2Leary P,Malobertj F. A direct digital synthesizer with improved spectral performance[J]. IEEETransactions on Communica- tions, 2009,39 (7): 1046-1048.
3SHU Yun-shan, SONG B S. A 15-bit linear 20-MS/s pipelined ADC digitally calibrated with signaldependent dithering [J]. IEEE Journal of Solid-state Circuits,2008,43 (2):342-350.
4Joukov. A direct digital synthesizer with a tunable error feedback structure[J]. IEEE Transactionson Communications, 2007,45 (4):274-278.