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A -90 dBm sensitivity 0.13 �m CMOS bluetooth transceiver operating in wide temperature range

By: Koizumi, M.; Kobayashi, H.; Majima, H.; Agawa, K.; Otsuka, N.; Hamada, M.; Ishizuka, S.; Itoh, N.; Urakawa, G.; Shimizu, Y.; Arai, M.; Nagano, T.;

2007 / IEEE / 978-1-4244-0786-6

Description

This item was taken from the IEEE Conference ' A -90 dBm sensitivity 0.13 �m CMOS bluetooth transceiver operating in wide temperature range ' A 2.4 GHz 0.13 �m CMOS transceiver achieving high RX sensitivity and high-quality TX signals between -40�C and +90�C is presented. A low-IF receiver and direct-conversion transmitter architecture is employed. A temperature compensated receiver chain including LNA achieves a sensitivity of -89.6 dBm even in the worst environmental condition. Linearity optimization for the transmitter chain including a variable biasing circuit in PA reduces the second harmonics of TX signals so that it suppresses the VCO pulling and keeps the carrier frequency drift within 18 kHz.