公开(公告)号：US20040257480A1

公开(公告)日：2004-12-23

申请号：US10814621

申请日：2004-03-31

Applicant: STMicroelectronics S.A.

Inventor： Pierre Busson ,  Daniel Saias ,  Frederic Paillardet ,  Franck Montaudon

IPC: H04N005/50

CPC classification number: H04N5/4446 ,  H03D3/007 ,  H03D7/161 ,  H04L2027/0016 ,  H04L2027/0024 ,  H04N5/4401 ,  H04N5/455 ,  H04N21/426 ,  H04N21/6112

Abstract: A dual-conversion tuner firstly upconverts so as to place itself outside the receive band and then downconverts with zero intermediate frequency. A filter of the surface acoustic wave type is disposed between the two frequency transposition stages of the tuner. After baseband filtering, the signals are digitized then processed in a digital block comprising a channel decoding module. With the exception of the surface acoustic wave filter, the components are entirely embodied in integrated fashion.

Abstract translation: 首先将双转换调谐器上变频，将其自身置于接收频带外，然后以零中频下变频。 表面声波型滤波器设置在调谐器的两个频率转置级之间。 在基带滤波之后，信号被数字化，然后在包括信道解码模块的数字块中进行处理。 除了表面声波滤波器之外，组件完全以整体方式体现。