A 1-V CMOS/SOI bluetooth RF transceiver for compact mobile applications

A Bluetooth RF transceiver in 0.2-micron CMOS/SOI achieves 1-V operation and paves the way for further system-size reduction by using a small NiH battery. The transceiver integrates a T/R switch, an image-reject mixer, a quadrature demodulator, gm-C filters, an LC- tank voltage-controlled oscillator, a PLL, and a power amplifier. The phase shifter in the quadrature demodulator is tuned dynamically to deal with carrier-frequency drift. A gm cell in the filters uses depletion-mode PMOS transistors and has a folded structure. The transceiver shows -77-dBm sensitivity at 0.1% BER.