Finite impulse response digital to analog converter
US7528754B1 · kind B1 · utility
32Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2007 |
| Grant date | May 5, 2009 |
| Priority date | — |
| Expiry date | Mar 25, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M7/304
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A noise-shaped direct digital IF to RF DAC (DIF2RF) with embedded up-converter mixer is presented. The digital IF signal is noised shaped by a band-pass ΣΔ modulator with a single bit IF output followed by a semi-digital current-mode IF filter to attenuate out-of-band quantization noise. A current steering DAC combines scaled values of local oscillator (LO) signals as current sources for performing current steering and upconversion in a single cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.