| 摘要 |
PROBLEM TO BE SOLVED: To provide a receiver structure, especially for digital television broadcasting service. SOLUTION: This structure has at least one first frequency translation unit (2) which has a signal input part, a local oscillator input unit, and an output unit. At least one first frequency translation unit (2) is designed so that a signal applied to the input side can be changed into an intermediate frequency. Further, it has a first amplifier (6a). This first amplifier is designed to comprise a gain for guaranteeing signal level attenuation of a filter (7) connected to the downstream of the first amplifier (6a). The first amplifier (6a) is connected with an output portion of the frequency translation unit (2). Further, it has an intermediate frequency amplifier (8) comprising a variable gain coefficient. This intermediate frequency amplifier is connected with the first amplifier (6). At least one first frequency translation unit (2) and the first amplifier (6a) are formed in a common semiconductor body (1). COPYRIGHT: (C)2006,JPO&NCIPI |
