Design of Low-phase Noise, Low-power Ring Oscillator for OC-48 Application

Ramiah, Harikrishnan; Keat, Chong Wei; Kanesan, Jeevan

doi:10.4103/0377-2063.104161

Cited by 11 publications

(2 citation statements)

References 8 publications

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“…Figure 8 shows these deviations and also indicates the switching frequency as 287.5 KHz at 1.8V, which nearly same as calculated frequency. As the phase noise insights the decision on trade-offs of power, area and noise performance [14], we further studied the phase noise. It fundamentally also limits the dynamic range.…”

Section: Resultsmentioning

confidence: 99%

Performance Analysis of Gated Ring Oscillator Designed for Audio Frequency Range Asynchronous ADC

Deshmukh

2014

VLSICS

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This paper presents performance analysis of Gated Ring Oscillator (GRO). Proposed GRO is designed to employ in implementation of Time to Digital Converter (TDC) block of Asynchronous ADC. For an audio frequency range ADC, minimum GRO stages are designed using asynchronous technique. So leads to reduced area and power. Compared to conventional Ring Oscillator (RO), we avoided to employ the gated clock; to evade clock design related problems like jitter, additional area and power. Instead we preferred gating of ring oscillator itself. Consequently during sleep mode, GRO disables automatically which saves the dynamic power. Furthermore it also provides first order noise shaping of the quantization and mismatch noise. Proposed GRO is implemented with 0.18µm CMOS Digital Technology in Cadence Virtuso environment. GRO performance analysis shows oscillation frequency as 286 KHz with 327ps jitter and average power consumption of 1.08µW.

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Section: Resultsmentioning

confidence: 99%

Performance Analysis of Gated Ring Oscillator Designed for Audio Frequency Range Asynchronous ADC

Deshmukh

2014

VLSICS

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“…In the past, bulky off-chip quartz based ICs were the preferred choice for reference timing generation. Comparatively, MEMS electrostatic resonator based oscillator proved its significance with its system-on-chip (SoC) solution where an inductorless design proved an excellent supplementary choice for the RC-VCO, complying with OC-48 application criteria [ 4 , 5 ]. Nevertheless, the electrostatic resonator based oscillator lags with some setbacks in some dedicatedapplications, but exhibits promising performances in the application of real time clocking (RTC) with a comparatively low output signal level in the MEMS based oscillator, due to the high motional losses of the resonator.…”

Section: Introductionmentioning

confidence: 99%

Design of a MEMS-Based Oscillator Using 180nm CMOS Technology

et al. 2016

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Micro-electro mechanical system (MEMS) based oscillators are revolutionizing the timing industry as a cost effective solution, enhanced with more features, superior performance and better reliability. The design of a sustaining amplifier was triggered primarily to replenish MEMS resonator’s high motion losses due to the possibility of their ‘system-on-chip’ integrated circuit solution. The design of a sustaining amplifier observing high gain and adequate phase shift for an electrostatic clamp-clamp (C-C) beam MEMS resonator, involves the use of an 180nm CMOS process with an unloaded Q of 1000 in realizing a fixed frequency oscillator. A net 122dBΩ transimpedance gain with adequate phase shift has ensured 17.22MHz resonant frequency oscillation with a layout area consumption of 0.121 mm2 in the integrated chip solution, the sustaining amplifier draws 6.3mW with a respective phase noise of -84dBc/Hz at 1kHz offset is achieved within a noise floor of -103dBC/Hz. In this work, a comparison is drawn among similar design studies on the basis of a defined figure of merit (FOM). A low phase noise of 1kHz, high figure of merit and the smaller size of the chip has accredited to the design’s applicability towards in the implementation of a clock generative integrated circuit. In addition to that, this complete silicon based MEMS oscillator in a monolithic solution has offered a cost effective solution for industrial or biomedical electronic applications.

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