A 900 MHz image-reject transceiver Si bipolar IC

An ISM-band transceiver chip includes an LNA, image-reject up- and down-converters, a VCO, a /64/65 dual-modulus prescaler, an IF Limiting amplifier/RSSI strip, and a voltage regulator. The IC operates from a single-supply down to 3.0 V and is optimized for a 10.7 MHz IF frequency to allow use of very low-cost ceramic filters. The 6.8 mm/sup 2/ chip is fabricated using a 24 GHz f/sub T/ Si bipolar process and mounted in a 28 pin SSOP package.