High pass filtering with automatic phase equalization
US6271778A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2000 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Jan 15, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system and method for selectively providing high pass filtering of two digital signals that are to be subsequently combined. Each of the first and second signals is passed through one of a high pass filter, an all-pass filter and a module that performs substantially no signal filtering, where the phase and magnitude for either high pass filter are substantially equal to the phase and magnitude for either all-pass filter. At the minimum, the system provides the following filtering combinations for the respective first signal and second signal: (no filter, no filter), (high pass, high pass), (high pass, all-pass) and (all-pass, high-pass). Suitable first order high pass and corresponding all-pass filters are determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.