Title :
1-V continuously tunable CMOS bulk-driven transconductor for Gm-C filters
Author :
Carrillo, Juan M. ; Duque-Carrillo, J. Francisco ; Torelli, Guido
Author_Institution :
Dept. of Electron., Univ. of Extremadura, Badajoz
Abstract :
A bulk-driven transconductor including a continuous tuning scheme and operated from a 1-V supply is presented in this paper. The voltage-to-current conversion is carried out by means of the source degeneration of a bulk-driven differential pair, while transconductance tuning is obtained by modifying the gain of a current mirror. The proposed circuit has been included in a continuous-time transconductance-C (Gm-C) biquadratic cell designed for the audio bandwidth, which features a programmability range of more than one decade and a dynamic range of 63.7 dB while consuming less than 45 muW.
Keywords :
CMOS analogue integrated circuits; biquadratic filters; current mirrors; audio bandwidth; bulk-driven differential pair; continuous-time transconductance-C biquadratic cell; current mirror; source degeneration; transconductance tuning; tunable CMOS bulk-driven transconductor; voltage 1 V; voltage-to-current conversion; Circuit optimization; Filters; MOSFETs; Mirrors; Resistors; Signal processing; Transconductance; Transconductors; Tunable circuits and devices; Voltage;
Conference_Titel :
Circuits and Systems, 2008. ISCAS 2008. IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-1683-7
Electronic_ISBN :
978-1-4244-1684-4
DOI :
10.1109/ISCAS.2008.4541563
