varying the size of a single transistor. In one embodiment, a first transistor in each resistor is always enabled, while additional transistors are enabled using select signals. In one embodiment, the select signals are provided by configuration memory cells in a PLD. Other embodiments include additional delay paths and a multiplexer circuit that selects one of the delay paths. The described delay circuit is particularly useful in a DLL trim unit, where variations between resistors can cause jitter and locking problems in the DLL.
    • 延迟电路具有在变化的工艺和温度条件下是一致的延迟。 通过延迟路径的延迟通过在延迟逆变器的上拉和下拉路径上插入电阻来控制。 每个电阻器具有由在电阻器上并联耦合的使能相似尺寸的晶体管的数量的变化确定的电阻值,而不是通过改变单个晶体管的尺寸来确定。 在一个实施例中,每个电阻器中的第一晶体管总是使能,而使用选择信号启用附加晶体管。 在一个实施例中,选择信号由PLD中的配置存储器单元提供。 其他实施例包括额外的延迟路径和选择延迟路径之一的多路复用器电路。 所描述的延迟电路在DLL修剪单元中特别有用,其中电阻之间的变化可能导致DLL中的抖动和锁定问题。
    • 50. 发明专利
    • Clock data recovery circuit and multiplied clock generation circuit
    • 时钟数据恢复电路和多个时钟发生电路
    • JP2010252244A
    • 2010-11-04
    • JP2009101939
    • 2009-04-20
    • Sony Corpソニー株式会社
    • KIKUCHI HIDEKAZUMOROHASHI HIDEOTANAKA TOMOKAZU
    • H03L7/085H03K5/00H04L7/02
    • H03L7/091H03K5/131H03K2005/00065H03K2005/00221H03L7/0807H03L7/081H03L7/087H03L7/0891H03L7/0898H04L7/033
    • PROBLEM TO BE SOLVED: To provide a clock data recovery circuit and multiplied clock generation circuit, which suppress decrease in reception margin with respect to a phase change in data input, and suppress increase in false reception probability. SOLUTION: A clock data recovery circuit includes: a first phase detector 110 which detects a phase difference between input data and an extraction clock and outputs an analog quantity corresponding to the phase difference; a loop filter 150; charge pumps 130, 140; a VCO 160; a second phase detector 120 for detecting a polarity of the phase difference between the input data and the extraction clock; a phase correction information generation section 210 for generating phase correction information to cancel phase offset of the first phase detector, in accordance with a detection result of the second phase detector; and a phase correction phase information addition section 220 which adds the phase correction information to a loop 200. The phase correction information addition section 220 relatively changes a charging current and a discharging current of the charge pump. COPYRIGHT: (C)2011,JPO&INPIT
    • 解决的问题:提供一种时钟数据恢复电路和倍增时钟产生电路,其抑制数据输入相位变化导致的接收余量的下降,抑制误接收概率的增加。 时钟数据恢复电路包括:第一相位检测器110,其检测输入数据和提取时钟之间的相位差,并输出与该相位差对应的模拟量; 环路滤波器150; 电荷泵130,140; 一个VCO 160; 用于检测输入数据和提取时钟之间的相位差的极性的第二相位检测器120; 相位校正信息生成部分210,用于根据第二相位检测器的检测结果产生消除第一相位检测器的相位偏移的相位校正信息; 以及相位校正信息相加部分220,它将相位校正信息加到环路200上。相位校正信息加法部分220相对地改变电荷泵的充电电流和放电电流。 版权所有(C)2011,JPO&INPIT