S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Electrical and Computer Engineering (전기·정보공학부) Journal Papers (저널논문_전기·정보공학부)
A 2.4GHz 0.25um CMOS Dual-Mode Direct-Conversion Transceiver for Bluetooth and 802.11b
- Jung, Yeon-Jae; Jeong, Hoesam; Song, Eunseok; Lee, Jungho; Lee, Seung-Wook; Seo, Donghyeon; Song, Inho; Jung, Sanghun; Park, Joonbae; Jeong, Deog-Kyoon; Chae, Soo-Ik; Kim, Wonchan
- Issue Date
- IEEE J. Solid-State Circuits, vol.39, pp.1185-1190
- 802.11b; active filter; Bluetooth; dc-offset cancellation; power-amplifier driver; programmable gain amplifier; receiver; transceiver; transmitter
- A dual-mode transceiver integrates the transmitter
of 0-dBm output power and the receiver for both Bluetooth with
87 dBm sensitivity and 802.11b with 86 dBm sensitivity
in a single chip. A direct-conversion architecture enables the
maximum reuse and the optimal current consumption of the
various building blocks in each mode for a low-cost and low-power
solution. A single-ended power-amplifer (PA) driver transmits
the nominal output power of 0 dBm with 18-dB gain control in
3-dB steps. Only little area overhead is required in the baseband
active filter and programmable gain amplifier (PGA) to provide
the dual-mode capability with optimized current consumption.
The dc-offset cancellation scheme coupled with PGAs implements
the very low high-pass cutoff frequency with a smaller area than
required by a simple coupling capacitor. Fabricated in 0.25- m
CMOS process, the die area is 8.4 mm2 including pads, and
current consumption in RX is 50 mA for Bluetooth and 65 mA for
802.11b from a 2.7-V supply.
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