A single-chip, 5.15GHz-5.35GHz, 2.4GHz-2.5GHz, 0.18μm CMOS RF transceiver for 802.11a/b/g wireless LAN

The design and development of a 2.4-GHz and 5.7-GHz dual band CMOS transmitter for system-on-chip applications

“…With multiple devices operating in the 2. The architectures presented in the literature [2][3][4][5][6] show how the authors have created dual band systems on a single integrated circuit (IC) using a standard 0.25-um or 0.18-um CMOS process. They consist of a dual band transmitter circuit and also a dual band receiver circuit, together they are commonly referred to as a transceiver that is designed to operate in the IEEE 802.1 la/b/g frequency range.…”

“…The dual band transmitter architectures shown in [3][4][5][6] The architecture referenced in [4] to create the 5.7 GHz carrier frequency uses two voltage controlled oscillators (VCOs) controlled by a frequency synthesizer: VCOI has an operating range from 3.2 -3.6 GHz, and VC02 operates from 3.5 -3.9 GHz. An automatic VCO band selection scheme is implemented for auto switching of VCOs based on tuning voltage and reference levels.…”