公开(公告)号：US20060012439A1

公开(公告)日：2006-01-19

申请号：US11168012

申请日：2005-06-28

申请人： Axel Thomsen ,  Ronald Spencer

发明人： Axel Thomsen ,  Ronald Spencer

IPC分类号： H03L7/00

CPC分类号： H03L7/0895 ,  H03D13/004 ,  H03L7/1976

摘要： A phase detector detects a phase difference between a first and second signal received by a phase detector. A charge is supplied by a charge pump circuit that corresponds to the phase difference using a phase difference to charge conversion that is substantially linear and nonzero in a phase error region that includes a phase error transition region around a phase error of zero having both negative and positive phase error values. Dual determinations, q1 and q2, offset from each other are made, of an appropriate charge for a given phase error between the first and second signals. The charge pump supplies as the total charge pump output a charge value representing a combination of q1 and q2, thereby providing a phase error to charge conversion that is substantially linear in the phase error transition region around zero. A first and second output of the phase detector circuit respectively supplying UP and DOWN signals to the charge pump circuit are delayed and supplied as additional outputs of the phase detector circuit and used in generating the dual charge determinations q1 and q2.

摘要翻译： 相位检测器检测由相位检测器接收的第一和第二信号之间的相位差。 由相位差对应的电荷泵电路提供电荷，所述电荷泵电路使用在相位误差区域中基本为线性且非零的相位差的电荷转换，所述相位误差区域包括零​​相位误差为零的相位误差跃迁区域， 正相误差值。 对于第一和第二信号之间给定的相位误差，进行相互偏移的双重确定q1和q2。 电荷泵作为总电荷泵输出表示q1和q2的组合的电荷值，从而在零相位误差过渡区域内提供基本为线性的电荷转换的相位误差。 分别向电荷泵电路提供UP和DOWN信号的相位检测器电路的第一和第二输出被延迟并作为相位检测器电路的附加输出提供，并用于产生双电荷确定q1和q2。

公开(公告)号：US20050212570A1

公开(公告)日：2005-09-29

申请号：US10807852

申请日：2004-03-24

申请人： Lizhong Sun ,  Bruce Signore ,  Axel Thomsen ,  Douglas Pastorello

发明人： Lizhong Sun ,  Bruce Signore ,  Axel Thomsen ,  Douglas Pastorello

IPC分类号： H03K21/08 ,  H03K21/40 ,  H03K23/66

CPC分类号： H03K21/40 ,  H03K21/08 ,  H03K23/667

摘要： A divider is disclosed herein. The divider includes a sequence of divide stages programmably coupled to provide a variety of divide ratios. The divider also includes one or more multiplexers to feedback the output of a divide stage to the input of a divide stage earlier in the sequence of divide stages. The divider may also include duty cycle correction circuitry and self correction logic to correct abnormal logic states. The divide stages can operate in synchronism with each other. Multiplexer functionality, self correction circuitry functionality, and divide stage functionality may be implemented in a combination latch circuit.

摘要翻译： 本文公开了一种分频器。 分频器包括可编程地耦合以提供各种分频比的分频级序列。 分频器还包括一个或多个多路复用器，用于将分频级的输出反馈到除法级序列之前的分频级的输入端。 分频器还可以包括占空比校正电路和用于校正异常逻辑状态的自校正逻辑。 分级阶段可以相互同步运行。 多路复用器功能，自校正电路功能和分频功能可以在组合锁存电路中实现。

公开(公告)号：US06653886B1

公开(公告)日：2003-11-25

申请号：US09054415

申请日：1998-04-03

申请人： Wai Laing Lee ,  Dan Kasha ,  Axel Thomsen

发明人： Wai Laing Lee ,  Dan Kasha ,  Axel Thomsen

IPC分类号： H03K1704

CPC分类号： H03F1/301 ,  H03F1/0261 ,  H03F2200/331 ,  H03K17/04106

摘要： Power available to an amplifier is controlled so that relatively high power is provided during one phase of operation, such as during an interval when slewing could normally occur and relatively low power is provided during another phase. Increased power is provided by switching in parallel current mirrors when power demands are expected to be high, whether or not high power is actually needed in particular interval. A control circuit provides switching of the current mirrors in a way which minimizes disruption of amplifier operation.

摘要翻译： 控制放大器可用的功率，使得在一个操作阶段期间提供相对高的功率，例如在正常发生回转的间隔期间和在另一个相位期间提供相对较低的功率。 当功率需求预期为高时，无论是否在特定间隔内实际需要高功率，通过切换并联电流镜来提供功率。 控制电路以最小化放大器操作中断的方式提供电流镜的切换。

公开(公告)号：US06445330B1

公开(公告)日：2002-09-03

申请号：US09834630

申请日：2001-04-16

申请人： Axel Thomsen ,  Qicheng Yu

发明人： Axel Thomsen ,  Qicheng Yu

IPC分类号： H03M112

CPC分类号： H03M1/0827 ,  H03M1/12

摘要： The present invention provides an alternative to Prior Art isolation techniques by providing a capacitively coupled reference voltage and a capacitively coupled gain calibration. The isolation technique of the present invention is based upon the idea of a near unity gain capacitive divider. If the load or parasitic capacitance is Cload and the isolation capacitance is Ciso, then the gain between input and output can be calculated as Vout/Vin=(Ciso)/(Ciso+Cload), which will be nearly unity (i.e., 1) when Ciso>>Cload. In addition, if Ciso>>Cload, the gain will also be largely insensitive to variations in Ciso and Cload. For example, if Cin is 100 ppm of Ciso, then a 10% variation in Ciso or Cload results in only a 10 ppm variation in the voltage gain.

摘要翻译： 本发明通过提供电容耦合参考电压和电容耦合增益校准来提供现有技术隔离技术的替代方案。 本发明的隔离技术基于近单位增益电容分压器的思想。 如果负载或寄生电容为C负载，隔离电容为Ciso，则输入和输出之间的增益可以计算为Vout / Vin =（Ciso）/（Ciso + Cload），这将几乎是一致的（即1） 当Ciso >> Cload。 另外，如果Ciso >> Cload，增益也将在很大程度上不敏感于Ciso和Cload的变化。 例如，如果Cin是Ciso的100ppm，则Ciso或Cload的10％变化导致电压增益只有10ppm的变化。

公开(公告)号：US06249236B1

公开(公告)日：2001-06-19

申请号：US09054544

申请日：1998-04-03

申请人： Wai Laing Lee ,  Dan Kasha ,  Axel Thomsen

发明人： Wai Laing Lee ,  Dan Kasha ,  Axel Thomsen

IPC分类号： H03M300

CPC分类号： G01V1/245 ,  H03M3/32 ,  H03M3/43 ,  H03M3/448 ,  H03M3/452

摘要： A front end for capturing seismic signals uses a voltage doubling circuit and an analog to digital converter (ADC) having different power levels available during respective operational phases. Power available the ADC is controlled so that relatively high power is provided during one phase of operation, such as during an interval when slewing in a device is expected and relatively low power is provided during another phase. Increased power is provided by switching in parallel current mirrors when power demands are expected to be high, whether or not high power is actually needed in a particular interval. A large step size is selected for the ADC to reduce power consumption for a delta sigma modulator used in the ADC and feedback coefficients are optimized for low power by running at a higher oversampling rate than required by signal to quantization noise requirements.

摘要翻译： 用于捕获地震信号的前端使用在相应的操作阶段期间具有不同功率电平的电压倍增电路和模数转换器（ADC）。 功率可用，ADC被控制，使得在一个操作阶段期间提供相对较高的功率，例如在期望设备中回转的间隔期间，并且在另一阶段期间提供相对较低的功率。 当功率需求预期为高时，不管是否在特定间隔内实际需要高功率，通过切换并联电流镜来提供功率。 ADC选择了大的步长以减少ADC中使用的ΔΣ调制器的功耗，并且通过以比信号对量化噪声要求所需的更高的过采样速率运行，针对低功率优化了反馈系数。