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Super Performance CMOS Band-Gap Voltage Reference

Yan Xiao-lang

Open publisher page 3 citations

Abstract

This paper proposes a new type of band-gap voltage reference.A cascode current mirror is used to produce bias currents and hence PMOS channel length modulation errors are reduced.Supply noise is suppressed by adding a simple voltage subtractor circuit.Simulation using Hspice is based on the CSMC 0.6um CMOS process.The results show the temperature coefficient is 2.93×105 ℃ between the temperature range of-50 ℃ to +100 ℃ and the PSR is the-84.2 dB.The band-gap output voltage is within 2.5±0.0012 V when the supply voltage is between 3.5 V and 6.5 V.Therefore,it is an effective way to implement a band-gap voltage reference.

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What this paper is about

This paper proposes a new type of band-gap voltage reference.A cascode current mirror is used to produce bias currents and hence PMOS channel length modulation errors are reduced.Supply noise is suppressed by adding a simple voltage subtractor circuit.Simulation using Hspice is based on the CSMC 0.6um CMOS process.The results show the temperature coefficient is 2.93×105 ℃ between the temperature range of-50 ℃ to +100 ℃ and the PSR is the-84.2 dB.The band-gap output voltage is within 2.5±0.0012 V when the supply voltage is between 3.5 V and 6.5 V.Therefore,it is an effective way to implement a band-gap voltage reference.

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Available abstract

This paper proposes a new type of band-gap voltage reference.A cascode current mirror is used to produce bias currents and hence PMOS channel length modulation errors are reduced.Supply noise is suppressed by adding a simple voltage subtractor circuit.Simulation using Hspice is based on the CSMC 0.6um CMOS process.The results show the temperature coefficient is 2.93×105 ℃ between the temperature range of-50 ℃ to +100 ℃ and the PSR is the-84.2 dB.The band-gap output voltage is within 2.5±0.0012 V when the supply voltage is between 3.5 V and 6.5 V.Therefore,it is an effective way to implement a band-gap voltage reference.

Key concepts: Bandgap voltage reference, Voltage reference, PMOS logic, Cascode, Voltage, Electrical engineering, CMOS, Silicon bandgap temperature sensor

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