Title :
Digitally controlled oscillator with storage based randomization for spurs reduction
Author :
Pao-Lung Chen ; Ting-Yao Chen
Author_Institution :
Nat. Kaohsiung First Univ. of Sci. & Technol., Kaohsiung, Taiwan
Abstract :
This paper presents a storage based randomization method for spurs reduction in digitally controlled oscillator (DCO). The storage size is very compact as compared with conventional large size. A modified linear feedback shift register is applied for random address generator. The proposed method has been demonstrated in field programmable gate array (FPGA) with a digitally controlled oscillator. The spurious-free dynamic range (SFDR) of proposed method is 32.3 dB as compared with conventional method´s 28.9 dB. The proposed method has successfully reduced the spurs with very small storage for randomization.
Keywords :
digital control; field programmable gate arrays; oscillators; shift registers; FPGA; digitally controlled oscillator; field programmable gate array; modified linear feedback shift register; random address generator; spurious-free dynamic range; spurs reduction; storage based randomization; Field programmable gate arrays; Frequency synthesizers; Generators; Linear feedback shift registers; Logic gates; Oscillators; Phase locked loops;
Conference_Titel :
Consumer Electronics - Taiwan (ICCE-TW), 2015 IEEE International Conference on
Conference_Location :
Taipei
DOI :
10.1109/ICCE-TW.2015.7216993