公开(公告)号：US07054205B2

公开(公告)日：2006-05-30

申请号：US10695317

申请日：2003-10-28

Applicant: Douglas C. Buhler ,  John Howard Cook, III

Inventor： Douglas C. Buhler ,  John Howard Cook, III

IPC: H03K17/296 ,  G11O17/28 ,  H04J3/06

CPC classification number: G11C7/222 ,  G11C7/22 ,  G11C2207/2254

Abstract: A circuit and method is provided for determining the delay of an integrated circuit common associated with chip-to-chip variations in the manufacturing process, changes in operating voltage, and fluctuations in temperature. A clock signal is inverted, thus generating an inverted clock signal which is then delayed multiple times, resulting in several delayed versions of the inverted clock signal, with each version being delayed a different length of time. The logical state of each delayed version of the inverted clock signal is then stored. That stored logical state provides an indication as to the magnitude of the delay of the integrated circuit which may then be used to tune critical signals of the integrated circuit to avoid timing problems resulting from variations in IC propagation delay.

Abstract translation: 提供了一种电路和方法，用于确定与制造过程中的芯片到芯片变化相关的集成电路的延迟，工作电压的变化和温度的波动。 时钟信号被反相，从而产生一个反相时钟信号，然后被延迟多次，导致反相时钟信号的几个延迟版本，每个版本被延迟不同的时间长度。 然后存储反相时钟信号的每个延迟版本的逻辑状态。 存储的逻辑状态提供关于集成电路的延迟的大小的指示，该延迟的大小然后可以用于调整集成电路的关键信号，以避免由于IC传播延迟的变化而导致的定时问题。

公开(公告)号：US4099259A

公开(公告)日：1978-07-04

申请号：US731248

申请日：1976-10-12

Applicant: Robert Parsons ,  Howard Cook

Inventor： Robert Parsons ,  Howard Cook

IPC: H04N7/025 ,  G09G5/22 ,  G11C8/04 ,  H04L29/00 ,  H04N7/03 ,  H04N7/035 ,  H04N7/088 ,  G06F13/06

CPC classification number: H04N7/0882 ,  G09G5/222

Abstract: In a Teletext transmission system, data is transmitted in digital form during lines in the field blanking period of a composite video signal of a television transmission. On reception, the information is decoded and utilized to provide a display comprising a page having a predetermined number of rows of information in alphanumeric or graphics form. The data is received in blocks comprising information digits and each block has an associated group of address digits so that each block can be directed to an appropriate storage location in a first store, regardless of the order in which the data blocks are transmitted. The contents of the first store can then be transferred in address order into a larger capacity serial store ready for use in generating the display. Thus it is possible for a number of pages of information data to be correctly assembled in serial row order, ready for display generation, in a manner accommodating non-transmitted blank rows.

Abstract translation: 在图文电视传输系统中，数据在电视传输的复合视频信号的场消隐期间的行中以数字形式发送。 在接收时，信息被解码并用于提供包括具有字母数字或图形形式的具有预定数量的信息行的页面的显示。 在包括信息数字的块中接收数据，并且每个块具有相关联的地址数字组，使得每个块可以被引导到第一存储中的适当的存储位置，而不管发送数据块的顺序。 然后可以将第一个商店的内容以地址顺序传送到准备好用于生成显示器的更大容量的串行存储器中。 因此，可以以容纳未发送的空白行的方式，以串行顺序正确地组合多页信息数据，准备好进行显示生成。