A precise compensated bandgap reference without resistors

A low voltage MOSFET-only voltage reference using body effect and subthreshold operation is proposed in this paper', A temperature coefficient of5 ppm/ 'Cfrom -55 'C to 90 'C is achieved as the combined effects of: 1) a suppression of the temperature dependence of mobility; 2) a piecewise compensation of the temperature dependence of subthreshold slope parameter during the second half of temperature range. The voltage reference is designed in SMIC 0.13um CMOS process. It is able to operate at power supply voltage down to 760mV and consumes a supply current ofless than 1pA at 90 'C.

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A 760mV CMOS voltage reference with mobility and subthreshold slope compensation

Xia

Sun

et al. 2009

2009 IEEE 8th International Conference on ASIC

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A new temperature-compensated CMOS bandgap reference circuit for portable applications

Chen

Huang

Chang

2006 IEEE International Symposium on Circuits and Systems

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An offset compensation technique for bandgap voltage reference in CMOS technology

Ruzza

Dallago

Venchi

et al. 2008

2008 IEEE International Symposium on Circuits and Systems (ISCAS)

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Abstract-A precision integrated bandgap voltage reference in 0.35μm CMOS technology is here presented. The circuit uses natural npn bipolar transistors as reference diodes. A particular attention was paid to the compensation of the several offsets that could strongly influence the performances of the reference. A very simple sample and hold technique for offset compensation is here presented. The proposed technique is straight forward for all bandgap topologies which use diodes with a terminal connected to the ground node or to the supply node.The temperature coefficient (TC) of the generated output voltage is 12.7ppm/°C versus about 245ppm/°C of the same circuit without offset compensation.A full description and an analytical expression for the proposed compensation technique are given. The results of the most relevant simulations are also reported. The circuit has been inserted in a test chip whose layout is shown.

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A precise compensated bandgap reference without resistors

Cited by 3 publications

References 7 publications

A 760mV CMOS voltage reference with mobility and subthreshold slope compensation

A 760mV CMOS voltage reference with mobility and subthreshold slope compensation

A new temperature-compensated CMOS bandgap reference circuit for portable applications

An offset compensation technique for bandgap voltage reference in CMOS technology

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