发明申请
US20070262894A1 Circuit For Reconstructing an Analog Signal From a Digital Signal and Transmission System, Particularly For Wcdma Cellular Telephony, Including Such Circuit
有权
用于从数字信号和传输系统重建模拟信号的电路，特别是用于Wcdma蜂窝电话，包括此类电路
- 专利标题： Circuit For Reconstructing an Analog Signal From a Digital Signal and Transmission System, Particularly For Wcdma Cellular Telephony, Including Such Circuit
- 专利标题（中）： 用于从数字信号和传输系统重建模拟信号的电路，特别是用于Wcdma蜂窝电话，包括此类电路
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申请号： US11569630申请日： 2005-05-19
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公开(公告)号： US20070262894A1公开(公告)日： 2007-11-15
- 发明人: Germano Nicollini , Pierangelo Confalonieri , Riccardo Martignone
- 申请人： Germano Nicollini , Pierangelo Confalonieri , Riccardo Martignone
- 申请人地址： IT Agrate Brianza, Milano I-20041
- 专利权人： STMICROELECTRONICS S.R.L.
- 当前专利权人： STMICROELECTRONICS S.R.L.
- 当前专利权人地址： IT Agrate Brianza, Milano I-20041
- 优先权： EP04425375.5 20040525
- 国际申请： PCT/IT05/00281 WO 20050519
- 主分类号： H03M1/66
- IPC分类号： H03M1/66 ; H04M1/78
摘要：
There is described a circuit for reconstructing an analog signal from a digital signal and wide-band transmission system, particularly for employment in cellular telephony systems, or more in general in mobile communication systems, that adopt the WCDMA standard. The circuit comprises: a digital to analog converter (DAC) suitable for receiving said digital signal and converting it into signal in analog.format;—a low pass-filter (LOW-PASS) connected at the output of said converter for receiving said signal in analog format and providing as output said reconstructed analog signal. Advantageously, the low pass filter (LOW-PASS) is an active filter continuous in time and current coupled to the output of the digital-analog converter (DAC) and the digital-analog converter (DAC) is a converter of the current-steering type functioning at sampling frequency greater than the Nyquist frequency of said analog signal to be reconstructed.
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