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1. 发明授权

US06271780B1 Gain ranging analog-to-digital converter with error correction 有权
标题翻译：增益范围模数转换器，具有纠错功能
公开(公告)号：US06271780B1
公开(公告)日：2001-08-07
申请号：US09168601
申请日：1998-10-08
申请人： Xue-Mei Gong , Ka Yin Leung , Eric J. Swanson
发明人： Xue-Mei Gong , Ka Yin Leung , Eric J. Swanson
IPC分类号： H03H188
CPC分类号： H03M3/488 , H04R3/00
摘要： A gain ranging AD converter is provided having two separate gain paths. There is provided a low-gain path and a high-gain path. The low gain path is processed through an analog modulator (333) and then through a filter section to provide on an output of a high-pass filter (339), a low-gain signal which is then compensated for in an equalizer section (347). This equalizing section (347) calibrates the output signal to ensure that the difference between the calibrated signal and the high-gain signal differs only by the fixed gain between the two paths. The high-gain path also includes a modulator (335) for processing through a filter section to provide on the output of a high-pass filter section (343) a high-gain signal. A calibration generator (361) is utilized to generate the parameters for performing the equalization. This calibration generator (361) utilizes both phase and amplitude information from the high-gain path and from both the calibrated low-gain path to generate the calibration parameters for use by the equalizing section (347). Thereafter, the mixing operation is performed to provide a “blend” before summing with a summing junction (351).
摘要翻译：增益测距AD转换器具有两个独立的增益路径。提供了低增益路径和高增益路径。通过模拟调制器（333）处理低增益路径，然后通过滤波器部分提供高通滤波器（339）的输出，然后在均衡器部分（347）中对低增益信号进行补偿）。该均衡部分（347）校准输出信号，以确保校准信号和高增益信号之间的差异仅仅在两条路径之间的固定增益之间不同。高增益路径还包括用于通过滤波器部分处理以在高通滤波器部分（343）的输出上提供高增益信号的调制器（335）。校准发生器（361）用于产生用于执行均衡的参数。该校准发生器（361）利用来自高增益路径的相位和幅度信息以及来自校准的低增益路径的两个相位和幅度信息来生成用于均衡部分（347）的校准参数。此后，执行混合操作以在与求和结（351）相加之前提供“混合”。

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