TY - GEN
T1 - On accurate piecewise linear ROM-less direct digital frequency synthesizers
AU - Wu, Pao Szu
AU - Beiu, Valeriu
PY - 2003
Y1 - 2003
N2 - This paper deals with approximation circuits for sine waves, with applications to low-power direct digital frequency synthesizers (DDFSs). The goal is to determine very accurate approximations, i.e. having very low Maximum Absolute Errors (MAE). These allow for eliminating the ROM and reducing power. They rely on simple circuitry. The paper starts by presenting previous approximation techniques focusing on ROM-less piecewise linear ones. These will be followed by several new ROM-less piecewise linear approximations, and by a very thorough comparison of the newly introduced ones with respect to those presented in the literature. The solutions presented in this paper significantly reduce the MAE with a very modest increase in circuitry (one more multiplexer), and/or 1-2 bits of extra precision.
AB - This paper deals with approximation circuits for sine waves, with applications to low-power direct digital frequency synthesizers (DDFSs). The goal is to determine very accurate approximations, i.e. having very low Maximum Absolute Errors (MAE). These allow for eliminating the ROM and reducing power. They rely on simple circuitry. The paper starts by presenting previous approximation techniques focusing on ROM-less piecewise linear ones. These will be followed by several new ROM-less piecewise linear approximations, and by a very thorough comparison of the newly introduced ones with respect to those presented in the literature. The solutions presented in this paper significantly reduce the MAE with a very modest increase in circuitry (one more multiplexer), and/or 1-2 bits of extra precision.
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U2 - 10.1109/ICNNSP.2003.1281185
DO - 10.1109/ICNNSP.2003.1281185
M3 - Conference contribution
AN - SCOPUS:12744270054
SN - 0780377028
SN - 9780780377028
T3 - Proceedings of 2003 International Conference on Neural Networks and Signal Processing, ICNNSP'03
SP - 1595
EP - 1599
BT - Proceedings of 2003 International Conference on Neural Networks and Signal Processing, ICNNSP'03
T2 - 2003 International Conference on Neural Networks and Signal Processing, ICNNSP'03
Y2 - 14 December 2003 through 17 December 2003
ER -