精品国产99久久久久久www_亚洲精彩视频在线观看的_性欧美婬妇ⅹxxx视频_里番肉工口全彩老师_a天堂最新在线观看_精品国产在天天在线观看_免费看那种视频_樱桃电视剧全集播放_成人性视频免费看的鲁片_中国伦理影院

Description

The MT9094 DPhone-II is a fully featured integrated digital telephone circuit. Voice band signals are converted to digital PCM and vice versa by a switched capacitor Filter/Codec. The Filter/Codec uses an ingenious differential architecture to achieve low noise operation over a wide dynamic range with a single 5V supply. A Digital Signal Processor provides handsfree speaker-phone operation. The DSP is also used to generate tones (DTMF, Ringer and Call Progress) and control audio gains. Internal registers are accessed through a serial microport conforming to INTEL MCS-51? specifications. The device is fabricated in Mitels low power ISO2-CMOS technology.

Features

? Programmable μ-Law/A-Law codec and filters

? Programmable CCITT (G.711)/sign-magnitude coding

? Programmable transmit, receive and side-tone gains

? DSP-based:

i) Speakerphone switching algorithm

ii) DTMF and single tone generator

iii) Tone Ringer

? Differential interface to telephony transducers

? Differential audio paths

? Single 5 volt power supply

Applications

? Fully featured digital telephone sets

? Cellular phone sets

? Local area communications stations