5-GHz SiGeHBT monolithic radio transceiver with tunable filtering

A wide-band CDMA-compliant fully integrated 5-GHz radio transceiver was rea lized In SiGe heterojunction-bipolar-transistor technology with on-chip tun able voltage controlled oscillator (VCO) tracking filters. It allows for wi de-band modulation schemes with bandwidth up to 20 MHz, The receiver has a single-ended single-sideband noise figure of 5.9 dB, more than 40 dB on-chi p image rejection, an input compression point of -22 dBm, and larger than 7 0 dB local-oscillator-Re isolation. The phase noise of the on-chip VCO is - 100 and -128 dBc/Hz at 100 kHz and 5 MHz offset from the carrier, respectiv ely, The transmitter output compression point is +10 dBm, An image rejectio n better than 10 dB throughout the VCO tracking range has been demonstrated in the transmitter with all spurious signals 40 dB below the carrier. The differential transceiver draws 125 mA in transmit mode and 45 mA in receive mode from a 3.5-V supply.