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1. 发明授权

US07236115B1 Distributed current sources for folding ADC amplifier stages 有权
标题翻译：用于折叠ADC放大器级的分布式电流源
公开(公告)号：US07236115B1
公开(公告)日：2007-06-26
申请号：US10763561
申请日：2004-01-22
申请人： Christopher A. Menkus , Robert Callaghan Taft
发明人： Christopher A. Menkus , Robert Callaghan Taft
IPC分类号： H03M1/66
CPC分类号： H03M1/0646 , H03M1/141 , H03M1/366
摘要： A circuit for reducing the maximum magnitude of the total current on each of a plurality of buses for an amplifier stage in a folding analog to digital converter. Each amplifier stage bus couples multiple transconductance circuits to a load. Also, each of the transconductance circuits is configured to output a separate transconductance current to its respective bus. Separate current source circuits are configured to provide a separate source current locally at the output of each of the transconductance circuits such that substantially less than the full amount of each transconductance current reaches the respective bus.
摘要翻译：一种用于减小折叠模数转换器中用于放大器级的多条母线中的每一条总电流的最大幅值的电路。每个放大器级总线将多个跨导电路耦合到负载。此外，每个跨导电路被配置为将单独的跨导电流输出到其相应的总线。单独的电流源电路被配置为在每个跨导电路的输出处局部地提供单独的源极电流，使得实质上小于每个跨导电流的全部量到达相应的总线。

2. 发明授权

US07071670B1 Generating reference voltages 有权
标题翻译：产生参考电压
公开(公告)号：US07071670B1
公开(公告)日：2006-07-04
申请号：US10695921
申请日：2003-10-28
申请人： Ols Hidri , Christopher A. Menkus
发明人： Ols Hidri , Christopher A. Menkus
IPC分类号： G05F3/16
CPC分类号： G05F3/30
摘要： A reference voltage is generated between a first node and a second node. A resistive element and a junction device are coupled in series between the first node and the second node. The junction device includes a junction between dissimilar materials, and has a negative temperature coefficient. First and second current sources route respective first and second bias currents to the resistive element and to the junction device. Routing is such that a resulting first branch current through the resistive element is generally not equal to a resulting second branch current through the junction device. The second bias current depends less on manufacturing process variation than the first bias current, and the second branch current can contain more of it, for less dependence on process. The second bias current can be generated by a source that uses the generated reference voltage as a reference.
摘要翻译：在第一节点和第二节点之间产生参考电压。电阻元件和连接装置串联耦合在第一节点和第二节点之间。接合装置包括不同材料之间的接合部，并具有负温度系数。第一和第二电流源将相应的第一和第二偏置电流路由到电阻元件和连接装置。路由使得通过电阻元件的所得到的第一支路电流通常不等于通过接线装置的所得到的第二支路电流。第二偏置电流的制造工艺变化比第一偏置电流少，而第二分支电流可以包含更多的偏置电流，因为对工艺的依赖性较小。第二偏置电流可以由使用产生的参考电压作为参考的源产生。

3. 发明授权

US07046179B1 Apparatus and method for on-chip ADC calibration 有权
标题翻译：片上ADC校准的装置和方法
公开(公告)号：US07046179B1
公开(公告)日：2006-05-16
申请号：US10817322
申请日：2004-03-30
申请人： Robert C. Taft , Christopher A. Menkus , Maria R. Tursi , Ols Hidri , Andreas Tuechler , Valerie Pons
发明人： Robert C. Taft , Christopher A. Menkus , Maria R. Tursi , Ols Hidri , Andreas Tuechler , Valerie Pons
IPC分类号： H03M1/10
CPC分类号： H03M1/1009 , H03M1/12
摘要： An ADC circuit includes a multiplexer, a calibration circuit, one or more ADC banks, and a calibration ladder, all on an integrated circuit. The calibration resistor ladder is enabled during a calibration phase, and disabled during normal operation. When enabled, the calibration resistor ladder provides a calibration reference signal. Also, the multiplexer provides the calibration reference signal to one or more ADC banks during a calibration phase, and provides an analog input signal to the ADC banks otherwise. The calibration circuit is arranged to provide one or more adjustment signals to the ADC banks to calibrate the ADC banks in response to one or more comparator output signals from the ADC banks.
摘要翻译：一个ADC电路包括一个多路复用器，一个校准电路，一个或多个ADC组和一个校准梯形图，全部在集成电路上。校准电阻梯在校准阶段使能，在正常工作期间禁用。启用后，校准电阻梯形图提供校准参考信号。此外，多路复用器在校准阶段向一个或多个ADC组提供校准参考信号，否则向ADC组提供模拟输入信号。校准电路被布置为响应于来自ADC组的一个或多个比较器输出信号，向ADC组提供一个或多个调整信号以校准ADC组。

4. 发明授权

US06847320B1 ADC linearity improvement 有权
标题翻译： ADC线性度改善
公开(公告)号：US06847320B1
公开(公告)日：2005-01-25
申请号：US10816235
申请日：2004-03-30
申请人： Robert C. Taft , Christopher A. Menkus
发明人： Robert C. Taft , Christopher A. Menkus
IPC分类号： H03M1/12
CPC分类号： H03M1/0646 , H03M1/361 , H03M1/368
摘要： A method and circuit for improving linearity of a folding or flash analog-digital-converter (ADC) circuit. Averaging resistors connect outputs of each of a bank of first pre-amplifiers. A series adjustment resistor is placed between each node connecting the output of a first bank pre-amplifier and the associated averaging resistor, and the input of each of a second bank pre-amplifier. An adjustment current is injected through the adjustment resistor during a calibration. A permanent value for adjustment current is determined such that an effect of offset errors is substantially minimized.
摘要翻译：一种用于提高折叠或闪光模拟数字转换器（ADC）电路的线性度的方法和电路。平均电阻连接一组第一前置放大器的每一个的输出。在连接第一组前置放大器的输出端和相关联的平均电阻器的每个节点和第二组前置放大器之间的每个节点之间放置一个串联调节电阻器。在校准期间通过调节电阻注入调整电流。确定调整电流的永久值，使得偏移误差的影响基本上最小化。

5. 发明授权

US06822600B1 Amplifier array termination 有权
标题翻译：放大器阵列端接
公开(公告)号：US06822600B1
公开(公告)日：2004-11-23
申请号：US10816293
申请日：2004-03-30
申请人： Robert C. Taft , Christopher A. Menkus
发明人： Robert C. Taft , Christopher A. Menkus
IPC分类号： H03M112
CPC分类号： H03M1/089 , H03M1/0646 , H03M1/141 , H03M1/205 , H03M1/361
摘要： A method and circuit for terminating a pre-amplification array for stable linearity of a folding or flash analog-digital-converter (ADC) circuit over a temperature range. Termination resistors with pre-selected temperature coefficients are coupled between outputs of a first and a last amplifier of an amplifier bank in an averaged pre-amplification stage and a termination voltage source. The termination resistors and the termination voltage provide a current that compensates temperature dependent changes in the current flowing from other amplifiers outputs towards the output of the first and last amplifiers stabilizing linearity when temperature changes. Multiple termination resistors with different temperature coefficients may be employed to better approximate the desired temperature coefficient for optimum performance.
摘要翻译：一种用于在温度范围内终止用于稳定线性的折叠或闪光模拟数字转换器（ADC）电路的预放大阵列的方法和电路。具有预选温度系数的终端电阻在平均预放大级和终端电压源中耦合在放大器组的第一和最后一个放大器的输出之间。终端电阻和端接电压提供电流，其补偿从其他放大器输出流向第一和最后放大器的输出的电流随温度变化稳定线性度的温度相关变化。可以使用具有不同温度系数的多个终端电阻器来更好地近似所需的温度系数以获得最佳性能。

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