A novel sub-1V bandgap reference with offset compensated techniques

Zhang, Yunwu; Zhu, Jun‐Jie; Sun, Weifeng; Sun, Guodong; Lu, Shengli

doi:10.1007/s10470-013-0178-8

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…Recent applications such as image sensors using LDO regulators require an accutare voltage refrence with very large PSRR value not only in the low frequencies but also in the high frequencies. To achieve this performance, various works has been proposed [14][15][16][17][18], but the performances of these works are limited in terms of PSRR, especially in the high frequencies.…”

Section: Introductionmentioning

confidence: 99%

A sub-1V high PSRR OpAmp based β-multiplier CMOS bandgap voltage reference with resistive division

Slamti¹,

Mehdaoui²,

Chenouni³

et al. 2019

IJEECS

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<span lang="EN-US">A sub-1V opamp based β-multiplier CMOS bandgap voltage reference (BGVR) with high power supply rejection ratio (PSRR) and low temperature coefficient (TC) is proposed in this paper. A current mode regulator scheme is inserted to isolate the supply voltage of the operational amplifier (opamp) and the supply voltage of the BGVR core from the supply voltage source in order to reduce ripple sensitivity and to achieve a high PSRR. The proposed circuit is designed and simulated in 0.18-μm standard CMOS technology. The proposed voltage reference delivers an output voltage of 634.6mV at 27°C. Tthe measurement temperature coefficient is 22,3ppm/°C over temperature range -40°C to 140°C, power supply rejection ratio is -93dB at 10kHz and -71dB at 1MHz and a line regulation of 104μV/V is achieved over supply voltage range 1.2V to 1.8V. The layout area of the proposed circuit is 0.0337mm<sup>2</sup>. The proposed sub-1V bandgap voltage reference can be used as an internal voltage reference in low power LDO regulators and switching regulators.</span>

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Section: Introductionmentioning

confidence: 99%

A sub-1V high PSRR OpAmp based β-multiplier CMOS bandgap voltage reference with resistive division

Slamti¹,

Mehdaoui²,

Chenouni³

et al. 2019

IJEECS

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A Sub-1-V CMOS Voltage Reference with High PSRR and High Accuracy

Thakur

Pandey

Kumar

2022

J CIRCUIT SYST COMP

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This paper presents a novel sub-1-V CMOS voltage reference with high power supply rejection ratio (PSRR), low line sensitivity, and low supply voltage. CMOS voltage references available in the literature use a self-biased cascode branch consisting of two MOS transistors operating in the subthreshold region to generate the proportional-to-absolute-temperature (PTAT) voltage only, whereas extra circuitry is required to generate the complementary-to-absolute-temperature (CTAT) voltage for temperature compensation. But in the proposed sub-1-V CMOS voltage reference, both the PTAT and CTAT voltages are generated using a single self-biased cascode branch. Two operational amplifiers in negative feedback topology are used to convert the PTAT and CTAT voltages into PTAT and CTAT currents, respectively, which help to enhance the stability and PSRR of the proposed voltage reference. The proposed voltage reference has been designed and simulated in 180-nm standard CMOS technology using Cadence Virtuoso Analog Design Environment. The proposed voltage reference achieves an output reference voltage of 424.85[Formula: see text]mV with a temperature coefficient of 29.5[Formula: see text]ppm/∘C for the temperatures ranging from [Formula: see text]C to 125∘C at a supply voltage of 0.8[Formula: see text]V. A line sensitivity of 0.0035%/V is achieved for the supply voltage varying from 0.8[Formula: see text]V to 5[Formula: see text]V at nominal temperature (27∘C). A PSRR of [Formula: see text]91.69[Formula: see text]dB is observed for the frequencies ranging from 1[Formula: see text]Hz to 10[Formula: see text]kHz at nominal conditions without using any capacitive filter. Also, the output noises of the proposed design at nominal conditions for the frequencies of 1[Formula: see text]Hz and 10[Formula: see text]kHz are obtained as 2.37[Formula: see text][Formula: see text]V/[Formula: see text]Hz and 45.26[Formula: see text]nV/[Formula: see text]Hz, respectively.

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A novel sub-1V bandgap reference with offset compensated techniques

Cited by 2 publications

References 9 publications

A sub-1V high PSRR OpAmp based β-multiplier CMOS bandgap voltage reference with resistive division

A sub-1V high PSRR OpAmp based β-multiplier CMOS bandgap voltage reference with resistive division

A Sub-1-V CMOS Voltage Reference with High PSRR and High Accuracy

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