Receiver with an antenna switch, in which sensitivity and quality of reception is improved,申请号US19970880766-传众专利搜索

Receiver with an antenna switch, in which sensitivity and quality of reception is improved

申请公布号：US6009316(A)

申请号：US19970880766

申请日期：1997.06.23

申请公布日期：1999.12.28

申请人：

NEC CORPORATION

发明人：TSUJI, KAZUSHI

分类号：H04B1/10;H04B1/18;H04B1/44;H04B1/46;H04B1/56;(IPC1-7):H04Q7/32

主分类号：H04B1/10

摘要：In a receiver having an antenna switch (23) which is connected between a receiving section (24) and an antenna (21) for adjusting a received signal so that the received signal has, as a current signal level, one of a first and a second signal level, a switch control section (26) controls an operation of the antenna switch by the use of a current signal level of the received signal and a first and a second reference level which are determined in first and second determining sections (27, 28), respectively. In order to detect the current signal level, a signal level detection circuit (25) is connected to the antenna switch. It is preferable that a signal level holding circuit (34) is connected between the signal level detection circuit and the switch control section and is for holding the current signal level during a predetermined time duration.