Chopper stabilized sub 1V reference voltage in 65nm CMOS

Rakesh Kumar Palani; Aravindhan Rangarajan; Ramesh Harjani

doi:10.1109/MWSCAS.2015.7282081

Chopper stabilized sub 1V reference voltage in 65nm CMOS

Rakesh Kumar Palani
, Aravindhan Rangarajan
, Ramesh Harjani

Electrical and Computer Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Scopus citations

Abstract

A sub 1V reference circuit is proposed, that exploits the CTAT and PTAT voltages in the beta multiplier circuit to attain a stable voltage with temperature and power supply. A one-time calibration is integrated in the architecture to get a good performance over process. Further, chopper stabilization is proposed in the circuit itself rather than in the OTA to acheive a 4.8x reduction in integrated flicker noise voltage without increasing power dissipation. The prototype designed in TSMC's 65nm general purpose CMOS for 236mV nominal voltage, shows a temperature coefficient of 18 ppm/°C from -40 to 100°C with a power supply ranging from 0.8 to 2V while consuming 16μA current. Simulated variation in the reference voltage is 0.7mV with power supply at nominal temperature.

Original language	English (US)
Title of host publication	IEEE 58th International Midwest Symposium on Circuits and Systems
Subtitle of host publication	Climbing to New Heights, MWSCAS 2015 - Conference Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781467365574
DOIs	https://doi.org/10.1109/MWSCAS.2015.7282081
State	Published - Sep 28 2015
Event	58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015 - Fort Collins, United States Duration: Aug 2 2015 → Aug 5 2015

Publication series

Name	Midwest Symposium on Circuits and Systems
Volume	2015-September
ISSN (Print)	1548-3746

Other

Other	58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015
Country/Territory	United States
City	Fort Collins
Period	8/2/15 → 8/5/15

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

Keywords

CMOS
subbandgap reference voltage circuit
temperature sensitivity

Publisher link

10.1109/MWSCAS.2015.7282081

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Palani, R. K., Rangarajan, A., & Harjani, R. (2015). Chopper stabilized sub 1V reference voltage in 65nm CMOS. In IEEE 58th International Midwest Symposium on Circuits and Systems: Climbing to New Heights, MWSCAS 2015 - Conference Proceedings Article 7282081 (Midwest Symposium on Circuits and Systems; Vol. 2015-September). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MWSCAS.2015.7282081

Chopper stabilized sub 1V reference voltage in 65nm CMOS. / Palani, Rakesh Kumar; Rangarajan, Aravindhan; Harjani, Ramesh.
IEEE 58th International Midwest Symposium on Circuits and Systems: Climbing to New Heights, MWSCAS 2015 - Conference Proceedings. Institute of Electrical and Electronics Engineers Inc., 2015. 7282081 (Midwest Symposium on Circuits and Systems; Vol. 2015-September).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Palani, RK, Rangarajan, A & Harjani, R 2015, Chopper stabilized sub 1V reference voltage in 65nm CMOS. in IEEE 58th International Midwest Symposium on Circuits and Systems: Climbing to New Heights, MWSCAS 2015 - Conference Proceedings., 7282081, Midwest Symposium on Circuits and Systems, vol. 2015-September, Institute of Electrical and Electronics Engineers Inc., 58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015, Fort Collins, United States, 8/2/15. https://doi.org/10.1109/MWSCAS.2015.7282081

Palani RK, Rangarajan A, Harjani R. Chopper stabilized sub 1V reference voltage in 65nm CMOS. In IEEE 58th International Midwest Symposium on Circuits and Systems: Climbing to New Heights, MWSCAS 2015 - Conference Proceedings. Institute of Electrical and Electronics Engineers Inc. 2015. 7282081. (Midwest Symposium on Circuits and Systems). doi: 10.1109/MWSCAS.2015.7282081

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abstract = "A sub 1V reference circuit is proposed, that exploits the CTAT and PTAT voltages in the beta multiplier circuit to attain a stable voltage with temperature and power supply. A one-time calibration is integrated in the architecture to get a good performance over process. Further, chopper stabilization is proposed in the circuit itself rather than in the OTA to acheive a 4.8x reduction in integrated flicker noise voltage without increasing power dissipation. The prototype designed in TSMC's 65nm general purpose CMOS for 236mV nominal voltage, shows a temperature coefficient of 18 ppm/°C from -40 to 100°C with a power supply ranging from 0.8 to 2V while consuming 16μA current. Simulated variation in the reference voltage is 0.7mV with power supply at nominal temperature.",

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N2 - A sub 1V reference circuit is proposed, that exploits the CTAT and PTAT voltages in the beta multiplier circuit to attain a stable voltage with temperature and power supply. A one-time calibration is integrated in the architecture to get a good performance over process. Further, chopper stabilization is proposed in the circuit itself rather than in the OTA to acheive a 4.8x reduction in integrated flicker noise voltage without increasing power dissipation. The prototype designed in TSMC's 65nm general purpose CMOS for 236mV nominal voltage, shows a temperature coefficient of 18 ppm/°C from -40 to 100°C with a power supply ranging from 0.8 to 2V while consuming 16μA current. Simulated variation in the reference voltage is 0.7mV with power supply at nominal temperature.

AB - A sub 1V reference circuit is proposed, that exploits the CTAT and PTAT voltages in the beta multiplier circuit to attain a stable voltage with temperature and power supply. A one-time calibration is integrated in the architecture to get a good performance over process. Further, chopper stabilization is proposed in the circuit itself rather than in the OTA to acheive a 4.8x reduction in integrated flicker noise voltage without increasing power dissipation. The prototype designed in TSMC's 65nm general purpose CMOS for 236mV nominal voltage, shows a temperature coefficient of 18 ppm/°C from -40 to 100°C with a power supply ranging from 0.8 to 2V while consuming 16μA current. Simulated variation in the reference voltage is 0.7mV with power supply at nominal temperature.

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Chopper stabilized sub 1V reference voltage in 65nm CMOS

Abstract

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