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A curvature calibrated bandgap reference with base–emitter current compensating in a 0.13 μm CMOS process

Ma Zhuo, Tan Xiaoqiang, Xie Lunguo and Guo Yang

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Abstract: In bandgap references, the effect caused by the input offset of the operational amplifier can be effectively reduced by the utilization of cascade bipolar junction transistors (BJTs). But in modern CMOS logic processes, due to the small value of β , the base--emitter path of BJTs has a significant streaming effect on the collector current, which leads to a large temperature drift for the reference voltage. To solve this problem, a baseemitter current compensation technique is proposed in a cascade BJT bandgap reference structure to calibrate the curvature of the output voltage to temperature. Experimental results based on the 0.13 μm logic CMOS process show that the reference voltage is 1.238 V and the temperature coefficient is 6.2 ppm/℃ within the range of -40 to 125 ℃.

Key words: bandgap reference, CMOS, BJT, base current compensating

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    Received: 18 August 2015 Revised: 24 June 2010 Online: Published: 01 November 2010

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      Ma Zhuo, Tan Xiaoqiang, Xie Lunguo, Guo Yang. A curvature calibrated bandgap reference with base–emitter current compensating in a 0.13 μm CMOS process[J]. Journal of Semiconductors, 2010, 31(11): 115004. doi: 10.1088/1674-4926/31/11/115004 Ma Z, Tan X Q, Xie L G, Guo Y. A curvature calibrated bandgap reference with base–emitter current compensating in a 0.13 μm CMOS process[J]. J. Semicond., 2010, 31(11): 115004. doi:  10.1088/1674-4926/31/11/115004.Export: BibTex EndNote
      Citation:
      Ma Zhuo, Tan Xiaoqiang, Xie Lunguo, Guo Yang. A curvature calibrated bandgap reference with base–emitter current compensating in a 0.13 μm CMOS process[J]. Journal of Semiconductors, 2010, 31(11): 115004. doi: 10.1088/1674-4926/31/11/115004

      Ma Z, Tan X Q, Xie L G, Guo Y. A curvature calibrated bandgap reference with base–emitter current compensating in a 0.13 μm CMOS process[J]. J. Semicond., 2010, 31(11): 115004. doi:  10.1088/1674-4926/31/11/115004.
      Export: BibTex EndNote

      A curvature calibrated bandgap reference with base–emitter current compensating in a 0.13 μm CMOS process

      doi: 10.1088/1674-4926/31/11/115004
      • Received Date: 2015-08-18
      • Accepted Date: 2010-03-21
      • Revised Date: 2010-06-24
      • Published Date: 2010-10-31

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