Power amplifier with noise shaping function
US7843263B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2007 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | May 7, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45134
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A power amplifier with noise shaping function is provided. The power amplifier includes a differential mode integrator, an integration and adjustment unit and a switch unit. The differential mode integrator is used for receiving a differential mode input signal and a differential mode output signal, and outputting a differential mode first signal. The integration and adjustment unit is coupled to the differential mode integrator for receiving the first signal and an output signal and outputting a single-end mode second signal. The switch unit is used for receiving the second signal and outputting the differential mode output signal to drive the load. The present invention uses a common mode input signal instead of the single-end input signal to eliminate the common mode noise, and uses a 2nd-order (or more than that) integrating circuit instead of the conventional filter to achieve a preferred effect of reducing the off band noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.