Design of Low-voltage Wide Tuning Range CMOS Multipass Voltage-controlled Ring Oscillator PDF Download

Author: Jie Ren
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author: Liang Dai
Publisher: Springer Science & Business Media
ISBN: 1461511453
Category : Technology & Engineering
Languages : en
Pages : 170

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Book Description
Design of High-Performance CMOS Voltage-Controlled Oscillators presents a phase noise modeling framework for CMOS ring oscillators. The analysis considers both linear and nonlinear operation. It indicates that fast rail-to-rail switching has to be achieved to minimize phase noise. Additionally, in conventional design the flicker noise in the bias circuit can potentially dominate the phase noise at low offset frequencies. Therefore, for narrow bandwidth PLLs, noise up conversion for the bias circuits should be minimized. We define the effective Q factor (Qeff) for ring oscillators and predict its increase for CMOS processes with smaller feature sizes. Our phase noise analysis is validated via simulation and measurement results. The digital switching noise coupled through the power supply and substrate is usually the dominant source of clock jitter. Improving the supply and substrate noise immunity of a PLL is a challenging job in hostile environments such as a microprocessor chip where millions of digital gates are present.

Author: Mohd Fadzli Bin Abdollah
Publisher: Centre for Advanced Research on Energy
ISBN: 9670257883
Category :
Languages : en
Pages : 510

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Book Description
This e-book is a compilation of papers presented at the Mechanical Engineering Research Day 2017 (MERD'17) - Melaka, Malaysia on 30 March 2017.

Author: Howard Cam Luong
Publisher: Springer
ISBN: 3319158740
Category : Technology & Engineering
Languages : en
Pages : 214

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Book Description
This book provides in-depth coverage of transformer-based design techniques that enable CMOS oscillators and frequency dividers to achieve state-of-the-art performance. Design, optimization, and measured performance of oscillators and frequency dividers for different applications are discussed in detail, focusing on not only ultra-low supply voltage but also ultra-wide frequency tuning range and locking range. This book will be an invaluable reference for anyone working or interested in CMOS radio-frequency or mm-Wave integrated circuits and systems.

Author: Satmandir Kaur Khalsa
Publisher:
ISBN:
Category :
Languages : en
Pages : 60

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Book Description
To design for high performance circuits, a precision clock with low jitter is needed to meet the high frequency requirements. A phase-locked loop (PLL) is used to achieve the required low jitter. The phase-locked loop architecture can be simplified down to a few major blocks: a phase detector, a loop filter, a voltage-controlled oscillator, and a frequency divider. The voltage-controlled oscillator (VCO) which is the subject of this report uses a ring oscillator that incorporates delay cells using cascode voltage switch logic with data anticipation in the differential inverter design. The data anticipation is achieved by using two PMOS pull up transistors that are controlled by the previous delay cell, thereby increasing the switching speed of the ring oscillator. The cascode voltage switch logic uses complementary signals to minimize jitter. The frequency of the oscillator is controlled by varying the VCO supply voltage, which gives a wide range of frequencies.

Author: Mohit Dua
Publisher: Springer Nature
ISBN: 9811657475
Category : Technology & Engineering
Languages : en
Pages : 853

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Book Description
This book gathers selected high-quality research papers presented at the International Conference on Paradigms of Communication, Computing and Data Sciences (PCCDS 2021), held at the National Institute of Technology, Kurukshetra, India, during May 07–09, 2021. It discusses high-quality and cutting-edge research in the areas of advanced computing, communications, and data science techniques. The book is a collection of latest research articles in computation algorithm, communication, and data sciences, intertwined with each other for efficiency.

Author: Sushil Kumar
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659551574
Category :
Languages : en
Pages : 116

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Book Description
In the tremendous growth of wireless handheld devices, low power consumption becomes a major consideration in radio frequency integrated circuit (RFIC) designs. This book introduces a multistage voltage controlled ring oscillator. The proposed structure uses 45 nm CMOS Technology in cadence. PSS analyses are performed in order to determine the frequency of oscillation and the influence of parameters such as supply voltage, temperature or load capacitance over the oscillation frequency. A transient analysis is performed to illustrate the effects of the parasitic parameters over the oscillation frequency. Ring oscillators with different number of stages like 7, 9 and 11 were designed successfully and their performance parameters are discussed in great detail and compared to reach to solutions to the challenges faced by the current Ring Oscillator technology. The challenges are phase noise, frequency jitter, period jitter, delay, jitter, total harmonic distortion (THD), transfer function etc. and are dealt appropriately in the system designs proposed for different number of stages. For example, a certain signal may have a phase noise of -80 dBc/Hz at an offset of 10 KHz.

Author: Yue Yu
Publisher:
ISBN:
Category : Oscillators, Electric
Languages : en
Pages : 230

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Abstract: The design of voltage-controlled Oscillators nowadays is all about being capable of operating at higher clock frequencies for the purpose of higher data rate, consuming less power for the purpose of longer battery life, and having better phase noise performance for the purpose of higher quality of wireless service and more efficient use of the available frequency spectrum since most of the wireless and mobile terminals that these VCOs work in are required to be able to operate in multiple RF standards to serve new generations of standards while being backward compatible with existing ones, leading to a demand for multi-standard multi-band radio operation that deals with high frequency RF signals that undergo different modulation schemes of different standards in different channels over a wide range of frequency band. A top-down system design from the PLL to the VCO is carried out to determine the specifications for a fully integrated dual-band voltage-controlled oscillator (VCO) designed for a Zero-IF WiMAX/WLAN receiver in a O.18tm CMOS technology with 1.8V supply voltage. A VCO employing a differential cross-coupled inductance-capacitance (LC) tank architecture is proposed to cover twice the desired frequency bands for WiMAX and WLAN standards in order to avoid load pulling between VCO frequency and incoming RF frequency. The switching between two bands is implemented by using two binary-weighted capacitor arrays while switching inside each sub-band is implemented by different digital control signal combinations for the binary-weighted capacitances. A phase noise of -120.7dB/Hz at 1MHz offset frequency is demonstrated for an oscillation frequency of 4.84GHz. The average power consumption of this VCO is 8.1mW. This VCO is developed as an IP (Intellectual Property) to be used in a fully integrated CMOS multi-standard WiMAX/WLAN radio allowing seamless roaming of handheld mobile devices between hotspots in future Wireless Metropolitan Area Network (WMAN). To compare the performance of ring oscillators to that of LC tank oscillators, the designs of two three-stage multiple-pass voltage-controlled ring oscillators with dual-delay paths are demonstrated where the differential delay cell utilizes both the primary loop delay and the negative skewed delay to increase the frequency of oscillation substantially and retain or even increase tuning range. Their phase noise performance is also improved by switching in and out the transistors periodically. In design I, the covered frequency range is from 0.74 GHz to 1.96 GHz, which translates to a tuning range of 90 % A phase noise of -104.995dBc/Hz is demonstrated for an oscillation frequency of 1.8535 GHz. Each stage draws a current of 4.963mA on average from a 1.8V power supply, resulting in a power consumption of 26.8mW. In design II, the covered frequency range is from 1.0478 GHz to 2.0022 GHz, which translates to a tuning range of 63%. The frequency-voltage curve is almost a perfect linear curve for V between OV and 0.9V. A phase noise of -110.O45dBc/Hz is demonstrated for an oscillation frequency of 2.00216 GHz. Each stage draws a current of 10.179mA on average from a 1.8V power supply, resulting in a power consumption of 55mW.

Author: Eum Chan Woo
Publisher:
ISBN:
Category : Metal oxide semiconductors, Complementary
Languages : en
Pages : 136

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Author: Suman Shruti
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659748677
Category :
Languages : en
Pages : 84

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Book Description
A voltage controlled ring oscillator plays very important role in high speed systems due to its easy integration capability. The analysis of different VCOs and their applications are discussed and analyzed in this book. There are number of applications of ring VCOs, one of the most important application is phase locked loop. The main task of the PLL is to maintain the coherence between output signal and reference signal by phase comparison. The proposed PLL using improved performance voltage controlled ring oscillator shows better performance in terms of frequency range and power consumption.