AN4980

DTMF/FSK Modem for Medical

制造商

应用类别Wired Communication

产品类型Modems

针对最终产品Cellular Phone, Industrial, Smart Phone, Set-Top Box, Medical and Healthcare, Telemetry, Automatic Teller Machine, Card Reader, Electronic Meter, Caller ID, POS Register, Gas and Water Meter

描述

Configuration for Bell 202 2-Wire Dial-Up Half Duplex Operation. The switches U2A and U2C connect R2 and C1 across the transformer while receiving, while R1 is used for impedance matching while transmitting with U2B and U2D turned on

AN4980

描述

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