Title :
Compact low voltage VHF continuous-time current mode FLF filters based on first order low-pass building blocks
Author :
Kalyani-Garimella, Lalitha M. ; Garimella, Annajirao ; Ramírez-Angulo, Jaime ; Escobedo, Laura
Author_Institution :
Klipsch Sch. of Electr. & Comput. Eng., New Mexico State Univ., Las Cruces, NM
Abstract :
A new approach for the implementation of VHF biquadratic continuous time current mode filters with continuously programmable characteristics is introduced. It is based on unity gain first order low-pass building blocks replacing integrators used in conventional state variable filter structures. The implementation is based exclusively on utilization of simple current mirrors. This approach allows implementation of filters with very high f0Q products close to technology limits. Novel gain programmable current mirrors are used in order to provide programmability to the filters characteristics. Simulations in 0.5 mum CMOS technology show feasibility to operate at frequencies over 30 MHz with Q and f0 adjustable values
Keywords :
CMOS analogue integrated circuits; VHF filters; biquadratic filters; continuous time filters; current mirrors; current-mode circuits; 0.5 micron; CMOS technology; FLF filter; VHF filter; analog integrated circuits; biquadratic filters; compact low voltage; continuous-time filter; current mode filter; first order building block; floating gate; low-pass building block; programmable current mirror; simple current mirror; state variable filter structure; CMOS technology; Circuit simulation; Frequency; Hardware; Impedance; Integrated circuit technology; Low voltage; Mirrors; Resonator filters; Transfer functions;
Conference_Titel :
Circuits and Systems, 2005. 48th Midwest Symposium on
Conference_Location :
Covington, KY
Print_ISBN :
0-7803-9197-7
DOI :
10.1109/MWSCAS.2005.1594433
