Dtmf Decoder Chip. Fill details get free expert guidance within 24 hours. Mt8870 chip is dtmf tone decoder chip that takes dtmf tone as input and generates 4 bit digital output from 0000 to 1111 for 16 different dtmf tones.
Internally it consist of op amp as an amplifier anti aliasing filter low group bpf high group bpf steering logic circuit and latch output circuit. The filter section uses switched capacitor techniques for high and low group filters. The decoder uses digital counting techniques to detect and decode all 16 dtmf tone pairs into a 4 bit code.
Mt8870 chip is dtmf tone decoder chip that takes dtmf tone as input and generates 4 bit digital output from 0000 to 1111 for 16 different dtmf tones.
Also another 4 digital outputs abcd can use dtmf dial for software control. The mt8870 decoder ic is integrated with an operational amplifier with user adjustable guard time. No of interface channel. Onboard voice input interface for connecting to mobile phones via 3 5 mm stereo cable.
