A CMOS Rail-to-Rail Current Conveyer and Its Applications to Current-Mode Filters


IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E86-A   No.6   pp.1445-1450
Publication Date: 2003/06/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Papers Selected from 2002 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2002))
CCII,  rail-to-rail,  class AB,  current-mode filter,  

Full Text: PDF>>
Buy this Article

A second-generation CMOS current conveyor (CCII) consisting of a rail-to-rail complementary N- and P-channel differential input stage for the voltage input, a class AB push-pull stage for the current input, and current mirrors for the current outputs is developed. The CCII was implemented using a double-poly triple-metal 0.6 µm n-well CMOS process, to confirm its operation experimentally. A prototype chip achieves a rail-to-rail swing 2.4 V under 2.5 V power supplies and shows the exact voltage and current following performances up to 100 MHz. These performances make the CCII proposed herein quite useful for a building block of current-mode circuits. The prototype CCII is applied to current-mode filters to demonstrate the wideband signal processing capabilities.