Circuit for reconstructing an analog signal from a digital signal and transmission system, particularly for WCDMA cellular telephony, including such circuit
US7400285B2 · kind B2 · utility
3Cited by
8References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 2005 |
| Grant date | Jul 15, 2008 |
| Priority date | — |
| Expiry date | May 19, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/707
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A circuit for reconstructing an analog signal starting from a digital input signal includes a digital to analog converter and a low pass-filter connected at the output of the converter for receiving the analog format signal and outputting a reconstructed analog signal. The low pass filter is an active filter continuous in time and current-coupled to the output of the digital-analog converter. The digital-analog converter is of the current-steering type functioning at a sampling frequency greater than the Nyquist frequency of the analog signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.