Title :
CMOS digitally controlled current follower and its application
Author :
Prasertsom, Danucha ; Tangsrirat, Worapong
Author_Institution :
Fac. of Eng., King Mongkut´´s Inst. of Technol. Ladkrabang (KMITL), Bangkok, Thailand
Abstract :
A realization of the CMOS digitally controlled current follower (DC-CF) suitable for low-voltage high-frequency application is proposed. To achieve very low input resistance, it is realized using a modification of a low-input resistance stage as an input stage. To achieve the precise digital control of the current gain, the current division technique is used. The proposed DC-CF can operate with low voltage supplies of ±1.5 V, and is designed with 0.5-¿m CMOS SCN05H process. As an application, the digitally programmable current-mode universal filter using the proposed DC-CF is given. Simulation results are also included.
Keywords :
CMOS digital integrated circuits; current-mode circuits; digital control; filters; low-power electronics; CMOS SCN05H process; CMOS digitally controlled current follower; current division technique; current gain; digital control; digitally programmable current-mode universal filter; low input resistance; low-voltage high-frequency application; size 0.5 mum; voltage -1.5 V; voltage 1.5 V; Bandwidth; CMOS digital integrated circuits; CMOS process; CMOS technology; Circuit simulation; Current mode circuits; Digital control; Digital filters; Low voltage; SPICE; Current Follower (CF); Current-Mode Circuits; Digitally Programmable;
Conference_Titel :
Integrated Circuits, ISIC '09. Proceedings of the 2009 12th International Symposium on
Conference_Location :
Singapore
Print_ISBN :
978-9-8108-2468-6
