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声表面波 ( SAW)滤波器作为 TV、VTR的 IF滤波器 ,设在调谐器的后段用于图象信号处理。 1 998年TV、VTR用 SAW滤波器的世界需求量为 2 1 0 0 0万只 ( TV用为 1 350 0万只 ,VTR用为 650 0万只 ,其他为 1 0 0 0万只 ) ;2 0 0 0年的需求量预计为 2 31 0 0万只 ( TV用为 1 44 0 0万
Surface acoustic wave (SAW) filters are used as IF filters for TVs and VTRs, and are provided in the later stage of the tuner for image signal processing. The world demand for SAW filters for TVs and VTRs in 1998 was 210 million (13.5 million for TV sets, 65.0 million for VTRs and 10 million for others); Demand for 2000 is estimated at 23.1 million (TV use 14.4 million