Abstract
The maximum integrated phone (MIP) combines the signaling and speech functions for analog subset applications in a single integrated circuit using a 2.4- mu m CMOS technology. The device can handle both dual-tone multiple-frequency and decadic dialing. A ten-number repertory and a last-number redial function are included. A loudspeaker amplifier allows call progress monitoring during on-hook dialing. Background-noise-reduction circuitry is included in the transmit path to achieve a noise performance of -72 dBV/sub p/ with 50-dB gain. Power is extracted from the line terminals by a synthesized high-impedance current source. The chip is 17-mm/sup 2/ and is presented in a 40-pin dual in-line package.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call