CORDLESS TELEPHONE SET,申请号JP19900057400-传众专利搜索

CORDLESS TELEPHONE SET

申请公布号：JPH03258060(A)

申请号：JP19900057400

申请日期：1990.03.07

申请公布日期：1991.11.18

申请人：

SHARP CORP

发明人：SUMIKAWA KEIICHIRO;NAKAYAMA HARUYUKI

分类号：H04M1/00;H04B7/26;H04M1/72;H04W76/02;H04W84/10

主分类号：H04M1/00

摘要：PURPOSE:To avoid interference even with simultaneous communication among plural slave sets by providing 1st and 2nd mixer sections and 1st and 2nd intermediate frequency filters and setting the 1st intermediate frequency generated in the 1st mixer section to a frequency different from each reception section. CONSTITUTION:First mixer sections 10, 20, 1st intermediate frequency filters 51, 54, 2nd mixer sections 13, 23 and 2nd intermediate frequency filters 56, 57 are provided and the 1st intermediate frequency generated by the 1st mixer sections 10, 20 is set to a frequency different from each reception section. Thus, even then a 1st local oscillation signal of an optional reception section is inputted to the 1st mixer sections 10, 20 of other reception section, since the generated 1st intermediate frequency is different, only the 1st intermediate frequency corresponding to the reception section is selected and led to a succeeding signal processing system. Thus, even when a 1st local oscillation signal of the optional reception section is inputted, interference of radio communication is prevented.