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1. 发明授权

US06486808B1 Data signal amplifier with automatically controllable dynamic signal range 有权
标题翻译：数据信号放大器可自动控制动态信号范围
公开(公告)号：US06486808B1
公开(公告)日：2002-11-26
申请号：US09978727
申请日：2001-10-16
申请人： Edward Seppi , Edward Shapiro , George Zentai , Richard Colbeth
发明人： Edward Seppi , Edward Shapiro , George Zentai , Richard Colbeth
IPC分类号： H03M184
CPC分类号： H03M1/129 , H03M1/18 , H04N5/235 , H04N5/243 , H04N5/32
摘要： A preamplifier stage with dynamically controllable signal gain in a data signal processing circuit that includes a downstream analog-to-digital signal converter. The level of the data signal subsequent to its preamplification is monitored and the gain of the preamplifier stage is dynamically adjusted in response to such data signal transcending one or more predetermined thresholds. Hence, the effective dynamic range of the preamplifier stage is extended, thereby also effectively extending the dynamic range of the overall system beyond that to which it would have otherwise been limited by the dynamic range of the analog-to-digital signal converter. In accordance with a preferred embodiment of the invention, such a preamplifier is used in an X-ray imaging system such as that using flat panel solid state imaging devices.
摘要翻译：一种在包括下游模拟 - 数字信号转换器的数据信号处理电路中具有动态可控的信号增益的前置放大器级。监视其预放大之后的数据信号的电平，并响应于超过一个或多个预定阈值的这种数据信号来动态调整前置放大器级的增益。因此，前置放大器级的有效动态范围被扩展，从而也有效地扩展了整个系统的动态范围，超出了其将被模拟 - 数字信号转换器的动态范围所限制的范围。根据本发明的优选实施例，这种前置放大器用于诸如使用平板固态成像装置的X射线成像系统中。

2. 发明授权

US06522272B2 Analogue frontend 有权
标题翻译：模拟前端
公开(公告)号：US06522272B2
公开(公告)日：2003-02-18
申请号：US09780936
申请日：2001-02-09
申请人： Andreas Menkhoff , Peter Schöllhorn
发明人： Andreas Menkhoff , Peter Schöllhorn
IPC分类号： H03M184
CPC分类号： H04B1/0007 , H04B1/18 , H04B1/30
摘要： An analogue frontend, such as is used, for example, in receivers for communications equipment, comprises a plurality of analogue components (1-3) which are connected upstream of an analogue/digital converter (4). In order to control the drive level of the individual analogue components (1-3) precisely, the input of the analogue/digital converter (4) can optionally be connected via a switch-over device (8) to the output of any one of the analogue components (1-3) and a drive level control signal for the respective analogue component (1-3) can be generated by a digital control device (5) by evaluating the sampled value which is then supplied by the analogue/digital converter (4).
摘要翻译：诸如在用于通信设备的接收机中使用的模拟前端包括连接在模拟/数字转换器（4）的上游的多个模拟组件（1-3）。为了精确地控制各个模拟部件（1-3）的驱动电平，模拟/数字转换器（4）的输入可以可选地通过切换装置（8）连接到任何一个的输出数字控制装置（5）可以通过对采样值进行评估，然后由模拟/数字转换器（1-3）提供模拟组件（1-3）和相应的模拟组件（1-3）的驱动电平控制信号（4）。

3. 发明授权

US06489911B1 Direct digital waveform synthesizer with DAC error correction 有权
标题翻译：具有DAC错误校正的直接数字波形合成器
公开(公告)号：US06489911B1
公开(公告)日：2002-12-03
申请号：US09974489
申请日：2001-10-10
申请人： Thomas G. O'Dwyer
发明人： Thomas G. O'Dwyer
IPC分类号： H03M184
CPC分类号： G06F1/0328 , G06J1/00 , H03M1/1038 , H03M1/1047 , H03M1/66
摘要： A direct digital waveform synthesiser with DAC error correction includes a digital to analog converter system for producing a desired output waveform and having between its digital and analog output a characteristic having a linear component and a non-linear component; and a phase to amplitude converter including a storage device responsive to phase inputs to provide to the digital to analog converter system amplitudes modified to compensate for the non-linear component of a characteristic of the digital to analog converter system.
摘要翻译：具有DAC误差校正的直接数字波形合成器包括用于产生期望的输出波形并且在其数字和模拟输出之间具有线性分量和非线性分量的特征的数模转换器系统; 以及相位到幅度转换器，其包括响应于相位输入的存储装置，以提供经修改的数模转换器系统幅度，以补偿数模转换器系统的特性的非线性分量。

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