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    • 63. 发明公开
    • ENHANCED SECOND ORDER NOISE SHAPED SEGMENTATION AND DYNAMIC ELEMENT MATCHING TECHNIQUE
    • VERBESSERTE RAUSCHGEFORMTE SEGMENTIERUNG ZWEITER ORDNUNG UND DYNAMISCHES ELEMENTABGLEICHSVERFAHREN
    • EP2926459A1
    • 2015-10-07
    • EP13859273.8
    • 2013-11-20
    • Analog Devices, Inc.
    • NGUYEN, Khiem, QuangADAMS, Robert
    • H03M1/66
    • H03M1/66H03M1/0668H03M1/067H03M1/74H03M3/464
    • A method and circuit to perform noise shaped splitting of a digital input signal may include using multiple layers to process the input signal. In the first layer, the most significant bits of the input signal may be distributed to a plurality of branches. Dynamic element matching may be performed using the least significant bits of the input signal. Based on the results of the dynamic element matching, values may be added to the plurality of branches. If there is insufficient data activity, dynamics enhancement may be performed to increase the data activity. The output signals of each of the plurality of branches in the first layer may be provided to a second layer, in which these steps can be repeated on each of the output signals. The outputs of the second layer may be provided to a plurality of three level unit elements.
    • 执行数字输入信号的噪声分割的方法和电路可以包括使用多个层来处理输入信号。 在第一层中,输入信号的最高有效位可以被分配到多个分支。 可以使用输入信号的最低有效位来执行动态元素匹配。 基于动态元素匹配的结果,可以将值添加到多个分支。 如果数据活动不足,可能会进行动态增强以增加数据活动。 可以将第一层中的多个分支中的每一个的输出信号提供给第二层,其中可以对每个输出信号重复这些步骤。 第二层的输出可以被提供给多个三级单元元件。
    • 66. 发明公开
    • Current source calibration tracking temperature and bias current
    • Stromquellenkalibrierung mit Verfolgung von Temperatur und Vorspannungsstrom
    • EP2911301A1
    • 2015-08-26
    • EP15151969.1
    • 2015-01-21
    • Analog Devices, Inc.
    • Zhu, HaiyangYang, Wenhua W.Egan, Nathan T.
    • H03M1/10H03M1/74
    • G05F3/02H03M1/1009H03M1/1019H03M1/742
    • In an example embodiment, a circuit is provided that includes a current source with a calibrated trim circuit whose output current varies with transconductance of the current source, and tracks a current mismatch between the current source and another current source under varying bias currents and temperatures. The trim circuit may include at least one calibration digital to analog converter (CAL DAC), which may be driven by a bias circuit generating current proportional to the transconductance of the current source. In an example embodiment, the trim circuit may include at least two CAL DACs, whose output current may vary with bias current only, and with bias current and temperature. A method to calibrate the CAL DACs includes varying calibration settings of the CAL DACs under different bias currents until the output current of the trim circuit substantially accurately tracks the current mismatch under disparate bias currents and temperatures.
    • 在一个示例性实施例中,提供了一种电路,其包括电流源,其具有经校准的微调电路,其输出电流随着电流源的跨导而变化,并且在变化的偏置电流和温度下跟踪电流源与另一电流源之间的电流失配。 微调电路可以包括至少一个校准数模转换器(CAL DAC),其可以由产生与电流源的跨导成比例的电流的偏置电路来驱动。 在一个示例性实施例中,微调电路可以包括至少两个CAL DAC,其输出电流可以仅随偏置电流而变化,并且具有偏置电流和温度。 校准CAL DAC的方法包括在不同偏置电流下对CAL DAC进行不同的校准设置,直到微调电路的输出电流在不同的偏置电流和温度下基本上精确地跟踪电流失配。
    • 68. 发明公开
    • Apparatus and methods for wide bandwidth analog-to-digital conversion of quadrature receive signals
    • 模拟数字万能模拟数码相机
    • EP2908439A1
    • 2015-08-19
    • EP15154558.9
    • 2015-02-10
    • Analog Devices, Inc.
    • Montalvo, AntonioSchubert, Richard P.
    • H04B1/30H04L27/38
    • H04B1/123H03M1/0626H03M1/121H04L27/00H04L27/14H04L27/3863
    • Apparatus and methods for analog-to-digital conversion of quadrature receive signals are provided herein. In certain implementations, a transceiver system includes at least a first pair of analog-to-digital converters (ADCs) associated with a first quadrature receiver channel and a second pair of ADCs associated with a second quadrature receiver channel. The first and second pairs of ADCs can provide analog-to-digital conversion of the same receive signal, but can have different noise profiles relative to one another, such as a low pass noise profile and a band pass noise profile. The transceiver system can further include a reconstruction filter for combining the outputs of at least the first and second pairs of ADCs to generate output signals associated with a lower overall noise profile relative to that of either pair of ADCs alone.
    • 本文提供了用于正交接收信号的模数转换的装置和方法。 在某些实施方式中,收发器系统至少包括与第一正交接收器通道相关联的第一对模拟 - 数字转换器(ADC)和与第二正交接收器通道相关联的第二对ADC。 第一和第二对ADC可以提供相同接收信号的模数转换,但是可以具有相对于彼此的不同噪声分布,例如低通噪声分布和带通噪声分布。 收发器系统还可以包括重构滤波器,用于组合至少第一和第二对ADC对的输出,以产生相对于单独的一对ADC的总噪声分布相对较低的输出信号。