A Sub-1V Low Power Temperature Compensated Current Reference

Olmos, Alfredo; Boas, A. Vilas; Soldera, J.

doi:10.1109/iscas.2007.378602

Cited by 10 publications

(12 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2. I R is a current mirror branch of current reference described in [1] with reported PSRR + > 90dB from DC to 1MHz.…”

Section: Proposed Programmable-temperature Detection Circuitmentioning

confidence: 99%

“…The circuit solution described herein combines the easiness to generate a CTAT signal with a single properly biased BJT and the PTAT signal generation technique based on Self-cascode MOSFET (SCM) structures, both biased by a low power current reference [1]. It uses MOS transistors operating in weak, moderate and strong inversion and the design relies on the concept of inversion level [2-3].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An ultra low-power low-voltage programmable temperature detection circuit

Olmos¹,

Pietri²,

Coimbra³

et al. 2011

2011 IEEE International Symposium of Circuits and Systems (ISCAS)

Self Cite

View full text Add to dashboard Cite

The design of a low-power low-voltage programmable temperature detection circuit is described. The circuit provides a digital output that signals over-temperature and undertemperature conditions when die temperature rises above or falls below the programmed temperature thresholds. The output is obtained from the comparison between two temperaturerelated signals; the former has a CTAT with fixed thermal coefficient and the latter has an adjustable (PTAT, ZTAT or CTAT) thermal coefficient. The circuit design employs current as the main variable, based on the concept of inversion level. The circuit has been implemented in a 0.25µm standard CMOS process, operates down to 1.5V, occupies an area of 0.0235mm 2 , consumes 750nA including bias circuitry, and has ±5% accuracy for threshold temperatures ranging from -40 o C to 150 o C.

show abstract

“…2. I R is a current mirror branch of current reference described in [1] with reported PSRR + > 90dB from DC to 1MHz.…”

Section: Proposed Programmable-temperature Detection Circuitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An ultra low-power low-voltage programmable temperature detection circuit

Olmos¹,

Pietri²,

Coimbra³

et al. 2011

2011 IEEE International Symposium of Circuits and Systems (ISCAS)

Self Cite

View full text Add to dashboard Cite

show abstract

“…2. The main advantage of this topology is the use of a feedback signal to turn off all start-up circuitry power consumption after start-up process and ensure that the main circuit [8] has attained its steady state DC condition at the end of this process. Before initializing the start-up process through of a power down signal (en/enb), the en signal (enable) is low and the enb signal (negated enable) is high.…”

Section: Circuit Topologymentioning

confidence: 99%

“…To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. 3 illustrates the main resistor-less current reference [8]. Note this resistor-less current reference is merely an example of application for the proposed start-up topology.…”

Section: Circuit Topologymentioning

confidence: 99%

Zero quiescent current startup circuit with automatic turning-off for low power current and voltage reference

Mansano¹,

Boas²,

Olmos³

et al. 2009

Proceedings of the 22nd Annual Symposium on Integrated Circuits and System Design: Chip on the Dunes

Self Cite

View full text Add to dashboard Cite

A zero quiescent current startup circuit with automatic turning-off for low power current and voltage reference is presented. The proposed startup uses positive feedback to sense an internal bias voltage of the main current/voltage reference circuit and guarantees it properly achieves its desired steady state condition. After that, the start-up circuitry automatically turns off itself. Hence, there is no power consumption on start-up circuitry after start-up process. Also, its very robust architecture is compatible with standard CMOS processes and is able to operate down to sub-1V making it ideal for single battery applications. The circuit has been integrated in a 45nA current source implemented in TSMC 0.25um process. Transient response of the start-up circuitry has been measured as well as supply voltage variation has been evaluated to prove start-up operation.

show abstract

“…Such design technique, that adopts the current as the main design variable, has been widely employed to develop voltage and current references as well as temperature detection circuits as described in [5][6][7]. This paper presents the design of a new sub-1V, low power, low voltage, temperature compensated (i.e., ZTAT) voltage reference using the technology-independent inversion level methodology described in [3][4][5][6][7]. The simple circuit relies on a Self-Cascode MOSFET (SCM) structure implemented using 2 NMOS transistors with different threshold voltages, devices that nowadays are usually available in many standard CMOS processes.…”

Section: Introductionmentioning

confidence: 99%

A 2-Transistor Sub-1V Low Power Temperature Compensated CMOS Voltage Reference

Olmos¹,

Brito²,

Ferreira³

et al. 2014

Proceedings of the 27th Symposium on Integrated Circuits and Systems Design

Self Cite

View full text Add to dashboard Cite

This paper presents the design of a CMOS sub-1V voltage reference using a 2-transistor Self-Cascode MOSFET structure able to get low power consumption, temperature compensation, and small area. An efficient design procedure applied to this simple topology relying on NMOS transistors with different threshold voltages allows attaining large immunity against bias current and supply voltage variations. Besides that, the two transistors can operate in weak, moderate, or strong inversion making the design flexible in terms of area and power consumption. Implemented in a 0.18m standard CMOS technology, the circuit provides a 400mV voltage reference with a variation of ±0.18% from -20°C to 75°C (or less than 15ppm/°C), operates from 3.6V down to 800mV while biased with a 5nA resistor-less PTAT current source that varies ±30% over PVT, and consumes less than 20nA. The complete circuit including the current source and the 2-transistor Self-Cascode MOSFET occupies an area of 0.01mm 2 .

show abstract

A Sub-1V Low Power Temperature Compensated Current Reference

Cited by 10 publications

References 6 publications

An ultra low-power low-voltage programmable temperature detection circuit

An ultra low-power low-voltage programmable temperature detection circuit

Zero quiescent current startup circuit with automatic turning-off for low power current and voltage reference

A 2-Transistor Sub-1V Low Power Temperature Compensated CMOS Voltage Reference

Contact Info

Product

Resources

About