Performance characteristics of an ultra-low power VCO

Deen, M. Jamal; Kazemeini, M.H.; Naseh, Sasan

doi:10.1109/iscas.2003.1205659

Cited by 36 publications

(20 citation statements)

References 9 publications

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“…, where is the total number of delay stages and is delay of each stage [9,10]. Different types of delay cells have been reported in the literature for oscillator design including multiple-feedback loops, dual-delay paths, and single ended delays [11][12][13][14][15][16][17][18][19][20].…”

Section: Isrn Electronicsmentioning

confidence: 99%

A Low Power Voltage Controlled Oscillator Design

Kumar

2013

ISRN Electronics

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The performance of voltage controlled oscillator (VCO) is of great importance for any telecommunication or data transmission network. Here, voltage controlled oscillators (VCOs) using three-transistor NAND gates have been designed. New delay cell with three-transistor NAND gate has been used for designing the ring based VCO circuits. Three-, five-, and seven-stage VCOs have been proposed. Output frequency has been controlled with supply voltage variation from 1.8 V to 2.4 V. Three stage VCO shows output frequency variation in the range of 3.2909 GHz to 4.2280 GHz whereas power consumption varies in the range of 335.4071 W to 486.1816 W. Five-stage VCO depicts frequency in the range of 1.9406 GHz to 2.5769 GHz with power consumption variation from 559.0118 W to 810.3027 W. Moreover a seven-stage VCO shows frequency variation from 1.3984 GHz to 1.8077 GHz. Power consumption of seven-stage VCO varies from 782.6165 W to 1134.400 W. Phase noise results for these VCOs have also been obtained. Power consumption, output frequency, and phase noise results of proposed circuits have been compared with earlier reported circuits, and the proposed circuits show significant improvements.

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Section: Isrn Electronicsmentioning

confidence: 99%

A Low Power Voltage Controlled Oscillator Design

Kumar

2013

ISRN Electronics

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“…However, using a small number of stages in the Ring VCO also results in higher phase noise [10]. The oscillation frequency for a Ring oscillator is given in (14) [42,43].…”

Section: Frequency Power and Area Analysismentioning

confidence: 99%

PLL performance comparison with application to spread spectrum clock generator design

Hsieh

Welch

Sobelman

2009

Analog Integr Circ Sig Process

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This paper presents performance, power and area comparisons of LC vs. Ring VCO-based PLL designs in order to determine the best option for high-speed spread spectrum clock generator (SSCG) designs. Analytical performance, power and area comparisons of LC versus Ring VCO-based PLL designs demonstrate that a Ring VCO can be used to meet the requirements of SATA and SAS applications at rates up to 6 Gbps. The designed SSCG operating frequency range is 2-4.25 GHz with RMS RJ jitter \1.3 and \1.5 pS for non-SSC and SSC modes, respectively, at 3 GHz. The measured EMI reduction is 18 and 21 dB for 2,300 and 4,600 ppm SSC, respectively, also at 3 GHz.

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“…In these applications the RVCO is advantageous, and it has been reported to function down to 80 mV [2]. When V dd decreases below V th the channel in the transistors can no longer exist, and they are working in the weak inversion region.…”

Section: Bulk-controlled Rvco In Weak Inversionmentioning

confidence: 99%

“…We believe that an attractive VCO architecture for use in a FDSM is a voltage-controlled inverter-ring oscillator (RVCO), due to the two following reasons: the possibility of a rather high linearity when frequency tuning is performed from the bulk terminal of the MOS transistors (as shown later), and the low supply voltage and power consumption capabilities of this VCO type [2].…”

Section: Introductionmentioning

confidence: 99%