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A noise shaped flash time to digital converter for all digital frequency synthesizers

Ensafdaran, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/ECCTD.2009.5275130
  3. Abstract:
  4. Reduction of Time to Digital Converter (TDC) quantization related phase noise is one of the most important challenges in all digital frequency synthesizer design. In this paper, a new structure is proposed to shape the quantization noise of flash TDCs. To verify effectiveness of the proposed general noise shaping technique, it is employed on a single delay chain flash TDC. To compensate the process variation effects on the implemented circuits, a calibration technique is also proposed. The design is implemented in 0.18μm CMOS technology. Simulations show effective noise shaping of output quantization noise
  5. Keywords:
  6. All digital ; Calibration techniques ; CMOS technology ; Delay chains ; New structures ; Noise-shaping ; Process variation ; Quantization noise ; Time to digital converters ; CMOS integrated circuits ; Design ; Digital to analog conversion ; Frequency converters ; Frequency synthesizers ; Circuit theory
  7. Source: ECCTD 2009 - European Conference on Circuit Theory and Design Conference Program, 23 August 2009 through 27 August 2009 ; 2009 , Pages 898-901 ; 9781424438969 (ISBN)
  8. URL: http://ieeexplore.ieee.org/document/5275130