A2.1-ppm/°C current-mode CMOS bandgap reference with piecewise curvature compensation

Wang, Ruocheng; Lu, Wengao; Niu, Yuze; Liu, Zhaokai; Zhao, Meng; Zhang, Yacong; Chen, Zhongjian

doi:10.1109/iscas.2017.8050288

Cited by 12 publications

(5 citation statements)

References 6 publications

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“…A new principle of the second−order compensation is shown in Figure 2; the curve of the first-order output voltage (Vref ) versus temperature is an open-down curve which means that the temperature coefficient has a positive value at low temperatures [15,16] and a To obtain a lower TC, the nonlinear term of Equation (1) must be compensated. A new principle of the second-order compensation is shown in Figure 2; the curve of the first-order output voltage (Vre f ) versus temperature is an open-down curve which means that the temperature coefficient has a positive value at low temperatures [15,16] and a negative value at high temperatures. The voltage V CT is then used to compensate for the high temperature region of the Vre f .…”

Section: Proposed Designmentioning

confidence: 99%

A 3.95 ppm/°C 7.5 μW Second-Order Curvature Compensated Bandgap Reference in 0.11 μm CMOS

Guo-shun

Lei

et al. 2022

Electronics

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In order to meet the requirements of modern portable electronics for high accuracy and low power consumption of bandgap reference circuits, a new low-voltage bandgap reference with a second-order compensated circuit at 1.8 V is proposed. It features a new self-biased fully symmetric differential operational amplifier circuit with the help of split transistors for achieving low power consumption and high accuracy; by adding a new sub-threshold compensated circuit. The results of simulation show that the temperature coefficient of the second-order circuit is 3.95 ppm/°C in the temperature range of −40 to 125 °C, and the power consumption is only 7.5 μW; this meets both the requirements of high precision and low power consumption. At the same time, the output noise voltage of the design is less than 30 μV/sqrt (Hz) at a frequency of 100 Hz, and the low-frequency supply voltage rejection ratio is −103 dB@100 Hz; these are acceptable for bandgap reference circuits.

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Section: Proposed Designmentioning

confidence: 99%

A 3.95 ppm/°C 7.5 μW Second-Order Curvature Compensated Bandgap Reference in 0.11 μm CMOS

Guo-shun

Lei

et al. 2022

Electronics

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“…Figure 1 illustrates the sub-1 V bandgap core diagram [4] . OP1 and OP2 act as two amplifiers respectively, using their imaginary short characteristics to form two cuttents with opposite temperature coefficient I PT and I NT , as shown in Equation ( 1) and Equation ( 2).…”

Section: Sub-1 V Bandgap Referencementioning

confidence: 99%

A New Piecewise-Compensated Bandgap Reference Circuit with a Trimming Procedure

Wei

Duan

2023

J. Phys.: Conf. Ser.

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A new CMOS bandgap reference (BGR) circuit with a piecewise-compensation circuit and a trimming network is proposed and designed to obtain a bandgap reference voltage with a low-temperature coefficient and a high precision, taking into account the effect of non-ideal factors on the results. The proposed piecewise compensation circuit is designed to achieve a constant reference voltage by using a current mirror to mirror the current, combined with a subtractive circuit and an additive circuit to obtain a low-temperature coefficient over an extensive temperature range. The trim network part is used to change the voltage value of the output reference by controlling the magnitude of the resistance value of the resistors connected to the circuit. The design and simulation of the proposed bandgap reference circuit are obtained by using Cadence Spectre simulation by SMIC 0.18 μm CMOS technology. The results indicates that when the power is 3.3 V and the temperature scope is within -40 °C to 125 °C, the output voltage is 1.2 V with the temperature coefficient equal to 0.658 ppm/°C. When the power varies within 3.2 V to 3.4 V, the linear regulating rate is 0.001019 %/V.

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“…Therefore, in recent years, more and more scholars are devoted to research high-performance bandgap [3,4,5,6], including low power consumption, low temperature coefficient, high power rejection, and very small area. To achieve low-temperature coefficient, researchers have proposed different compensation techniques, including piecewise compensation [7,8,9,10,11,12,13,14], highorder curvature compensation [15,16,17,18], and exponential temperature compensation [19,20]. To obtain high power supply rejection, researchers usually introduce multi-stage folded cascode operational amplifiers, add capacitors, or RC low-pass filter circuits in the bandgap [21,22,23,24].…”

Section: Introductionmentioning

confidence: 99%

A low temperature coefficient wide temperature range bandgap reference with high power supply rejection

2023

IEICE Electron. Express

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This paper presents a low temperature coefficient and wide temperature range bandgap reference with high power supply rejection. High temperature curvature compensation of this circuit is accomplished by MOSFET transistors operating in the subthreshold region. With the proposed piecewise compensation technique, the temperature range is extended. At the same time, a pre-regulator structure is adopted to improve the line sensitivity and suppress the ripple of the power supply. The novel bandgap reference is proposed and verified in 180nm CMOS process. The measured 𝑉 REF is 1.18V at 3.3V power supply voltage, and the static current of the circuit is 75uA. Over the wide temperature range of -60~160•C, the temperature coefficient achieves 5.72ppm/•C, and the power supply rejection is -93.26dB at low frequency.

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A2.1-ppm/°C current-mode CMOS bandgap reference with piecewise curvature compensation

Cited by 12 publications

References 6 publications

A 3.95 ppm/°C 7.5 μW Second-Order Curvature Compensated Bandgap Reference in 0.11 μm CMOS

A 3.95 ppm/°C 7.5 μW Second-Order Curvature Compensated Bandgap Reference in 0.11 μm CMOS

A New Piecewise-Compensated Bandgap Reference Circuit with a Trimming Procedure

A low temperature coefficient wide temperature range bandgap reference with high power supply rejection

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