A low-power switched-current CDMA matched filter with on-chip V-I and I-V converters

A low-power and compact CDMA matched filter has been developed using the switched-current technology. On-chip V-I and I-V converters featuring moderate linear characteristics have been developed for the chip. The low-power operation has been achieved by the sub-block architecture and the reduced current flowing in current-memory cells. A low-power clock-on-demand shift-register has also been developed. The 256-chip matched filter fabricated in a 0.35-/spl mu/m technology demonstrated 1.95 mW operation at 8Mchip/s with 2 V power supply, occupying 0.54 mm/sup 2/.