Single bit Sigma Delta filter with input gain
US6408031B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1999 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Oct 27, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0411
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital system for filtering a single bit input signal according to the transfer function H(z), wherein H(z) has a gain G, a pole at location b0, and a zero at location a0. The digital system filters the single bit input signal without using computationally expensive multibit multiplication. The digital system achieves these advantages with a digital circuit having a first gain stage generating a gain corrected signal, a delay element generating a delayed gain corrected signal, a feed-forward stage generating a feed-forward signal, and a summer for generating an output signal based upon the sum of the gain corrected signal, the delayed gain corrected signal and the feed-forward signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.