公开(公告)号：US20040259512A1

公开(公告)日：2004-12-23

申请号：US10819367

申请日：2004-04-06

Applicant: STMicroelectronics S.A.

Inventor： Pierre Busson ,  Pierre-Oliver Jouffre ,  Bruno Paille

IPC: H04B001/18 ,  H04B001/28

CPC classification number: H04N5/4446 ,  H03D7/165 ,  H04B1/28 ,  H04N5/4401 ,  H04N5/455 ,  H04N21/426 ,  H04N21/6112

Abstract: An integrated superheterodyne dual-conversion tuner upconverts a signal so as to place it outside a reception band, and then downconverts the signal with a non-zero intermediate frequency. A first filter of the bulk acoustic wave type is positioned between the up and down conversion and is calibrated in such a way as to accurately determine its central frequency. A second filter of a microelectromechanical type receives the downconverted signal and is calibrated in such a way as to accurately determine its central frequency.

Abstract translation: 集成的超外差双转换调谐器将信号上变频以将其置于接收频带外，然后以非零中频下变频信号。 体声波型的第一滤波器位于上下转换之间，并且以这样的方式进行校准，以便准确地确定其中心频率。 微机电类型的第二滤波器接收下变频信号，并且以这样一种精确地确定其中心频率的方式进行校准。

公开(公告)号：US20040252245A1

公开(公告)日：2004-12-16

申请号：US10819086

申请日：2004-04-06

Applicant: STMicroelectronics S.A.

Inventor： Pierre Busson ,  Pierre-Oliver Jouffre ,  Bruno Paille

IPC: H04N005/455

CPC classification number: H03D7/161 ,  H04N5/4401 ,  H04N21/426 ,  H04N21/6112

Abstract: An integrated circuit includes a dual-conversion tuner, firstly upconverting so as to place a signal outside the reception band, then downconverting with zero intermediate frequency. A bulk acoustic wave type filter is calibrated in such a way as to accurately determine its central frequency. This filter is positioned between the two frequency transposition stages of the tuner. After baseband filtering, the signals are digitized then processed in a digital block BNM which includes a channel decoding module.

Abstract translation: 集成电路包括双转换调谐器，首先上变频以将信号放在接收频带外，然后以零中频下变频。 体积声波型滤波器被校准，以便准确地确定其中心频率。 该滤波器位于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BNM中进行处理。