公开(公告)号：US06052569A

公开(公告)日：2000-04-18

申请号：US4249

申请日：1998-01-08

Applicant: Friedhelm Ehrhardt

Inventor： Friedhelm Ehrhardt

IPC: H03J1/00 ,  H04B1/26 ,  H04B1/403 ,  H04H20/55 ,  H04H40/27 ,  H04B1/16

CPC classification number: H04B1/26 ,  H03J1/0083 ,  H04B1/005 ,  H04H20/55 ,  H04B1/406 ,  H04H2201/13 ,  H04H40/27

Abstract: A radio receiver includes a first tuner circuit (1) for receiving radio signals of a first and a second frequency range, and a second tuner circuit (2) for receiving radio signals of a third frequency range. The second tuner circuit (2) is also used for receiving the first frequency range and works independently of the first tuner circuit (1), in that the second tuner circuit (2) includes a first mixer circuit (35, 36, 37) which converts the radio signals of the third frequency range to the second frequency range, and a first integrated circuit element (5) which alternatively converts radio signals of the first frequency range to a first intermediate frequency, or the radio signals of the third frequency range converted to the second frequency range by the first mixer circuit (35, 36, 37) to a second intermediate frequency. The second tuner circuit (2) may derive coded information, more particularly, traffic information from the radio signals of the first frequency range.

Abstract translation: 无线电接收机包括用于接收第一和第二频率范围的无线电信号的第一调谐器电路（1）和用于接收第三频率范围的无线电信号的第二调谐器电路（2）。 第二调谐器电路（2）还用于接收第一频率范围并独立于第一调谐器电路（1）工作，因为第二调谐器电路（2）包括第一混频器电路（35,36,37），第一调谐器电路 将第三频率范围的无线电信号转换为第二频率范围;以及第一集成电路元件（5），其将第一频率范围的无线电信号或第一频率范围的无线电信号 通过第一混频器电路（35,36,37）到第二频率范围到第二中频。 第二调谐器电路（2）可以从第一频率范围的无线电信号导出编码信息，更具体地，导出业务信息。