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Author:
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Year:
Volume:
Issue:
zui xin av ji cheng dian lu bao dao
Author(s):
JIANG Shan
Pages:
37
-
38
Year:
1999
Issue:
4
Journal:
Practical Audio-Visual Technique
Keyword:
集成电路
;
下变频器
;
音量控制器
;
零中频
;
数字视频广播
;
广播接收机
;
中频带通滤波器
;
解码器
;
残留边带
;
正交移相键控
;
Abstract:
<正> TDA8060零中频QPSK下变频器IC 飞利浦公司最近推出世界上第一种用于数字卫星广播接收机的零中频QPSK(正交移相键控)下变频器IC,它直接处理卫星抛物面天线的输出信号,省去了卫星频率混频/振荡器、中频带通滤波器和中频放大器,使DVB(数字视频广播)和DBS(数字广播卫星)接收机只需使用3只低价IC即可起到目前5只以上IC才能起到的作用。不仅降低了器件成本,还省去了中放级调试,其总的生产成本节约量可高达30%,设备体积也减小了。
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