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Table 2 from Dual Tone Multi Frequency (DTMF) signal generation and detection using MATLAB software | Semantic Scholar
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Pin configuration of MT8870 DTMF decoder 2.2.1 DTMF Decoder Circuit... | Download Scientific Diagram
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DTMF Decoder IC | DTMF Decoder Working - Electronic Circuits | Engineering Products | EdgeFx - YouTube
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Taidacent DTMF Decoder/Encoder Full Form Dial Tone Generator Dual Tone Multi-Frequency Audio Decoding Digital Display: Amazon.com: Industrial & Scientific
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