Title :
Digitally controlled balanced output transconductor: CMOS realization and applications
Author :
Mahmoud, Soliman A. ; Awad, Inas A.
Author_Institution :
Dept. of Electron. & Commun. Eng., Cairo Univ., Fayoum, Egypt
Abstract :
A digitally controlled balanced output transconductor (DCBOTA) is proposed and analyzed. The proposed DCBOTA is based on the BOTA given and MOS switches. The DCBOTA transconductance is tunable in a range of 2n-1 times using n bits control word. A wide band digitally controlled variable gain amplifier (DCVGA) and a six order lowpass filter based on the DCBOTA are presented. The proposed filter has the advantage of independent control of gain and cutoff frequency. Simulations results are included to verify the analysis.
Keywords :
CMOS digital integrated circuits; SPICE; differential amplifiers; digital control; field effect transistor switches; gain control; low-pass filters; programmable filters; wideband amplifiers; CMOS realization; MOS switches; cutoff frequency; digitally controlled balanced output transconductor; gain control; n bits control word; six order lowpass filter; transconductance; wide band digitally controlled variable gain amplifier; Active filters; Circuits; Communication system control; Digital control; Gain; Switches; Transconductance; Transconductors; Virtual colonoscopy; Voltage control;
Conference_Titel :
Microelectronics, 2003. ICM 2003. Proceedings of the 15th International Conference on
Print_ISBN :
977-05-2010-1
DOI :
10.1109/ICM.2003.1287773
