The linear transformation technique extended the field of designing low-sensitivity digital filters from analog prototype, and resulted in a number of different digital structures.
线性变换方法的出现拓宽了由模拟原型设计低灵敏度数字滤波器的领域，形成众多的不同数字结构。
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In addition a digital signal generator was incorporated via a DDS chip AD9850 from Analog Devices inc, featuring accurate frequency preset, quick phase transformation and low phase noise.
As the process of transformation from analog TV to digital TV, more and more citizens contacted with digital TV technology. Set-top-box (STB) had made a key role in this process.