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U4091BM-R Datasheet(PDF) 1 Page - ATMEL Corporation |
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U4091BM-R Datasheet(HTML) 1 Page - ATMEL Corporation |
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1 / 38 page  Features • Speech Circuit with Anti-clipping • Tone-ringer Interface with DC/DC Converter • Speaker Amplifier with Anti-distortion • Power-supply Management (Regulated and Unregulated) and a Special Supply for Electret Microphone • Voice Switch • Interface for Answering Machine and Cordless Phone Applications • Feature Phone • Answering Machine • Fax Machine • Speaker Phone • Cordless Phone Benefits • No Piezoelectric Transducer Necessary for Tone Ringing • Complete System Integration of Analog Signal Processing on One Chip • Very Few External Components 1. Description The programmable telephone audio processor U4091BM-R is a linear integrated cir- cuit for use in feature phones, answering machines and fax machines. It contains the speech circuit, tone-ringer interface with DC/DC converter, sidetone equivalent and ear-protection rectifiers. The circuit is line-powered and contains all components nec- essary for signal amplification and adaptation to the line. The U4091BM-R can also be supplied via an external power supply. An integrated voice switch with loudspeaker amplifier enables hands-free or open-listening operation. With an anti-feedback func- tion, acoustic feedback during open listening can be reduced significantly. The generated supply voltage is suitable for a wide range of peripheral circuits. Programmable Telephone Audio Processor U4091BM-R Rev. 4872A–CORD–08/05 |
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