Continuous-Time Filter Design Optimized for Reduced Die Area

C. Myers, B. Greenley, D. Thomas, U. Moon
2004 IEEE transactions on circuits and systems - 2, Analog and digital signal processing  
A method for distributing capacitor and resistor area to optimally reduce die area in a given continuous-time filter design while maintaining the filter's designed signal-to-noise ratio (SNR), frequency response, and topology is discussed. To do this, a basic linear programming algorithm is developed from derived circuit cost and constraint functions. Among the three major filter types of fifth-order under comparison, maximum combined capacitor and resistor die area savings of 21% results for
more » ... e Butterworth filter. An alternative approach where the SNR is optimized for a given die area is also presented. Maximum improvement of the fifth-order Butterworth filter for this approach is 1.2 dB. Index Terms-Constraint and cost functions, continous-time filter, linear programming, maximize SNR, minimize die area, optimization.
doi:10.1109/tcsii.2003.822425 fatcat:b6fkyrbcbrhzpft2rnhgeal3gu