Non-linear function generating circuit and method
US6307493A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 28, 1999 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | May 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F7/602
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Apparatus, and method, for producing a signal representative of a non-linear function of an input signal. The apparatus includes a feedback loop having a sigma-delta modulator fed by the input signal and a feedback signal, such feedback signal being a non-linear function of the output of the modulator. The output of the sigma-delta modulator is a stream of m-bit digital words. The output of the sigma-delta modulator is fed to an filter for converting the stream of m-bit digital words produced by the sigma-delta modulator into a corresponding stream of n-bit digital words. The n-bit and m-bit streams of digital words are fed to a multiplier. The multiplier produces an series of digital words, each one of the digital words representing the product of one of the n-bit digital words and a one of the n-bit digital words. The series of digital words produced by the multiplier is fed to the sigma-delta modulator as the feedback signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.