Title :
A 2.7-V CMOS single-chip baseband processor for CT2/CT2+ cordless telephones
Author :
Crippa, C. ; Nicollini, G. ; Mecchia, A. ; Rizzo, P. ; Confalonieri, P. ; Pernici, S. ; Nagari, A. ; Viani, E. ; Bietti, I. ; Adduci, F. ; Mariani, S. ; Calloni, A. ; Moioli, M. ; Mandelli, S. ; Dallavalle, C.
Author_Institution :
SGS-Thomson Microelectron., Milan, Italy
fDate :
2/1/1999 12:00:00 AM
Abstract :
A low-voltage, low-power CMOS single-chip baseband processor for CT2 and CT2+ cordless telephones is presented. The chip integrates a complete voiceband codec, a tone generator, a G721 adaptive differential pulse code modulation coder/decoder, a burst-mode logic controller for CT2/CT2+ framings, and an I/Q baseband signal generator. The only external components are made of two quartz crystals. The chip is interfaced with standard microcontrollers through a parallel interface. With a 2.7 V minimum supply, it consumes normal and standby powers of 35 mW and 25 μW, respectively. Maximum supply is 5.5 V, and temperature range is from -40 to 70°C. Chip area (including scribe line) is 55.5 mm2 in a 0.8 μm N-well double-metal single-poly CMOS process with implanted capacitors
Keywords :
CMOS integrated circuits; adaptive modulation; cordless telephone systems; differential pulse code modulation; low-power electronics; mixed analogue-digital integrated circuits; signal generators; speech codecs; synchronisation; telephone sets; timing; transceivers; -40 to 70 C; 0.8 micron; 2.7 to 5.5 V; 25 muW; 35 mW; CMOS single-chip baseband processor; CT2 cordless telephones; CT2+ cordless telephones; G721 adaptive differential PCM coder/decoder; I/Q baseband signal generator; N-well double-metal single-poly process; burst-mode logic controller; implanted capacitors; low-power baseband processor; low-voltage baseband processor; parallel interface; pulse code modulation coder/decoder; quartz crystal external component; tone generator; voiceband codec; Adaptive control; Baseband; CMOS process; Codecs; Modulation coding; Programmable control; Pulse generation; Pulse modulation; Signal generators; Telephony;
Journal_Title :
Solid-State Circuits, IEEE Journal of
