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A high PSRR bandgap reference circuit design

Qin Shui-jie

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Abstract

A novel Banba bandgap reference circuit was presented based on CSMC0.5 Process.In this paper,on the basis of the original circuit,by using cascade current mirror structure,and introduce a negative feedback loop method.Greatly improves the overall circuit power supply rejection ratio.the Spectre simulation results showed that in the-40 ~100 ℃ temperature range,output voltage swing is only 1.7 mV.at low frequency is more than 100 dB power supply rejection ratio(PSRR),the entire circuit power only 30 μA.

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What this paper is about

A novel Banba bandgap reference circuit was presented based on CSMC0.5 Process.In this paper,on the basis of the original circuit,by using cascade current mirror structure,and introduce a negative feedback loop method.Greatly improves the overall circuit power supply rejection ratio.the Spectre simulation results showed that in the-40 ~100 ℃ temperature range,output voltage swing is only 1.7 mV.at low frequency is more than 100 dB power supply rejection ratio(PSRR),the entire circuit power only 30 μA.

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Available abstract

A novel Banba bandgap reference circuit was presented based on CSMC0.5 Process.In this paper,on the basis of the original circuit,by using cascade current mirror structure,and introduce a negative feedback loop method.Greatly improves the overall circuit power supply rejection ratio.the Spectre simulation results showed that in the-40 ~100 ℃ temperature range,output voltage swing is only 1.7 mV.at low frequency is more than 100 dB power supply rejection ratio(PSRR),the entire circuit power only 30 μA.

Key concepts: Power supply rejection ratio, Bandgap voltage reference, Cascade, Power (physics), Current mirror, Voltage, Swing, Electronic engineering

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