Title :
A direct digital frequency synthesizer based on a new form of polynomial approximations
Author :
Chen, Yao-Hua ; Chau, Yawgeng A.
Author_Institution :
Dept. of Commun. Eng., Yuan-Ze Univ., Chungli, Taiwan
fDate :
5/1/2010 12:00:00 AM
Abstract :
A new form of polynomial approximations of the discrete sinusoid waveform is proposed for the design of a direct digital frequency synthesizer (DDFS). With the polynomial approximation, only square circuits are needed for the DDFS realization, which will tremendously reduce the chip area, and a spurious free dynamic range (SFDR) of more than 95 dBc can be achieved. Based on the approximation, the DDFS circuit is designed and validated via simulations with the TSMC 0.18 μm cell-library.
Keywords :
Circuit simulation; Communication switching; Complexity theory; Dynamic range; Frequency synthesizers; Instruments; OFDM; Phase noise; Polynomials; Read only memory; Frequency Synthesizer, ROM-less, Polynomial Approximation, Spurious Free Dynamic Range (SFDR);
Journal_Title :
Consumer Electronics, IEEE Transactions on
DOI :
10.1109/TCE.2010.5505951
