Title :
Fully Integrated Analog Telephone
Author :
Moons, E. ; Willocx, E. ; Rabaey, D.
Author_Institution :
Alcatel Bell Telephone, Francis Wellesplein 1, 2018 Antwerp, Belgium; CENTRAL HARDWARE DIVISION - MICROELECTRONICS DEPARTMENT
Abstract :
The design of a CLSI for analog subset applications is presented. The MIP (Maximum Integrated Phone) combines extended signalling and speech functions in a single integrated circuit using a 2.4 micron CMOS technology. A loudspeaker amplifier included in the receive path permits on hook dialing and group listening. A synthesized high impedant current source extracts the power available on the line terminals. The noise requirements of -72 dBVp with 50 dB gain could be achieved by implementing a low noise preamplifier and with integration of a background noise reduction circuit in the transmit path. Packaged in a 40 pins DIL the MIP-device offers a cost effective solution for future low-, medium- and high-end subset applications.
Keywords :
Background noise; CMOS integrated circuits; CMOS technology; Integrated circuit synthesis; Integrated circuit technology; Loudspeakers; Noise reduction; Signal synthesis; Speech; Telephony;
Conference_Titel :
Solid-State Circuits Conference, 1988. ESSCIRC '88. Fourteenth European
Conference_Location :
Manchester, UK
