-
1.发明授权Intermediate frequency (IF) sampling clock-to-clock auto-ranging analog-to-digital converter (ADC) and method 失效中频（IF）采样时钟到时钟自动量程模数转换器（ADC）和方法
公开(公告)号：US5861831A
公开(公告)日：1999-01-19
申请号：US772358
申请日：1996-12-23
CPC分类号： H03M1/186
摘要： A clock-to-clock auto-ranging ADC operates directly on an analog signal in the IF band or higher to track its gain range on a clock-to-clock basis and produce a digital signal that maintains high resolution of the analog signal without clipping or loss of signal sensitivity. This is accomplished by sampling an analog signal of sufficiently high frequency that a peak detector can accurately determine the maximum signal level over at least one-half a signal period and then reset the signal gain going into the ADC prior to the beginning of the next sampling period. This insures that the analog signal will always be within the range of the ADC. In accordance with the well known principles of sampling theory, the sampled analog signal is aliased into the frequency region between DC and one half the sampling frequency.
摘要翻译： 时钟到时钟自动量程ADC直接在IF频带或更高的模拟信号上进行操作，以便在时钟基础上跟踪其增益范围，并产生数字信号，保持模拟信号的高分辨率，无需剪辑 或信号灵敏度损失。 这通过对具有足够高频率的模拟信号进行采样来实现，峰值检测器可以在至少半个信号周期上精确地确定最大信号电平，然后在下一个采样开始之前复位进入ADC的信号增益 期。 这确保模拟信号始终在ADC的范围内。 根据众所周知的抽样原理，采样模拟信号被混叠到DC与采样频率的一半之间的频率区域。
-
公开(公告)号：US5825319A
公开(公告)日：1998-10-20
申请号：US772361
申请日：1996-12-23
申请人： Franklin M. Murden , Harvey J. Ray
发明人： Franklin M. Murden , Harvey J. Ray
IPC分类号： H03M1/44
CPC分类号： H03M1/44
摘要： A high speed wide bandwidth peak detector uses multiple peak detection stages that detect different sub-ranges of a full-scale analog signal range. Splitting the peak detector into multiple stages reduces the number of taps in each stage, and hence their capacitance, which increases their bandwidth. The number of taps can be further reduced by using a non-uniform resolution of the desired full-scale amplitude range. In the preferred embodiment, identical peak detection stages are separated by fixed gain stages that map the different sub-ranges to respective detection stages. This approach minimizes the effects of offset errors in the individual stages but requires gain stages that have wider bandwidths than the detection stages and which can be closely matched to maintain amplitude resolution.
摘要翻译： 高速宽带宽峰值检测器使用多个峰值检测级来检测满量程模拟信号范围的不同子范围。 将峰值检测器分离成多个级别可以减少每个级中的抽头数量，从而减少其电容，从而增加其带宽。 可以通过使用期望的满量程幅度范围的不均匀分辨率来进一步减少抽头的数量。 在优选实施例中，通过将不同子范围映射到各个检测级的固定增益级分开相同的峰值检测级。 这种方法最大限度地减少了各个阶段的偏移误差的影响，但是需要具有比检测级更宽的带宽的增益级，并且可以紧密匹配以保持振幅分辨率。
-
搜索结果
2 条记录 (耗时 0.024 秒)
