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A differential on chip oscillator (OCO) is proposed in this paper for low supply voltage, high frequency accuracy and fast startup. The differential architecture helps the OCO achieve a good power supply rejection ratio (PSRR) without using a regulator so as to make the OCO suitable for a low power supply voltage of 1.38V. A reference voltage generator is also developed to generate two output voltages lower than *V _{be}* for low supply voltage operation. The output frequency is locked to 48MHz by a frequency-locked loop (FLL) and a 3.3-ppm/°C temperature coefficient of frequency is realized by the differential voltage ratio adjusting (differential VRA) technique. The startup time is only 1.47μs because the differential OCO is not necessary to charge a big capacitor for ripple reduction.

- Publication
- IEICE TRANSACTIONS on Fundamentals Vol.E104-A No.2 pp.499-505

- Publication Date
- 2021/02/01

- Publicized

- Online ISSN
- 1745-1337

- DOI
- 10.1587/transfun.2020GCP0007

- Type of Manuscript
- Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)

- Category

Guoqiang ZHANG

Renesas Electronics Corporation

Lingjin CAO

Renesas Electronics Corporation

Kosuke YAYAMA

Renesas Electronics Corporation

Akio KATSUSHIMA

Renesas Electronics Corporation

Takahiro MIKI

Renesas Electronics Corporation

The copyright of the original papers published on this site belongs to IEICE. Unauthorized use of the original or translated papers is prohibited. See IEICE Provisions on Copyright for details.

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Guoqiang ZHANG, Lingjin CAO, Kosuke YAYAMA, Akio KATSUSHIMA, Takahiro MIKI, "A Differential on Chip Oscillator with 1.47-μs Startup Time and 3.3-ppm/°C Temperature Coefficient of Frequency" in IEICE TRANSACTIONS on Fundamentals,
vol. E104-A, no. 2, pp. 499-505, February 2021, doi: 10.1587/transfun.2020GCP0007.

Abstract: A differential on chip oscillator (OCO) is proposed in this paper for low supply voltage, high frequency accuracy and fast startup. The differential architecture helps the OCO achieve a good power supply rejection ratio (PSRR) without using a regulator so as to make the OCO suitable for a low power supply voltage of 1.38V. A reference voltage generator is also developed to generate two output voltages lower than *V _{be}* for low supply voltage operation. The output frequency is locked to 48MHz by a frequency-locked loop (FLL) and a 3.3-ppm/°C temperature coefficient of frequency is realized by the differential voltage ratio adjusting (differential VRA) technique. The startup time is only 1.47μs because the differential OCO is not necessary to charge a big capacitor for ripple reduction.

URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.2020GCP0007/_p

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@ARTICLE{e104-a_2_499,

author={Guoqiang ZHANG, Lingjin CAO, Kosuke YAYAMA, Akio KATSUSHIMA, Takahiro MIKI, },

journal={IEICE TRANSACTIONS on Fundamentals},

title={A Differential on Chip Oscillator with 1.47-μs Startup Time and 3.3-ppm/°C Temperature Coefficient of Frequency},

year={2021},

volume={E104-A},

number={2},

pages={499-505},

abstract={A differential on chip oscillator (OCO) is proposed in this paper for low supply voltage, high frequency accuracy and fast startup. The differential architecture helps the OCO achieve a good power supply rejection ratio (PSRR) without using a regulator so as to make the OCO suitable for a low power supply voltage of 1.38V. A reference voltage generator is also developed to generate two output voltages lower than *V _{be}* for low supply voltage operation. The output frequency is locked to 48MHz by a frequency-locked loop (FLL) and a 3.3-ppm/°C temperature coefficient of frequency is realized by the differential voltage ratio adjusting (differential VRA) technique. The startup time is only 1.47μs because the differential OCO is not necessary to charge a big capacitor for ripple reduction.},

keywords={},

doi={10.1587/transfun.2020GCP0007},

ISSN={1745-1337},

month={February},}

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TY - JOUR

TI - A Differential on Chip Oscillator with 1.47-μs Startup Time and 3.3-ppm/°C Temperature Coefficient of Frequency

T2 - IEICE TRANSACTIONS on Fundamentals

SP - 499

EP - 505

AU - Guoqiang ZHANG

AU - Lingjin CAO

AU - Kosuke YAYAMA

AU - Akio KATSUSHIMA

AU - Takahiro MIKI

PY - 2021

DO - 10.1587/transfun.2020GCP0007

JO - IEICE TRANSACTIONS on Fundamentals

SN - 1745-1337

VL - E104-A

IS - 2

JA - IEICE TRANSACTIONS on Fundamentals

Y1 - February 2021

AB - A differential on chip oscillator (OCO) is proposed in this paper for low supply voltage, high frequency accuracy and fast startup. The differential architecture helps the OCO achieve a good power supply rejection ratio (PSRR) without using a regulator so as to make the OCO suitable for a low power supply voltage of 1.38V. A reference voltage generator is also developed to generate two output voltages lower than *V _{be}* for low supply voltage operation. The output frequency is locked to 48MHz by a frequency-locked loop (FLL) and a 3.3-ppm/°C temperature coefficient of frequency is realized by the differential voltage ratio adjusting (differential VRA) technique. The startup time is only 1.47μs because the differential OCO is not necessary to charge a big capacitor for ripple reduction.

ER -