W-CDMA Upconverter Outfits 3G Basestations

Suitable for use in 3G wireless basestations, the GC4116 upconverter is said to be the industry's first commercially available digital transmitter chip to provide two independent, 3G W-CDMA channels. It also claims to be the first with an extended dynamic range with up to 22 output bits and the only transmitter that handles UMTS channels with a minimum of 78 effective taps. Features include four, summed digital transmitter channels, each of which upconverts and filters signals at sample rates up to 106 Msamples/s. Each channel features a digital resampler, filter channel, digital mixer, and digital oscillator. Power dissipation is 107 mW per channel at 70 MHz when configured for GSM. Available in a 160-ball plastic BGA, price is $34.07 each/10,000. GRAYCHIP, INC., Palo Alto, CA. (650) 323-2955.