Direct digital frequency synthesizers (DDFS) using high-order polynomial approximation were discussed. The read only memory (ROM)-less DDFS used a sine/cosine generator block that interpolates the sine function using an optimized polynomial expression with constant coefficients. Higher spurious-free dynamic range (SFDR) is obtained compared to Taylor expansion. Polynomial coefficients are chosen using non-linear Nelder-Mead simplex optimization to maximize DDFS output SFDR.
Direct Digital Frequency Synthesizers using high-order Polynomial Approximation / Strollo, ANTONIO GIUSEPPE MARIA; Napoli, Ettore; DE CARO, Davide. - STAMPA. - (2002), pp. 134-135. (Intervento presentato al convegno IEEE International Solid-State Circuit Conference tenutosi a San Francisco, USA nel Feb. 4-6) [10.1109/ISSCC.2002.992972].
Direct Digital Frequency Synthesizers using high-order Polynomial Approximation
STROLLO, ANTONIO GIUSEPPE MARIA;NAPOLI, ETTORE;DE CARO, Davide
2002
Abstract
Direct digital frequency synthesizers (DDFS) using high-order polynomial approximation were discussed. The read only memory (ROM)-less DDFS used a sine/cosine generator block that interpolates the sine function using an optimized polynomial expression with constant coefficients. Higher spurious-free dynamic range (SFDR) is obtained compared to Taylor expansion. Polynomial coefficients are chosen using non-linear Nelder-Mead simplex optimization to maximize DDFS output SFDR.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
