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1. 发明公开

EP2324404A1 ESR ZERO ESTIMATION AND AUTO-COMPENSATION IN DIGITALLY CONTROLLED BUCK CONVERTERS 审中-公开
标题翻译： ESR ZERO估计和自动补偿数字控制降压转换器
公开(公告)号：EP2324404A1
公开(公告)日：2011-05-25
申请号：EP09801087.9
申请日：2009-07-24
申请人： Exar Corporation
发明人： ZHAO, Zhenyu , AHSANUZZAMAN, S. M. , PRODIC, Aleksandar
IPC分类号： G05F1/445
CPC分类号： H02M3/157
摘要： One embodiment of the present invention is a digitally controlled DC-DC converter comprising of a power stage including at least one switch and an output capacitor. A digital controller can control the switching of at least one switch. The digital controller can include logic to produce an indication related to a zero resulting from the equivalent series resistance (ESR) of the output capacitor and to update the control of the switching of the switch in the power stage based on the estimate.

2. 发明授权

EP2008360B1 ELIMINATION OF DUMMY DETECTOR ON OPTICAL DETECTORS USING INPUT COMMON MODE FEEDBACK 有权
标题翻译：虚拟探测器的与输入共模反馈光学探测器处置
公开(公告)号：EP2008360B1
公开(公告)日：2010-07-28
申请号：EP07717636.0
申请日：2007-02-20
申请人： Exar Corporation
发明人： RANDLETT, Richard, W.
IPC分类号： H03F3/08
CPC分类号： H03F3/087 , H03F1/08 , H03F3/45475 , H03F3/45928 , H03F3/45941 , H03F2203/45061 , H03F2203/45078 , H03F2203/45424 , H03F2203/45561

3. 发明公开

EP1829305A2 COMMUNICATIONS SYSTEM WITH SCAN TABLE IDENTIFICATION 审中-公开
标题翻译：与搜索表识别通信系统
公开(公告)号：EP1829305A2
公开(公告)日：2007-09-05
申请号：EP05854191.3
申请日：2005-12-16
申请人： Exar Corporation
发明人： HOMER, Russell , DUONG, Khai, Hoan
IPC分类号： H04L12/56 , H04B10/20
CPC分类号： H04L12/422 , H04J3/085
摘要： A communications system, comprising a first device including a first scan table and a second device including a second scan table. The first device is configured to select the first scan table and transmit scan table identification. The second device is configured to receive the scan table identification from the first device and select the second scan table based on the received scan table identification.

4. 发明公开

EP1665665A1 GENERATING AN ENCAPSULATING HEADER BASED ON ENCAPSULATED INFORMATION PROVIDED AT PROTOCOL-DEPENDENT LOCATIONS 审中-公开
标题翻译： GENERATION包封HEAD ON AN LOG DEPENDENT网站提供的BASIS封装的信息
公开(公告)号：EP1665665A1
公开(公告)日：2006-06-07
申请号：EP04764950.4
申请日：2004-09-08
申请人： Exar Corporation
发明人： BHARDWAJ, Sanjay
IPC分类号： H04L12/56
CPC分类号： H04L45/00 , H04L12/4633 , H04L49/1546 , H04L49/602
摘要： An encapsulation packet is received as a sequence of parallel data segments. First information within the encapsulated packet (11) is obtained based on second information indicative of a location of the first information within the encapsulated packet (11). The encapsulating header is modified based on the first information.

5. 发明公开

EP1235372A3 Second order digital jitter attenuator 审中-公开
标题翻译：数字二阶抖动衰减器
公开(公告)号：EP1235372A3
公开(公告)日：2004-10-13
申请号：EP01308864.6
申请日：2001-10-18
申请人： Exar Corporation
发明人： Gregorian, Roubik , Fan, Shin-Chung
IPC分类号： H04J3/06 , H03L7/00
CPC分类号： H03L7/0992 , H03L7/0814 , H03L7/085 , H03L7/093
摘要： A phase detector (14) which detects the phase difference between the input clock and an output clock. That phase difference is used to gate a high frequency clock, which is provided to an integration circuit (29, 27). The phase detector (14) also indicates whe4ther the phase difference is positive or negative. The output of the integration circuit (29, 27) is provided to a comparator (31), which compares the value to a threshold. When the threshold is exceeded, an advance or retard signal is provided to a phase selector (34). The phase selector (34) selects one of multiple phases of a clock for the output clock.

6. 发明公开

EP1414155A1 Loop filter capacitor multiplication in a charge pump circuit 有权
标题翻译：多层次施工在施密特过滤器缓冲器中
公开(公告)号：EP1414155A1
公开(公告)日：2004-04-28
申请号：EP03024148.3
申请日：2003-10-20
申请人： Exar Corporation
发明人： Chen, Shin Chung , Tso, Vincent Wing Sing
IPC分类号： H03L7/089 , H03B1/00
CPC分类号： H03L7/0896 , H03H11/483 , H03L7/0893
摘要： A charge pump circuit with a small loop filter capacitor is disclosed in the invention. This is accomplished by providing multiple currents which add to the desired current, I. A switching circuit switches one of the currents through the capacitor, while directing a combination of the multiple currents through the resistors. In this way, a smaller current is provided through the capacitor, allowing the capacitor to be much smaller in size.
摘要翻译：环路滤波器包括电容器和电阻器。开关电路通过电容器切换从电流产生电路产生的最小的多个电流，并引导多个电流的组合通过电阻器。还包括以下独立权利要求：（1）差动电荷泵电路; （2）电容积分法; 和（3）单端电荷泵电路。

7. 发明公开

EP1134665A3 UART with compressed user accessible interrupt codes 有权
标题翻译： UART与压缩和由用户访问中断代码
公开(公告)号：EP1134665A3
公开(公告)日：2004-01-14
申请号：EP00308831.7
申请日：2000-10-06
申请人： Exar Corporation
发明人： Wegner, Glenn
IPC分类号： G06F13/38 , G06F13/24
CPC分类号： G06F13/385
摘要： An improved UART (10) which has a number of channels (12), with each channel (12) having a set of channel configuration registers. Each channel configuration register includes an interrupt source register. The interrupt source register has a multi-bit interrupt source code which is used to indicate the source of the interrupt. This code is chosen to be compatible with prior UART devices. The device also includes a bus interface (26), and a plurality of device configuration registers (30) accessible through the bus interface by a user. One of the device configuration registers is an interrupt register (32) which provides a user accessible code to indicate the interrupt source. The code used for the interrupt source is a compressed version of the multiple bit code used in the channel configuration interrupt source register (38, 40). This compression allows more channels to be represented in a single register, while also conveying the interrupt source information quickly to the user. Since the device interrupt register (32) in the configuration registers is for access by the user, rather than internal access by UART drivers, there is no need for compatability with the prior UART drivers.

8. 发明公开

EP1235372A2 Second order digital jitter attenuator 审中-公开
标题翻译： DigitalerZitterdämpferzweiter Ordnung
公开(公告)号：EP1235372A2
公开(公告)日：2002-08-28
申请号：EP01308864.6
申请日：2001-10-18
申请人： Exar Corporation
发明人： Gregorian, Roubik , Fan, Shin-Chung
IPC分类号： H04J3/06 , H03L7/00
CPC分类号： H03L7/0992 , H03L7/0814 , H03L7/085 , H03L7/093
摘要： A phase detector (14) which detects the phase difference between the input clock and an output clock. That phase difference is used to gate a high frequency clock, which is provided to an integration circuit (29, 27). The phase detector (14) also indicates whe4ther the phase difference is positive or negative. The output of the integration circuit (29, 27) is provided to a comparator (31), which compares the value to a threshold. When the threshold is exceeded, an advance or retard signal is provided to a phase selector (34). The phase selector (34) selects one of multiple phases of a clock for the output clock.
摘要翻译：检测输入时钟和输出时钟之间的相位差的相位检测器（14）。该相位差用于对提供给积分电路（29,27）的高频时钟进行选通。相位检测器（14）还指示相位差为正或负。积分电路（29,27）的输出被提供给将值与阈值进行比较的比较器（31）。当超过阈值时，向相位选择器（34）提供提前或延迟信号。相位选择器（34）选择输出时钟的时钟的多个相位之一。

9. 发明授权

EP0284280B1 Adaptive threshold adjustment method and apparatus 失效
标题翻译：自适应阈值调整方法和装置
公开(公告)号：EP0284280B1
公开(公告)日：1991-09-25
申请号：EP88302268.3
申请日：1988-03-16
申请人： EXAR CORPORATION
发明人： Cheng, Jyi-Min , Van Wyngaarden, Julian
IPC分类号： G11B20/10 , G11B5/00 , G11B5/012 , G11B5/016
CPC分类号： G11B20/10009

10. 发明公开

EP0363179A3 Programmable die size continuous array 失效
标题翻译：可编程尺寸连续阵列
公开(公告)号：EP0363179A3
公开(公告)日：1991-01-30
申请号：EP89310158.4
申请日：1989-10-04
申请人： EXAR CORPORATION
发明人： Giannella, Piccolo Giovanni
IPC分类号： H01L27/02 , H01L21/80 , H01L27/118
CPC分类号： H01L27/118
摘要： The present invention covers a semiconductor wafer for semi-custom use in which there are no scribe lines in at least one direction. Electrically isolated cells are provided throughout the wafer. The scribe lines can thus be arbitrarily placed according to an individual customer's instructions, with the isolated cells near the scribe line being covered with metalization to form a bonding pad. Preferably, scribe lines are provided in one direction, either horizontal or vertical. This allows fixed bonding pads to be placed near these scribe lines and allows special components, such as power transistors and ESD protection systems to be placed near the fixed bonding pads. This provides better silicon efficiency than the embodiment with no fixed scribe lines by simplifying the routing. The components which need to be near the bonding pads are placed there, rather than being located randomly throughout the wafer. The customer can then specify a length of a cell which has a fixed height.

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