Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 07 Feb 2018 My Price 7.00

DTMF high-band band pass filter

Design a DTMF high-band band pass filter similar to the low-band filter design in Problem 14.51. Be sure to include the fourth high-frequency tone, 1633 Hz, in your design. What is the response amplitude of your filter to the highest of the low frequency DTMF tones?

Problem 14.51

Design a series RLC band pass filter for detecting the low-frequency tone generated by pushing a telephone button as shown in Fig. 14.32.

a) Calculate the values of L and C that place the cutoff frequencies at the edges of the DTMF low-frequency band. Note that the resistance in standard telephone circuits is always R = 600 Ω

b) What is the output amplitude of this circuit at each of the low-band frequencies, relative to the peak amplitude of the band pass filter?

c) What is the output amplitude of this circuit at the lowest of the high-band frequencies?

Answers

Maurice Tutor
(5)
Status NEW Posted 07 Feb 2018 01:02 AM My Price 7.00

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