Abstract
In this paper fully differential digitally controlled analog library cells are given. The proposed cells are based on a novel digitally controlled current follower (DCCF) circuit. The proposed circuits are useful for low voltage low power high frequency applications. The DCCF operates from a 3 V supply in class AB mode and provides a bandwidth of 80 MHz in 1.2 /spl mu/m CMOS technology. Owing to the class AB operation of the DCCF circuit the standby current is below 94 /spl mu/A. The proposed circuit is used to realize digitally controlled weighted sum transconductors and MOSFET-C filters. APLAC simulations based on the AMI 1.2 /spl mu/m n-well level 3 parameters are in agreement with the presented work.
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