Method and apparatus for increasing bandwidth in sampled systems
US6542914B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2000 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Sep 26, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems that sample a continuous analog time-domain signal. The invention is particularly applicable to systems 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 system. Furthermore, it is demonstrated that this system can perform this bandwidth increase 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.