Title :
Floating-gate-based tunable CMOS low-voltage linear transconductor and its application to HF gm-C filter design
Author :
Muñoz, F. ; Torralba, A. ; Carvajal, R.G. ; Tombs, J. ; Ramírez-Angulo, J.
Author_Institution :
Dept. de Electron. Eng., Seville Univ., Spain
fDate :
1/1/2001 12:00:00 AM
Abstract :
This paper presents a new CMOS low-voltage linear transconductor for very high frequency. It uses multiple-input floating-gate transistors in each inverter of the differential structure transconductor presented by Nauta [1992]. The proposed transconductor operates under a constant low-voltage supply as low as 1.2 V, and its transconductance and output resistance are independently tunable, as shown by experimental measurements. This architecture is suitable for use in high-frequency continuous-time filters with programmable center frequency and quality factor. Simulation results of a 10.7-MHz and Q=40 gm-C filter operating with a voltage supply of 1.4 V and with rail-to rail input swing are presented
Keywords :
CMOS analogue integrated circuits; Q-factor; continuous time filters; low-power electronics; programmable filters; radiofrequency filters; 1.2 to 1.4 V; 10.7 MHz; HF gm-C filter design; constant low-voltage supply; differential structure transconductor; floating-gate-based tunable CMOS; high-frequency continuous-time filters; low-voltage linear transconductor; multiple-input floating-gate transistors; output resistance; programmable center frequency; quality factor; rail-to rail input swing; transconductance; Bandwidth; Filters; Frequency; Hafnium; Inverters; Rail to rail inputs; Signal processing; Threshold voltage; Transconductance; Transconductors;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
