Current mode /spl radic/X-domain Palmo technique cell for programmable analog VLSI

Abstract

Palmo techniques use pulse width modulated digital signals to convey analog signal information between programmable analog cells. A cell based on CMOS current mode comparator and square root domain integrator circuits is presented. This new implementation of the Palmo cell may be operated in continuous time or sampled data modes to perform a variety of signal processing tasks. Circuits operate at 3V, with sampling rates of up to 5 MHz for sampled data circuits and cut-off frequencies up to 16MHz for continuous time third order low pass filter circuits.