发明名称 |
Synchronous circuit for FM multiple broadcast receiver |
摘要 |
<p>A receiver receives FM multiplex broadcast data of both RDS and DARC systems by using one front end. A BIC detection circuit (101) detects a block identification code (BIC) included in received data. A coincidence/non-coincidence detection circuit (104) judges whether or not a BIC detection timing is correct and emits a coincidence/non-coincidence pulse. A forward protection circuit (106) counts a frequency of outputs of non-coincidence pulses and retains an established synchronous condition until the counted value exceeds a predetermined value. Then, a forward protection control circuit (108) inhibits the forward protection circuit from performing a count operation while a search is performed for selecting a station. Also, a rearward protection circuit (105) counts a frequency of outputs of coincidence pulses and establishes a synchronous condition when the counted value reaches a predetermined value. Further, a rearward protection control circuit (800) inhibits the rearward protection circuit from performing a count operation while a search is performed.</p> |
申请公布号 |
EP0869610(A2) |
申请公布日期 |
1998.10.07 |
申请号 |
EP19980302345 |
申请日期 |
1998.03.27 |
申请人 |
SANYO ELECTRIC CO., LTD. |
发明人 |
KIMURA, KAZUHIRO;HAYASHIBE, SHIGEAKI;MASUMOTO, TAKAHIKO;HIRAKOSO, YUTAKA;KANEKO, HIROSHI |
分类号 |
H03J1/00;H04H20/26;H04H60/37;(IPC1-7):H03J1/00 |
主分类号 |
H03J1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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