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[资料] Digital Automatic level control for ADC

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发表于 2010-8-4 08:48:16 | 显示全部楼层 |阅读模式

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Digital Automatic level control for analog-to-digital conversion

ABSTRACT
The severity of overloads in an analog-to-digital converter circuit
(A/D) as the analog input signal exceeds the dynamic range of the A/D has long been a target for any designer to solve,, Not only the analog signal spectrum becomes infested with fast-rising clipping distortion but the harmonics generated by clipping the high frequencies can "fold back11 and aggrevate the aliasing problem upon digital-to-analog (D/A) conversion,. One obvious solution is to place an automatic gain control (AGC) circuit before the A/D but analog methods generally have failed since the AGC must be "transparent' no degradation to the A/D; and be "threshold"f i„e» inactive until the analog signal approaches overload level; not to mention the side effects of "breathing" or "signal pumping"* With the advent of high-performance digitally-controlled attenuators (DCA8s)s a digital signal processor (DSP) can be utilized to provide precise threshold, instantaneous attack and many programmable features that suffers no drawbacks or side effects of the analog design* Further enhancement techniques can also provide more sophistication such as adaptive control process9

Digital Automatic Level Control for ADC.rar

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发表于 2010-8-4 09:09:49 | 显示全部楼层
dddddddddddddddd
发表于 2010-8-4 10:51:40 | 显示全部楼层
3xsharing
发表于 2010-8-4 10:52:49 | 显示全部楼层
发表于 2010-8-4 16:47:03 | 显示全部楼层
很好的資料,感謝大大無私的分享
很好的資料,感謝大大無私的分享
很好的資料,感謝大大無私的分享
很好的資料,感謝大大無私的分享
很好的資料,感謝大大無私的分享
发表于 2010-8-4 17:48:00 | 显示全部楼层
thanks!
发表于 2010-8-4 20:34:21 | 显示全部楼层
顶一个。
发表于 2010-8-4 21:26:15 | 显示全部楼层
xiexie。。。
发表于 2014-3-25 14:25:58 | 显示全部楼层
xia le kankan ..
发表于 2014-3-27 20:21:56 | 显示全部楼层
感謝 ~~~
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