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A 3 V GSM baseband transmitter

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1 Author(s)
C. S. Wong ; LSI Logic Corp., Milpitas, CA, USA

A dual-channel baseband transmitter has been designed for GSM cellular phone application. It has been fabricated in a 0.35 /spl mu/m digital CMOS process as part of a single-chip solution for baseband processing. Each channel consists of a switched-capacitor DAC, a switched-capacitor filter, a class AB buffer, and an active RC filter. The lack of on-chip precision capacitors and resistors poses a major challenge in designing these analog building blocks. The current consumption is 8.8 mA and the total active area is 5.1 mm/sup 2/. The channel response meets the GMSK spectral mask, and a real GSM call has been made with this transmitter.

Published in:

VLSI Circuits, 1998. Digest of Technical Papers. 1998 Symposium on

Date of Conference:

11-13 June 1998