An IEEE 802.11 and 802.16 WLAN Wireless Transmitter Baseband Architecture with a 1.2-V, 600-MS/s, 2.4-mW DAC

Abstract

In this paper, we propose a transmitter baseband architecture for the present and up-coming WLAN applications (IEEE 802.11a/g, 802.11n, 802.16), based on a 600-MS/s current-steering DAC with a passive output load, to perform the baseband signal processing, avoiding the use of any active analog reconstruction filter. The DAC, fabricated in a 0.13-lm CMOS technology, consumes 2.4 mW from a 1.2-V single supply voltage. The DAC exhibits 68 dB of SFDR at full-scale for a 12-MHz input signal frequency and 9.7 bits of full-scale dynamic range in the bandwith from dc to 10 MHz.

A 12-Bit 1-Gsample/s Nyquist Current-Steering DAC in 0.35 µm CMOS for Wireless Transmitter

“…As the new standards will present a larger signal bandwidth (25 MHz for the upcoming IEEE 802.16, for instance [5]), the use of traditional transmission (TX) baseband architectures will result in a more and more critical design of the analog filters, since their cut-off frequency has to be increased (with an increasing sensitivity to the lower CMOS gain and to the non-dominant poles) [6]. Figure 3 shows this work which exploits the DAC oversampling ratio (OSR) to avoid the use of an active analog reconstruction filter [2].…”

Design of a 12-bit high-speed CMOS D/A converter using a new 3D digital decoder structure useful for wireless transmitter applications

“…Due to the upcoming higher data rate standards (IEEE 802.16 and 802.11n, for instance), future implementations will involve with several critical issues on this baseband section architecture. As the new standards will present a larger signal bandwidth (25 MHz for the upcoming IEEE 802.16, for instance [5]), the use of traditional transmission (TX) baseband architectures will result in a more and more critical design of the analog filters, since their cut-off frequency has to be increased (with an increasing sensitivity to the lower CMOS gain and to the non-dominant poles) [6]. Figure 3 shows this work which exploits the DAC oversampling ratio (OSR) to avoid the use of an active analog reconstruction filter [2].…”