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Multiple-output CMOS weak inversion voltage reference of high PSRR

Xiaojuan Xia

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Abstract

A CMOS voltage reference with multiple-output,high power supply rejection ratio(PSRR)and low temperature coefficient(TC)is presented.It is based on subthreshold MOSFETs and CMOS current-mode structure.Pre-regulator and improved voltage reference core of the circuit are proposed.The circuit,designed and simulated in CSMC standard 0.5μm CMOS technology,exhibits PSRR of 122dB at low frequency and TC of 7ppm/℃ for the range of 0～100℃.

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What this paper is about

A CMOS voltage reference with multiple-output,high power supply rejection ratio(PSRR)and low temperature coefficient(TC)is presented.It is based on subthreshold MOSFETs and CMOS current-mode structure.Pre-regulator and improved voltage reference core of the circuit are proposed.The circuit,designed and simulated in CSMC standard 0.5μm CMOS technology,exhibits PSRR of 122dB at low frequency and TC of 7ppm/℃ for the range of 0～100℃.

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Available abstract

A CMOS voltage reference with multiple-output,high power supply rejection ratio(PSRR)and low temperature coefficient(TC)is presented.It is based on subthreshold MOSFETs and CMOS current-mode structure.Pre-regulator and improved voltage reference core of the circuit are proposed.The circuit,designed and simulated in CSMC standard 0.5μm CMOS technology,exhibits PSRR of 122dB at low frequency and TC of 7ppm/℃ for the range of 0～100℃.

Key concepts: Power supply rejection ratio, CMOS, Subthreshold conduction, Voltage reference, Electrical engineering, Voltage, Dropout voltage, Electronic engineering

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