Name
Title | ||
|---|---|---|
A 2 GHz 130 mW Direct-Digital Frequency Synthesizer With a Nonlinear DAC in 55 nm CMOS |
Abstract | ||
|---|---|---|
This paper presents a direct digital frequency synthesizer (DDFS) based on the nonlinear DAC with a maximum operating frequency of 2 GHz. This work proposes three design methods to enhance the performance of a DDFS. First, a multi-level momentarily activated bias is proposed to reduce power dissipation in the phase accumulator. Second, a coarse phase-based consecutive fine amplitude grouping scheme is presented to reduce hardware complexity and power consumption in the digital decoder. Third, the mixed-wave conversion topology in the nonlinear DAC is proposed to improve the output spectral purity. The DDFS with 9 bit amplitude resolution is capable of producing a minimum spurious-free dynamic range (SFDR) of 55.1 dBc up to Nyquist frequency at the clock frequency of 2 GHz. The prototype DDFS is fabricated in a 55-nm CMOS. It occupies an active area of 0.1 mm 2 with a total power dissipation of 130 mW. The figure of merit of this DDFS is 8944 GHz · 2 (SFDR/6) /W. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/JSSC.2014.2359674 | J. Solid-State Circuits |
Keywords | Field | DocType |
cmos integrated circuits,direct-digital frequency synthesizer,power consumption,power dissipation,nonlinear dac,phase-based consecutive fine amplitude grouping scheme,word length 9 bit,digital-to-analog converter (dac),uhf integrated circuits,size 55 nm,spurious-free dynamic range,frequency 2 ghz,direct digital frequency synthesizer (ddfs),segmented nonlinear dac,frequency synthesizers,power 130 mw,digital decoder,nyquist frequency,phase accumulator,cmos,cmos current mode logic,digital-analogue conversion,mixed-wave conversion topology | Spectral purity,Computer science,Communications system,Electronic engineering,CMOS,Bandwidth (signal processing),Decoding methods,Electronic circuit,Direct digital synthesizer,Electrical engineering,Clock rate | Journal |
Volume | Issue | ISSN |
49 | 12 | 0018-9200 |
Citations | PageRank | References |
2 | 0.46 | 0 |
Authors | ||
7 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Taegeun Yoo | 1 | 2 | 0.46 |
| Hong Chang Yeoh | 2 | 22 | 2.49 |
| Yun-Hwan Jung | 3 | 21 | 2.77 |
| Seong Jin Cho | 4 | 6 | 3.28 |
| Yong Sin Kim | 5 | 19 | 5.45 |
| Sung-Mo Steve Kang | 6 | 1198 | 213.14 |
| Kwang-hyun Baek | 7 | 129 | 26.82 |