Title :
Low-Voltage digitally controlled fully differential current conveyor
Author :
Mahmoud, Soliman A. ; Hashiesh, Mohammed A. ; Soliman, Ahmed M.
Author_Institution :
Electr. Eng. Dept., Cairo Univ. Fayoum Branch, Egypt
Abstract :
Design and simulation of a digitally controlled CMOS fully differential current conveyor (DCFDCC) is presented. A novel current division network (CDN) is used to provide the digital control of the current gain between terminals X and Z of this DCFDCC. The proposed DCFDCC operates under low supply voltage of ±1.5 V. The realization of the DCFDCC using the new CDN is presented by two approaches. First approach has linearly proportional current gain with the digitally controlled parameter of the CDN, while the second approach exhibits current gain between terminals X and Z greater than, or equal to, one. Applications of the DCFDCC in realizing second order universal active filter and variable gain amplifier are given. PSPICE simulation confirms the performance of the proposed blocks and its applications.
Keywords :
CMOS integrated circuits; SPICE; active filters; buffer circuits; circuit simulation; current conveyors; digital control; integrated circuit design; CDN; DCFDCC; PSPICE simulation; current division network; current gain; digital control; digitally controlled CMOS fully differential current conveyor; digitally controlled parameter; low supply voltage; second order universal active filter; variable gain amplifier; Active filters; Baseband; Circuits; Digital control; Digital filters; Digital signal processing; Frequency; Gain; Nonlinear filters; Proportional control; Current conveyor (CC); current division network (CDN); current gain; fully differential buffer;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2005.852922
