CAPACITOR_STORAGE_FEEDBACK_BOXCAR

Published:2009/7/11 4:17:00 Author:May | From:SeekIC

Improves accuracy of radar boxcar without sacrifice in speed, by using feedback principles to overcome instabilities in d-c offset voltages. Feedback forces boxcar output to equal input voltage during sampling, so intemal d-c offsets and instabilities Ionger than one storage interval are inconsequential. Box-car input goes to one terminal of difference amplifier, and boxcar output goes to other terminctl. Difference amplifer output is then used to control capacitor charge. By gating on difference ampliler during sampling interval, boxcctr output is made equcd to value of waveform at that time.-P. E. Harris and B. E. Simmons, DC Accuracy in a Fast Boxcar Circuit Via a Comparator, IEEE Transactions on Electronic Computers, June 1964, p 285-288.



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