Title :
An analog/digital interface for cellular telephony
Author :
Van Bavel, Nicholas ; Maulic, P.C. ; Albright, Keith S. ; Gong, Xue-Mei
Author_Institution :
Crystal Semicond. Corp., Austin, TX, USA
Abstract :
This paper describes a mixed-signal ASIC for dual-mode (analog/digital) cellular telephony applications. It consists of two transmit and receive channels for the I and Q channels of a quadrature phase shift keying (QPSK) modulation system. It also includes three 8-bit DAC´s for control purposes as well as a bandgap voltage reference and bus interface circuitry. The chip is part of a 4-chip chipset implementation of an IS-54 dual mode telephone
Keywords :
cellular radio; digital radio; mixed analogue-digital integrated circuits; quadrature phase shift keying; telephone equipment; 8 bit; I channel; IS-54 dual mode telephone; Q channel; analog/digital interface; bandgap voltage reference; bus interface circuitry; cellular telephony; chipset; control DACs; mixed-signal ASIC; quadrature phase shift keying modulation; receive channel; transmit channel; Clocks; Delta modulation; Low pass filters; Modems; Operational amplifiers; Passband; Quadrature phase shift keying; Radio frequency; Telephony; Time division multiple access;
Conference_Titel :
Custom Integrated Circuits Conference, 1994., Proceedings of the IEEE 1994
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-1886-2
DOI :
10.1109/CICC.1994.379695
