Frequency translator using a cordic phase rotator
US7327783B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 2, 2006 |
| Grant date | Feb 5, 2008 |
| Priority date | — |
| Expiry date | Feb 28, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C3/40
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A frequency translator uses a CORDIC phase rotator coupled to a phase accumulator to translate an input signal in frequency. The CORDIC phase rotator performs required phase angle rotations of input vectors using only shift and add operations. Thus, the frequency translator can be readily implemented in hardware. Higher precision arithmetic is used in the CORDIC phase rotator operations than the input vectors contain. To avoid truncation error at the output of the CORDIC phase rotator, stochastic rounding is employed. A dither signal is added to avoid errors due to nonlinear operation of D/A converters, where D/A conversion of the frequency translated signal is required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.