Design of RF tuner for cable modem applications

An integrated RF tuner, operating in 40 MHz- 900 MHz bandwidth for cable modem is presented using TSMC 0.35 /spl mu/m (four metal, double poly) process. RF tuners always have external components which increases board space and cost. The complete monolithic RF tuner will be a cost, area and power efficient solution for DOCSIS standard high speed (10 Mbps-30 Mbps) cable modems. The designed RF tuner has an end to end gain of 0 dB, and adjacent channel rejection of -34 dB without any external SAW filters. The total area is 3m.m./spl times/3m.m. with a power consumption of 680 mW with a 3.3V supply.