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A CMOS 64MSps 20mA 0.85mm2 baseband I/Q modulator performing 13 bits over 2MHz bandwidth

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3 Author(s)
Pinna, C. ; Cellular Terminal Div., STMicroelectronics - Telecom Group, Milano, Italy ; Mecchia, A. ; Nicollini, G.

A CMOS 64MSps 2-1-1 cascaded ΣΔ I/Q modulator optimized for WCDMA applications achieves more than 13 bits over 2MHz bandwidth. A new way for sizing cascaded ΣΔ architectures based on comparator equivalent gain, and an improved dynamic element matching method resulted into an area and power efficient modulator design. The total consumption of two modulators plus built-in voltage and current reference generators is about 20mA at 2.7V. Total active area is 0.85mm2 in a 0.35 μm CMOS technology.

Published in:

VLSI Circuits, 2004. Digest of Technical Papers. 2004 Symposium on

Date of Conference:

17-19 June 2004

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