SEMICONDUCTOR INTEGRATED CIRCUITS

A high-speed mixed-signal down-scaling circuit for DAB tuners

Tang Lu, Wang Zhigong, Xuan Jiahui, Yang Yang, Xu Jian and Xu Yong

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Abstract: A high-speed mixed-signal down-scaling circuit with low power consumption and low phase noise for use in digital audio broadcasting tuners has been realized and characterized. Some new circuit techniques are adopted to improve its performance. A dual-modulus prescaler (DMP) with low phase noise is realized with a kind of improved source-coupled logic (SCL) D-flip-flop (DFF) in the synchronous divider and a kind of improved complementary metal oxide semiconductor master-slave (CMOS MS)-DFF in the asynchronous divider. A new more accurate wire-load model is used to realize the pulse-swallow counter (PS counter). Fabricated in a 0.18-μm CMOS process, the total chip size is 0.6 × 0.2 mm2. The DMP in the proposed down-scaling circuit exhibits a low phase noise of --118.2 dBc/Hz at 10 kHz off the carrier frequency. At a supply voltage of 1.8 V, the power consumption of the down-scaling circuit's core part is only 2.7 mW.

Key words: PLL

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    Received: 20 August 2015 Revised: 19 January 2012 Online: Published: 01 July 2012

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      Tang Lu, Wang Zhigong, Xuan Jiahui, Yang Yang, Xu Jian, Xu Yong. A high-speed mixed-signal down-scaling circuit for DAB tuners[J]. Journal of Semiconductors, 2012, 33(7): 075008. doi: 10.1088/1674-4926/33/7/075008 Tang L, Wang Z G, Xuan J H, Yang Y, Xu J, Xu Y. A high-speed mixed-signal down-scaling circuit for DAB tuners[J]. J. Semicond., 2012, 33(7): 075008. doi: 10.1088/1674-4926/33/7/075008.Export: BibTex EndNote
      Citation:
      Tang Lu, Wang Zhigong, Xuan Jiahui, Yang Yang, Xu Jian, Xu Yong. A high-speed mixed-signal down-scaling circuit for DAB tuners[J]. Journal of Semiconductors, 2012, 33(7): 075008. doi: 10.1088/1674-4926/33/7/075008

      Tang L, Wang Z G, Xuan J H, Yang Y, Xu J, Xu Y. A high-speed mixed-signal down-scaling circuit for DAB tuners[J]. J. Semicond., 2012, 33(7): 075008. doi: 10.1088/1674-4926/33/7/075008.
      Export: BibTex EndNote

      A high-speed mixed-signal down-scaling circuit for DAB tuners

      doi: 10.1088/1674-4926/33/7/075008
      Funds:

      The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

      • Received Date: 2015-08-20
      • Accepted Date: 2012-01-06
      • Revised Date: 2012-01-19
      • Published Date: 2012-06-27

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