An Optimal Design Method for CMOS Even-Stage Ring Oscillators Containing Plural Latches

Kohara, Yusuke; Kawakami, Yoshihiro; Uchida, Yasuhisa; Koike, Hideaki; Nakamura, Kazuyuki

doi:10.7567/ssdm.2009.p-5-6

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2010

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“…3,7,8) This paper describes a method for the novel analysis of oscillation stability and an optimal design thereof. 9,10)…”

Section: Introductionmentioning

confidence: 99%

An Optimal Design Method for Complementary Metal Oxide Semiconductor Even-Stage Ring Oscillators Containing Latches

Kohara¹,

Asano²,

Kawakami³

et al. 2010

Jpn. J. Appl. Phys.

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This paper describes a design method for complementary metal oxide semiconductor (CMOS) ring oscillators composed of even-stage inverters. First, we propose a quantitative method to evaluate oscillation stability for an even-stage ring oscillator with a CMOS latch. The method uses static noise margin analysis to evaluate the static random access memory (SRAM) cell's data storage stability, by observing the similarity between the oscillator and SRAM cell circuitry. Next, the method is extended to oscillators with multiple latches. Finally, by analyzing oscillation stability using this method, we find that the range of stable oscillation conditions can be drastically widened by adding multiple single-channel latch circuits, and also by an appropriate design of their polarities and insertion positions. We also clarify through Monte Carlo simulations, that the optimized oscillator circuit is robust under process, voltage and temperature fluctuations and device characteristic variations.

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“…3,7,8) This paper describes a method for the novel analysis of oscillation stability and an optimal design thereof. 9,10)…”

Section: Introductionmentioning

confidence: 99%

An Optimal Design Method for Complementary Metal Oxide Semiconductor Even-Stage Ring Oscillators Containing Latches

Kohara¹,

Asano²,

Kawakami³

et al. 2010

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

show abstract

An Optimal Design Method for CMOS Even-Stage Ring Oscillators Containing Plural Latches

Cited by 1 publication

References 1 publication

An Optimal Design Method for Complementary Metal Oxide Semiconductor Even-Stage Ring Oscillators Containing Latches

An Optimal Design Method for Complementary Metal Oxide Semiconductor Even-Stage Ring Oscillators Containing Latches

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