Title :
High-gain common-mode feedback circuits for differential log-domain filters
Author :
Fox, R.M. ; Ko, H.J. ; Eisenstadt, William R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Florida Univ., Gainesville, FL, USA
Abstract :
A new class of differential log-domain filters based on common-mode feedback (CMFB) is demonstrated. Simple but practical circuits are presented that provide large CMFB loop gain. The added CMFB enhances common-mode and power-supply rejection and allows closed-form expressions for currents, greatly simplifying design. One of the new circuits presented is shown to allow greatly increased undistorted signal swings
Keywords :
CMOS analogue integrated circuits; active filters; circuit feedback; integrating circuits; nonlinear network synthesis; CMFB loop gain; common-mode feedback circuits; common-mode rejection; differential log-domain filters; high-gain feedback circuits; log domain integrator design; power-supply rejection; Closed-form solution; Differential equations; Electronic mail; Feedback circuits; Filters; Power engineering and energy; Power engineering computing; Tunable circuits and devices; Virtual colonoscopy; 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.2001.921917
