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A Low Voltage CMOS Bandgap Reference

FU Yong-chao

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Abstract

The design of 1-ppm/~°C CMOS bandgap voltage reference with low power supply in temperature compensation and current compensation technology is described in this paper. The differential amplifier is used for bandgap reference negative feedback amplifier,which simplifies circuit design. The biasing of the PMOS current source is derived from the output voltage of the amplifier,leading to a high power supply rejection(PSRR).The bandgap references were implemented in a standard 0.35 μm CMOS process.The entire circuit is simulated with HSPICE simulation tool, the result show low temperature coefficient and high PSRR in this circuit.

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What this paper is about

The design of 1-ppm/~°C CMOS bandgap voltage reference with low power supply in temperature compensation and current compensation technology is described in this paper. The differential amplifier is used for bandgap reference negative feedback amplifier,which simplifies circuit design. The biasing of the PMOS current source is derived from the output voltage of the amplifier,leading to a high power supply rejection(PSRR).The bandgap references were implemented in a standard 0.35 μm CMOS process.The entire circuit is simulated with HSPICE simulation tool, the result show low temperature coefficient and high PSRR in this circuit.

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Available abstract

The design of 1-ppm/~°C CMOS bandgap voltage reference with low power supply in temperature compensation and current compensation technology is described in this paper. The differential amplifier is used for bandgap reference negative feedback amplifier,which simplifies circuit design. The biasing of the PMOS current source is derived from the output voltage of the amplifier,leading to a high power supply rejection(PSRR).The bandgap references were implemented in a standard 0.35 μm CMOS process.The entire circuit is simulated with HSPICE simulation tool, the result show low temperature coefficient and high PSRR in this circuit.

Key concepts: Power supply rejection ratio, Bandgap voltage reference, Electrical engineering, PMOS logic, Differential amplifier, Voltage reference, CMOS, Operational amplifier

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