SODS - A NEW CMOS DIFFERENTIAL-TYPE STRUCTURE

Differential-type structures to implement Boolean functions find very interesting applications in self-timed circuits, A novel structure of CMOS differential circuit called Switched Output Differential Structur e (SODS) is presented in this paper, This structure has been designed modifying the LOAD circuitry of previously reported differential struc tures, gaining in terms of transistor-count and area, This cell has be en implemented on a standard 1.5 mu m technology and has served to ass ess the structures and compare it with previously reported differentia l structures. Experimental laboratory results, as well as electrical s imulation, show improved timing and power performance, i.e., 470 MHz a nd 0.46 mW at 50 MHz, respectively, far the buffer-inverter operation, with Vdd = 5 V.