A 1-V low power rail-to-rail analog CMOS multi-function filter with configurable capability

In this paper, a multiple function filter with configurable capability for 1-V supply voltage is proposed. The circuit can find a rank order among a set of input voltages by setting different binary signals. Moreover without modifying the circuit, the WTA/k-WTA, maximum, minimum and medium function can be easily configured. The circuit has been designed using 0.5 /spl mu/m 2P2M CMOS technology. Seven input voltages are used to verify the performance of the circuit. The results of HSPICE simulation show that the operating speed of the circuit is 2 /spl mu/s for each rank-order operation, that the input dynamic range is rail-to-rail, and that the resolution is 10 mV for 1 V supply voltage. The static power dissipation of the circuit is 11 /spl mu/W.