Wide Frequency Range Voltage Controlled Ring Oscillators based on Transmission Gates

Sheu, Meng-Lieh; Lin, Tsung Yi; Hsu, Wen Lin

doi:10.1109/iscas.2005.1465191

Cited by 19 publications

(4 citation statements)

References 11 publications

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“…A ring oscillator made up of several inverter stages, with the output of the final stage feeding back into the first [5]. To oscillate, the ring must have a phase shift of 2π and a voltage gain of unity at the oscillation frequency.…”

Section: Conventional Circuitmentioning

confidence: 99%

“…The disadvantage of increasing driving capabilities is that it will undoubtedly result in high power consumption. Enlarging the loading capacitor will also take up a lot of die space, and this method is easily influenced by process, voltage, and temperature (PVT) variations [5]. It will also address the issues of high-power consumption and chip space by varying the number of delay stages used to extend the frequency range.…”

Section: Introductionmentioning

confidence: 99%

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Voltage controlled ring oscillator with large frequency range and variable duty cycle

2023

jsthaui

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Voltage controlled oscillator (VCO) is one of the most important basic blocks for analog, digital as well as in mixed signal circuits. This paper presents a new technique to improve the performance of ring oscillators. A VCO with large tuning range and variable duty cycle is designed using 90nm complementary metal-oxide-semiconductor (CMOS) technology with supply voltage of 1.8Vp-p. The simulation results demonstrate that VCO has high frequency range from 100Hz to 1.77GHz and the duty cycle is adjustable 20% -80% independent from the oscillation frequency. Simulation results reveal the better performance of the proposed design as compared to existing current starved ring VCO in terms of oscillation frequency and power consumption.

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Section: Conventional Circuitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Voltage controlled ring oscillator with large frequency range and variable duty cycle

2023

jsthaui

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“…The traditional NOC consists of a Ring oscillator, NOR gate, and cascaded delay blocks. There are several methods reported for the generation of delay block, which is further used to design the ring oscillator and NOC [4][5][6][7][8][9][10][11][12][13][14]. For low frequency applications, the delay bock should provide more delay.…”

Section: Introductionmentioning

confidence: 99%

“…The most efficient and easiest way to design the delay block is using CMOS inverter and current starve inverter [15][16]. Different techniques are reported to increase the delay of the delay block by implementing a voltage scaling technique [6], transmission gate method [7], and inverted inverter [17,18].…”

Section: Introductionmentioning

confidence: 99%

Design of efficient delay block for low frequency application

2020

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In recent years researchers have been focusing on the design of low power and small size oscillator for emerging areas of interest such as the internet of things (IoT) and biomedical applications. In this paper a new delay block for ring oscillator is proposed using CMOS inverter cascaded with inverted current starved inverter (CICSI). The designed delay block provides approximately 50% more delay with a smaller number of transistors than the conventionally designed circuits. Furthermore, a ring oscillator and a non-overlapping clock (NOC) generator are designed using it. The designed circuits can be used in switched capacitor (SC) circuits, analog mixed signal circuits to meet the need for low frequency portable biomedical applications. The designed circuits are simulated on Generic 90nm 1.2V Process Design Kit (GPDK90) using Cadence Virtuoso Design Environment. The simulation result shows the delay of the CICSI delay block is 592ps. The ring oscillator using 101 stages of delay block is designed and it is shown that it operates at a frequency of 17MHz with a power consumption of 420?W.

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A voltage-controlled ring oscillator based on an FGMOS transistor

Sharroush

2017

Microelectronics Journal

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Wide Frequency Range Voltage Controlled Ring Oscillators based on Transmission Gates

Cited by 19 publications

References 11 publications

Voltage controlled ring oscillator with large frequency range and variable duty cycle

Voltage controlled ring oscillator with large frequency range and variable duty cycle

Design of efficient delay block for low frequency application

A voltage-controlled ring oscillator based on an FGMOS transistor

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