Digital comb filter having a cascaded integrator stage with adjustable gain
US6161118A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1998 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Jun 12, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0671
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A comb filter is provided for achieving substantial attenuation of aliasing or imaging bans of a signal to be filtered. The comb filter can perform decimation or interpolation, depending upon its application. Integration can include an integration term with adjustable voltage accumulation at a particular sample point in time. The accumulation factor can be an integer or fractional number and is introduced at a sample count value L within each of M number of samples formed by the rate change switch within the comb filter. The amount of gain being introduced can possibly vary depending on the number of accumulation cycles programmed within configuration registers of the digital signal processor which carries out the comb filter functions. The programmable accumulator avoids having to implement a multiplication operation and the complexities associated therewith.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.