Second order noise coupling with zero optimization modulator and method
US8390494B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2011 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Jun 16, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/424
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for a modified noise-coupled modulator using zero optimization technique is disclosed. By realizing the resonator coefficient as a part of branches other than those of the main transfer function, the problem of improving SQNR without degrading other specifications is solved. Second order noise coupling is used to implement zeros without using feedback branches going into the first integrator. Embodiments use a first-order modulator, second-order noise coupling and a resonator. It allows lower power consumption and smaller size by removing small capacitor values and gain factors and reducing the number of amplifiers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.