SEMICONDUCTOR INTEGRATED CIRCUITS

Digitally controlled oscillator design with a variable capacitance XOR gate

Manoj Kumar, Sandeep K. Arya and Sujata Pandey

+ Author Affiliations

PDF

Abstract: A digitally controlled oscillator (DCO) using a three-transistor XOR gate as the variable load has been presented. A delay cell using an inverter and a three-transistor XOR gate as the variable capacitance is also proposed. Three-, five- and seven-stage DCO circuits have been designed using the proposed delay cell. The output frequency is controlled digitally with bits applied to the delay cells. The three-bit DCO shows output frequency and power consumption variation in the range of 3.2486-4.0267 GHz and 0.6121-0.3901 mW, respectively, with a change in the control word 111-000. The five-bit DCO achieves frequency and power of 1.8553-2.3506 GHz and 1.0202-0.6501 mW, respectively, with a change in the control word 11111-00000. Moreover, the seven-bit DCO shows a frequency and power consumption variation of 1.3239-1.6817 GHz and 1.4282-0.9102 mW, respectively, with a varying control word 1111111-0000000. The power consumption and output frequency of the proposed circuits have been compared with earlier reported circuits and the present approaches show significant improvements.

Key words: digital control oscillator delay cell power consumption variable capacitance voltage controlled oscillators XOR gate

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
  • Search

    Advanced Search >>

    GET CITATION

    shu

    Export: BibTex EndNote

    Article Metrics

    Article views: 3477 Times PDF downloads: 3673 Times Cited by: 0 Times

    History

    Received: 03 December 2014 Revised: 09 June 2011 Online: Published: 01 October 2011

    Catalog

      Email This Article

      User name:
      Email:*请输入正确邮箱
      Code:*验证码错误
      Manoj Kumar, Sandeep K. Arya, Sujata Pandey. Digitally controlled oscillator design with a variable capacitance XOR gate[J]. Journal of Semiconductors, 2011, 32(10): 105001. doi: 10.1088/1674-4926/32/10/105001 M Kumar, S K Arya, S Pandey. Digitally controlled oscillator design with a variable capacitance XOR gate[J]. J. Semicond., 2011, 32(10): 105001. doi:  10.1088/1674-4926/32/10/105001.Export: BibTex EndNote
      Citation:
      Manoj Kumar, Sandeep K. Arya, Sujata Pandey. Digitally controlled oscillator design with a variable capacitance XOR gate[J]. Journal of Semiconductors, 2011, 32(10): 105001. doi: 10.1088/1674-4926/32/10/105001

      M Kumar, S K Arya, S Pandey. Digitally controlled oscillator design with a variable capacitance XOR gate[J]. J. Semicond., 2011, 32(10): 105001. doi:  10.1088/1674-4926/32/10/105001.
      Export: BibTex EndNote

      Digitally controlled oscillator design with a variable capacitance XOR gate

      doi: 10.1088/1674-4926/32/10/105001
      • Received Date: 2014-12-03
      • Accepted Date: 2011-04-14
      • Revised Date: 2011-06-09
      • Published Date: 2011-09-20

      Catalog

        /

        DownLoad:  Full-Size Img  PowerPoint
        Return
        Return