Title :
An operating point elimination technique for weak-inversion log-domain filters with multiple operating points
Author :
Georgiou, J. ; Toumazou, Christofer
Author_Institution :
Dept. of Electr. & Electron. Eng., Imperial Coll. of Sci., Technol. & Med., London, UK
Abstract :
When converting conventional BJT-based log domain filters to the CMOS equivalent, operated in the weak inversion region, it has been shown that there can be unwanted DC operating points. This paper presents a simple technique for eliminating such operating points once they have been identified. An example of the elimination of unwanted states is presented, and this technique is verified both by simulation and also by the measurement of a solid-state version of the corrected filter
Keywords :
CMOS analogue integrated circuits; active filters; circuit stability; linear network synthesis; BJT-based filters; CMOS equivalent; DC operating points; multiple operating points; operating point elimination technique; weak-inversion log-domain filters; Band pass filters; Capacitors; Educational institutions; Filtering theory; MATLAB; Monitoring; Nonlinear filters; Solid modeling; Solid state circuits; Voltage;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921811
