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在调谐电路中利用简单滤波器UAF42将Cos波形转化为Sin
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2009-06-06
笑尽往事
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Many signals are digitally generated or transmitted as square
waves. It is often desirable to convert these signals into sine
waves. For example, the 350Hz, 440Hz, 480Hz, and 620Hz
telephone supervisory tones transmitted over fiber-optics
may appear at curb-side as square waves. To be used in
telephone equipment it is desirable to convert the square
waves into low-distortion sine waves. This can be done with
a simple filter.
waves. It is often desirable to convert these signals into sine
waves. For example, the 350Hz, 440Hz, 480Hz, and 620Hz
telephone supervisory tones transmitted over fiber-optics
may appear at curb-side as square waves. To be used in
telephone equipment it is desirable to convert the square
waves into low-distortion sine waves. This can be done with
a simple filter.
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