Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reissue Patent
2005-03-30
2011-10-04
Mai, Tan V (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
Reissue Patent
active
RE042809
ABSTRACT:
delete-start id="REI-00001" date="20111004" ?Systems that sample a continuous analog time-domain signal.delete-end id="REI-00001" ?The invention is particularly applicable to systemsinsert-start id="REI-00002" date="20111004" ?that sample a continuous analog time-domain signal andinsert-end id="REI-00002" ?whose analog components have a bandwidth limit below that desired or specified. The invention has been created to address particular problems in the design of digital sampling oscilloscopes (DSOs) that require more bandwidth than that which is easily achievable through traditionally analog techniques. A method and apparatus are provided in the form of a digital filter that is capable of surgically increasing the bandwidth of the system beyond the bandwidth achievable in an analog systemdelete-start id="REI-00003" date="20111004" ?. Furthermore, it is demonstrated that this system can perform this bandwidth increasedelete-end id="REI-00003" ?without degradation in the time-domain performance of the system such as pulse or step response. In some cases, the time-domain performance is improved by flattening of the frequency response. Additionally, the system, while boosting the bandwidth, is capable of simultaneously removing noise and therefore producing a digitized signal of higher fidelity than that obtained without the filter in place.
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Frommer William S.
Frommer & Lawrence & Haug LLP
LeCroy Corporation
Mai Tan V
LandOfFree
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