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A 65µA 8MHz Integrated Oscillator with LDO Regulator Supply for Low-Power Handheld SoC Applications

Jacob Day*, Paul Vulpoiu**, Jeffery Julich***, Donald Lie****

*Department of Electrical and Computer Engg.,Texas Tech,University,Lubbock,TX,U.S.A

**,***,Texas Instruments Inc.Dallas,TX,U.S.A.

****Associate Professor,Department of Electrical and Computer Engg.,Texas Tech,University,Lubbock,TX,U.S.A

Periodicity:April - June'2008
DOI : https://doi.org/10.26634/jee.1.4.369

Abstract

This paper discusses an 8MHz square wave oscillator used for a clock signal of the digital core of a mixed signal integrated circuit (IC). The frequency is determined by a bias current that charges a capacitor until it triggers a comparator with a voltage reference as the second input. A low drop out (LDO) voltage regulator is used to supply the oscillator so that variations in the battery voltage do not affect the oscillator. The circuits have been designed and taped out and the measured results are closed to the SPICE simulated values. The oscillator has low power consumption of 165 µW which is very attractive for a general handheld device that is operated off of a battery.

Keywords

Oscillator, Switched Capacitor, Analog Deglitch, Low Drop Out Regulator, SoC.

How to Cite this Article?

Jacob Day, Paul Vulpoiu , Jeffery Julich and Donald Lie (2008). A 65µA 8MHz Integrated Oscillator with LDO Regulator Supply for Low-Power Handheld SoC Applications. i-manager’s Journal on Electrical Engineering, 1(4), Apr-Jun 2008, Print ISSN 0973-8835, E-ISSN 2230-7176, pp. 9-14. https://doi.org/10.26634/jee.1.4.369

References

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[4] . C.K. Chava and J. Si Iva-Martinez, "A Frequency Compensation Scheme for LDO Voltage Regulators", IEEE Transactions on Circuits and Systems Vol. 5b pp. 1041-1050(2004).

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A 65µA 8MHz Integrated Oscillator with LDO Regulator Supply for Low-Power Handheld SoC Applications

Abstract

Keywords

How to Cite this Article?

References

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