公开(公告)号：US08228108B2

公开(公告)日：2012-07-24

申请号：US12898020

申请日：2010-10-05

申请人： Hector Torres ,  Charles Parkhurst

发明人： Hector Torres ,  Charles Parkhurst

IPC分类号： H03K17/16 ,  H03K19/0175 ,  G05F1/10

CPC分类号： G01R31/31928 ,  H03K5/003 ,  H03K5/151

摘要： A level formatter is provided that has differentially coupled closed loop current sources, each configured to precisely establish a current proportional to a reference voltage. A bridge circuit is differentially coupled to two supplementary current sources and controlled to rapidly switch the current from the supplementary current sources to produce output voltages at respective outputs that are approximately equal to respective one of two reference voltages.

摘要翻译： 提供了具有差分耦合的闭环电流源的电平格式器，每个电流源被配置为精确地建立与参考电压成比例的电流。 桥接电路差分耦合到两个辅助电流源，并被控制以从辅助电流源快速切换电流，以产生大致等于两个参考电压中的相应一个的相应输出处的输出电压。

公开(公告)号：US20110095798A1

公开(公告)日：2011-04-28

申请号：US12898020

申请日：2010-10-05

申请人： Hector Torres ,  Charles Parkhurst

发明人： Hector Torres ,  Charles Parkhurst

IPC分类号： H03K5/003

CPC分类号： G01R31/31928 ,  H03K5/003 ,  H03K5/151

摘要： A level formatter is provided that has differentially coupled closed loop current sources, each configured to precisely establish a current proportional to a reference voltage. A bridge circuit is differentially coupled to two supplementary current sources and controlled to rapidly switch the current from the supplementary current sources to produce output voltages at respective outputs that are approximately equal to respective ones of two reference voltages.

摘要翻译： 提供了具有差分耦合的闭环电流源的电平格式器，每个电流源被配置为精确地建立与参考电压成比例的电流。 桥接电路差分耦合到两个辅助电流源并被控制以便从辅助电流源快速切换电流，以产生大致等于两个参考电压中的相应电压的相应输出处的输出电压。

公开(公告)号：US08896323B2

公开(公告)日：2014-11-25

申请号：US13279049

申请日：2011-10-21

申请人： Charles Parkhurst ,  Mark Hamlyn

发明人： Charles Parkhurst ,  Mark Hamlyn

IPC分类号： G01R31/02 ,  H03K19/003 ,  G01R19/165 ,  G01R31/26

CPC分类号： G01R19/16571 ,  H03K19/00338

摘要： Systems and methods for radiation-tolerant overcurrent detection are disclosed. In some embodiments, an integrated circuit may include a plurality of overcurrent detectors, each of the plurality of overcurrent detectors configured to detect a candidate overcurrent event. The integrated circuit may also include a voting circuit coupled to the overcurrent detectors, the voting circuit configured to indicate an overcurrent in response to receiving a selected number of candidate overcurrent events from the overcurrent detectors. At least one of the overcurrent detectors may be subject to detecting the candidate overcurrent in error, at least in part, due to exposure to ionizing radiation.

摘要翻译： 公开了辐射耐受过电流检测的系统和方法。 在一些实施例中，集成电路可以包括多个过电流检测器，多个过电流检测器中的每一个配置成检测候选过电流事件。 集成电路还可以包括耦合到过电流检测器的投票电路，投票电路被配置为响应于从过电流检测器接收到选定数量的候选过电流事件而指示过电流。 过电流检测器中的至少一个可能由于暴露于电离辐射而至少部分地错误地检测候选过电流。

公开(公告)号：US20050127999A1

公开(公告)日：2005-06-16

申请号：US10733022

申请日：2003-12-11

申请人： Charles Parkhurst ,  Muhammad Islam

发明人： Charles Parkhurst ,  Muhammad Islam

IPC分类号： H03F3/45

CPC分类号： H03F3/4508

摘要： A voltage feedback (“VF”) operational amplifier (“op-amp”) that includes a circuit operable to dynamically bias pre-driver transistors at the op amp output stage. This arrangement provides a dynamic bias from a common base gain stage (302) to the pre-drivers (338, 339) of the output stage (303) so that higher slew rate is achieved with minimal discontinuity in the signal.

摘要翻译： 电压反馈（“VF”）运算放大器（“运算放大器”），其包括可操作以在运算放大器输出级上动态地偏置预驱动晶体管的电路。 这种布置提供从公共基极增益级（302）到输出级（303）的预驱动器（338,339）的动态偏置，使得在信号中以最小的不连续性实现更高的转换速率。

公开(公告)号：US08436682B1

公开(公告)日：2013-05-07

申请号：US13279042

申请日：2011-10-21

申请人： Charles Parkhurst ,  Mark Hamlyn

发明人： Charles Parkhurst ,  Mark Hamlyn

IPC分类号： H03F3/45

CPC分类号： H03F3/45183 ,  H03F2203/45248 ,  H03F2203/45454 ,  H03F2203/45566 ,  H03F2203/45648 ,  H03F2203/45658

摘要： Apparatus and methods disclosed herein operate to receive a differential input signal at a first-stage pair of transconductance devices. The differential signal is amplified by a second-order factor at a positive-side or a negative-side first-stage transconductance device, depending upon the polarity of the differential input signal, to create a second-order signal at the output of the appropriate first-stage device. The second-order output signal is then amplified by another second-order factor at a corresponding second-stage transconductance device. A resulting fourth-order signal is made available at an output node as a quartic-response current source. The quartic-response current source may be utilized as a dynamic bias source in conjunction with a linear amplifier to provide a high slew rate amplifier.

摘要翻译： 本文公开的装置和方法用于在第一级跨导装置对接收差分输入信号。 根据差分输入信号的极性，差分信号在正侧或负侧第一级跨导器件被二次因数放大，以在适当的输出端产生二阶信号 第一阶段装置 二阶输出信号然后在相应的第二级跨导器件被另一个二阶因子放大。 得到的四阶信号在输出节点作为四次响应电流源可用。 四线性响应电流源可以与线性放大器一起用作动态偏置源，以提供高转换速率放大器。

公开(公告)号：US08390327B1

公开(公告)日：2013-03-05

申请号：US13214040

申请日：2011-08-19

申请人： Charles Parkhurst ,  Mark Hamlyn

发明人： Charles Parkhurst ,  Mark Hamlyn

IPC分类号： H03K19/0175

CPC分类号： H03K19/0033

摘要： A system and method for radiation-tolerant level shifting are disclosed. In some embodiments, an integrated circuit may include a plurality of level shifters, where each of the plurality of level shifters configured receive a same logic level in a first voltage domain and to output candidate logic levels in a second voltage domain, and where at least one of the candidate logic levels subject to being different from another one of the candidate logic levels. The integrated circuit may also include a voting circuit coupled to the plurality of level shifters, where the voting circuit is configured to evaluate the candidate logic levels and output a selected logic level based, at least in part, upon the evaluation.

摘要翻译： 公开了用于辐射耐受电平转换的系统和方法。 在一些实施例中，集成电路可以包括多个电平移位器，其中配置的多个电平移位器中的每一个在第一电压域中接收相同的逻辑电平，并且在第二电压域中输出候选逻辑电平，并且至少在 候选逻辑电平之一与候选逻辑电平中的另一个不同。 集成电路还可以包括耦合到多个电平移位器的投票电路，其中投票电路被配置为评估候选逻辑电平并且至少部分地基于评估来输出所选择的逻辑电平。

公开(公告)号：US07362176B2

公开(公告)日：2008-04-22

申请号：US11061332

申请日：2005-02-18

申请人： Maria-Flora Carreto ,  Charles Parkhurst

发明人： Maria-Flora Carreto ,  Charles Parkhurst

IPC分类号： H03F3/26

CPC分类号： H03F3/45174

摘要： A linear amplifier is configured with a current-feedback amplifier followed by a voltage-feedback amplifier to drive a totem-pole output stage. The output stage includes a series arrangement of an npn transistor and a pnp transistor with their emitters coupled in series and to an output node. The voltage amplifier driving the output stage is also configured with totem-pole elements, wherein a conductive path between the voltage-feedback amplifier and an output transistor is included to reduce conduction of the output transistor when the opposing output transistor is driven to increase conduction as a result of a high-frequency input signal. A capacitor may be included between the collector and base of a transistor in the circuit path that drives an output transistor in the output stage to briefly reduce its conduction when the opposing output transistor is driven to increase conduction.

摘要翻译： 线性放大器配置有电流反馈放大器，随后是电压反馈放大器以驱动图腾柱输出级。 输出级包括npn晶体管和pnp晶体管的串联布置，其发射极串联耦合到输出节点。 驱动输出级的电压放大器还配置有图腾柱元件，其中包括电压反馈放大器和输出晶体管之间的导电路径，以在驱动相对的输出晶体管时增加输出晶体管的导通，从而增加导通 是高频输入信号的结果。 在驱动输出级中的输出晶体管的电路中的晶体管的集电极和基极之间可以包括电容器，以在驱动相对的输出晶体管以增加导通时短暂地减小其导通。

公开(公告)号：US07078962B2

公开(公告)日：2006-07-18

申请号：US10421970

申请日：2003-04-23

申请人： Charles Parkhurst

发明人： Charles Parkhurst

IPC分类号： G06G7/12

CPC分类号： H03F3/4508 ,  H03F2203/45684

摘要： A dynamic current generator 30 is disclosed in which a common-mode input range is provided which is asymmetric toward the bottom rail VEE. An embodiment of the invention is also disclosed used in an asymmetrical dynamically biased amplifier system 34.

摘要翻译： 公开了一种动态电流发生器30，其中提供对于底部轨道VEE不对称的共模输入范围。 本发明的实施例也被公开在不对称的动态偏置放大器系统34中。

公开(公告)号：US20050128000A1

公开(公告)日：2005-06-16

申请号：US10736178

申请日：2003-12-15

申请人： Charles Parkhurst

发明人： Charles Parkhurst

IPC分类号： H03F1/32 ,  H03F3/45

CPC分类号： H03F3/45094 ,  H03F1/3211 ,  H03F3/45085 ,  H03F2203/45248 ,  H03F2203/45454 ,  H03F2203/45626 ,  H03F2203/45684

摘要： The present invention achieves technical advantages as an operational amplifier (30) having both a high slew rate and a full power bandwidth with low distortion by providing resistors (R6, R7, R9, R10) in place of active loads coupled to a differential pair (Q22, Q25, and Q23, Q24) of transistors in a folded cascode input stage (34). By utilizing passive resistors instead of active loads, no saturation occurs during high slew rate signals. The present invention achieves technical advantages of higher slew rate and lower noise without sacrificing power consumption.

摘要翻译： 本发明通过提供电阻器（R 6，R 7，R 9，R 10）代替具有低失真的有效负载而具有高转换速率和全功率带宽，具有低失真的运算放大器（30） 折叠共源共栅输入级（34）中的晶体管的差分对（Q 22，Q 25和Q 23，Q 24）。 通过利用无源电阻代替有源负载，在高压摆率信号期间不会发生饱和。 本发明实现了较高的转换速率和较低噪声的技术优点，而不牺牲功耗。

公开(公告)号：US20130099796A1

公开(公告)日：2013-04-25

申请号：US13279049

申请日：2011-10-21

申请人： Charles Parkhurst ,  Mark Hamlyn

发明人： Charles Parkhurst ,  Mark Hamlyn

IPC分类号： G01R31/00

CPC分类号： G01R19/16571 ,  H03K19/00338

摘要： Systems and methods for radiation-tolerant overcurrent detection are disclosed. In some embodiments, an integrated circuit may include a plurality of overcurrent detectors, each of the plurality of overcurrent detectors configured to detect a candidate overcurrent event. The integrated circuit may also include a voting circuit coupled to the overcurrent detectors, the voting circuit configured to indicate an overcurrent in response to receiving a selected number of candidate overcurrent events from the overcurrent detectors. At least one of the overcurrent detectors may be subject to detecting the candidate overcurrent in error, at least in part, due to exposure to ionizing radiation.

摘要翻译： 公开了辐射耐受过电流检测的系统和方法。 在一些实施例中，集成电路可以包括多个过电流检测器，多个过电流检测器中的每一个配置成检测候选过电流事件。 集成电路还可以包括耦合到过电流检测器的投票电路，投票电路被配置为响应于从过电流检测器接收到选定数量的候选过电流事件而指示过电流。 过电流检测器中的至少一个可能由于暴露于电离辐射而至少部分地错误地检测候选过电流。