Title :
Low voltage high current gain CMOS digitally controlled fully differential CCII [variable gain amplifier application example]
Author :
Mahmoud, Soliman A.
Author_Institution :
Electr. Eng. Dept., Cairo Univ., Fayoum, Egypt
Abstract :
This paper presents a digitally controlled CMOS fully differential second generation current conveyor (DCFDCCII) with a current gain between terminals X and Z where this current gain is greater than, or equal to, one. The current gain approach depends on using a current division network (CDN) in the feedback of a fully differential buffer (FDB). The presented DCFDCCII operates under a low supply voltage of ±1.5 V. Application of the DCFDCCII in realizing a variable gain amplifier is also presented, with the advantage of digitally tuned gain without any change of the circuit components.
Keywords :
CMOS integrated circuits; buffer circuits; circuit feedback; current conveyors; differential amplifiers; digital control; gain control; low-power electronics; 1.5 V; 3 V; CDN; DCFDCCII; current division network; digitally controlled current gain; digitally controlled fully differential CCII; digitally tuned gain; fully differential buffer feedback; high current gain CCII; low voltage CMOS CCII; variable gain amplifier; Clocks; Digital control; Feedback; Frequency; Gain; Integrated circuit interconnections; Low voltage; Mirrors; Tuned circuits; Voltage control;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1464759
