Title :
A high dynamic-range, self-tuned Gm-C filter for video-range applications
Author :
Shanjani, P.H. ; Atarodi, M.
Author_Institution :
Dept. of Electr. Eng., Sharif Univ. of Technol., Tehran, Iran
Abstract :
A 10 MHz, sixth-order elliptic filter is realized by maximum dynamic range biquads composed of very low-distortion transconductors. Based on precise simulations, the THD of transconductors is lower than -70 dB at 10 MHz for 3 VPP input voltage. For tuning of this filter, an on-chip frequency tuning system is used and also a new Q tuning method based on compensation of transconductors phase shift by variable output resistance of transconductors. All circuits are aimed to be fabricated on a standard 2 μm CMOS process using a single 5 V supply
Keywords :
CMOS analogue integrated circuits; Q-factor; biquadratic filters; circuit tuning; compensation; elliptic filters; harmonic distortion; radiofrequency filters; 10 MHz; 2 micron; 5 V; CMOS process; Q tuning method; THD; active filter; biquads; high dynamic-range; low-distortion transconductors; onchip frequency tuning system; phase shift compensation; self-tuned Gm-C filter; sixth-order elliptic filter; variable output resistance; video-range applications; Capacitors; Circuit optimization; Dynamic range; Frequency; Linearity; Nonlinear filters; Resistors; Transconductors; Tuning; Voltage;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780851
