The BT2084A is a highly integrated low power silicon BiCMOS RF transceiver designed for dual-band GSM900 and DCS1800/PCS1900 handset applications. The BT2084A consists of a receiver, transmitter, and both IF and RFLO buffer sections. The receiver can be divided into two sections. The first section is the receiver front-end which consists of a low noise amplifier (LNA), image-reject downconversion mixers and an IF output buffer. This section provides amplification for the incoming signal with low noise and high linearity. It also provides more than 35dB image suppression and 20dB gain control. The second section consists of an IF input buffer, IF downconversion mixer, automatic gain control (AGC), I/Q demodulator, baseband channel select filter, and a baseband buffer. This section provides second downconversion and I/Q demodulation to the channel-selected signal and an additional on-chip channel selection. The IF input buffer and AGC perform over 90dB gain control in 2dB steps.