Design and implementation of a micro-power CMOS voltage reference circuit based on thermal compensation of Vgs. Issue 1 (January 2015)

• Record Type: Journal Article
• Authors: Chouhan, Shailesh Singh; Halonen, Kari
• Is Part Of: Microelectronics journal. Volume 46:Issue 1(2015)
• Page Start: 36
• Page End: 42
• Publication Date: 2015-01
• Subjects: Microelectronics -- Periodicals; Microélectronique -- Périodiques; Microelectronics; Electronic journals; Journals - contents and abstracts; Periodicals; 621.3805
• DOI: 10.1016/j.mejo.2014.09.015
• Languages: English
• ISSNs: 0959-8324

Abstract

<abstract abstract-type="author" id="ab0005"> <title id="sect0005">Abstract</title> <sec> <p id="sp0060">In this work a simple all MOS voltage reference circuit has been proposed. To obtain reference output voltage, the thermal compensation has been generated by using a series composite NMOSTs. The voltage reference circuit has been fabricated in a standard 0.18 μm CMOS technology. The proposed circuit is capable of working for the supply voltage ranging from 1.25 V to 2 V. The maximum power dissipation of the proposed circuit is 0.48 μW at the supply voltage of 2 V. The measurement has been performed over a set of 10 samples. It resulted in the mean temperature coefficient (TC) of 19.302 ppm/°C for the temperature range of −40 °C to 85 °C. The measured mean line sensitivity is 2.217 mV/V for the supply voltage ranging from 1.25 V to 2 V at the room temperature. The measured mean power supply rejection ratio at 10 Hz and 1 MHz is −55.31 dB and −16.67 dB respectively for the supply voltage of 1.8 V. Moreover, the measured mean noise density without any filtering capacitor at 100 Hz and 100 kHz are <inline-formula><alternatives><inline-graphic xlink:href="ark:/27927/pgh30rpc3sz" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="si0004.gif" overflow="scroll" id="d13e605" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mn>12.39</mml:mn><mml:mspace width="0.25em" /><mml:mi mathvariant="normal">μ</mml:mi><mml:mi mathvariant="normal">V</mml:mi><mml:mo>/</mml:mo><mml:msqrt><mml:mrow><mml:mi>Hz</mml:mi></mml:mrow></mml:msqrt></mml:math></alternatives></inline-formula> and <inline-formula><alternatives><inline-graphic xlink:href="ark:/27927/pgh30rpcmp2" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="si0005.gif" overflow="scroll" id="d13e620" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mn>0.39</mml:mn><mml:mspace width="0.25em" /><mml:mi mathvariant="normal">μ</mml:mi><mml:mi mathvariant="normal">V</mml:mi><mml:mo>/</mml:mo><mml:msqrt><mml:mrow><mml:mi>Hz</mml:mi></mml:mrow></mml:msqrt></mml:math></alternatives></inline-formula> respectively. Due to its simple circuit implementation, the active area of the circuit is 0.0077 mm<sup>2</sup>.</p> </sec> </abstract>