The 20 Hz signal that rings a telephone's bell has to PRSPECTIVE nav e a ver y l a rg e
Chapter 14, Problem 14.48(choose chapter or problem)
The 20 Hz signal that rings a telephone's bell has to PRSPECTIVE nav e a ver y l a rg e amplitude to produce a loud DESIGN"" enough bell signal. How much larger can the ringing signal amplitude be, relative to the low-bank DTMF signal, so that the response of the filter in 14.46 is no more than half as large as the largest of the DTMF tones?
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