A CMOS Voltage Reference Based on Mutual Compensation of Vtn and Vtp

Abstract

A novel temperature-stable nonbandgap voltage reference, which is compatible with standard CMOS technology, is presented in this brief. No diodes or parasitic bipolar transistors are used. Based on mutual temperature compensation of the threshold voltages of nMOS and pMOS transistors, a temperature-insensitive voltage reference with significant reduction in temperature dependence of mobility is achieved without using subthreshold characteristics. The problem of a fixed voltage reference value is also avoided by different parameter design. Experimental results of the proposed voltage reference implemented with a 0.35-μm CMOS process demonstrate that the output of the voltage reference is 847.5 mV, a temperature coefficient of 11.8 ppm/ • C with a temperature range from 0 • C to 130 • C is obtained at 3-V power supply, a power-supply noise attenuation of 72 dB is achieved without any filtering capacitor, and the line regulation is better than 0.185 mV/V from 1.8-V to 4.5-V supply voltage dissipating a maximum supply current of 8 μA. The active area of the presented voltage reference is 90 μm × 120 μm.Index Terms-CMOS voltage reference, nonbandgap voltage reference, power-supply noise attenuation (PSNA) without filtering capacitor, temperature coefficient (TC), temperature compensation.

Study of CMOS-SOI Integrated Temperature Sensing Circuits for On-Chip Temperature Monitoring

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A 12.8 nA and 7.2 ppm/°C CMOS voltage reference without amplifier

“…The area would be large and the resistances mismatch worsens the accuracy. Besides, they typically provide a 1.2-V voltage and require high supply voltage, therefore CMOS voltage reference is introduced [2,3,4]. [5] uses weighted gate-source voltage difference to achieve temperature-compensated voltage reference by two types of transistors with different threshold voltages.…”

A Resistorless Voltage Reference with High-order Temperature Curvature Compensation in 55 nm CMOS Process

“…Many researches have been carried out on high-performance reference circuits with low temperature coefficient (TC) and high PSRR operation [7][8][9][10]. Conventional voltage references are based on bandgap reference (BGR) circuit, which is one of the most fundamental building blocks in integrated circuits [11][12].…”